JP6012788B2 - Engine starter - Google Patents

Description

  The present invention relates to an engine starting device for starting an engine.

  Usually, an engine starting device for starting an engine performs an engine starting operation while the engine is stopped. Therefore, the pinion gear provided in the engine starting device is engaged with the ring gear in a state where the ring gear provided in the engine is not rotating. However, in recent years, idling stop systems have become widespread in order to reduce fuel consumption, and engine starters used in idling stop systems are frequently used because of the high frequency of use of engine starters. Damage due to wear of the gear progresses and may cause the meshing failure of the pinion gear and the ring gear. Further, in a system that performs idling stop, in order to ensure engine restartability, the pinion gear may mesh with the ring gear even during rotation of the ring gear.

  For example, if a restart request is made at the moment when idling is stopped and the engine has not stopped rotating, or if it is necessary to reduce the time when restarting the engine from a stopped state, the ring The pinion gear and the ring gear are meshed in advance during the rotation of the gear.

  In such a case, as a method of meshing the pinion gear during the rotation of the ring gear, the meshing is performed when the rotation speed of the pinion gear and the rotation speed of the ring gear are between a predetermined rotational speed difference. Furthermore, since the meshing of the pinion gear and the ring gear during reverse rotation of the engine may increase the impact, it is possible to control the rotation start timing of the motor provided in the engine starter to be delayed than usual. Engine starter that uses a simple switch to delay the rotation start timing of the motor and avoid the meshing of the pinion gear and the ring gear during reverse rotation of the engine to avoid the impact caused by the meshing of the pinion gear and the ring gear Has been proposed (see, for example, Patent Document 1).

  Furthermore, in order to reduce the impact caused by the engagement between the pinion gear and the ring gear, an engine that reduces the impact caused by the engagement between the pinion gear and the ring gear is provided by providing an impact reduction means in the deceleration mechanism of the engine starter. Starters have also been proposed. (For example, refer to Patent Document 2). In addition, if the damage due to wear of the ring gear or pinion gear increases, the meshing properties of these gears deteriorate, and when the reverse rotation speed of the engine is large, not only the impact due to the meshing of the pinion gear and the ring gear increases, Since the failure of meshing between the pinion gear and the ring gear occurs, there is a case where control is performed to suppress meshing during reverse rotation of the engine.

JP 2012-031819 A Japanese Patent No. 5272879

  In the case of the above-described conventional engine starter, when the rotation speed of the ring gear is high when the pinion gear and the ring gear are engaged while the engine is inertially rotating, the pinion gear is idled by the overrunning clutch portion and the ring is rotated. Engagement is possible by synchronizing with the rotation speed of the gear, but when the engine is rotating in reverse, the pinion gear cannot rotate. The pinion gear and the ring gear do not need to be received on the mechanism side, but the pinion gear and the ring gear mesh with each other, so when the pinion gear and the ring gear collide with each other, the rotation of the pinion gear and the ring gear There is little amount of meshing in the direction, and if they mesh with the wear surface of those gears, the reaction force in the axial direction against the pinion gear More, so that the pinion gear is flipped greater in the counter-ring gear side. When the pinion gear is bounced away from the ring gear side, the rotation of the motor is started and the rotation speed of the motor is increased, the pinion gear is idled, and the pinion gear and the ring gear cannot be engaged with each other, and the engagement fails.

  As described above, when the pinion gear and the ring gear mesh with each other, the phenomenon in which the pinion is ejected to the ring gear side with respect to the ring gear occurs when the wear amount of these gears increases even if the engine is not rotating inertially. To get.

  The present invention has been made to solve the above-described problems in the conventional engine starting device, and the pinion gear and the ring gear are engaged even when the engine is rotating backward or the ring gear is worn. It is an object of the present invention to obtain an engine starter capable of performing

An engine starter according to the present invention comprises:
A motor section;
A pinion gear part that can be engaged with a ring gear provided in the engine, and a pinion moving body part that is helically splined to the output shaft of the motor part and is movable in the axial direction;
A solenoid switch unit having a push-out mechanism unit that moves the pinion moving body unit to a position where the pinion gear unit meshes with the ring gear; and a switch unit that turns on and off the energization current to the motor unit;
An engine starting device comprising:
The pinion moving body unit includes a transmission unit that transmits or blocks torque from the output shaft of the motor unit to the pinion gear unit,
The transmission unit is
The transmission of the torque to the pinion gear portion is interrupted until the pinion moving body portion moves to a position where the pinion moving portion meshes with the ring gear and the pinion gear portion meshes with the ring gear, and the pinion moving body portion Is moved to a position where the pinion gear part meshes with the ring gear, and the movement of the pinion gear part toward the ring gear side is suppressed or stopped as a result of the pinion gear part meshing with the ring gear. Configured to be able to transmit to the pinion gear part,
The pinion gear portion is configured to be capable of free rotation regardless of the rotation direction when the transmission portion blocks transmission of the torque to the pinion gear portion.
It is characterized by this.

The engine starting device according to the present invention is
A motor section;
A pinion gear part that can be engaged with a ring gear provided in the engine, and a pinion moving body part that is helically splined to the output shaft of the motor part and is movable in the axial direction;
A solenoid switch unit having a push-out mechanism unit that moves the pinion moving body unit to a position where the pinion gear unit meshes with the ring gear; and a switch unit that turns on and off the energization current to the motor unit;
An engine starting device comprising:
The pinion moving body unit includes a transmission unit that transmits or blocks torque from the output shaft of the motor unit to the pinion gear unit,
The transmission unit is
When the pinion moving body moves to a position where it engages with the ring gear and the pinion gear engages with the ring gear to a predetermined dimension in the axial direction, it contacts the side surface of the ring gear. A ring gear abutting portion that prevents the transmission portion from moving toward the ring gear side is provided, and the torque is transmitted to the pinion gear portion until the ring gear abutting portion abuts against a side surface portion of the ring gear. After the ring gear abutment portion abuts against the side surface portion of the ring gear, the torque can be transmitted to the pinion gear portion,
The pinion gear portion is configured to be capable of free rotation regardless of the rotation direction when the transmission portion blocks transmission of the torque to the pinion gear portion.
It is characterized by this.

