JPH0195538U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1A is a schematic external view showing one embodiment of the tension equalizing drive device of the present invention, and Fig. 1B is a schematic diagram of the tension equalization drive device of Fig. 1A applied to a timing belt drive device of an internal combustion engine. The configuration diagram, Figure 2, shows the tension due to the valve train drive torque and the first
Figure A is a characteristic diagram showing the relationship with tension caused by the equal tension drive device, Figure 3 is a schematic configuration diagram of a conventional timing belt drive unit for an internal combustion engine, and Figure 4 shows torque fluctuations and tension fluctuations in the valve train system. Characteristic diagram shown, No. 5
The figure is a graph showing the relationship between belt tension and engine speed. DESCRIPTION OF SYMBOLS 1... Equal tension drive device, 2... Toothed pulley on the drive shaft of the camshaft, 3... Toothed timing belt, 4... Auto tensioner, 9... Toothed pulley on the drive shaft of the oil pump, 10... Idler.

Claims (1)

[Scope of utility model registration request] An equal tension drive in which the rotation of the driving vehicle is transmitted to the driven vehicle by a power transmission member that is connected to the output shaft of a four-cylinder internal combustion engine and is extended between the driving vehicle and the driven vehicle, where rotational fluctuations occur periodically. In the apparatus, the outer peripheral edge shape of the driving wheel is formed into an elliptical shape having a major axis/minor axis ratio according to the tension fluctuation of the power transmission member due to the periodic rotational fluctuation, and the tension fluctuation is in an opposite phase to the tension fluctuation. An equal tension drive device, characterized in that the drive wheel is arranged to apply force to the power transmission member.