摘要:
In a starter, the pinion, which is rotated by torque of an electric motor, is slid axially by the plunger of an electromagnetic switch and is pushed against the engine ring gear by a conically coiled compression coil, which allows employment of a small electromagnetic switch. Further, in an electromagnetic switch in which the plunger confronted coaxially with the stationary iron core slidably supporting a rod with a movable contact is moved towards the stationary iron core by electromagnetic force, a conically coiled spring is interposed between the plunger and the stationary iron core in such a manner that the spring is substantially coaxial with the plunger and the iron core, so that the playing of the rod is prevented.
摘要:
When, in a wire cut electric discharge machine, the wire electrode is broken during machining, it is automatically connected and returned to the wire electrode break point, and while the wire electrode is moved from the wire electrode break point to the machining start point, a cleaning material is jetted at the machined portion of the workpiece, thereby to allow the wire electrode to quickly return to the wire electrode break point.
摘要:
An engine starter apparatus comprising first and second noncircular gears, a pinion, and a starter motor. The pair of noncircular gears is interposed between a crankshaft and a ring gear of an engine, and when the speed of rotation of the first noncircular gear is kept constant, the second noncircular gear rotates the crankshaft while cyclically causing a change in the angular velocity due to its profile. Since the second noncircular gear is positioned so that the change in the angular velocity caused by its rotation can cancel a change in torque of the crankshaft, the change in the torque of the engine are not transmitted to the starter motor, thereby operating the starter motor at constant current at all times, providing such additional advantages as smaller and lighter starter motor design and reduced noise.
摘要:
An engine starter for an internal combustion engine having an engine ring gear, comprising a pinion gear (8) axially slidable on the rotary shaft (3) between an actuated position in which the pinion gear (8) engages the engine ring gear through the housing opening (6) and an inactuated position in which the pinion disengages from the ring gear. The starter conventionally also comprises a unidirectional clutch (14) for unidirectionally transmitting a rotation of the rotary shaft (3) to the pinion gear (8), and a solenoid switch (18) for energizing the motor (2) and driving the pinion (8) between the actuated and the inactuated positions. A first dust seal ring (22) having a forwardly extending lip (24) between the rotary shaft (3) and the pinion (8) seals therebetween against ingress of any foreign matter. To receive the seal ring (22), the pinion (8) may have an annular cavity (25) or groove so that the lip's inner edge slidably contacts the rotary shaft (3). A second dust seal ring (27) may be disposed between the housing (1) and a cylindrical outer surface of the pinion gear (8) or a unidirectional clutch (14). A third dust seal ring (30) may also be disposed at the front end of the rotary shaft (3) for protecting a bearing surface from dust.
摘要:
A direct current power supply device which generates an alarm signal when a power failure occurs in an alternating current power supply connected as an input to the device. A power failure detector circuit is connected at the input of the device and signals the failure of the AC power supply. In order to compensate for different time delays in the fall of the DC output due to varying loads at the output of the device, a reset signal generating circuit is used which is controllable in accordance with the size of the load. The circuit receives as an input, a signal identifying a power failure from the power failure detector circuit and a signal identifying the load current value from a load current value detector circuit, connected between the load and the AC/DC converter. The reset signal generating circuit, using analog or digital components, will generate a reset signal at a timing determined by the size of the load.
摘要:
In a starter motor, its electromagnetic switch has a movable contact cooperating with normally open contact member and normally closed contact member, and a part of a stationary contact in the normally closed contact member is formed into a locking piece to prevent the movable contact from contacting the passage formed in the cap of the switch, or the electromagnetic switch has a first movable contact cooperating with normally open contact member and a second movable contact cooperating with normally closed contact member, and an insulating partition wall is disposed between the first and second movable contacts, whereby the creeping distance between the normally open contact member and the normally closed contact member is increased as much, and the occurrence of current leakage is prevented.
摘要:
A brush device for rotary electric machine is comprised of an outer frame, a plurality of brush holding member for accommodating brushes, a first support member for supporting a connecting plate and a second support member for supporting a grommet. In the device, each of the brush holding member has a bottom portion which is provided integrally with the outer frame. Further, the first support member and the second support member are provided integrally with the outer frame.
摘要:
An engine starter where a pinion, which is engaged or disengaged with a ring gear of the engine to be started, is formed as an integral part of a drive shaft at an end of the drive shaft which is movable in the axial direction thereof while being rotated by an electric motor. The engine starter has no restriction of the root thickness of the pinion or the number of teeth of the pinion, and has a large gear ratio to the ring gear.
摘要:
A motor driven power steering apparatus comprising an electric motor for assisting steering, a torque sensor for detecting steering torque, a detecting means for detecting vehicle speed or rotation speed of an engine, a resistance for limiting electric current to be supplied to an electric motor, and a relay being connected in parallel to the resistance, opens the relay when the vehicle is running at a high speed, that is, the vehicle speed or rotation speed is larger than a predetermined value thereof, limits current to be supplied to the electric motor by the resistance, makes torque generated by the electric motor smaller in the case where anything unusual is created in the apparatus at a high speed running, and makes it easier for a driver to correct the steering operation or to avoid a danger.
摘要:
A vehicle AC generator control device includes an AC generator including a field coil; a rectifier for rectifying an AC output of the AC generator; a battery connected to an output terminal of the rectifier; a voltage regulator including a switching element series-connected to the field coil, the voltage regulator detecting a terminal voltage of the rectifier or battery to operate the switching element to control a field current of the field coil to adjust an output voltage of the generator to a predetermined value; a dummy load unit including a dummy load balanced with an output capacity of the AC generator; and an overvoltage limiter which detects when the output voltage of the AC generator exceeds a set value, to energize the dummy load unit, so that the dummy load unit is connected to an output terminal of the rectifier, to thereby suppress any abnormal rise of the output voltage.