The engine starter according to the present invention includes a motor unit and a pinion gear unit that can mesh with a ring gear provided in the engine, and is formed so as to be movable in the axial direction by helical spline coupling to the output shaft of the motor unit Solenoid switch having a pinion moving body, a push-out mechanism that moves the pinion moving body to a position where the pinion gear engages with the ring gear, and a switch that turns on and off the energization current to the motor The pinion moving body unit includes a transmission unit that transmits or blocks torque from the output shaft of the motor unit to the pinion gear unit, and the transmission unit includes Until the pinion moving body part moves to the position where it engages with the ring gear and the pinion gear part engages with the ring gear , Blocking the transmission to the pinion gear portion of the torque, the ring of the pinion gear portion by the pinion gear portion moves meshes with the ring gear to a position where the pinion moving body is engaged with the ring gear Due to the movement to the gear side being suppressed or stopped, the torque can be transmitted to the pinion gear portion, and the pinion gear portion is configured such that the transmission portion is the pinion gear. When the transmission of the torque to the part is interrupted, it is configured to be able to rotate freely regardless of the direction of rotation, so it is possible to mesh the pinion even during reverse rotation, and mesh even if the gear wears Failure can be suppressed.

  In addition, according to the engine starter of the present invention, the motor unit and the pinion gear unit that can mesh with the ring gear provided in the engine are provided, and are formed so as to be movable in the axial direction by helical spline coupling to the output shaft of the motor unit. A pinion moving body portion, a push-out mechanism portion that moves the pinion moving body portion to a position where the pinion gear portion meshes with the ring gear, and a switch portion that turns on and off the energization current to the motor portion. An engine starter including a solenoid switch unit, wherein the pinion moving body unit includes a transmission unit that transmits or blocks torque from an output shaft of the motor unit to the pinion gear unit, and the transmission unit Is moved to a position where the pinion moving body part meshes with the ring gear, and the pinion gear part moves forward with respect to the ring gear. A ring gear abutting portion that abuts on a side surface portion of the ring gear and prevents the transmission portion from moving to the ring gear side when meshed to a predetermined dimension in the axial direction; Until the ring gear comes into contact with the side surface of the ring gear, the transmission of the torque to the pinion gear portion is cut off, and after the ring gear contact portion comes into contact with the side surface of the ring gear, the torque is The pinion gear part is configured to be able to transmit to the pinion gear part, and the pinion gear part is free regardless of the rotation direction when the transmission part interrupts transmission of the torque to the pinion gear part. Since it is configured to be able to rotate, low noise, little wear, and the stroke for moving the lever and plunger to push out the pinion moving body can be reduced, achieving miniaturization. Rukoto can.

1 is an exploded perspective view of an engine starter according to Embodiment 1 of the present invention. 1 is a cross-sectional view of an engine starter according to Embodiment 1 of the present invention. It is a disassembled perspective view of the pinion moving body part in the engine starting device according to Embodiment 1 of the present invention. FIG. 3 is a perspective view of a clutch output shaft portion in the engine starter according to Embodiment 1 of the present invention. It is a perspective view of the transmission part in the engine starting device by Embodiment 1 of this invention. FIG. 3 is a perspective view of a pinion gear portion in the engine starter according to Embodiment 1 of the present invention. It is sectional drawing which shows the initial position of a ring gear and a pinion gear part in the engine starting device by Embodiment 1 of this invention. In the engine starting device according to Embodiment 1 of the present invention, it is a cross-sectional view showing a state in which the pinion gear portion comes into contact with the ring gear and the meshing proceeds. In the engine starting device according to Embodiment 1 of the present invention, it is a plan view showing a state where the pinion gear portion comes into contact with the ring gear and the meshing proceeds. In the engine starting device according to Embodiment 1 of the present invention, it is a plan view showing a state in which the pinion gear portion has finished meshing with the ring gear. In the engine starting device according to Embodiment 1 of the present invention, it is a cross-sectional view showing a state where torque is transmitted between a pinion gear portion and a ring gear. It is a disassembled perspective view of the pinion gear moving body part in the engine starting device according to Embodiment 2 of the present invention. It is sectional drawing which shows the initial position of a ring gear and a pinion gear part in the engine starting apparatus by Embodiment 2 of this invention. In the engine starting device by Embodiment 2 of this invention, it is sectional drawing when a pinion gear part meshes | engages directly with a ring gear. In the engine starting device according to Embodiment 2 of the present invention, it is a cross-sectional view when the transmission portion and the clutch output shaft are initially engaged. In the engine starting device by Embodiment 2 of this invention, it is sectional drawing when the pinion gear part and the ring gear are transmitting torque. It is a perspective view of the transmission part in the engine starting device by Embodiment 2 of this invention.

Embodiment 1 FIG.
Hereinafter, an engine starter according to Embodiment 1 of the present invention will be described in detail with reference to the drawings. 1 is an exploded perspective view of an engine starting device according to Embodiment 1 of the present invention. The engine starter according to Embodiment 1 of the present invention shown in FIG. 1 includes a motor unit 10, an output shaft 20, a pinion moving body unit 30, a solenoid switch unit 40, a plunger 50, a lever 60, and a bracket 70. And an output shaft stopper 80.

  The motor unit 10 generates a rotational force for starting the engine. The output shaft 20 is coupled to the motor unit 10 via a reduction gear unit 90. The pinion moving body portion 30 is helically splined to the output shaft 20 by a clutch helical spline portion 38a and an output shaft helical spline portion 20a, which will be described later, and rotates the peripheral surface of the output shaft 20 in the axial direction of the output shaft 20 It can slide while.

  The solenoid switch unit 40 is energized by a suction coil provided therein when a vehicle key switch is turned on or when an on command is issued from an engine control device (hereinafter referred to as ECU) to an engine start device. The plunger 50 is sucked. The lever 60 has a substantially central portion rotatably supported, one end engaged with the plunger 50 and the other end engaged with the pinion moving body 30. The suction coil, the plunger 50, and the lever 60 constitute a push-out mechanism that moves the pinion moving body 30 to a position where the pinion gear engages with the ring gear.

  The output shaft stopper 80 stops the movement of the pinion moving body 30 when the pinion moving body 30 moves to the non-motor unit 10 side to a predetermined position. The bracket 70 fixes each component part which consists of the motor part 10, the output shaft 20, the pinion moving body part 30, and the solenoid switch part 40 to the engine side.

  FIG. 2 is a cross-sectional view of the engine starting device according to Embodiment 1 of the present invention, showing a state where it is mounted on the engine. In FIG. 2, when starting the engine, the key switch of the vehicle is turned on or an on command for the engine starting device is issued from the ECU. As a result, a current flows through the suction coil 41 of the solenoid switch unit 40 and the plunger 50 is sucked into the suction coil 41. When the plunger 50 is attracted by the suction coil 41, one end of the lever 60 is drawn toward the solenoid switch portion 40, and rotates counterclockwise in FIG.

