CS239082B1 - Continuously variable eccentricity transmission - Google Patents

Abstract

The transmission with continuously variable eccentricity during operation was developed specifically for a laboratory shaker. It contains a shaft, the upper part of which is firmly connected to a drive plate, in which a pin connected to a crank is eccentrically located. The essence of the invention lies in the fact that the pin (15) is connected under the drive plate (7) to a wheel with helical teeth (10), which is in permanent engagement with a wheel with helical teeth (6) firmly mounted on a bushing (14) slidably mounted on a shaft (12), with which it is in permanent engagement.

Description

(54) Transmission with continuously variable eccentricity on the fly

Gearing with continuously variable eccentricity on the fly was developed specifically for the laboratory shaker. It comprises a shaft, the upper part of which is rigidly connected to a driving plate, in which a pin connected to the crank is eccentrically located. The principle of the invention consists in that the pin (15) is connected under the driving plate (7) to the helical wheel (10), which is in permanent engagement with the helical wheel (6) fixedly mounted on the bush (14) mounted slidingly. on the shaft (12) with which it is permanently engaged.

259 082 (51) Int Cl?

P 16 Feb 25/06

239 082

The invention relates to a transmission by which the eccentricity of the drive pin can be varied continuously and during operation, for example to move a shaker.

Known transmission devices for continuously changing eccentricity during operation comprise a rotary circular plate on which a pin is mounted eccentrically, which is to transmit its movement to the drive or transmission device or to the shaker table. The pin carried by the circular plate performs a circular movement. In some cases, such as rotary shakers, it may be necessary to vary the radius of the circular motion. Most often there is a slide on the rotating plate for shifting the pin position. In order to adjust its position continuously and with the rotating device running, the rotating circular plate is mounted on a hollow shaft; through which a drawbar passes, the height position of which is controlled at the bottom by a screw. The upper part of the rod is connected to the rectangular lever under the circular plate, which moves the pin in the carriage.

The described devices, as well as 1 other known devices for the continuous transfer of eccentricity, are complicated especially in the part in which the position of the pin changes with the rotation of the circular plate.

This disadvantage is overcome by the continuously variable centricity transmission according to the invention, which comprises a vertical shaft, the upper part of which is rigidly connected to the carrier plate, in which the pin connected to the crank is eccentrically positioned. The principle is that the pin is connected to the helical-toothed wheel under the carrier plate, which is in permanent engagement with the helical-toothed wheel fixedly mounted on a bush mounted on the shaft with which it is in permanent engagement.

- 2 239 082

A continuously variable transmission eccentricity transmission made according to the present invention has a great advantage in simplicity of execution.

In the appended drawing, a continuously variable eccentric transmission is shown in an asymmetric view.

The transmission is located in a housing 1, which will be part of the rotating device during the realization. In the lower plate there is a lower bearing for receiving a vertical shaft 11, which is rigidly connected at the top to a driving plate 1 of a circular shape, which by its outer circumference is mounted in the upper bearing 2 in the upper plate of the housing 1. it is guided in its groove by its not shown wedge & · The bushing I therefore rotates with the shaft H and is also height adjustable on this shaft 1Z. The height adjustment is made possible by the adjusting bearing 2 covered by the sleeve 11, whose height position is controlled by the lever 1. The bevel gear 2 is fixedly mounted on the upper part of the sleeve 14, which is in permanent engagement with the bevel gear 1S. Its pin 12 is rotatably mounted in a housing 2 located in the carrier plate 1. On the part of the pin 12 protruding above the carrier plate Z, a crank 6 is mounted which controls a mechanism, for example a shaker table. The two helical-toothed wheels 10, 10 perform the same movement as the drive plate Z and do not perform any relative movement with respect to each other. If the helical gear wheel 2 is moved up or down by the lever 1, the helical gear wheel Ifi and at the same time the crank 1, which has different radius of circular orbital movement in different positions, are rotated. This eccentricity adjustment can be carried out smoothly on the fly without difficulty. For example, the handle δ, indicated by a solid line in position 0, does not perform any orbital motion, since its vertical part lies in the axis of the shaft 11, the handle δ, indicated by dashed line in position x, performs a orbital movement.

Claims (1)

OBJECT OF THE INVENTION 239 082 A continuously variable eccentric transmission comprising a vertical wing, the upper part of which is rigidly connected to a carrier plate, in which a pin connected to the crank is eccentrically located, characterized in that the pin (15) is connected below the carrier plate (7) with a helical-toothed wheel (10) which is in permanent engagement with a helical-toothed wheel (6) fixedly mounted on a sleeve (14) mounted slidably on the shaft (12) with which it is permanently engaged.