Abstract: A power transmission device is provided, which includes a main-drive-wheel drive part, and an auxiliary-drive-wheel drive part having a power extraction part which has a transfer gear set comprised of a transfer drive gear connected to the main-drive-wheel drive part and a transfer driven gear meshing with the transfer drive gear and configured to transmit power to the auxiliary drive wheels. In a power transmission path from the main-drive-wheel drive part to the transfer drive gear, an input shaft connected to the main-drive-wheel drive part and a power transmission shaft connected to the transfer drive gear are coupled to each other in a radial direction through a first spline having a first backlash. A first shear damper without backlash and a second shear damper provided with a second spline having a second backlash smaller than the first backlash are provided between the input shaft and the power transmission shaft.

Abstract: An internal drum brake anti-falling device includes a carrier having an accommodating chamber and main shaft crossingly arranged in the accommodating chamber for supporting a rotating drum to autorotate, wherein the rotating drum has a life belt coiled thereon, a brake unit arranged at an end thereof, and a drum brake module, which comprises a base, mounted in the accommodating chamber, and a passive ring, mounted on the base. An outer diameter of the base defines a first ring surface configured in a concentric circle manner to the main shaft.

Abstract: A torque-transmitting apparatus for a drive assembly includes: a first coupling device for transmitting torque and compensating a shaft offset, and a second coupling device for transmitting and limiting torque, the first and second coupling devices being connected in series. The second coupling device includes an inner hollow part and an outer hollow part. The inner hollow part radially outwardly includes a first frictional surface and the outer hollow part radially inwardly includes a second frictional surface, which is connected to the first frictional surface and interacts therewith. The inner hollow part includes a fillable pressure chamber.

Abstract: A machine to apply tape to a surface includes a handle for manipulation by a user connected to a wheeled applicator allowing the tape to be dispensed from the applicator and rolled onto a surface. The applicator includes two sidewalls adjustable relative to each other on guide bars to define space therebetween where rolls of tape having different widths can be accommodated. The sidewalls further include bottom portions shaped complimentarily with the wheel to define a path sized for a width of the tape around the wheel, and where the sidewalls further define a path sized for the width of the tape over at least one guide bar. The applicator also may include a clutched take-up reel operatively connected to the wheel, where rotation of the wheel causes the take-up reel to rotate and collect a liner.

Abstract: A torque assembly including an inner member; an outer member; a first torque member disposed between the inner member and the outer member; and a second torque member disposed radially exterior or interior to the first torque member; where upon rotation in a first circumferential direction, the first torque member is allowed to generally freely rotate and in a second circumferential direction, the first torque member is radially shifted to impede or prevent rotation, and where the second torque member provides a circumferential slip interface between the inner member and the outer member to allow rotation in the second circumferential direction.

Abstract: A ring rolling device for enlarging a ring blank includes a press element, a rotatably mounted mandrel and an advancing arrangement in which the mandrel is rotatably mounted with a first end part in a first rolling bearing and with a second end part in a second rolling bearing. The ring blank can be mounted around the mandrel. By means of the advancing arrangement, the mandrel is movable towards the press element and away from the latter again, wherein a roll gap which decreases in size, and in which the ring blank is rolled, is formed between the mandrel and the press element. The two rolling bearings are arranged axially fixed in the advancing arrangement, and the mandrel is mounted so as to be axially movable relative to these two rolling bearings.

Abstract: A timepiece wheel set, including an arbor including a housing for reception of a plate and including, on either side of the housing, an axial abutment surface maintained in abutment on the plate, which includes a radially resilient arm and a second arm forming together a clamp clamping a radial bearing surface of the arbor in proximity to the axial abutment surface. The arbor further includes an entry ramp arranged to push back radially the first resilient arm and the second resilient arm, to allow the plate to be placed on the arbor.

Abstract: A magnetic clutch pump arrangement is provided. The pump arrangement includes a pump housing containing an impeller shaft, a containment shell sealing an enclosed chamber within the housing, an impeller mounted on the impeller shaft, an inner rotor mounted on the other end of the impeller shaft, a drive motor, a drive shaft drivable by the drive motor, and an outer rotor outside of the enclosed chamber, mounted on the drive shaft, which magnetically interacts with the inner rotor. The external rotor has a hub with a through-bore having an interior surface which includes an axial groove extending parallel to the axis of rotation which cooperates with a feather key and a drive shaft key groove to rotationally secure the hub to the drive shaft. At least one radially circumferential first groove and at least one radially circumferential second groove in the hub interior surface receive tolerance rings.

