摘要:
An alternator for use in an automobile includes brackets for supporting a rotation shaft at both sides of a rotor, being thermally connected to a stator for supporting the stator, while one side of the rotor is closed by a bracket. A cooling water passage is provided in the bracket, a cooling fan is provided on the closed side of the rotor, and a cooling fin provided opposing to the cooling fan and in vicinity of the cooling water passage, thereby enabling cool down of the stator and the rotor, effectively, with low noises, and thereby obtaining a high power output.
摘要:
An alternator for vehicles, provided with a stator, a rotor, a rectifier and a voltage regulator, and comprising turbulent flow generating members 22 provided on heat transfer surfaces, through which heat generated from a field coil is transferred to a side of a bracket from a rotor, to generate convection of an air and turbulence of flow on downstream regions of recesses and projections, whereby a heat transfer performance from the rotor to the bracket is enhanced with a rotational frequency of the rotor.
摘要:
An automotive alternator comprises: a stator provided with a stator coil; a rotor supported for rotation in the stator to apply an alternative magnetic field to the stator; a regulator for regulating output; a rectifier for rectifying generated current; a plurality of housings holding the stator and the rotor; and a coolant path through which a coolant flows through at least one of the plurality of housings to transfer heat generated in the stator coil outside the automotive alternator. Fastening devices formed of a material having good heat conductance fasten the regulator and a heatsink for the regulator together to the housing at a position apart from the housing to transfer heat generated by the regulator to the housing. Thus, the automotive alternator can maintain a stable cooling ability in a hot atmosphere for a long time.
摘要:
A dog clutch mechanism for use as a clutch for switching drive power in a four-wheel-drive vehicle has a case, first and second rotatable shafts rotatably supported coaxially in the case for transmitting a relative torque between front and rear wheels of the vehicle, and a dog clutch comprising a dog piece having first dog teeth and fixedly mounted on the first rotatably shaft and a hub having second dog teeth capable of axially meshing with the first dog teeth and axially slidably mounted on the second rotatable shaft. The dog clutch is selectively engageable for transmitting the relative torque between the first and second rotatable shafts. The first and second dog teeth having respective meshing tapered surfaces for producing thrust forces acting on the hub and tending to move the hub in a direction away from the dog piece when the vehicle is braked while a relative forward torque is being transmitted between the first and second rotatable shafts through the dog clutch.
摘要:
A dog clutch mechanism includes a case, first and second rotatable shafts rotatably disposed coaxially in the case, the second rotatable shaft having an annular groove defined in an outer periphery thereof, a dog piece fixedly mounted on the first rotatable shaft and having first dog teeth confronting an end of the second rotatable shaft, a hub axially slidably mounted on the second rotatable shaft and having second dog teeth meshingly engageable with the first dog teeth, the second dog teeth being movable out of meshing engagement with the first dog teeth under a thrust force in response to relative torque transmission between the first and second rotatable shafts. The hub has guide holes extending radially therethrough toward the second rotatable shaft and a plurality of balls are retained respectively in the guide holes are and engageable in the annular groove. A sleeve is axially slidably disposed on an outer periphery of the hub for engaging the balls and pressing the balls into at least the annular groove.
摘要:
An electronically controlled transmission in which a shift actuator for driving a sleeve of a roller synchro mechanism and a throttle actuator for an engine are electronically controlled. The shift actuator is comprised of a drum type actuator of a simple structure comprising a shift drum and a shift fork. The use of the roller synchro mechanism ensures that only a small driving force for the shift drum is required, which makes it possible to provide a reduction in size of the shift actuator. In addition, a shift lever for operating a shift switch for producing the shifting instruction signal is mounted on either left or right side of the steering wheel. This ensures that the shifting-up and shifting-down signals can be produced by one of the driver's hands, leading to an improvement in operability of the shift lever.
摘要:
A retainer retaining a plurality of rollers therein so as to permit their slight movement in a radial direction is disposed between cam grooves provided on the outer periphery of an inner cam secured to a rotary shaft and a roller abutment surface formed on the inner periphery of a gear relatively rotatably carried on the rotary shaft, and a dowel-admission groove is defined in a side of the retainer. A dowel provided in a sleeve can enter the dowel-admission groove. The groove is defined between the adjacent rollers retained in the retainer, or at least part of the inner cam, the rollers and the retainer are disposed in a recess made in the gear, thereby achieving a reduction in axial dimension of a roller synchro mechanism. In addition, the retainer is comprised of two components: a body portion and a cover plate, thereby facilitating their machining, and a slide contact portion is formed on the outer periphery of the body portion and is tightly fitted to the roller abutment surface of the gear, so that the retainer may be dragged by the gear, thereby providing a prompt engagement of the rotary shaft with the gear.
摘要:
A torque transmitting device includes a rotatable case having defined therein a fluid chamber extending axially and filled with a fluid, a rotatable shaft disposed coaxially in the fluid chamber and rotatable with respect to the case, a plurality of outer plates and inner plates disposed coaxially in the fluid chamber for relative torque transmission between the rotatable case and the rotatable shaft through the fluid, the outer plates having outer peripheries engageable with an inner peripheral surface of the rotatable case for rotation with the rotatable case, the inner plates having inner peripheries engageable with an outer peripheral surface of the rotatable shaft for rotation with the rotatable shaft, and members disposed between the inner peripheral surface of the rotatable case and the outer peripheries of the outer plates or between the outer peripheral surface of the rotatable shaft and the inner peripheries of the inner plates for holding the rotatable case and the rotatable shaft in engagement with each other while allowing them to be angularly shifted through a predetermined angle.
摘要:
A viscous coupling has a casing having a fluid chamber defined therein, and a plurality of first plates and a plurality of second plates, the first and second plates being rotatable about a common axis and disposed in the fluid chamber. The first and second plates drivingly interconnect the casing and at leest one rotatable member. A viscous fluid introduced into the fluid chamber through an inlet port defined in one end wall of the casing flows circumferentially in and along an annular groove defined in an inner surface of the end wall. Each of the first and second plates has a plurality of holes defined therein and spaced circumferentially thereof. The viscous fluid flows through these holes into spaces between adjacent ones of the first and second plates. The other end wall of the casing has an air vent hole defined therein which allows air to escape from the fluid chamber when the viscous fluid is charged into the fluid chamber.
摘要:
A rotor 2 comprises of a pair of claw shape magnetic poles 3N and 3S and plural permanent magnets 5. The permanent magnet 5 is arranged between claw portions of the claw shape magnetic poles 3N and 3S. A permanent magnet fly-out prevention member 61 is arranged at an outer periphery of the claw shape magnetic poles 3N and 3S and prevents the fly-out of the permanent magnet 5 when the rotor 2 rotates. A permanent magnet holding member 62 holds the permanent magnet 5 from an inner periphery side. In a construction in which the permanent magnet fly-out prevention member 61 is arranged between the claw portions of the claw shape magnetic poles 3N and 3S, the working operation for arranging the permanent magnet 5 between the claw portions of the claw shape magnetic poles 3N and 3S can be improved, thereby a vehicle use AC generator having an improved electric power generation efficiency can be provided.