  When the lever 60 rotates counterclockwise, the other end of the lever 60 pushes the pinion moving body portion 30 to the right side of FIG. 2, that is, the counter motor portion 10 side. As a result, the output provided on the peripheral surface of the output shaft 20 The pinion moving body portion 30 is pushed rightward in FIG. 2 while rotating along the shaft helical spline portion 20a. Further, the plunger 50 is attracted by the suction coil 41 and comes into contact with the end of the contact shaft 42, and the contact shaft 42 is pushed leftward in FIG. 2 while compressing the spring 45. As a result, the moving contact portion 43 provided on the contact shaft 42 bridges the pair of motor contacts 44a and 44b, energization of the motor portion 10 is started, and the rotor of the motor portion 10 rotates.

  FIG. 3 is an exploded perspective view of the pinion moving body portion in the engine starting device according to Embodiment 1 of the present invention. In FIG. 3, the pinion moving body 30 includes an overrunning clutch portion 38, a clutch output shaft portion 37, a coil spring 36 as a spring member, a transmission portion 35, a pinion gear portion 34, and a pinion gear stopper 32. And a stopper fixing member 31.

  The pinion gear portion 34 meshes with the ring gear 100 of the engine and transmits torque to the ring gear 100. The pinion gear portion 34 is helically spline-coupled to the transmission portion 35 by a pinion gear portion helical spline portion 34b and a transmission portion helical spline portion 35e described later, and can slide in the axial direction with respect to the transmission portion 35. it can. The stopper fixing member 31 fixes the pinion gear stopper 32 to a torque output shaft 37 d described later of the clutch output shaft portion 37. The overrunning clutch portion 38 is helically splined to the output shaft 20 by an output shaft helical spline portion 20a and a clutch helical spline portion 38a, which will be described later, and can move while rotating in the axial direction of the output shaft 20. .

  The clutch output shaft portion 37 is coupled to the clutch input portion 38b of the overrunning clutch portion 38 via a plurality of coupling rollers 38c, as well shown in FIGS. 7, 8A, and 10 described later. . Torque from the clutch input portion 38b is transmitted to the clutch output shaft portion 37, but torque is not transmitted from the clutch output shaft portion 37 to the clutch input portion 38b. The coil spring 36 is provided between the clutch output shaft portion 37 and the pinion gear portion 34, and always urges the clutch output shaft portion 37 and the pinion gear portion 34 in a direction away from each other.

  FIG. 4 is a perspective view of the clutch output shaft portion in the engine starting device according to Embodiment 1 of the present invention. In FIG. 4, the clutch output shaft portion 37 includes a torque output shaft 37d, a torque output shaft shaft structure 37f formed integrally with the torque output shaft 37d, and one axial direction of the torque output shaft shaft structure 37f. A plurality of clutch output shaft torque non-transmission projection surfaces 37a formed on the end surface, a plurality of clutch output shaft torque transmission projection surfaces 37b formed on one axial end surface of the torque output shaft rod structure 37f, and a clutch output shaft The torque output shaft protrusion tip portion 37c formed by the ridgeline where the torque non-transmission protrusion surface 37a and the clutch output shaft torque transmission protrusion surface 37b are coupled to each other and the other axial end surface of the torque output shaft flange structure 37f. A torque input shaft 37e is provided. The clutch output shaft torque non-transmission projection surface 37a and the clutch output shaft torque transmission projection surface 37b are formed of inclined surfaces that are inclined at a predetermined angle in opposite directions.

  FIG. 5 is a perspective view of the transmission portion in the engine starting device according to Embodiment 1 of the present invention. In FIG. 5, the transmission portion 35 includes a transmission portion inner peripheral sliding surface 35c, a transmission portion flange structure 35f, and a transmission portion helical spline portion 35e fixed to one axial end surface of the transmission portion flange structure 35f. The plurality of transmission portion torque non-transmission projection surfaces 35a formed on the other axial end surface of the transmission portion flange structure 35f, and the plurality of transmission portion torques formed on the other axial end surface of the transmission portion flange structure 35f A transmission projection surface 35b and a transmission portion axial front end surface 35d, which is a flat surface formed between the transmission portion torque non-transmission projection surface 35a and the transmission portion torque transmission projection surface 35b, are provided. The transmission portion torque non-transmission projection surface 35a and the transmission portion torque transmission projection surface 35b are formed of inclined surfaces that are inclined at a predetermined angle in opposite directions.

  FIG. 6 is a perspective view of the pinion gear portion in the engine starting device according to Embodiment 1 of the present invention. In FIG. 6, the pinion gear portion 34 includes a plurality of pinion gear torque transmission tooth surfaces 34a provided on the outer peripheral surface at a predetermined pitch, a pinion gear portion helical spline portion 34b formed on the inner peripheral surface, The pinion gear axial direction front end surface 34c is provided.

  FIG. 7 is a cross-sectional view showing the initial positions of the ring gear and the pinion gear portion in the engine starting device according to Embodiment 1 of the present invention. The pinion gear portion 34 is pushed out to the ring gear 100 side by the lever 60. It shows the state before being released. In the initial position shown in FIGS. 7 and 2, the pinion gear portion 34 and the transmission portion 35 are stopped at a position where their axial end faces abut against the pinion gear stopper 32 by the biasing force of the coil spring 36. In this initial position, as shown in FIGS. 7 and 2, the torque output shaft flange structure 37f of the clutch output shaft section 37 and the transmission section flange structure 35f of the transmission section 35 are separated from each other.

  Next, as described above, when the key switch of the vehicle is turned on or the ECU start command is issued from the ECU, a current flows through the suction coil 41 of the solenoid switch unit 40 and the plunger 50 is sucked. The coil 41 is attracted and one end of the lever 60 is pulled to the solenoid switch unit 40 side. As a result, the lever 60 rotates counterclockwise in FIG. 2 about the lever rotation axis center 61.

  Due to the counterclockwise rotation of the lever 60, the overrunning clutch portion 38 is pushed out from the initial position shown in FIGS. 2 and 7 to the ring gear 100 side, and is connected to the output shaft helical spline portion 20a in a helical spline connection. The running clutch portion 38 slides on the output shaft 20 while rotating together with the clutch output shaft portion 37 and the pinion gear portion 34 and moves in the direction of the ring gear 100, and the pinion gear portion 34 contacts the ring gear 100. When the pinion gear portion 34 and the ring gear 100 come into contact with each other, the ring gear 100 and the pinion gear portion 34 start meshing while compressing the coil spring 36.