Abstract: An oven for performing a rotisserie cooking operation includes an oven cavity having a door for selectively accessing the oven cavity, at least one heating element for heating the oven cavity and a rotisserie arm adapted to support a food product within the oven cavity. A motor is operatively coupled to the rotisserie arm for rotating the rotisserie arm and a food product. The oven also includes a control interface having a rotisserie cooking mode input and a control system for controlling the rotisserie motor and the heating element. In addition to other functions, the control system automatically causes the rotisserie motor to cycle on and off to allow for intermittent rotation of the food product supported on the rotisserie arm when the oven door is opened.

Abstract: A power transfer unit for transferring power from a front wheel side to a rear wheel side comprises: a hollow transfer input shaft which is coupled to an engine and through which a right-side front-wheel axle is penetrated; a transfer output shaft disposed to extend in a direction orthogonal to the transfer input shaft; a transfer drive gear provided on an outer periphery of the transfer input shaft; and a transfer driven gear provided on an outer periphery of the transfer output shaft and meshed with the transfer drive gear. It further comprises a damper mechanism configured to absorb a fluctuation in torque input from an engine side into the transfer input shaft. The damper mechanism is disposed such that an intermediate portion and a left end-side portion thereof overlap the transfer driven gear in an extension direction of the transfer output shaft, in top plan view.

Abstract: A power transmission device includes a pulley constituting a driving-side rotor, an inner hub, a washer and a limiter which constitute a driven-side rotor, and a plate configured as a linking elastic member that connects the driving-side rotor and the driven-side rotor. A flat spring that elastically deforms in a direction along a rotation shaft is adopted as the plate. A distance in an axial direction between a pulley-side attachment portion of the plate which is attached to the pulley and a hub-side attachment portion of the plate which is attached to the inner hub is adjusted to fall within a predetermined standard range by interposing a shim as an adjustment member between the plate and the pulley.

Abstract: A transmission can include a first gear, a shaft, a second gear, a third gear and a first biasing member. The first gear can be disposed about a first rotational axis. The shaft can be disposed about a second rotational axis. The second gear can be fixedly coupled to the shaft and can be configured to meshingly engage the first gear. The third gear can be non-rotatably coupled to the shaft. The third gear can be axially slidable along the shaft and can be configured to meshingly engage the first gear. The first biasing member can bias the third gear axially away from the second gear and into engagement with the first gear.

Abstract: An encoder includes a first rotator connectable to a rotating shaft and including a first pattern, and a first detection unit positioned at a non-rotatory member and configured to detect the first pattern. The encoder also includes a second rotator connectable to an output shaft that is rotatable around a predetermined axis and is configured to output rotation caused by the rotating shaft. The encoder also includes a second detection unit positioned at the non-rotatory member and configured to detect the second pattern, and a reference unit configured to position the first detection unit and the second detection unit by a common position reference.

Abstract: A torque limiter includes a shaft member, and a cylindrical member which is fitted rotatably on the shaft member. When the cylindrical member is rotated relative to the shaft member in such a state that the cap member is not screwed in the threaded hole and in such a state that the oil release passage is not opened to the outside, the other end portion of the oil release passage circumferentially moves within the circumferentially extended groove while being spaced apart from the circumferentially extended groove.

Abstract: A steering gear clutch includes a housing and an input shaft rotatably supported by the housing. An output shaft operatively connected with a steering gear is rotatably supported by the housing. The output shaft is rotatable relative to the input shaft. The input shaft rotates together with the output shaft relative to the housing when a torque below a predetermined value is applied to the input shaft. The input shaft rotates relative to the output shaft and the housing when a torque above the predetermined value is applied to the input shaft. The input shaft may rotate relative to a shaft portion of the output shaft and the housing through a predetermined angle. The input shaft and the shaft portion may rotate together relative to the housing when the input shaft has rotated through the predetermined angle.

Abstract: A vehicular torque limiter having a first shaft including connecting means complementary to connecting means of an end of an axle-shaft of the vehicle, a second shaft connectable to a hub assembly of a wheel of the vehicle by bolts of the wheel which are accessible, torque limiting elements, for limiting torque between the first and second shafts, thereby a drive member of the wheel which directly connects the axle-shaft to the hub assembly, is replaceable with the torque limiter, thereby providing a universal, easy to install torque limiter designed for vehicles.

