Abstract: The engine starter includes a pinion-mobile component which is linked to an output shaft by a helical spline and can be slid in a shaft direction, in a state where the pinion-mobile component includes; an overrunning clutch which is idled when the pinion gear, which is engaged to the ring gear, is driven by the engine via the ring gear so as to be rotated at a rotational speed which is higher than a rotational speed of the output shaft; and a breaking mechanism in which the overrunning clutch breaks a transmission of a torque, which is generated in accordance with a rotation of the motor and is transmitted to the ring gear, when a value of the torque is a predetermined condition value with respect to a direction where the torque is transmitted to the ring gear.

Abstract: A ring gear to be coupled to a crankshaft of an engine; a starter motor for starting the engine; a pinion gear for transmitting rotation of the starter motor to the ring gear; pinion-gear meshing-engagement unit for moving the pinion gear to achieve meshing engagement with the ring gear; rpm-difference acquiring unit for acquiring an rpm difference between the pinion gear and the ring gear; and restart control unit for allowing the pinion gear to be moved by the pinion-gear meshing-engagement unit when the rpm difference between the pinion gear and the ring gear, which is acquired by the rpm-difference acquiring unit, becomes smaller than a threshold value are provided. The restart control unit includes threshold-value setting unit, and the threshold value corresponding to a characteristic to be input to the threshold-value setting unit is preset.

Abstract: Since a pinion gear unit which rotates according to the rotation of an output rotation shaft driven by the motor unit, a pushing mechanism which moves the pinion gear unit towards an engagement location of the pinion gear and an engine starting gear, and a bracket which includes a bracket main body unit which supports the motor unit and the pushing mechanism and a nose unit which extends from the bracket main body unit to a side opposite to the motor unit and rotatably bears a tip portion of the output rotation shaft on a side opposite to the motor unit, and which is attached to an engine side are included, a first stopper unit which restricts the movement of the rotation member to the direction of the engine starting gear is provided on the output rotation shaft, a second stopper unit which restricts the movement of the pinion gears to the direction of the engine starting gear by pushing and biasing of the elastic member is provided on the rotation member, and positioning the first stopper unit is positioned

Abstract: An engine startup device is provided having a helical-spline-engaging part where an output shaft (5) and a moving body (3) are coupled with each other, wherein a notch (37b, 38b) is formed on a power-transmitting-side tooth surface (37a, 38a) of at least either one of the output shaft and the moving body, and an angle formed by the notch with respect to a shaft direction is made smaller than the lead angle of a helical spline.

Abstract: Provided is an engine starter wherein a torsional angle ?1 of a helical spline 4a of an output shaft 4 is set in such a way that a reactive force Fp1 of a plunger spring 33, which is operated to a clutch 5, is larger than a propulsive force F, which is operated so as to urge the clutch 5 by a rotational force of the motor 2 in a shaft direction along a helical spline 4a of an output shaft 4, before a pinion engaging solenoid 8 is operated. Thereby, it can be prevented that the clutch 5 is urged in the shaft direction, so that it can be prevented without upsizing the engine starter that the pinion 6 is protruded in the shaft direction.

Abstract: An engine starting device for an automatic idling stop system includes: a crank angle sensor for detecting a crank angle of an engine; a ring gear connected to a crankshaft of the engine, for transmitting rotation of the engine; ring gear rpm detecting section; a starter motor for starting the engine; a pinion gear for transmitting rotation of the starter motor to the ring gear; pinion-gear push-out section for pushing out the pinion gear into meshing engagement with the ring gear; and pinion gear push-out control section for driving the pinion-gear push-out section to bring the pinion gear and the ring gear into meshing engagement when the ring gear rpm detected by the ring gear rotational speed detection section becomes smaller than a threshold value which is determined by at least one of the crank angle, a gear range, and a restart condition.

Abstract: The engine starting device includes a pinion unit which is spline-coupled to an output shaft side of a starter motor to slide in an axial direction, the pinion unit including a one-way clutch which spins for rotation in the same direction as that of rotation of the engine, and a pushing mechanism for moving the pinion unit to a position in which the pinion unit comes into meshing engagement with a ring gear. A pinion gear of the pinion unit is movable in the axial direction as a single body, and includes a chamfered portion having a curved surface along a tooth surface on a non-torque transmitting surface side and a large length in the axial direction, the chamfered portion being provided to a ring-gear side distal end portion of the tooth surface on the non-torque transmitting surface side.

