192 clutches and power-stop control – Clutches – Automatic
Patent
1998-06-01
2000-07-18
Marmor, Charles A
192 clutches and power-stop control
Clutches
Automatic
192 30R, F16D 334
Patent
active
06089363&
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a friction resistance generator for applying discretionary resistance by frictional force to rotary movement or rectilinear movement in various kinds of machines and equipment.
2. Description of the Prior Art
Bearings or guides being so far known as one type of mechanical elements can be broadly categorized into slide bearings or slide guides which are structured to support movable members through the aid of lubricating oil and roller bearings or roller guides which are structured to support the movable members through the aid of balls or rollers. They are intended to make the movable members always move smoothly diminishing the friction resistance between mating members as small as possible. Consequently, since conventional bearings or guides are not intended to apply resistance to moving members to control the moving force, additional attenuation means such as a shock absorber or damper becomes necessary when it is necessary to control the moving speed of the movable member to a constant level.
Meanwhile, with slide bearings or slide guides using lubricating oil, although the frictional resistance can be diminished to an extremely low level if lubricating oil stays between mating members under an ideal state, under low speed movement or heavy load movement, oil film existing between the mating slide surfaces can be damaged resulting to intermittent occurrences of static friction and dynamic friction producing extremely unstable frictional force, thus tending to cause so called stick-slip phenomenon.
Like aforesaid, among conventional machine elements, although there do exist machine elements that can provide smoother rotary or rectilinear motions, such a mechanical element as is capable of controlling the movement speed to a constant level without addition of particular external structures or as is capable of producing stable and easily controllable resistance force does not exist. Therefore, there is some margin for further development work being left in this technological field for provision of discretionary frictional resistance to rotary or rectilinear motions occurring in various kinds of machines and equipment.
The present invention was conceived in view of the above problems. It is therefore an object thereof to provide a mechanism of a simple structure for generating always stable and discretionary frictional resistance to rotary movement or rectilinear movement of various material bodies at any moving speeds and, moreover, for easily controlling magnitude of said frictional force by changing the load.
SUMMARY OF THE INVENTION
In order to achieve the above object, the present invention provides a friction resistance generator comprising a rotary member which rotates on a prescribed axis of rotation, a passive member which faces the rotary member in the axial direction, numerous rollers being located between the rotary member and the passive member, said rollers making rolling motions in contact with the rotary member and the passive member, and a cage which maintains the rollers at prescribed intervals along a prescribed peripheral line around the axis of rotation of the rotary member while allowing free rolling of the rollers, in which axes of rolling of the rollers are so inclined to produce a prescribed angle between a plane containing the axis of rotation of the rotary member.
With the aforesaid friction resistance generator, when the rotary member is rotated while applying a load toward the axial direction, respective rollers roll in contact with the rotary member and the passive member. Since the rollers roll along a track of rotation of the rotary member while being restricted by the cage to roll in a direction inclined by a prescribed angle to the track of rotation of the rotary member, frictional force commensurate with the load applied toward the axial direction occurs between the rollers and the rotary member, and between the rollers and the passive member. At this time, since the rollers slide w
REFERENCES:
patent: 3034365 (1962-05-01), Stieber
patent: 5125756 (1992-06-01), Bossler, Jr.
patent: 5230571 (1993-07-01), Estkowski et al.
Marmor Charles A
Waddell Tisha D.
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