Abstract: A clutch mechanism for a tape dispenser, for example, includes a first reel, a second reel, a biasing element, and a friction element. The first and second reels are rotatably disposed on first and second shafts. The biasing element is disposed between the second reel and second shaft such that the second reel is movable in a radial direction between first and second positions relative to the second shaft and the biasing element biases the second reel into the first position. The friction element extends around the first and second reels and arranged to generate a first normal force acting on the second reel when the second reel is in a first position, relative to the second shaft, and a second normal force acting on the second reel when the second reel is in a second position, relative to the second shaft.

Abstract: A drive unit is provided. The drive unit forms a power transmitting path that includes a driving shaft between a wheel/tire assembly and a driving power source provided separately for each wheel/tire assembly, and transmits power via the driving shaft. The drive unit has a weak portion, which is less durable than any other portion in the power transmitting path with respect to external force applied to the wheel/tire assembly, formed on the driving shaft.

Abstract: A power transmission device which transmits power between a first member and a second member, the first member has a hollow portion, the first member and the second member are fitted to each other by interference fitting by setting the external diameter of the second member so as to have a slightly larger size than the internal diameter of the hollow portion of the first member, and the surface of at least one of an inner periphery of the hollow portion of the first member and an outer periphery of the second member is subjected to a surface treatment in which slipping occurs when an excessive torque exceeding a predetermined value is applied, and the slipping stops and the original torque transmission to be performed in the power transmission device is performed again between the first member and the second member when the excessive torque is eliminated.

Abstract: A clutch mechanism for a tape dispenser, for example, includes a first reel, a second reel, a biasing element, and a friction element. The first and second reels are rotatably disposed on first and second shafts. The biasing element is disposed between the second reel and second shaft such that the second reel is movable in a radial direction between first and second positions relative to the second shaft and the biasing element biases the second reel into the first position. The friction element extends around the first and second reels and arranged to generate a first normal force acting on the second reel when the second reel is in a first position, relative to the second shaft, and a second normal force acting on the second reel when the second reel is in a second position, relative to the second shaft.

Abstract: A torque limiter in which an area of a region where an inner face of a circumferentially extending chamber intersects an oil pressure expanding chamber in an extended plane extended toward the oil pressure expanding chamber is larger than a sectional area of an opening of an oil removing hole which is opened to the circumferentially extending chamber.

Abstract: A motorized spindle drive for an actuator, particularly for an aerodynamically effective surface of an aircraft, may have a spindle and a motor that comprises a mechanical transmission element engaging the spindle in order to drive said spindle and causing a relative movement in the axial direction between the spindle and the motor and that is connected to an element that is fixed in place relative to the motion of the spindle, said element absorbing the torque of the motor. According to the invention, the bearing absorbing the torque of the motor comprises a detachable coupling that detaches upon a predetermined torque being exceeded and releases the motor in the sense of a free movement in the axial direction of the spindle relative to the fixed element.

Abstract: Disclosed is a slip gear structure which is easy to handle at the time of dismantling/assembly and which does not easily suffer breakage even if dismantling/assembly is repeated, and a timepiece equipped with the same. A slip gear structure for a timepiece includes: a gear main body portion in the form of an annular plate having in the outer periphery thereof tooth portions, there being provided spring portions extending across an inner opening; and a positioning member equipped with a small diameter plate-like portion having a central hole with which a shaft is rotatably fit-engaged and a pair of support wall portions arranged on both sides of the central hole and protruding from one surface.

Abstract: A transmission device includes a first transmission mechanism comprising a first rotatable member and a first transmission member fixed to the first rotatable member for rotating together with the first rotatable member; and a second transmission mechanism comprising a second rotatable member and a second transmission member fixed to the second rotatable member for rotating together with the second rotatable member. The second transmission member received in the first transmission member, and the second transmission member being magnetically connected with the first transmission member. When a load applied to the first transmission mechanism is less than a predetermined value of the first transmission mechanism, the first transmission member rotates together with the second transmission member by a magnetic force generated therebetween, which in turn makes the first transmission mechanism rotates with the second transmission mechanism together.

Abstract: An ejection device for a furniture part mounted movably in or on a furniture body includes an ejector, a drive unit, and a friction clutch. The friction clutch is designed in such a manner that it decouples the drive unit and the ejector from each other when a predetermined torque is exceeded. The friction clutch includes two parts which are rotatable in relation to each other with respect to two directions of rotation. A spring is provided which interacts with the two parts in such a manner that the torque at which the decoupling takes place differs for the two directions of rotation of the two parts.