Abstract: It is possible to obtain an engine starting device in which, at the time of initial engagement of a first pinion gear and an engine starting gear, in a case where the first pinion gear collides with the engine starting gear, the first pinion gear is inclined with respect to the second pinion gear, a void having a predetermined size for expanding the inclined state is formed between a surface of an end surface portion of the first pinion gear on the side of an end surface portion of the second pinion gear, and a surface of an end surface portion of the second pinion gear on the side of the end surface portion of the first pinion gear, even in a case where any one of the rotation speed of the engine starting gear and the rotation speed of the pinion gear is larger than the other, rotation synchronization of the engine starting gear and the pinion gear and phase focusing of the teeth between the engine starting gear and the pinion gear is further rapidly and further reliably performed at the time when the engine

Abstract: A pinion gear unit includes a rotation member which rotates according to the rotation of a output rotation shaft, a first pinion gear which is fit to the rotation member through a first serration unit, rotates with the rotation member according to the rotation of the output rotation shaft, and moves with the rotation member if the pinion gear unit moves towards an engagement location by a pushing mechanism, to be initially engaged with an engine starting gear, and a second pinion gear which is fit to the rotation member to be adjacent to the first pinion gear through a second serration unit, rotates with the rotation member according to the rotation of the output rotation shaft, and moves with the rotation member if the pinion gear unit further moves towards the engagement location, to be engaged with the engine starting gear later than the first pinion gear, in a state where the first pinion gear is engaged with the engine starting gear, and the fitting is performed by the first and second serration units so

Abstract: Since a pinion gear unit which rotates according to the rotation of an output rotation shaft driven by the motor unit, a pushing mechanism which moves the pinion gear unit towards an engagement location of the pinion gear and an engine starting gear, and a bracket which includes a bracket main body unit which supports the motor unit and the pushing mechanism and a nose unit which extends from the bracket main body unit to a side opposite to the motor unit and rotatably bears a tip portion of the output rotation shaft on a side opposite to the motor unit, and which is attached to an engine side are included, a first stopper unit which restricts the movement of the rotation member to the direction of the engine starting gear is provided on the output rotation shaft, a second stopper unit which restricts the movement of the pinion gears to the direction of the engine starting gear by pushing and biasing of the elastic member is provided on the rotation member, and positioning the first stopper unit is positioned

Abstract: The engine starting device includes a starter motor, a pinion portion, a pushing mechanism for pushing a pinion gear of the pinion portion to a position at which the pinion gear comes into meshing engagement with a ring gear, and an integrated switch for operating a motor-energization switch to pull a plunger after the pinion gear is pushed, by configuring a switch for actuating the pushing mechanism and turning ON/OFF an energization current to the starter motor by a single plunger coil. When a restart request is issued after an engine stop is requested and therefore the integrated switch is placed in an ON state, operation timing of the pushing mechanism and coil-operation timing of the plunger coil are set so that the starter motor avoids operating until the pinion gear comes into contact or meshing engagement with the ring gear.

Abstract: Provided is a device for automatically stopping an engine when an automatic stop condition is satisfied and restarting the engine thereafter when a restart condition is satisfied, the device including: a ring gear (12) to be coupled to a crankshaft of the engine; a starter motor (14) for starting the engine; a pinion gear (16) for transmitting rotation of the starter motor to the ring gear; pinion-gear moving means (17) for moving the pinion gear by energization to bring the pinion gear into meshing engagement with the ring gear; and starter control means (11) for controlling a voltage to be applied to the pinion-gear moving means so as to fall within a predetermined range when the pinion gear and the ring gear are brought into meshing engagement by moving the pinion gear by the pinion-gear moving means.

Abstract: The engine starter includes: a starter motor; a pinion unit (30) for sliding in an axial direction on an output shaft of the starter motor; and a ring gear (100) which meshes with a pinion pushed out by a push-out mechanism (60) and receives a transmission of a rotational force of the starter motor to thereby start an engine, and the pinion portion (30) includes a pinion gear divided in the axial direction into two pinion gears which are a first pinion gear (35) having a protruded shape for synchronization, for first colliding with the ring gear upon start of meshing with the ring gear, and a second pinion gear (34) for serving to transmit the rotational force after the meshing.

