SU1664760A1 - Rotary table drive - Google Patents

Abstract

The invention relates to the construction industry, to glass manufacturing, in particular to mechanisms with step-by-step movement, rotary table drives, mainly for furnaces for heating and pressing automobile spherical mirrors. The goal is to increase reliability by increasing the smoothness of the shutdown. This is achieved by making a rotary element in the form of a gear 12 mounted on the output shaft 11 of the gearbox 9 and engaged with the gear wheel 13. The wheel 13 is mounted on the column 2 of the table 1. The pressing mechanism of the gear 12 is made in the form of a table mounted on the column 2 1 of a disc 14, a roller 15 interacting with it. This embodiment allows a continuous change in the distance from the center of the drive gear 12 to the pole of its engagement with the wheel 13, which ensures a smooth stop. 1 hp ff, 2 ill.

Description

The invention relates to the construction industry, glass manufacturing, in particular to gears, and stepping mechanisms, namely, rotary table drives.

The purpose of the invention is to increase reliability.

Figure 1 shows the kinematic drive diagram, top view; figure 2 is the same, a front view in section.

The turntable drive is installed under the turntable 1, which is rotatably mounted on the column 2. Spindles 3 are mounted on the table with the forms 4 (the forms rotation drive is not shown). Rollers 5 are installed coaxially with them under the spindles 3 for fixing the table 1 when pressing with punches. B.

The table drive includes a motor 7 with a built-in electromagnetic brake, connected by means of a safety coupling 8 to a gearbox 9. They are mounted on a plate 10. On a vertical output shaft 11 of a gearbox 9 eccentrically fixed a swivel element 12 in the form of a gear that meshes with the gear wheel 13, mounted on a column 2 of table 1. The eccentricity of gear 12 is equal to the radius of its pitch circle. The ratio of numbers, teeth of the wheel 13 and gear 12 is equal to the number of spindles 3 so. that one turn of gear 12 corresponds to the rotation of table 1 by one step.

Above the wheel 13, a disk 14 is fixed on the column 2, and a roller 15 mounted on the shaft 11 is pressed against it. The sum of the radii of the disk 14 and roller 1B is the calculated center-to-center distance of the gears 12 and 13.

The roller 15 is pressed against the disk 14 by a pneumatic cylinder 16 pivotally connected to the lever 17 of the retainer and through a lead 18 to the shaft 11 of the gear 12. The prism 19 fixed to the lever 17, which engages the rollers 5 of the table 1.

A flag 20 is fixed on the shaft 11 and communicating with a switch 21 indicating the initial position of the gear 12, corresponding to the zero speed of the table 1, when the shaft 11 of the gear 12 is located under the pole of the gear 12 with the wheel 13.

When using a drive without detent, no rollers 5, leash 18 and lever are needed.

17 with a prism 19. a pneumatic cylinder 16 may

be attached directly to the shaft

11 or to the stove 10.

The drive works as follows. When you turn on the engine 7 begins to rotate the output shaft 11 of the gearbox 9 and

eccentric gear 12. In this case, the uniform rotation of the output shaft 11 of the gearbox 9 is converted into uneven rotation of the wheel 13 and the table 1, and, since

the eccentricity of the gear 12 is equal to the radius of its pitch circle, at the beginning and end of the turn of the table 1 its speed is zero.

At the end of the rotation by command, switch 21 from flag 20 is turned off and the motor 7 brakes with an electromagnetic brake. Since the table speed is almost zero at the time of the command to turn off the engine, the inertial switch of the table after the engine is off is absent, and the response time of disabling virtually no effect on position accuracy

0 stop or affects to a much lesser extent compared with the case when the command to turn off the engine is given at a working or even reduced speed of the table, so bringing the table

5 to the exact stop position by means of the latch may not be necessary. In this form, the drive can be used in a carousel car wash blanks automotive spherical mirrors.

0 In a drive with a lock, simultaneously with the engine 7 shutting down, the air supply to the pneumatic cylinder 16, which turns the lever 17, brings the prism 19 to the roller 5, switches. The bevels of the prism 19 are affected.

5 to roller 5, bring table 1 to the exact stop position and fix it. The gear 12 is hereby retracted from the wheel 13 by means of the leash 18.

Gear module, dimensions

0 links and the stroke of the pneumatic cylinder are chosen from the condition that even with the greatest course of the pneumatic cylinder 16, the movement of gear 12 is such that the gear pinion 12 does not extend beyond the teeth of wheel 13, so that

5 after the return stroke of the pneumatic cylinder. decompression of the table and the restoration of the gearing of the position of the table 1 relative to gear 12 is resumed to the state it was at the end of the turn

0 table.

Pneumatic cylinder 16 as a drive works only during locking - detents of the table 1, and during the turn of the table 1 it works like a spring and, in the case of using the drive without a clamp, it can be replaced by a spring.

Claims (2)

Claim 1. Rotary table drive comprising a rotatable plate with mounted on it the motor and gearbox, on the shaft of which a rotary element with a drive mechanism with a drive mechanism is mounted, is distinguished / and so that, in order to increase reliability, it is equipped with gear to wheel and disk mounted on the table, the rotary element is made in the form of an eccentric gear, engages with a gear wheel, and a pressing mechanism in the field with a roller-connected driver with a drive, while the roller is mounted on the gear shaft with the possibility of contact with the disk. 2. The actuator according to claim 1, characterized in that it is provided with a table lock, made in the form of a lever connected to the drive of the pressing mechanism and the driver. / 3 J 1