Abstract: An overload protection device includes a motor, a rotatable shaft, a driven wheel, and a transmission mechanism. The rotatable shaft is meshed with the motor. The rotatable shaft includes a rod and a driving arm. A connection pole is formed on the driving arm. An inner surface of the driven wheel forms a protrusion. A sidewall of the protrusion defines a cutout therein. The transmission mechanism includes a resilient member and two arms rotatably connected on the connecting pole. The transmission mechanism is wedged in the cutout. when the motor is overloaded, the torque applied on the arms by the drive force of the motor becomes greater than the torque applied on the arms by the resilient force of the resilient member, the resilient member can no longer hold the transmission mechanism in a wedge shape, the arms become parallel each other to slide out of the cutout.

Abstract: An ejection device for a furniture part mounted movably in or on a furniture body includes an ejector, a drive unit, and a friction clutch. The friction clutch is designed in such a manner that it decouples the drive unit and the ejector from each other when a predetermined torque is exceeded. The friction clutch includes two parts which are rotatable in relation to each other with respect to two directions of rotation. A spring is provided which interacts with the two parts in such a manner that the torque at which the decoupling takes place differs for the two directions of rotation of the two parts.

Abstract: The invention relates to a protection device for a motor spindle (1) arranged in a housing (2), particularly of a machine tool, having an inner ring (6) fixedly joined to the motor spindle (1) and an outer ring joined to the housing (2). The inner ring (6) is arranged in the outer ring (7) in a way permitting axial motion and a tilting motion, and is placed under elastically resilient preload against the outer ring (7) by means of preloading members (8).

Abstract: A shear gear arrangement with gear teeth on the bearing liner positioned to engage complementary teeth on a shear gear main body. The bearing liner is static, while the shear gear main body mounts on the rotating drive shaft. If a failure occurs, the drive shaft displacement causes the shear gear main body gear teeth to engage the bearing liner teeth, instantaneously loading the shear section of the shaft with a sufficient torque load to shear the section as designed.

Abstract: A high-precision torque limiting mechanism capable of limiting an output torque to a magnitude of not more than a prescribed value, as well as to reduce a frictional torque produced upon occurrence of a slip. To accomplish this object, a ball ramp section (13) is attached to a slip clutch section (3) for reducing friction between friction plates (31) and (32) forming the slip clutch section (3) and limiting a torque to be transmitted by utilizing an axial thrust produced at the ball ramp section (13) in accordance with the magnitude of an input torque. The precision with which the torque to be transmitted is limited is enhanced by making improvements to the shape of an internal side surface of a recess (G) formed in each of cam elements (131) and (132) of the ball ramp section (13).

Abstract: An automatic opening-closing device, especially for a cover or seat of a toilet, has a motor having a motor shaft, a speed reducer connected to the motor shaft, a planetary gearbox driven by the speed reducer, an output axle for driving the cover between an open position and a closed position. A protection device limits the torque between the output axle and an output shaft of the planetary gearbox.

Abstract: A joint assembly for releasably securing a first and a second segment of an associated modular limb is provided. The joint assembly includes a male connector including a base and a load bearing blade secured to the base of the male connector protruding therefrom. The male connector is adapted to be secured to one of the first and second segments of the associated modular limb. A female connector is provided and includes a base and a load bearing socket secured to the base of the female connector. The socket is configured to selectively receive the blade of the male connector. The female connector is adapted to be secured to the other of the first and second segments of the associated modular limb. A locking member selectively retains the blade of the male connector in the socket of the female connector. The male connector, the female connector, and the locking member cooperate to form a resilient and selectively releasable modular limb joint.

Abstract: A frictional clutch for a hand-held device for transferring a film from a backing tape onto a substrate comprises a first main member having a cylindrical element coaxially protruding into a circular center opening of a second main member. The first and second main member are supported such that they can carry out a relative rotational movement. The second main member include coaxial tensioning elements for holding and pre-tensioning an elastic ring guided around the tensioning elements. The tensioning elements are geometrically arranged such that the ring is exposed in the form of at least one secant-shaped leg in the center opening. The secant-shaped leg of the ring is biased radially outwards when the cylindrical element of the first main member is inserted into the center opening of the second member in order to produce a frictional force between the ring and the circumferential wall of the cylindrical element.

Abstract: A torque fluctuation absorbing apparatus includes a first plate member, a second plate member rotatable relative to the first plate member, and a first friction member disposed between the first plate member and the second plate member and pressed against the first plate member in a slidable manner. The second plate member includes a first retaining surface that makes contact with the first friction member. The first friction member includes a plurality of grooves at a surface facing the first retaining surface of the second plate member, the grooves extending in a radial direction of the first friction member.