Abstract: An engine starting device includes: a starter motor; a pinion unit coupled to an output-shaft side of the starter motor by a spline, for sliding in an axial direction; and a ring gear which meshes with a pinion gear of the pinion unit pushed out by a push-out mechanism, and receives a transmission of a rotation force of the starter motor, thereby starting an engine. The pinion unit includes, on all teeth on distal end portions in a meshing axial direction of the pinion gear meshing with the ring gear, synchronization surfaces which are a pair of surfaces parallel with the meshing axial direction, and have a thickness thinner than a tooth thickness of the pinion gear.

Abstract: Engine starting device, including: a crank signal generation unit (13); and an engine control unit (10) for identifying a predetermined crank position of a crankshaft, and starting the engine, in which the engine control unit estimates, in a course of stopping the engine when a stop condition for the engine is established, based on an engine rpm at the identified predetermined crank position, whether or not the engine rotates backward before reaching the predetermined crank position for a next time, and after estimating that the engine rotates backward, sets an inhibition range which is prescribed from a starter drive inhibition start timing to a starter drive inhibition reset timing, and a permission range which is other than the inhibition range, and when the restart condition is established during rotation of the engine, inhibits restart in the inhibition range and carries out the restart in the permission range.

Abstract: Obtained is an engine starter having a structure in which, even when frictional heat is generated on a roller due to sliding of a roller and a clutch inner with respect to each other, deformation of a rolling contact surface of the roller is reduced by suppressing reduction in hardness of the rolling contact surface of the roller due to the frictional heat, thereby making it possible to improve transmission of a rotation force from a clutch outer to a clutch inner. The engine starter includes a clutch (5) for transmitting a rotation force of an output shaft (4) to a pinion gear (7), a clutch outer (10), a clutch inner (11) having one end portion facing an inner portion of the clutch outer (10) and another end portion to which the pinion gear (7) is fixed, and a roller (12) which rolls while being provided between the clutch outer (10) and the clutch inner (11). The clutch outer (10) is formed with a notch portion (10a) of a tapered shape.

Abstract: In the engine starter related to the present invention, a torsional angle ?1 of a helical spline 4a of an output shaft 4 is set in such a way that a reactive force Fp1 of a plunger spring 33, which is operated to a clutch 5, is larger than a propulsive force F, which is operated so as to extrude the clutch 5 by a rotational force of the motor 2 in a shaft direction along a helical spline 4a of an output shaft 4, before a pinion extruding solenoid 8 is operated. Thereby, it can be prevented that the clutch 5 is extruded in the shaft direction, so that it can be prevented without upsizing the engine starter that the pinion 6 is protruded in the shaft direction.

Abstract: Provided is an engine starter having a simple structure and excellent in stability and reliability, which starts an engine while preventing an occurrence of instantaneous interruption in an electrical device mounted in a vehicle. An engine starter for driving a starter motor by closing a starter switch 5 connected in series between a power source 3 and the starter motor 2 for receiving power supply from the power source to start an engine includes: a resistor 7 connected in series to the starter switch between the power source and the starter motor, for limiting a current flowing through the starter motor; and a short-circuiting switch 6 connected in parallel to the resistor, for short-circuiting both ends of the resistor by energization of a driving coil after start of an operation of closing the starter switch, and the resistor is made of a plate-like stainless steel.

Abstract: Rollers and springs are installed in notch portions of a clutch outer (S104), an inscribed circle diameter of the rollers is measured in a state in which the rollers are placed in contact with stopping portions by pressure from the springs (S105), and an outside diameter of a cylindrical portion is determined from the inscribed circle diameter measured value such that a predetermined amount of roller bite is achieved (S106). Then, the outside diameter of the cylindrical portion is finished so as to have the determined value of the outside diameter (S108). An overrunning clutch is assembled by pairing together the clutch outer, rollers, and springs and the clutch inner (S110).

Abstract: A ring gear to be coupled to a crankshaft of an engine; a starter motor for starting the engine; a pinion gear for transmitting rotation of the starter motor to the ring gear; pinion-gear meshing-engagement unit for moving the pinion gear to achieve meshing engagement with the ring gear; rpm-difference acquiring unit for acquiring an rpm difference between the pinion gear and the ring gear; and restart control unit for allowing the pinion gear to be moved by the pinion-gear meshing-engagement unit when the rpm difference between the pinion gear and the ring gear, which is acquired by the rpm-difference acquiring unit, becomes smaller than a threshold value are provided. The restart control unit includes threshold-value setting unit, and the threshold value corresponding to a characteristic to be input to the threshold-value setting unit is preset.