SK288577B6 - Dual two-stage gear - Google Patents

Abstract

Dual two-stage gear consists of two two-stage gear with two outputs and its basic principle is transformation of movement that lets create a wide range of gear ratios separately for each of the two outputs.

Description

Technical field

The proposed solution belongs to the area of transmission mechanisms. The technical solution relates to a new double two-speed transmission with one input shaft and two internal impellers geared to two output shafts with mutual mutual output, with the possibility of achieving large-scale gear ratios, with different sizes of gears on output shafts with relatively smaller requirements space and weight over conventional gears

BACKGROUND OF THE INVENTION

Several types of mechanical transmissions are known in the art, where the sarotation movement of the input member transforms through the eccentric movement of the rotating wheel back to the centric rotational output movement. This area includes e.g. known harmonic and planetary transmissions. The disadvantage of harmonic transmissions is in particular the use of a flexible member in their design, which is often a limiting factor in the life and performance of the transmission. The disadvantage of planetary transfers is their complexity. The complexity of the planetary gears is further increased when it comes to converting one input shaft to multiple output shafts. Also known are cycloidal-based transmissions, the disadvantage of which is, in particular, the complexity of transmitting eccentric motion to centric, which limits their lifetime and stability, and the accuracy of their declared lifetime.

The presently used gears are intended to transmit power from a predominantly one input shaft to one output shaft. The survey conducted so far shows that the proposed principle of solution does not exist in technical practice at present.

SUMMARY OF THE INVENTION

The essence of the proposed solution is a transmission mechanism consisting of two two-stage gears solved on the new principle of transforming the transmission of motion and power of one input shaft into two output shafts with two-sided output

The essence of the proposed solution consists of two internal impellers, which are rotatable on two eccentric parts of the input shaft, which with one external toothing engage the corresponding internal toothing of the crown wheel fixedly connected to the housing body. This co-operation constitutes the first stage of a two-stage transmission. At the same time, the second gear rims of the internal impellers engage the gear rims firmly connected to the output shafts. These self-engaging toothed pairs form a second gear stage with the same eccentricity as the first gear. Thus, the eccentric movement of the internal impellers is transformed to centric in each of the co-engaging pairs of the second gear and transmitted to the output shaft. The eccentricity of the impellers may vary depending on the overall transmission ratios required between the input and output shafts. With a suitably selected number of teeth in both gears, a wide range of overall gear ratios can be achieved, from low to very high gear ratios. The gears can be fitted with different types of gearing (involute, cycloid, etc.) or they can be equipped with friction surfaces to create a friction transmission with the possibility of large gear ratios.

The proposed technical solution has the advantage of the possibility of several output shafts with different gear ratios compared to conventional mechanical transmissions. Compared to harmonious gears, this design has the advantage in the absence of a flexible member (so-called Pot wheel) when achieving similar gears.

BRIEF DESCRIPTION OF THE DRAWINGS

The dual two-stage transmission with two internal impellers and two output shafts is shown schematically in a vertical sectional view in FIG. First

An embodiment of the invention

An example of a double two-stage transmission with two internal impellers is a gear mechanism in which an eccentric gear 6 with external toothing 15 is rotatably mounted on the input shaft 6 rotatably mounted in the bearings 7 and 11 and rotates freely in the bearings 9 at the input shaft. rotation of the input shaft 1 occupies its external toothing 15 with the internal toothing 16 positioned

The eccentric rotation of the gear 6 is transformed by means of pairs of co-meshing teeth 13 of the wheel 6 with the gear 14 of the return output shaft 3. Further, on the input shaft 1 rotatably mounted in the bearings 7 and EL there is a second eccentric bearing gear. a gear 5 with external toothing 17 which freely rotates on the input shaft in bearings 10 and when rotating the input shaft 1 occupies its outer toothing 17 with the internal toothing 18 located on the inside of the gearbox 4. The eccentric rotation of the gear 5 is transformed by pairs of the toothing 19 of the wheel 5 with the toothing 20 of the output shaft 2 mounted in the bearings 12.

Industrial usability

The proposed solution with double two-stage transmission with double-sided output can be used especially in various devices of power or kinematic transmission mechanisms, where different values of transmission ratios with two outputs are required, from multiplication to large reduction of output15 revolutions with relatively smaller space requirements and the weight of the double-speed transmission mechanism compared to current conventional solutions

This technical solution also offers the advantage of replacing two multi-stage conventional gears with a newly designed double two-speed transmission

Claims (1)

PATENT CLAIMS Double two-speed transmission with an internal device located in the gearbox, characterized in that the gear (6) with the external gear (15) is rotatable and eccentric located on the input shaft (1) and engages the internal gear (16) of the gearbox ( 4), wherein the toothing (13) of the gear (6) engages with the toothing (14) of the output shaft (3), and the gear (5) with the external toothing (17) is rotatable and eccentric located on the input shaft (1); It engages with the internal toothing (18) of the gearbox (4), while at the same time the toothing (19) of the gear (5) engages with the toothing (20) of the output shaft (2).