Machine element or mechanism – Mechanical movements – Rotary to intermittent unidirectional motion
Patent
1993-01-19
1994-05-10
Herrmann, Allan D.
Machine element or mechanism
Mechanical movements
Rotary to intermittent unidirectional motion
192 45, F16H 2908
Patent
active
053097815
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a stepless speed change gear using one or more one-way clutches.
There have been many kinds of stepless speed change gears according to the prior art such as a chain drive type, a traction drive type, a slide coupling type and so on including a one-way clutch type as illustrated in FIG. 17.
In the stepless speed change gear shown in FIG. 17, a speed change link 7' having a movable support point Q' is connected to a transmission link 5' which is connected to an input shaft 3' and an input side member 4' which rotates about a center p' of an output shaft of a one-way clutch. However, such a stepless speed change gear is insufficient in link mechanism and can be used only for transmission of small power.
There are problems in the other type of stepless speed change gears such as the traction drive type, etc. that not only they have large transmission loss but also they have large size, heavy weight and complicated construction.
SUMMARY OF THE INVENTION
To solve the above mentioned problems in the prior art, the present invention intends to provide a stepless speed change gear of simple construction with reliable action, small size and light weight and suitable for transmitting even large power.
To achieve the above object, a stepless speed change gear according to the first invention is characterized to comprise: an input shaft; an input shaft crank being fitted to the input shaft to a right angle direction and being provided with a connecting part; an input connecting rod being connected to the connecting part at one end side and being provided with the other end side connecting part; an output connecting rod being connected to the other end side connecting part at one end side and being provided with the other end side connecting part; a one-way clutch to transmit torque to one direction only and being provided with an output shaft disposed in the same direction to the input shaft and an input side member being connected to said the other end side connecting part of the output connecting rod at one end side swingably about a center of the output shaft; a speed change link being connected to the other end side connecting part of the input connecting rod at one end side and being positioned at an optional position in a given moving range at the other end side; fixing means to fix the other end side of the speed change link; the input connecting rod, the output connecting rod, the input side member and the speed change link being swingable in each plain a direction of which is the same as a direction of rotation of the input shaft crank.
In addition to the above features, a stepless speed change gear according to the second invention is characterized in that the speed change link is provided with a second connecting part at the one end side and the output connecting rod is connected to the second connecting part at the one end side instead of connected to the other end connecting part of the input connecting rod.
In addition to the features of the first invention, a stepless speed change gear according to the third invention is characterized in that a disk-like member being fixed to the input shaft at an eccentric position and a rotating member being supported rotatably on a circumferential surface of the disk-like member are comprised instead of the input shaft crank and the input connecting rod.
In addition to the features of the first invention, a stepless speed change gear according to the fourth invention is characterized in that the other end side of the speed change link moves a given locus range from a position where the output connecting rod becomes orthogonal to both the speed change link and the input side member to a position where the output connecting rod and the speed change link line up in a straight line.
In addition to the features of the first invention, a stepless speed change gear according to the fifth invention is characterized in that the one-way clutch is a rolling bearing clutch comprising an inner rotation body, an oute
REFERENCES:
patent: 954384 (1910-04-01), Fellows
patent: 1201125 (1916-10-01), Weeks
patent: 1401538 (1921-12-01), Kessler
patent: 2935385 (1960-05-01), Cornelison
patent: 3557921 (1971-01-01), Takada
patent: 5035309 (1991-07-01), Takada
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