US 2015/0217831 A1Published application

Device for driving a common shaft by pushing and pulling

AssigneeStringdrive Technologies Kft.

InventorsRobert Kohlheb, Zoltan Kalazi

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Abstract

Device for driving a common shaft by pushing and pulling hand movements, that comprises respective driving bars for the left and right hands, and a mechanical unit that converts both the forward and backward movements of the pushed, respectively pulled driving bars to rotate a driven shaft, wherein respective biased rope drums (28, 29; 61, 62) are provided at both sides of the driven shaft, and on the rope drums respective ropes (30, 60) are arranged as windings, and the driving bars (15, 16; 51) are interconnected and pivoted around a common shaft (17, 52), the ropes are coupled to the respective driving bars in such a way that at one of the two sides an assembly is provided that reverses the direction of the rope displacement to become opposite to the direction of the displacement of the associated driving bar (16).

Device for driving a common shaft of a vehicle by pushing and pulling hand movements, especially for three-wheeled vehicles for disabled subjects that comprises respective driving bars at the respective sides of the vehicle for the left and right hands, and a mechanical unit that converts both the forward and backward movements of the pushed, respectively pulled driving bars to rotate a driven shaft, characterized in that respective biased rope drums (28, 29;

61, 62) are provided at both sides of the driven shaft, and on said rope drums (28, 29;
61, 62) respective ropes (30, 60) are arranged so that at each side a winding is provided on said rope drums (28, 29;
61, 62) with a predetermined number of turns, and the pulling of the respective ropes (30, 60) causes rotation of the shaft in the same direction, and the driving bars (15, 16;
51) are interconnected and they are pivoted for limited angular displacement around a common shaft (17, 52), and in a first direction the displacement requires pushing motion and in the opposite second direction pulling motion, and at the respective driving bars (15, 16;
51) owing to their interconnection the pushing and pulling motions cause simultaneous and identical bar displacements at both sides, the ropes (30, 60) that are associated with and connected to the respective rope drums (28, 29;
61, 62) are connected to the respective driving bars (15, 16;
51) in such a way that at one of the two sides an assembly is provided that reverses the direction of the rope displacement to become opposite to the direction of the displacement of the associated driving bar (16), and the driven shaft is the shaft of the driven wheel (11, 41) of the vehicle, whereby the pushing movement results in the pulling of the associated rope (30, 60), and one of the rope drums (28, 61) is driven by the pushing movement of the driving bars (15, 16;
51), while the other rope drum (29, 62) is driven by the pulling motion of the driving bars (15, 16;
51).

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Abstract

Claims10