Abstract: A compliant joint capable of achieving passive compliance for a robot in order to prevent an injury to a human by collision with the robot. The compliant joint includes a housing, a cam member rotatably mounted in the housing, a roller spring device mounted to the cam member to be compressed and extended, a guiding member formed in the housing to guide compression and extension of the roller spring device in accordance with rotation of the cam member, and a receiving recess formed at the guiding member to engage the housing and the cam member with each other by receiving the roller spring device and release the engagement by separating from the roller spring device. Accordingly, robustness of the robot can be maintained when an impact less than a predetermined magnitude is applied, while being suddenly decreased when an impact greater than the magnitude is applied.
April 28, 2008
Date of Patent:
September 20, 2011
Samsung Electronics Co., Ltd.
Young Bo Shim, Ja Woo Lee, Youn Baek Lee, Jeong Hun Kim, Kyung Shik Roh, Hyun Kyu Kim, Hyun Seok Yang, Dong Jun Hyun
Abstract: To realize the reduction of weight of a power transmission device by overcoming a drawback that an excessively large rotational torque is transmitted to a power transmission path and to sufficiently suppress the generation of a change of a rotational speed by overcoming a drawback that phases between one universal joint and another universal joint are displaced from each other. A damper mechanism is provide in the course of a power transmission path from an engine to a final reduction gear. The damper mechanism transmits a torque from the engine until the torque arrives at a predetermined value and prevents the transmission of a torque that exceeds the predetermined value.
Abstract: A control system for a vehicle having first and second wheels is provided that includes a differential apparatus adapted to distribute torque between the first and second wheels and a traction controller for controlling operation of the differential apparatus from vehicle launch up to a predetermined vehicle speed. The traction controller is configured to engage the differential apparatus in a first operating state according to at least one vehicle operating parameter indicative of a low traction operating condition and to further control engagement of the differential apparatus in a second vehicle operating state during the low traction operating condition according to a difference between an actual vehicle yaw rate and a predetermined target vehicle yaw rate. The control system also includes a stability controller for controlling engagement of the differential apparatus at or above the predetermined vehicle speed.
February 2, 2007
Date of Patent:
September 21, 2010
Damrongrit Piyabongkarn, Jae Y. Lew, John A. Grogg, Robert J. Kyle
Abstract: In order to increase an automatic connecting speed at a torque limiting coupling, a torque limiting coupling (1) with a longitudinal axis has a coupling hub (5) with circumferentially distributed apertures. Driving elements (8) are adjustably held in the apertures and extend parallel to the longitudinal axis. A coupling sleeve has first recesses (23) corresponding to the apertures. A switching disc (14) is rotatably arranged between a connected position, where the driving elements (8) engage the first recesses (23) for torque transmitting purposes, and a freewheeling position, relative to the coupling hub. The switching disc (14), if a predetermined nominal torque is exceeded, can be transferred by a rolling movement of the driving elements (8) from the connected position into the freewheeling position. The switching disc (14) has second recesses (34) that correspond to the apertures and engage the driving elements (8) in the freewheeling position.
Abstract: A power transmission system has a Neidhart structure in which a damper is shearing-deformed while being press-deformed when torque is applied to a pulley. The torque is transmitted from the pulley to a center hub by the reaction force in response to a vector component of the deformation of the damper, parallel to the pulley rotation direction, while a torque fluctuation is reduced by the deformation of the damper. Thereby, it is possible to set an elasticity modulus of the damper to be smaller. Therefore, it is possible to provide a compact power transmission system having a reduced torque fluctuation.
Abstract: An overload protection device for a manual hoist lever including a pressure hub, an outer hub, a brake nut, and a dowel pin. The pressure hub includes a radially extending flange and a cantilevered boss having a threaded outer surface with an axial groove. The outer hub includes a central opening, a tapered inner surface, and a flange contact surface which frictionally contacts the radially extending flange of the pressure hub. The brake nut is disposed in the central opening of the outer hub between the outer hub and the boss of the pressure hub, and includes a frusto-conical outer surface that frictionally contacts the tapered inner surface of the outer hub, as well as a threaded inner opening with a corresponding axial groove, the threaded inner opening being sized to threadingly engage the boss. The dowel pin is received within a receiving hole formed upon alignment of the axial groove of the boss and the corresponding axial groove of the brake nut.
