Abstract: A permanent magnet type rotating machine comprises a cylindrical yoke; a plurality of permanent magnets installed on an inner periphery of the cylindrical yoke; a rotor rotatably installed at an inner peripheral portion of the plurality of permanent magnets; and a retaining portion provided at a conventional constituent member of the permanent magnet type rotating machine to elastically retain the plurality of permanent magnets in an axial direction.

Abstract: A permanent magnet type rotating machine comprises a cylindrical yoke; a plurality of permanent magnets installed on an inner periphery of the cylindrical yoke; a rotor rotatably installed at an inner peripheral portion of the plurality of permanent magnets; and a retaining portion provided at a conventional constituent member of the permanent magnet type rotating machine to elastically retain the plurality of permanent magnets in an axial direction.

Abstract: A permanent magnet type rotating machine comprises a cylindrical yoke; a plurality of permanent magnets installed on an inner periphery of the cylindrical yoke; a rotor rotatably installed at an inner peripheral portion of the plurality of permanent magnets; and a retaining portion provided at a conventional constituent member of the permanent magnet type rotating machine to elastically retain the plurality of permanent magnets in an axial direction.

Abstract: The end of a lead wire of a DC motor composed of twisted wires is formed into a flat shape by welding the twisted wires together, and is inserted or installed through a grommet with the smaller or shorter dimension of the flat shape oriented in the axial direction of the motor.

Abstract: A starting motor with an intermediate gear wherein rotation of a rotating shaft of a DC motor is transmitted to a pinion in a one-way rotational direction by an overrunning clutch, and an intermediate gear supported rotatably and forward-and-backward slidably by an intermediate shaft retained by a front bracket through a bearing and in mesh with the pinion, meshes with a ring-gear of an internal combustion engine by a forward movement thereof thereby starting the internal combustion engine, characterized by that; a storage for a lubricant is provided at a middle portion of the intermediate gear in the axial direction, which is fixed to an inner diameter portion of the intermediate gear; and dust seals are provided in a bearing with metal back supported by the intermediate shaft and at both ends of the inner diameter portion of the intermediate gear.

Abstract: A starting motor with an intermediate gear wherein rotation of a rotating shaft of a DC motor is transmitted to a pinion in a one-way rotational direction by an overrunning clutch, and an intermediate gear supported rotatably and forward-and-backward slidably by an intermediate shaft retained by insertion holes in a front end portion and a first back end portion of a front bracket and in mesh with the pinion, meshes with a ring-gear of an internal combustion engine by a forward movement thereof thereby starting the internal combustion engine, characterized by that; a polygonal hole is provided at a second back end portion of the front bracket communicating to the insertion hole in the first back end portion thereof; a spacer composed of a metallic material or a synthetic resin material, a section of which is a polygon, is inserted into the polygonal hole and fixed thereto blocking rotation thereof; a back end of the spacer is received by a front end of a yoke of the starting motor contacting the front end of

Abstract: A starter motor with an intermediate gear wheel. The starter motor includes an interposition member interposed between the front end of a clutch cover fitted onto an overrunning clutch and the rear end of an intermediate gear wheel, a movable connecting member including a boss portion which is loosely fitted onto the outer circumference of an extended boss portion projecting backwardly from the rear end portion of the intermediate gear wheel, and a circular-arc-shaped fitting portion which is formed integrally with the rear end portion of the boss portion to extend upwardly and which is fitted to a lower half portion of a fitting groove formed at the rear end portion of the overrunning clutch so as to be movable in the axial direction of the clutch.

Abstract: In order to provide a starter motor with an intermediate gear which can secure a good engaging performance for a pinion, an intermediate gear and a ring gear to thereby eliminate the strange sound of the intermediate gear and to reduce the wear of a bearing of the intermediate gear as well as the wear of the teeth of the pinion and intermediate gear, according to the invention, there is provided a starter motor with an intermediate gear in which the shift coefficient of a pinion is set smaller than the shift coefficient of the intermediate gear to thereby reduce a difference between two kinds of engagement pressure angles respectively obtained between the pinion and intermediate gear as well as between the intermediate gear and a ring gear.

Abstract: An electromagnetic switch apparatus incorporating a pair of stationary contacts and a movable contact at the rear end of a magnetic path core, wherein the stationary contacts are respectively composed of a contact part and a conductive part aligned in L-shape, wherein the conductive part at axial-directional side extends to the external circumference of an exciting coil, and wherein a terminal member is connected to an end of this conductive part and extends in the radial direction. A pair of stationary contacts are respectively molded in a pair of insulating members or in an insulating member secured to the rear end of the magnetic path core. An O-ring is secured to the external circumference of the insulating member. A case enveloping the exciting coil and a cover member enveloping those stationary and movable contacts respectively sandwich the O-ring in the axial direction to generate water-proof sealing effect.

Abstract: In a starter unit, the internal gear frame of an epicycle reduction gear is set rotatable with respect to the front bracket, and a first over-running clutch is made up of a clutch outer fixed to the front bracket, and a clutch inner which is the front end portion of the internal gear frame, and a second over-running clutch which is a conventional over-running clutch is mounted on the output shaft. The provision of the two over-running clutches eliminates the difficulty that, when the start switch is turned on during the inertial rotation of the engine or starter unit, the pinion is reengaged with the ring gear, so that abnormal shock is applied to the side of the starter unit to damage the rotation transmitting members.