  At this time, even if the ring gear 100 is rotating in the reverse direction, the transmission portion inner peripheral sliding surface 35c of the transmission portion 35 freely rotates on the outer peripheral surface of the torque output shaft 37d of the clutch output shaft portion 37 regardless of the rotation direction. Since the transmission portion 35 and the pinion gear portion 34 can freely rotate, the ring gear 100 and the pinion gear portion 34 start meshing while compressing the coil spring 36. Can do.

  FIG. 8A is a cross-sectional view showing a state in which the pinion gear portion comes into contact with the ring gear and the meshing progresses in the engine starting device according to Embodiment 1 of the present invention. The transmission portion 35 and the pinion gear portion 34 are shown in FIG. And shows a state where the initial position is maintained. FIG. 8B is a plan view showing a state where the pinion gear portion comes into contact with the ring gear and the meshing progresses in the engine starting device according to Embodiment 1 of the present invention, and is connected to the transmission portion 35 by a helical spline. The pinion gear portion 34 is moved to the ring gear 100 side with respect to the transmission portion 35, and the pinion gear axial end surface 34 c is in contact with the pinion gear stopper 32.

  When the pinion gear portion 34 pushed out to the ring gear 100 side as described above comes into contact with the ring gear 100, the movement of the pinion gear portion 34 in the axial direction is suppressed by the ring gear 100, but the overrunning clutch portion. 38 and the clutch output shaft portion 37 are pushed and moved in the direction of the ring gear 100 against the elastic force of the coil spring 36, and the meshing between the pinion gear portion 34 and the ring gear 100 proceeds. The clutch output shaft protrusion tip portion 37 c of the clutch output shaft portion 37 abuts on the transmission portion axial direction tip surface 35 d of the transmission portion 35. This state is the state shown in FIGS. 8A and 8B.

  8A and 8B, when the pinion gear portion 34 further rotates together with the ring gear 100, the transmission portion 35 rotates, and the clutch output shaft torque transmission protrusion surface 37b of the clutch output shaft portion 37, As shown in FIG. 9, the torque output shaft rod structure 37f and the transmission portion rod structure 35f are engaged with each other, as shown in FIG. In this state, the rotation of the ring gear 100 is suppressed in the rotation direction indicated by the arrow in FIG. 9, and the pinion gear portion 34 is pivoted by the helical spline coupling between the pinion gear portion helical spline portion 34b and the transmission portion helical spline portion 35e. As shown in FIG. 10, the pinion gear axial direction front end surface 34c of the pinion gear portion 34 comes into contact with the pinion gear stopper 32, and the movement of the pinion gear portion 34 in the axial direction stops.

  When the pinion gear axial front end surface 34c comes into contact with the pinion gear stopper 32 and the movement of the pinion gear portion 34 in the axial direction stops, the transmission portion 35 is stretched against the axial pressing force of the clutch output shaft portion 37. Thus, the transmission portion torque transmission projection surface 35b and the clutch output shaft torque transmission projection surface 37b are firmly coupled, and torque can be transmitted from the clutch output shaft portion 37 to the transmission portion 35. Since the transmitted torque becomes the tension force of the transmission portion 35 described above, during torque transmission from the clutch output shaft portion 37 to the transmission portion 35, the transmission portion torque transmission projection surface 35b and the clutch output shaft torque transmission projection The connection with the surface 37b is not released. FIG. 10 is an explanatory diagram showing a state in which torque is transmitted between the pinion gear and the ring gear in the engine starting device according to Embodiment 1 of the present invention.

  As described above, the torque of the motor unit 10 is transmitted to the pinion gear unit 34 via the clutch output shaft unit 37 and the transmission unit 35. As a result, the ring gear 100 is driven by the pinion gear portion 34 and starts the engine. When the engine starts up from the start and the ring gear 100 rotates faster than the rotational speed of the pinion gear portion 34, the transmission portion 35 is connected by helical spline coupling between the pinion gear portion helical spline portion 34b and the transmission portion helical spline portion 35e. Is pulled to the pinion gear part 34 side, the coupling between the clutch output shaft torque transmission projection surface 37b and the transmission part torque transmission projection surface 35b is released, and the transmission part 35 and the pinion gear part 34 can idle. And the pinion gear part 34 and the transmission part 35 will return to an initial position.

  In the above description, the case where the engine is restarted by meshing the pinion gear portion and the ring gear when the engine is coasting at the idling stop of the engine has been described. However, the engine is completely stopped at the idling stop. Even when the pinion gear unit and the ring gear are engaged after stopping, or even when the engine starter of the vehicle is not equipped with an idling stop control device, the motor rotates to perform the same function as the rotation of the ring gear. Therefore, the engine starter of the present invention can perform the same operation as described above.

  According to the engine starter according to Embodiment 1 of the present invention, the pinion gear portion 34 of the pinion moving body portion 30 is configured to be able to idle before the pinion gear portion and the ring gear mesh with each other. The pinion gear portion can be engaged with the ring gear 100 without damaging the end face of the ring gear 100 and even when the engine is instantaneously reversely rotated.

  Furthermore, even if the ring gear is worn, the pinion gear portion 34 can rotate in any direction, so that it rotates in the direction in which the phase with the ring gear matches and is repelled by the ring gear and meshes. Will never fail. Therefore, even if the engine is rotating in reverse, the pinion gear part can mesh with the ring gear, and it is possible to suppress the meshing failure due to conventional wear, and control of prohibiting meshing during reverse rotation is unnecessary. Thus, the durability is also improved.

The engine starting device according to the first embodiment of the present invention described above embodies the inventions described in the following (1) to (4).
(1) a motor unit;
A pinion gear part that can be engaged with a ring gear provided in the engine, and a pinion moving body part that is helically splined to the output shaft of the motor part and is movable in the axial direction;
A solenoid switch unit having a push-out mechanism unit that moves the pinion moving body unit to a position where the pinion gear unit meshes with the ring gear; and a switch unit that turns on and off the energization current to the motor unit;
An engine starting device comprising:
The pinion moving body unit includes a transmission unit that transmits or blocks torque from the output shaft of the motor unit to the pinion gear unit,
The transmission unit is
The transmission of the torque to the pinion gear portion is interrupted until the pinion moving body portion moves to a position where the pinion moving portion meshes with the ring gear and the pinion gear portion meshes with the ring gear, and the pinion moving body portion Is moved to a position where the pinion gear part meshes with the ring gear, and the movement of the pinion gear part toward the ring gear side is suppressed or stopped as a result of the pinion gear part meshing with the ring gear. Configured to be able to transmit to the pinion gear part,
The pinion gear portion is configured to be capable of free rotation regardless of the rotation direction when the transmission portion blocks transmission of the torque to the pinion gear portion.
An engine starter characterized by that.
According to this configuration, it is possible to engage the engine by reverse rotation of the engine, suppress wear at the moment of normal engagement as well as reverse rotation, and it is possible to engage even if there is wear.