Abstract: The medical/technical tool holder apparatus (2) with torque limitation comprises a receiver (5) for at least one shear body (7) and a shearing means (10a) which is rotatably connected to the receiver (5) and which is arranged in such a manner with respect to a shear body (7) located in the receiver (5) that the shearing means (10a) contacts the shear body (7) as soon as a torque acts on the shearing means (10a), with the shearing means (10a) and the shear body (7) being mutually matched and arranged in such a manner that the shearing means (10a) at least partly severs the shear body (7) when a specific torque is exceeded.
Abstract: A torque limiting clutch which transmits gradually increasing torque up to a prescribed limit at which limit the clutch disengages from its load. An embodiment designed for light service use in dentistry encloses all the working parts in a housing through which torque is applied to the load, and is autoclavable. This embodiment can be attached to known dental handpieces for assembling components of dental restorations with prescribed limited torque.
Abstract: A torque limiting clutch which transmits gradually increasing torque up to a prescribed limit at which limit the clutch disengages from its load. An embodiment designed for light service use in dentistry encloses all the working parts in a housing through which torque is applied to the load, and is autoclavable. This embodiment can be attached to known dental headpieces for assembling components of dental restorations with prescribed limited torque.
Abstract: A simplified wheel-lift mechanism is disclosed. The components of the wheel-lift mechanism are all formed of a plastic material that is corrosion resistant. Further, the wheel-lift mechanism includes a one-piece flexible coupling which reduces the complexity of the system over prior art systems. The one-piece flexible coupling includes a plurality of integrally molded discs connected by a plurality of circumferentially-spaced integrally molded posts. This results in a strong coupling which allows relative angular motion between the ends of the coupling. In a further feature of this invention, a locking key is operable to lock the wheel hub at a particular location. The locking key is selectively released to allow the wheel to be lowered. A unique drive mechanism is also included.
Abstract: A wheel-lift mechanism is disclosed which incorporates a unique torque limiting structure. A drive is transmitted to a first shaft, which is in turn transmitted to a second shaft. The second shaft drives a reel for raising and lowering a flexible lift member and an attached wheel hub from beneath a vehicle. The torque limiting structure consists of an outer drive member which has an inner periphery including a plurality of ears which are received within notches in an inner driven member. The first shaft rotates the outer drive member and the inner driven member in turn rotates the second shaft. Should the relative torque transmitted from the first shaft to the second shaft exceed a predetermined limit, the ears deform the notch radially inwardly and the outer drive member slips relative to the inner driven member. Nodes are positioned radially outwardly of the notches on each circumferential side. A space is formed radially inwardly of the notch in the inner driven member.
Abstract: A torque limiting drive coupling adapted to rotate a conveyor roller of an accumulating conveyor system comprises inner and outer cylindrical driving and driven surfaces rotatable about a common axis and providing a space therebetween extending entirely around said axis, which space may have a constant radial dimension, or a radial dimension that decreases in both circumferential directions from a maximum to a minimum. A torque transmitting roller of resiliently deformable elastomeric material is initially compressed within said space to engage said cylindrical surfaces in rolling a frictional torque transmitting relationship. The maximum torque that can be applied to rotate the driven surface, which is connected with a conveyor roller for rotation in unison therewith, is a function of the force required to deform the roller upon rotation of the driving surface when rotation of the conveyor roller and the connected driven surface is stopped by operation of the conveyor system.
Abstract: An overload clutch for a winch or the like offering a rolling or compression resistance between the rope drum and the rope drum power axle.The rope drum is connected at one flange to the power axle via an ancillary compensation member in the form of an inwardly running drum body or shaft. Placed between the rope drum and the ancillary compensation member are a plurality of rollers, made of an elastic material, and assembled together in the form of a roller cage. The rollers, which are oval in cross-section, are bonded to roller axles and are separated from each other by spacer rods. The interaction of the rollers with the rope drum and the ancillary compensation member is responsible for a non-positive driving connection between the rope drum and the power axle.
Abstract: An overload clutch is described which includes a drive member and a driven member which are coaxial and have concentric cylindrical surfaces which form an annular chamber. One or more rollers of elastomeric material are positioned in the chamber with the rollers in rolling contact with the concentric cylindrical surfaces. Teeth project into the annular chamber from both surfaces and engage the rollers from diametrically opposite positions to transmit torque from the drive to the driven member. Excessive torque causes the rollers to compress between the two engaging teeth, the roller passing between the teeth and allowing the drive member to rotate relative to the driven member.