Abstract: A planetary speed reduction gear type starter comprising a planetary speed reduction gear unit and a DC motor is designed as follows: In the case where the motor is smaller in outside diameter than the planetary speed reduction gear unit, the inside diameter of the yoke is accordingly reduced; that is, the front end portion of the yoke is increased in inside diameter into a large diameter portion. The planetary speed reduction gear unit is fitted in the large diameter portion, with the front end of which a front bracket is engaged. Thus, only one kind of front bracket can be used for a plurality of planetary speed reduction gear type starters different in reduction gear ratio.

Abstract: A starter motor including an electric motor (1) having an armature (1b) balanced in terms of rotation, thereby preventing the generation of a centrifugal force and its application to a bearing (8).

Abstract: In an overhang type starter, an output shaft having a pinion for rotating a ring gear of an engine is arranged so as to move forwardly through an interlocking member by a shift lever which is turned by an electromagnetic switch. Accordingly, it is not necessary to move an over-running clutch large in weight by the shift lever, so that the electromagnetic switch can be made compact in size.

Abstract: In a starter unit with an planetary gear speed reducer, the outer cylindrical surface of a cylindrical portion which is axially protruded from the carrier in the speed reducer, and the inner cylindrical surface of a radially extended wall portion of the clutch outer are engaged with each other in such a manner that they are slidable with each other with a predetermined rotation torque, and the end portion of the cylindrical portion is engaged with an axially extended cut formed in the outer cylindrical surface of the end portion of the clutch inner with a small clearance, whereby the engagement region of the carrier and the clutch outer can be increased in area, thus being able to positively and accurately cut the transmission of power attributing only to impact load.

Abstract: A starter motor is adapted to transmit through an overrunning clutch device a rotating force of an armature to a rotary output shaft to which a pinion is fitted by means of a linear spline structure so that the pinion is engageable with a ring gear connected to an engine. The rotary output shaft has a shoulder portion between a helical spline portion, which is engaged with a helical spline which in turn is formed at the inner circumference of the front part of a clutch inner member in the overrunning clutch device, and a linear spline portion to which the pinion is fitted, and a spring is disposed inside the inner diameter of the heical spline of the clutch inner member and between the helical spline of the rotary output shaft and the rear end of the pinion so that the pinion is pushed forwardly wherein the shoulder portion has a diamter smaller than the diameter of the root of the helical spline of the rotary output shaft.

Abstract: In a planet gear speed-reducing starter in which the rotation of the armature rotary shaft is applied through a planet gear speed-reducing mechanism to the output rotary shaft coupled to the planet gear speed-reducing mechanism, a carrier supporting the planetary gears of the planet gear speed-reducing mechanism is fitted on the rear end portion of the output rotary shaft with its rearward movement limited in such a manner that the output rotary shaft is limited in rearward movement while the carrier is limited in forward movement, and the carrier and the output rotary shaft are slidable with a predetermined torque with each other, whereby the impact occurring therewith is absorbed sufficiently.

Abstract: In an planetary gear unit comprising a sum gear, an internal gear, and planetary gears which are supported through a carrier and engaged with the sun gear and the internal gear, at least a cut is formed in the internal gear in such a manner that the position of the cut is not coincident with the angular intervals of the planetary gears in the direction of revolution, and the teeth are partially removed by the cut. Hence, the part of the internal gear where the cut is formed may be curved inwardly or flattened to provide a space for accommodating anything which otherwise obstructs the installation of the planetary gear unit.

Abstract: A starter motor for an engine which does not readily admit water into a casing thereof and which allows water to be discharged promptly from the housing. The starter motor comprises a seal member for closing a gap between an outer periphery of a pinion moving member on an output rotary shaft or of an overrunning clutch and the casing, and the casing has two communicating holes formed therein for the communication with the atmospheric air outside the casing. One of the communicating holes is formed at a lower portion of the casing so that water may be discharged outwardly from within the casing therethrough. The other communicating hole is formed at a higher location of the casing and may be a communicating groove formed in an end face of a front bracket of the casing along which the front bracket is coupled to a yoke of an electric motor which is mounted in the casing and operatively coupled to the pinion moving member by way of the overrunning clutch.

Abstract: 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.

Abstract: A coaxial engine starter comprising a d.c. electric motor (11), a planetary speed reduction gear unit (20), a unidirectional clutch and a pinion. The planetary gear unit (20) includes a large-diameter inner gear member (17) mounted to the front end of the motor housing (11a). The clutch and the pinion are housed within a front machine frame (21) attached to the inner gear member. The inner gear member (17) is securely held in place between the motor housing (11a) and the front machine frame (21) by U-shaped connectors (22) and through bolts (23) fastening the front machine frame (21), the inner gear member (17) and the motor housing (11a) together. Alternatively, the inner gear member (27; 37) including gear teeth (27a; 38a) may be directly thread-engaged by the through bolts (32) positioned radially inward of the inner gear teeth (27a; 38a) and the front machine frame (29) may be attached to the inner gear member (27; 37).