Gearless Power Transmission Mechanism Using L-Shape Rod: A Review.pdf

Current era of engineering requires speed on each and every field. Hence rapidness and quick working is the most important. Now days for achieving rapidness, various machines and equipment’s are manufactured. Gears are costly to manufacture. Its need to increase the efficiency of transmission which cannot be done using geared transmission. Gearless transmission mechanism is capable of transmitting power at any angle without any gears being manufactured. So here we introduced a mechanism which is very important defining application in replacement of gear. It is mainly based on the theoretical, analytical and Finite Element method.

Abstract: The main aim of this review paper is to give detail study about the gearless power transmission mechanism at right angle (900) with the help of L-shape rod (EL-Bow Rod) of uniform diameter, Dimension (Identical rod). The mechanism is very important defining application in replacement of gear. It is mainly based on the theoretical, analytical and Finite Element Method (or FEA). Figuring of various parameters such as number of pins, material, dimension difference of component, speed and torque. Gearless power transmission for skew shafts minimize the losses, costs and save the time and space. This system countenance the changing in the orientation of shaft during motion which is very interesting and bewitching about this mechanism. Odd pins or links like 3, 5, 7, 9…must be used in this system and each links are fixed in the drilled hole at both ends of the shafts due to which motion is transferred. Functionally the system is very smooth and work effectively with a very minimum amount of power losses.

Working: The gearless power transmission or EL-Bow power transmission mechanism is a mechanism possesses single degree of freedom used for transmitting the motion at any definite angle between the two shafts. The synthesis of this mechanism would divulge that it comprises of a number of pins would be in between 3 to 8, the more the pins the smoother the operation. This odd number of pins skid inside the hollow cylinders thus forms a sliding/skidding pair. Our mechanism deals with 3 such sliding pair. The two ends of the shaft possesses two identical flange each flange have 3 cylindrical holes at 1200 to each other. This entire assembly is mounted on the wooden board having dimension 500mm×350mm. The input power is given by an electric motor. The working of such mechanism can understand by the diagram shown below. The unused form of power transmission on shaft located at an angle. The motion is transmitted from driving to the driven shafts through the rod which are bent to conform to the angles between the shafts. These roads are located in cylindrical holes equally spaced around a circle and they are free to slide in & out as the shafts revolve. This type of power transmission is generally suitable where quite operation at high speed is essential but only recommended for high duty. Proper position of two ends of shafts is required to slide each rod in the definite direction. The rod dimension is design based on the power transmission criteria.

Functions of some successful mechanical devices is smoothly however fly they are made while some other does this only by virtue of an accurate construction & fitting of their moving parts. The mechanism looks very simple and easy to fabricate, actually very tough to conceptualize and envisage without observing a real one in practice. Firstly study on the desirable motion and we have done that everything. We ascertain that while satisfactory analytic thinking for existing mechanism can often be Made quite easily we cannot without insight & imagination make effective synthesis of new mechanism hence we are cast to present this project gear less transmission mechanism at 900 which we get managed to successfully device after hard input and long work in conceiving its working principle.

Design, fabrication and analysis of the mechanism is done using the following parameters:
1 Frame Wood 500x350 1
2 Circular Disk MS Dia150x70 2
3 Shaft Silver Steel Dia20x400 2
4 Bent Link BMS Dia10x150 3
5 Bearing C