Abstract: Disclosed is a slip gear structure which is easy to handle at the time of dismantling/assembly and which does not easily suffer breakage even if dismantling/assembly is repeated, and a timepiece equipped with the same. A slip gear structure for a timepiece includes: a gear main body portion in the form of an annular plate having in the outer periphery thereof tooth portions, there being provided spring portions extending across an inner opening; and a positioning member equipped with a small diameter plate-like portion having a central hole with which a shaft is rotatably fit-engaged and a pair of support wall portions arranged on both sides of the central hole and protruding from one surface.

Abstract: A reactor plate connected to a flywheel; a resilient element connected to a plate for a damper assembly; and first and second friction elements. The resilient element urges the first and second friction elements into engagement with the flywheel and the reactor plate, respectively, to rotationally lock the resilient element, the flywheel, and the plate for a torque on the flywheel less than a first value. In one embodiment, at least one of the first or second friction elements is fixedly secured to the reactor plate or the flywheel, respectively. In one embodiment, at least one of the first or second friction elements is fixedly secured to the resilient element.

Abstract: An overload protection device includes a motor, a rotatable shaft, a driven wheel, and a transmission mechanism. The rotatable shaft is meshed with the motor. The rotatable shaft includes a rod and a driving arm. A connection pole is formed on the driving arm. An inner surface of the driven wheel forms a protrusion. A sidewall of the protrusion defines a cutout therein. The transmission mechanism includes a resilient member and two arms rotatably connected on the connecting pole. The transmission mechanism is wedged in the cutout. when the motor is overloaded, the torque applied on the arms by the drive force of the motor becomes greater than the torque applied on the arms by the resilient force of the resilient member, the resilient member can no longer hold the transmission mechanism in a wedge shape, the arms become parallel each other to slide out of the cutout.

Abstract: A plastic slip clutch for an adjustable drive in an automobile includes a hub (3) which exhibits an inner profile (4), and a shaft (1) which exhibits an outer profile (2). For the purpose of transmitting torque, the shaft with the outer profile is introduced into the inner profile of the hub in form-fitting and force-fitting fashion. The inner profile (4) of the hub (3) exhibits plastic elements (5) for the transmission of force, such that the plastic elements (5) become elastically deformed under the effect of a force exceeding a given threshold force and thereby permit the outer profile (2) of the shaft (1) to slip through inside of the hub (3).

Abstract: A power transmission device includes: a pulley 1 rotatably attached to a casing 9; a hub 2 connected to the pulley 1 by an engagement of protrusions with recesses; and a power shutoff member 3 interposed between the hub 2 and a rotary shaft 4. The power shutoff member and the rotary shaft 4 are joined to each other by means of screwing. When a water intrusion path formed between a hub side seating face of the hub and a shaft side seating face 44 of the rotary shaft is formed into a labyrinth structure, water is prevented from entering the seating face. An engagement portion 35 on the power shutoff member side is engaged with a hub side engagement portion 21a so that it can be accommodated in the hub side engagement portion 21a, and the power shutoff member can be rotated together when the hub is rotated. An engagement gap formed between a power shutoff member side engagement portion and a hub side engagement portion in the radial direction perpendicular to an axis of the rotary shaft is in a range from 0.

Abstract: The invention relates to a motorized spindle drive for an actuator, particularly for an aerodynamically effective surface of an aircraft, having a spindle and a motor that comprises a mechanical transmission element engaging the spindle in order to drive said spindle and causing a relative movement in the axial direction between the spindle and the motor and that is connected to an element that is fixed in place relative to the motion of the spindle, said element absorbing the torque of the motor. According to the invention, the bearing absorbing the torque of the motor comprises a detachable coupling that detaches upon a predetermined torque being exceeded and releases the motor in the sense of a free movement in the axial direction of the spindle relative to the fixed element.

Abstract: An apparatus is shown which comprises first and second mating components with a force limiter located between them. The force limiter includes a band of resilient material, with protrusions therealong, and a slip element. The band and the slip element are secured to the first mating component with the band arranged to apply a radial force against the slip element so as to press it against the second mating component. The frictional force between slip element and the second mating component is insufficient to separate the slip element and the band from the first mating component, so any slipping that occurs between the mating components happens at the boundary of the slip element and the second mating component. A desired slip force can be obtained by choosing a slip element with an appropriate coefficient of friction, rather than by varying the dimensions of the components.

