JPH051656Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a starter used to start an internal combustion engine.

[Problems to be solved by the prior art and the invention] Conventionally, some starters of this type include a pinion gear to which power from the starter motor is transmitted.
For example, in the 1980s, the starter motor was driven after the shift motor was driven to shift the internal combustion engine into engagement with the ring gear.
It is known from the publication No.-30364. Furthermore, as shown in Japanese Patent Application Laid-Open No. 61-112774, there is a system in which the shift motor is energized for a predetermined period of time, the pinion gear is shifted to the gear meshing side, and then energization to the starter motor is started several seconds later. In these systems, the starter motor is energized to drive after a predetermined time lag after the pinion gear shifts to the gear meshing state, which inevitably impairs the ability to start the engine quickly. Moreover, even after the gears are engaged, the shift motor continues to be energized in a locked state until the engine is started, so the shift motor continues to waste battery power during that time. As a result, the battery current flowing to the starter motor decreases, making it impossible to start the engine efficiently.In addition, the shift motor generates heat because it is in a locked state, and in some cases, it may burn out, causing the shift motor to become ineffective. New problems arise, such as having to deal with excessive quality motors, and it cannot be adopted immediately.

[Means for solving the problem] The present invention has been devised in view of the above-mentioned circumstances and with the objective of providing a starter that can eliminate these drawbacks, and comprises a starter switch, a starter motor, a pinion gear to which power from the starter motor is transmitted, a shift motor for shifting the pinion gear so that it meshes with a ring gear on the internal combustion engine side, control means for energizing a power circuit of the shift motor so that the pinion gear is driven toward gear meshing when the starter switch is turned ON, and power circuit switch means for closing the power circuit of the starter motor by closing when the pinion gear shifts to the gear meshing state, and further characterized in that the control means is provided with a reset circuit mechanism that is connected to the power circuit switch means and for de-energizing the power circuit of the shift motor when the power circuit switch means is closed.

With this configuration, the present invention allows the shift motor and starter motor to be driven at the same timing to avoid waste, thereby ensuring sufficient starting torque and ensuring that the shift motor is energized. This allows the lock to be avoided.

[Example] Next, an example of the present invention will be described based on the drawings. In the drawings, reference numeral 1 denotes a case body of a starter motor, and the distal end of an output rotating shaft 2 is rotatably supported on the case body 1. A clutch outer of the rotating clutch 3 is spline-fitted so as to be movable in the axial direction. Further, a pinion gear 6 is integrally provided on the clutch inner of the one-way rotating clutch 3. The pinion gear 6 can be freely displaced together with the one-way rotation clutch 3 between a position where it engages with a ring gear 8 on the internal combustion engine side and a position where it is released.

On the other hand, 4 is a starter motor, and the motor shaft 4a of the starter motor 4 is connected to the output rotation shaft 2.
Although coaxial with the base end of the planetary gear mechanism 5, it is interlocked in a decelerating manner. As will be described later, when the starter motor 4 is driven with the pinion gear 6 in the meshing position, the motor shaft 4
a. The pinion gear 6 rotates via the planetary gear mechanism 5, the output rotation shaft 2, and the one-way rotation clutch 3, which forces the ring gear 8 to rotate and starts the internal combustion engine. ing. When the internal combustion engine is started, the one-way rotation clutch 3 prevents the rotational force of the internal combustion engine from being transmitted to the starter motor 4.

Further, 7 is a shift motor provided in the case body 1, and the rotation of the output shaft 7a of the shift motor 7 is greatly reduced relative to the motor rotation speed by a built-in speed reduction mechanism (not shown). The output shaft 7a is formed by a so-called geared motor, and a multi-striped helical spline groove 7b is cut into the output shaft 7a. A contact shifter 9 is helically spline-fitted into the helical spline groove 7b, and the tip side of the contact shifter 9 is connected to a support member 10 integrally protruding from the case 1.
are slidably fitted to support and guide the contact shift 9. Furthermore, the contact shift 9 is provided with a contact plate 11 that is slidable in the axial direction on the shift motor 7 side, and a mounting tube 12 that is integrally provided at the tip portion corresponding to the insertion portion with the support body 10. There is. This mounting tube 1
2, one end of the shift lever 13 is swingably supported by a pin 13a;
3a passes through a groove 10a formed in the support body 10, thereby restricting the rotation of the contact shift 9 about its axis.
On the other hand, the intermediate portion 13b of the shift lever 13 is
The supporting piece 5b protruding from the case body 5a of the planetary gear mechanism 5 is in contact with one side, and the end 1b of the case body 1 is in contact with the other side, so that both sides are supported in a freely rolling manner. The other end of the shift lever 13 is engaged with a shift groove 3a formed in the one-way rotating clutch 3. Then, as will be described later, when the shift motor 7 is driven and the contact shift 9 is forcibly moved toward the shift motor 7 by the helical spline, the shift lever 13 swings about the intermediate portion 13b as a fulcrum. This moves the pinion gear 6 together with the one-way rotating clutch 3 to the side where it meshes with the ring gear 8. Furthermore, as the contact shift 9 moves toward the shift motor 7, the contact plate 11 comes into contact with the terminal plate 14 provided on the case body 1, and the power supply circuit of the starter motor 4 is closed, as will be described later. The starter motor 4 is driven to start the internal combustion engine, and thus constitutes a second switch means. Note that 15 is a bullet that urges the contact plate 11.

Next, a drive control procedure for the starter motor 4 and the shift motor 7 will be explained based on the control circuit diagram in FIG. 3. Here, the IGSW is an ignition switch, and turning it on supplies power to the control section 16, which will be described later, and other necessary electrical components (not shown). Same as before. Also STSW
is a starter switch, and DSW is a power circuit switch, and the wiring connected to these switches and motors is inputted to a control section (control means) 16 via terminals a to f.