(2) The transmission unit
It said being a pinion gear portion and the helical spline coupling, by the pinion gear portion before Symbol pinion moving body is moved to a position meshing with the ring gear meshes with the ring gear, the said pinion gear unit transmission portion The transmission portion moves to a predetermined position in a direction away from the pinion gear portion based on the action of the helical spline coupling to the pinion gear portion, so that the torque can be transmitted to the pinion gear portion. Yes,
The engine starter according to (1) above, wherein

(3) The pinion moving part is
An overrunning clutch unit that idles when the pinion gear unit meshed with the ring gear is driven by the engine via the ring gear and rotates at a higher speed than the rotation of the output shaft, and the overrunning clutch unit A clutch output shaft coupled to the output side of the
The transmission unit is
When the clutch output shaft is supported by the clutch output shaft so that it can freely rotate in the axial direction regardless of the axial direction of the clutch output shaft and the transmission portion moves to the predetermined position, the clutch output It is configured to transmit the torque to the ring gear via the clutch output shaft portion in combination with a shaft portion.
The engine starter according to (2) above, wherein

(4) The clutch output shaft portion includes a clutch output shaft torque transmission projection surface inclined at a predetermined angle with respect to a surface perpendicular to the axial direction of the clutch output shaft portion,
The transmission unit includes a transmission unit torque transmission projection surface inclined at a predetermined angle with respect to a surface perpendicular to the axial direction of the transmission unit,
The clutch output shaft portion and the transmission portion are constantly urged in a direction away from each other by a spring member,
When the transmission unit moves to the predetermined position, the transmission unit torque transmission projection surface is coupled to the clutch output shaft torque transmission projection surface, whereby the torque is transmitted to the ring gear via the clutch output shaft unit. introduce,
The engine starter according to (3) above, wherein
According to this configuration, it is possible to transmit a large torque, not friction, by the torque transmission surface with a simple structure.

Embodiment 2. FIG.
In the engine starting device according to the first embodiment described above, the pinion gear portion 34 jumps into the ring gear 100 during the rotation of the engine so that the pinion gear portion 34 and the ring gear mesh with each other, and when the engine is stopped as usual. In any case where the pinion gear portion 34 is engaged with the ring gear 100, the pinion gear portion 34 pushed out to the ring gear 100 side comes into contact with the end surface of the ring gear 100 and the axial movement thereof is performed. The coil spring 36 is contracted by stopping, or the pinion gear portion 34 and the ring gear 100 start to engage and the movement of the pinion gear portion 34 in the axial direction is suppressed by the frictional force of both gear surfaces. The clutch output shaft portion 37 and the pinion gear portion 34 move relatively in the axial direction in the direction, whereby the clutch output shaft portion 3 The clutch output shaft torque transmission projection surface 37b and the transmission portion torque transmission projection surface 35b of the transmission portion 35 come into contact with each other to transmit torque between the clutch output shaft portion 37 and the transmission portion 35. As a result, the pinion The gear part 34 is further pushed out to the ring gear side so that the pinion gear part 34 and the ring gear 100 can be engaged with each other.

  In the engine starting device according to the first embodiment, when the pinion gear portion 34 does not contact the end surface of the ring gear 100 in the actual engine starting operation, or the tooth surfaces of the pinion gear portion 34 and the ring gear 100 do not contact each other, friction occurs. When the pinion gear part 34 meshes with the ring gear 100 without applying force, the transmission part 35 is not pushed out to the side opposite to the pinion gear part 34 (rear side). In order to enable transmission of torque to and from the transmission portion 35, the clutch output shaft portion 37 is pushed deeply toward the ring gear 100 to the position where the pinion gear portion 34 and the ring gear 100 are completely engaged with each other. It is necessary to bring the clutch output shaft torque transmission projection surface 37b of the output shaft portion 37 into contact with the transmission portion torque transmission projection surface 35b of the transmission portion 35. That. Accordingly, the stroke for pushing the pinion moving body 30 toward the ring gear 100 is increased, the stroke for moving the lever 60 and the plunger 50 for pushing the pinion moving body 30 is also increased, and the engine starter product itself is enlarged. To do. Further, the axial position of the clutch output shaft portion 37 with respect to the ring gear 100 when the pinion gear portion 34 and the ring gear 100 are engaged with each other also changes every time.

  Therefore, in the engine starter according to Embodiment 2 of the present invention, when the pinion gear portion 34 is engaged with the ring gear 100 by a predetermined amount or more, the transmission portion torque transmission projection surface 35b of the transmission portion 35 is connected to the clutch output shaft portion 37. The clutch output shaft torque transmission projection surface 37b is brought into contact with each other so that torque can be transmitted between them.

  FIG. 11 is an exploded perspective view of the pinion gear moving body portion in the engine starting device according to Embodiment 2 of the present invention. In FIG. 11, the ring gear abutting portion 39 is formed in a cylindrical shape, and the caulking portion 39 a of the ring gear abutting portion 39, which is one end portion in the axial direction thereof, is a transmitting portion 鍔 constituting body of the transmitting portion 35. It is caulked to the outer peripheral surface of 35f and is fixed integrally with the transmission portion 35. Therefore, the ring gear contact portion 39 can rotate around the axis integrally with the transmission portion 35 and can move in the axial direction integrally with the transmission portion 35. If the caulking portion 39a of the ring gear abutment portion 39 in the ring gear abutment portion 39 is integrated with the transmission portion torque transmission projection surface 35b, the shape matches the shape of the transmission portion torque transmission projection surface 35b. May be.

  FIG. 16 is a perspective view of the transmission portion in the engine starting device according to Embodiment 2 of the present invention. As shown in FIG. 16, the transmission part 35 includes a transmission part inner peripheral sliding surface 35c, a transmission part collar component 35f, and a transmission part helical spline part 35e fixed to one axial end face of the transmission part collar component 35f. A plurality of transmission portion torque non-transmission protrusion surfaces 35a formed on the other axial end surface of the transmission portion flange structure 35f, and a plurality of transmission portions formed on the other axial end surface of the transmission portion flange structure 35f. A torque transmission projection surface 35b, and a transmission portion axial front end surface 35d, which is a flat surface formed between the transmission portion torque non-transmission projection surface 35a and the transmission portion torque transmission projection surface 35b, are provided. The transmission portion torque non-transmission projection surface 35a and the transmission portion torque transmission projection surface 35b are configured by a plane extending perpendicularly to the axial direction by a length X2 from a plane orthogonal to the axial direction of the transmission portion 35.