Abstract: Mounting rings and methods for mounting structures to shafts are provided. The rings and methods may be used to mount other rings or housings to a shaft. The rings are characterized by having flexible inner diameters that can deflect under a radial load. The radial deflection of the inner diameter permits the rings to deflect and engage an outer diameter of a shaft. The engagement of the rings with a shaft provides at least some resistance to movement, for example, rotation and/or axial displacement, of the shaft relative to the ring and structure. In one aspect, the ring has a closed, hollow, construction, for example, a circular, oval, or polygonal closed, hollow construction. The ring may include a plurality of indentations, such as slots, on the inside diameter of the ring that may relieve at least some of the circumferential stress in the ring. Methods for using the rings to mount a structure to a shaft are also disclosed.

Abstract: An overload clutch device for a power tool includes an electric motor used to rotatably drive an insertion tool (12), the overload clutch device being provided with a first and second corresponding clutch means (22, 26). The first clutch means (26) is fixed to an output shaft (20) in a force-dependent manner.

Abstract: The invention is disclosed by that a high shift transmission pulley train is installed between the input shaft and the output shaft of the continuous variable transmission device, and a clutching device is installed between the output shaft and the driven pulley of the high shift transmission pulley train as well as that a low shift transmission pulley train matching with an unidirectional transmission device is installed between the input shaft and the output shaft of the continuous variable transmission device.

Abstract: A power transmission for a compressor includes a driven member rotable by an engine. The power transmission includes a drive member rotable coaxially with the driven member to rotate a shaft of a compressor for regulating displacement of the compressor. The power transmission includes a link interconnecting the driven member and the drive member with each other in a crossing direction relative to the drive shaft. The link is disengageable from one member of the driven member and the drive member.

Abstract: A power transmission apparatus (10) includes a rotary portion (1) to which turning driving force from a driving source is transmitted and which can rotate, a power cutoff member (3) mechanically connected to the rotary portion (1) and one of the ends of a rotary shaft (5) of a driven apparatus and cutting off transmission of excessive torque between them, and a cap (4) connected to the end of the rotary shaft (5) on one hand and fastened by screw meshing to the power cutoff member (3) on the other hand, and transmitting power from the power cutoff member (3) to the rotary shaft (5). The rotary portion (1), the power cutoff member (3), the cap (4) and the rotary shaft (5) all rotate integrally with one another. The cap (4) has a flange portion (4h) protruding in a radial direction with respect to an axis of the rotary shaft (5) and supporting an axial force.

Abstract: A disengageable arrangement for connecting a windscreen-wiper arm to a drive shaft driven in rotation about its longitudinal axis has a device solidly attached to the arm and providing the connection of the arm, and the drive shaft in the normal operating position of the windscreen wiper. The device is deformable under an effect of a torque applied to the arm greater than that exerted by said drive shaft, and is capable of being placed back in the normal operating position by locked relative positioning of the arm and the drive shaft. There is a single locked relative position of the arm and the drive shaft. The deformable device has at least two stacked elastic blades. The ends of each stacked elastic blade solidly are attached to the arm. Each of the at least two stacked elastic blades has a locking part inserted in a stopping part solidly attached to the drive shaft.

Abstract: A power transmission apparatus including a pulley and a hub coupled to the pulley is disclosed. An internally threaded portion formed in a hub center hole is screwed with an externally threaded portion of a rotary shaft thereby to couple the pulley to the rotary shaft. The apparatus further includes a seal member for sealing the hub center hole. The seal member includes a fixed portion having a fitting hole fitted on the forward end portion of the rotary shaft and a flange portion extending in radial direction and adapted to form a contact seal portion surrounding the hub center hole with the hub.

Abstract: A power transmission device 41, in which a spacer 69 is press-fitted around a rear side of a male thread section 63 of an input shaft 57. An adapter 83 is screwed to the male thread section 63 of the input shaft 57 and its large diameter section 89 abuts against a large diameter section 77 of the spacer 69. A hub 99 abuts against a front side of the large diameter section 89 of the adapter 83. A power interruption member 113 has a flange section 119 abutting against the hub 99, and a tubular section 117 screwed to an outer circumference of the adapter 83. It is configured so that a friction coefficient ?w1 between the large diameter section 89 of the adapter 83 and an inner circumference of the hub 99 is smaller than a friction coefficient ?w2 between the large diameter section 89 of the adapter 83 and the large diameter section 77 of the spacer 69.

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.