  In FIG. 11, the clutch output shaft portion 37 includes a torque output shaft 37d, a torque output shaft shaft structure 37f formed integrally with the torque output shaft 37d, and one axial direction of the torque output shaft shaft structure 37f. A plurality of clutch output shaft torque non-transmission projection surfaces 37a formed on the end surface, a plurality of clutch output shaft torque transmission projection surfaces 37b formed on one axial end surface of the torque output shaft rod structure 37f, and a clutch output shaft The clutch output shaft protrusion tip portion 37c formed by a flat surface between the torque non-transmission protrusion surface 37a and the clutch output shaft torque transmission protrusion surface 37b and the other axial end surface of the torque output shaft flange structure 37f are fixed. Torque input shaft 37e. The clutch output shaft torque non-transmission projection surface 37a and the clutch output shaft torque transmission projection surface 37b are configured by a plane that extends vertically from the plane orthogonal to the axial direction of the clutch output shaft portion 37 by a length X2 in the axial direction. Yes. Other configurations shown in FIG. 11 are the same as those in the first embodiment.

  Next, the operation of the engine starter according to Embodiment 2 of the present invention configured as described above will be described. FIG. 12 is a cross-sectional view showing the initial positions of the ring gear and the pinion gear portion in the engine starter according to Embodiment 2 of the present invention, and FIG. 13 shows the engine starter according to Embodiment 2 of the present invention. FIG. 14 is a cross-sectional view when the pinion gear portion is directly meshed with the ring gear, and FIG. 14 is a cross-sectional view when the transmission portion and the clutch output shaft are initially meshed in the engine starter according to Embodiment 2 of the present invention. FIGS. 15A and 15B are cross-sectional views when the pinion gear portion and the ring gear transmit torque in the engine starting device according to Embodiment 2 of the present invention.

  In FIG. 12, the relative positions of the ring gear 100 and the pinion gear portion 34 are in an initial position relationship, and are in a state before the pinion moving body portion 30 is pushed out to the ring gear 100 side via the lever 60. At this initial position, the pinion gear axial front end surface 34c of the pinion gear portion 34 and the axial end surface of the ring gear 100 face each other in the axial direction with a gap of length Xa. At this time, the end surface in the axial direction of the ring gear contact portion 39 is configured to be further away from the end surface of the ring gear 100 by a length Xb in the axial direction than the tip end surface 34c in the pinion gear axial direction of the pinion gear portion 34. ing. That is, the axial end surface of the ring gear contact portion 39 is opposed to the axial end surface of the ring gear 100 through a gap having an axial length [Xa + Xb].

  As shown in FIG. 13, assuming that the pinion gear portion 34 is not in contact with the ring gear 100 and is engaged with the axial length Xb, the axial end surface of the ring gear contact portion 39 is the axis of the ring gear 100. It abuts on the direction end face. As a result, the transmission unit 35 stops moving in the axial direction toward the ring gear 100, and the pinion gear unit 34 also stops moving in the axial direction due to friction caused by helical spline coupling with the transmission unit 35.

  However, as shown in FIG. 13 described above, the axial end surface of the ring gear abutting portion 39 abuts on the axial end surface of the ring gear 100, so that the transmitting portion 35 and the pinion gear portion 34 toward the ring gear 100 side. Even if the movement stops, the overrunning clutch portion 38 is further pushed into the ring gear 100 side by the pressing of the lever 60. Accordingly, the clutch output shaft portion 37 is further pushed out toward the ring gear 100, and the clutch output shaft portion 37 and the transmission portion 35 are engaged with each other by the length X0 in the axial direction as shown in FIG.

  That is, in the state shown in FIG. 14, the clutch output shaft torque non-transmission protrusion surface 37 a and the clutch output shaft torque transmission protrusion surface 37 b in the clutch output shaft portion 37, and the transmission portion torque non-transmission protrusion surface in the transmission portion 35. 35a and the transmission part torque transmission projection surface 35b are engaged with each other by a length X0 in the axial direction.

  Here, the ring gear side end of the output shaft helical spline portion 20a provided on the output shaft 20 (see FIG. 1) so that the axial movement of the pinion moving body portion 30 stops at the position shown in FIG. Is configured to end. Therefore, the amount by which the pinion moving body 30 is pushed into the ring gear 100 by the lever 60 reaches the position shown in FIG.

  Note that the axial movement of the pinion moving body portion 30 on the clutch output shaft portion 37 is stopped by the output shaft stopper 80 so that the axial movement of the pinion moving body portion 30 stops at the position shown in FIG. You may comprise as follows. Even in this case, the amount by which the pinion moving body 30 is pushed into the ring gear 100 by the lever 60 reaches the position shown in FIG.

  As shown in FIG. 14, when the clutch output shaft torque transmission projection surface 37b of the clutch output shaft portion 37 and the transmission portion torque transmission projection surface 35b of the transmission portion 35 are engaged with each other by the length X0 in the axial direction, the motor portion 10 rotates. When the output shaft 20 rotates in the direction of the arrow A or when the ring gear 100 is reversely rotated, the transmission portion 35 is caused by the helical spline coupling between the transmission portion 35 and the pinion gear portion 34. Moves in the direction of arrow B, the pinion gear portion 34 moves in the direction of arrow C, and the transmission portion 35 and the pinion gear portion 34 move away from each other.

  As a result, as shown in FIG. 15, the transmission portion torque transmission projection surface 35b of the transmission portion 35 is completely removed to the clutch output shaft torque of the clutch output shaft portion 37 up to the axial depth X2 of the transmission portion torque transmission projection surface 35b. It meshes with the transmission projection surface 37b. Then, the pinion gear portion 34 further moves toward the ring gear 100 side while pushing the transmission portion 35 toward the counter ring gear 100 side, and finally comes into contact with the pinion gear stopper 32 to stop the axial movement. It is fixed at that position.

  At this time, as shown in FIG. 15, the ring gear 100 and the pinion gear portion 34 are completely engaged with each other, and between the axial end surface of the ring gear 100 and the axial end surface of the ring gear contact portion 39, A gap having an axial length Xc is generated. Torque is transmitted between the pinion gear portion 34 and the ring gear 100, but the axial length Xc is between the axial end surface of the ring gear 100 and the axial end surface of the ring gear contact portion 39. Since the gap is generated, the ring gear contact portion 39 is not rubbed against the ring gear 100 during torque transmission and does not hinder torque transmission.

  As shown in FIG. 15, if the transmission portion torque transmission projection surface 35b and the clutch output shaft torque transmission projection surface 37b are engaged with each other up to the axial depth X2, the engine is cranked when the engine is started. Even if the rotation of the gear becomes faster and the transmission of torque between the ring gear 100 and the pinion gear portion 34 ceases, if the engagement depth X2 is sufficiently secured as in [X2> Xc], transmission is possible. The engagement between the portion 35 and the clutch output shaft portion 37 is not disengaged, and loss due to the disengagement does not occur.

  Further, as shown in FIG. 16, the transmission portion torque non-transmission projection surface 35a and the transmission portion torque transmission projection surface 35b are surfaces extending perpendicularly (90 degrees) from a plane orthogonal to the axial direction of the transmission portion 35. Similarly, the clutch output shaft torque non-transmission projection surface 37a and the clutch output shaft torque transmission projection surface 37b extend perpendicularly (90 degrees) from a plane perpendicular to the axial direction of the clutch output shaft portion. The transmission portion torque transmission projection surface 35b and the clutch output shaft torque transmission projection surface 37b after the transmission portion torque transmission projection surface 35b and the clutch output shaft torque transmission projection surface 37b are brought into contact with each other and engaged with each other. There is no problem if a clearance (backlash) is provided between the transmission portion torque non-transmission projection surface 35a and the clutch output shaft torque non-transmission projection surface 37a.

  According to the engine starting device according to the second embodiment of the present invention configured as described above, the ring gear 100 is engaged with the pinion gear portion 34 that can be idled regardless of whether the engine is rotating or stopped. Further, low noise, little wear, and, as described above, the stroke for moving the lever 60 and the plunger 50 for pushing out the pinion moving body portion 30 can be reduced, and downsizing can be achieved.

The engine starter according to the second embodiment of the present invention described above embodies the invention described in the following (5) to (9).
(5) a motor unit;
A pinion gear part that can be engaged with a ring gear provided in the engine, and a pinion moving body part that is helically splined to the output shaft of the motor part and is movable in the axial direction;
A solenoid switch unit having a push-out mechanism unit that moves the pinion moving body unit to a position where the pinion gear unit meshes with the ring gear; and a switch unit that turns on and off the energization current to the motor unit;
An engine starting device comprising:
The pinion moving body unit includes a transmission unit that transmits or blocks torque from the output shaft of the motor unit to the pinion gear unit,
The transmission unit is
When the pinion moving body moves to a position where it engages with the ring gear and the pinion gear engages with the ring gear to a predetermined dimension in the axial direction, it contacts the side surface of the ring gear. A ring gear abutting portion that prevents the transmission portion from moving toward the ring gear side is provided, and the torque is transmitted to the pinion gear portion until the ring gear abutting portion abuts against a side surface portion of the ring gear. After the ring gear abutment portion abuts against the side surface portion of the ring gear, the torque can be transmitted to the pinion gear portion,
The pinion gear portion is configured to be capable of free rotation regardless of the rotation direction when the transmission portion blocks transmission of the torque to the pinion gear portion.
An engine starter characterized by that.
According to this configuration, it is possible to engage the engine by reverse rotation of the engine, suppress wear at the moment of normal engagement as well as reverse rotation, and it is possible to engage even if there is wear. Further, the stroke for moving the pinion and the lever or plunger for pushing out the moving body portion can be reduced, and the size reduction can be achieved.

(6) The transmission unit includes:
Based on the action of helical spline coupling between the pinion gear portion and the transmission portion after the ring gear abutting portion abuts on the side surface portion of the ring gear. The transmission part moves to a predetermined position in the axial direction in a direction away from the pinion gear part to separate the ring gear contact part from the side part of the ring gear,
The engine starter according to (5) above, wherein
According to this configuration, it is possible to reduce the stroke for moving the pinion and the lever or plunger for pushing out the moving body portion, and it is possible to achieve downsizing.

(7) The pinion moving part is
An overrunning clutch unit that idles when the pinion gear unit meshed with the ring gear is driven by the engine via the ring gear and rotates at a higher speed than the rotation of the output shaft, and the overrunning clutch unit A clutch output shaft coupled to the output side of the
The transmission unit is supported by the clutch output shaft unit so that the clutch output shaft unit can freely move in the axial direction and freely rotate regardless of the rotation direction, and the transmission unit moves to the predetermined position. , And configured to transmit the torque to the ring gear through the clutch output shaft portion in combination with the clutch output shaft portion.
The engine starter according to (6) above, wherein
According to this configuration, it is possible to engage the engine by reverse rotation of the engine, suppress wear at the moment of normal engagement as well as reverse rotation, and it is possible to engage even if there is wear. Further, the stroke for moving the pinion and the lever or plunger for pushing out the moving body portion can be reduced, and the size reduction can be achieved.

(8) The clutch output shaft portion includes a clutch output shaft torque transmission projection surface,
The transmission unit includes a transmission unit torque transmission projection surface,
The clutch output shaft portion and the transmission portion are constantly urged in a direction away from each other by a spring member,
When the transmission unit moves to the predetermined position, the transmission unit torque transmission projection surface is coupled to the clutch output shaft torque transmission projection surface, whereby the torque is transmitted to the ring gear via the clutch output shaft unit. introduce,
The engine starter according to (7) above, wherein
According to this configuration, torque can be reliably transmitted between the clutch output shaft portion and the transmission portion.

(9) The size of the meshing in the axial direction after the meshing between the clutch output shaft torque transmitting projection surface and the transmitting portion torque transmitting projecting surface is the same as the ring gear contact portion after the meshing is completed. It is set to be larger than the dimension of the gap between the side surfaces of the ring gear,
The engine starter according to (8) above, wherein
According to this configuration, after the engagement between the clutch output shaft torque transmission projection surface and the transmission portion torque transmission projection surface is completed, the ring gear contact portion of the transmission portion is securely held at a position separated from the side surface portion of the ring gear. can do.

  In the present invention, within the scope of the invention, each embodiment can be appropriately modified or omitted, and each embodiment can be appropriately combined.

  10 motor section, 20 output shaft, 20a output shaft helical spline section, 30 pinion moving body section, 31 stopper fixing member, 32 pinion gear stopper, 34 pinion gear section, 34a pinion gear torque transmission tooth surface, 34b pinion gear section helical spline 34c, pinion gear axial front end surface, 35 transmission portion, 35a transmission portion torque non-transmission projection surface, 35b transmission portion torque transmission projection surface, 35c transmission portion inner peripheral sliding surface, 35d transmission portion axial front end surface, 35e transmission portion helical Spline part, 35f Transmission part cage structure, 36 Coil spring, 37 Clutch output shaft part, 37a Clutch output shaft torque non-transmission projection surface, 37b Clutch output shaft torque transmission projection surface, 37c Clutch output shaft projection tip, 37d Torque output shaft , 37e Torque input shaft, 37f Output shaft rod structure, 38 overrunning clutch part, 38a clutch helical spline part, 39 ring gear contact part, 39a crimping part of ring gear contact part, 40 solenoid switch part, 41 suction coil 42 contact shaft, 43 movement Contact part, 44a, 44b Motor contact, 45 Spring, 50 Plunger, 60 Lever, 61 Lever rotation axis center, 70 Bracket, 80 Output shaft stopper, 90 Reduction gear part, 100 Ring gear

Claims (9)

A motor section;
A pinion gear part that can be engaged with a ring gear provided in the engine, and a pinion moving body part that is helically splined to the output shaft of the motor part and is movable in the axial direction;
A solenoid switch unit having a push-out mechanism unit that moves the pinion moving body unit to a position where the pinion gear unit meshes with the ring gear; and a switch unit that turns on and off the energization current to the motor unit;
An engine starting device comprising:
The pinion moving body unit includes a transmission unit that transmits or blocks torque from the output shaft of the motor unit to the pinion gear unit,
The transmission unit is
The transmission of the torque to the pinion gear portion is interrupted until the pinion moving body portion moves to a position where the pinion moving portion meshes with the ring gear and the pinion gear portion meshes with the ring gear, and the pinion moving body portion Is moved to a position where the pinion gear part meshes with the ring gear, and the movement of the pinion gear part toward the ring gear side is suppressed or stopped as a result of the pinion gear part meshing with the ring gear. Configured to be able to transmit to the pinion gear part,
The pinion gear portion is configured to be capable of free rotation regardless of the rotation direction when the transmission portion blocks transmission of the torque to the pinion gear portion.
An engine starter characterized by that. The transmission unit is
It said being a pinion gear portion and the helical spline coupling, by the pinion gear portion before Symbol pinion moving body is moved to a position meshing with the ring gear meshes with the ring gear, the said pinion gear unit transmission portion The transmission portion moves to a predetermined position in a direction away from the pinion gear portion based on the action of the helical spline coupling to the pinion gear portion, so that the torque can be transmitted to the pinion gear portion. Yes,
The engine starter according to claim 1. The pinion moving body part is:
An overrunning clutch unit that idles when the pinion gear unit meshed with the ring gear is driven by the engine via the ring gear and rotates at a higher speed than the rotation of the output shaft, and the overrunning clutch unit A clutch output shaft coupled to the output side of the
The transmission unit is
When the clutch output shaft is supported by the clutch output shaft so that it can freely rotate in the axial direction regardless of the axial direction of the clutch output shaft and the transmission portion moves to the predetermined position, the clutch output It is configured to transmit the torque to the ring gear via the clutch output shaft portion in combination with a shaft portion.
The engine starter according to claim 2. The clutch output shaft portion includes a clutch output shaft torque transmission projection surface inclined at a predetermined angle with respect to a surface perpendicular to the axial direction of the clutch output shaft portion,
The transmission unit includes a transmission unit torque transmission projection surface inclined at a predetermined angle with respect to a surface perpendicular to the axial direction of the transmission unit,
The clutch output shaft portion and the transmission portion are constantly urged in a direction away from each other by a spring member,
When the transmission unit moves to the predetermined position, the transmission unit torque transmission projection surface is coupled to the clutch output shaft torque transmission projection surface, whereby the torque is transmitted to the ring gear via the clutch output shaft unit. introduce,
The engine starting device according to claim 3. A motor section;
A pinion gear part that can be engaged with a ring gear provided in the engine, and a pinion moving body part that is helically splined to the output shaft of the motor part and is movable in the axial direction;
A solenoid switch unit having a push-out mechanism unit that moves the pinion moving body unit to a position where the pinion gear unit meshes with the ring gear; and a switch unit that turns on and off the energization current to the motor unit;
An engine starting device comprising:
The pinion moving body unit includes a transmission unit that transmits or blocks torque from the output shaft of the motor unit to the pinion gear unit,
The transmission unit is
When the pinion moving body moves to a position where it engages with the ring gear and the pinion gear engages with the ring gear to a predetermined dimension in the axial direction, it contacts the side surface of the ring gear. A ring gear abutting portion that prevents the transmission portion from moving toward the ring gear side is provided, and the torque is transmitted to the pinion gear portion until the ring gear abutting portion abuts against a side surface portion of the ring gear. After the ring gear abutment portion abuts against the side surface portion of the ring gear, the torque can be transmitted to the pinion gear portion,
The pinion gear portion is configured to be capable of free rotation regardless of the rotation direction when the transmission portion blocks transmission of the torque to the pinion gear portion.
An engine starter characterized by that. The transmission unit is
Based on the action of helical spline coupling between the pinion gear portion and the transmission portion after the ring gear abutting portion abuts on the side surface portion of the ring gear. The transmission part moves to a predetermined position in the axial direction in a direction away from the pinion gear part to separate the ring gear contact part from the side part of the ring gear,
The engine starter according to claim 5, wherein The pinion moving body part is:
An overrunning clutch unit that idles when the pinion gear unit meshed with the ring gear is driven by the engine via the ring gear and rotates at a higher speed than the rotation of the output shaft, and the overrunning clutch unit A clutch output shaft coupled to the output side of the
The transmission unit is supported by the clutch output shaft unit so that the clutch output shaft unit can freely move in the axial direction and freely rotate regardless of the rotation direction, and the transmission unit moves to the predetermined position. , And configured to transmit the torque to the ring gear through the clutch output shaft portion in combination with the clutch output shaft portion.
The engine starter according to claim 6. The clutch output shaft portion includes a clutch output shaft torque transmission projection surface,
The transmission unit includes a transmission unit torque transmission projection surface,
The clutch output shaft portion and the transmission portion are constantly urged in a direction away from each other by a spring member,
When the transmission unit moves to the predetermined position, the transmission unit torque transmission projection surface is coupled to the clutch output shaft torque transmission projection surface, whereby the torque is transmitted to the ring gear via the clutch output shaft unit. introduce,
The engine starter according to claim 7, wherein The size of the axial engagement after the engagement between the clutch output shaft torque transmission protrusion surface and the transmission portion torque transmission protrusion surface is completed is the ring gear contact portion and the ring gear after the engagement is completed. It is set to be larger than the dimension of the gap between the side surfaces of the
The engine starter according to claim 8.

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