When starting the internal combustion engine, first turn on the ignition switch IGSW, and then turn on the starter switch STSW. The ON command is input to the control unit 16 from terminal b via the starter switch IGSW and the starter switch STSW, and the ON command is input to the differential circuit,
Through the flip-flop circuit, the transistor
Tr1 from OFF to ON, and transistor Tr2
will be switched from ON to OFF. As a result, the current from the power source E is transferred to the ignition switch IGSW, terminal a, transistor Tr1, terminal c, shift motor 7, terminal d, and transistor Tr4 (transistor Tr3 is turned ON).
OFF), the current flows to the terminal f and is grounded, and the power circuit of the shift motor 7 becomes energized so that the motor 7 rotates in the forward direction, causing the contact shift 9 to operate as described above. The pinion gear 6 is moved to the side where it meshes with the ring gear 8.

Then, in synchronization with the gear engagement state in which the pinion gear 6 meshes with the ring gear 8, the contact plate 11 comes into contact with the terminal plate 14, and the power circuit switch DSW is closed, thereby starting the starter motor. 4 is driven with its power supply circuit closed, and this power supply circuit switch DSW is connected to a reset circuit provided in the control section 16. When the power circuit to the starter motor 4 is closed by closing the power circuit switch DSW, the voltage at the terminal e of the control unit 16 connected to the power circuit switch DSW decreases due to the starting current of the starter motor 4. become. This activates the reset circuit via terminal e and resets the flip-flop circuit.
As a result, the switched transistor Tr
1 goes from ON to OFF, transistor Tr2 is OFF
Then, the power supply circuit to the shift motor 7 is de-energized, and the shift motor 7 is stopped. In this way, when the internal combustion engine is started, when the shift motor 7 is driven and the gears are engaged, the drive control of the starter motor 4 and the stop control of the shift motor 7 are performed at the same time. It will be carried out accordingly.

On the other hand, since the internal combustion engine was started by the drive of starter motor 4, the starter switch STSW was turned off.
When the OFF command is input to the one-shot timer circuit via the inverter, transistor Tr3 is switched from OFF to ON, transistor Tr4 is switched from ON to OFF, and the current from power supply E is switched from ON to OFF. The current flows through terminal a, transistor Tr3, terminal d, shift motor 7, terminal c, transistor Tr2, and terminal f, so that shift motor 7 rotates in the opposite direction to the above, and the gear mesh is released. At the same time, the power circuit switch DSW is also turned off and the starter motor 4 is stopped. Then, when the timer time predetermined by the time constant of the one-shot timer circuit has elapsed, the output of the switching command to transistors Tr3 and Tr4 is stopped, and the transistor Tr3 is switched on again.
When the transistor Tr4 is turned off, the transistor Tr4 is turned on and the shift motor 7 is stopped.

As described above, in the embodiment of the present invention, the internal combustion engine is started by turning on the starter switch STSW and driving the shift motor 7, which causes the contact shift 9 to move and swing the shift lever 13. The pinion gear 6 is displaced to mesh with the ring gear 8, and the starter motor 4 follows this movement.
In this case, the contact plate 11 contacts the terminal plate 14 at the timing when the pinion gear 6 meshes with the ring gear 8, and the power circuit switch DSW closes. When this happens, the starter motor 4 is driven while the shift motor 7 is stopped.
Thereafter, while the starter motor 4 is in the energized driving state, the shift motor 7 remains de-energized and in the non-driving state. Then, when the starter switch STSW is turned OFF due to starting of the internal combustion engine, the shift motor 7 rotates in the reverse direction to release the gear mesh, and the power circuit switch DSW is turned OFF and the starter motor 4 is stopped.

As a result, the starter motor 4 is driven almost immediately after the starter enters the gear meshing state by driving the shift motor 7, and the internal combustion engine can be started quickly. When the starter motor 4 is driven,
The shift motor 7 automatically becomes de-energized and stops, and does not become locked with current flowing as in the conventional case. Therefore, when the starter motor is driven, the shift motor There is no wasteful consumption of the battery power source E by the starter motor 7, and accordingly a high current can be passed through the starter motor 4, thereby increasing the starting power. Moreover, the shift motor 7 itself does not become locked while the current continues to flow, so there is no need to make it of excessive quality to prevent heat generation or burnout, and a general-purpose one can be used, resulting in weight reduction. Of course, this can greatly contribute to cost reduction.

Incidentally, if the power to the shift motor 7 is cut off and stopped when the gears are engaged, the shift motor 7 must be of a structure that does not reverse rotation due to the load from the shift lever 13 side. In the example, this is done by using a geared motor with a large speed reduction. In this case, the helical spline is used to compensate for the delay in the shift movement of the contact shift.

[Operations and Effects] In short, the present invention is constructed as described above, and when the starter switch is turned ON, the shift motor is driven and the pinion gear is shifted to the gear meshing side. Immediately, the power circuit switch means closes, and the power circuit of the starter motor is closed, allowing quick starting of the internal combustion engine.

Furthermore, when the power circuit switch means is closed, the reset circuit mechanism provided in the control means de-energizes the power circuit of the shift motor, thereby stopping the shift motor. As a result, when driving the starter motor, there is no wasteful consumption of battery power by the shift motor, and a high current can be passed to the starter motor accordingly.
This will ensure an increase in starting power. At this time, the shift motor itself does not become locked due to current flowing through it, so there is no need to use excessive quality to prevent heat generation or burnout.
A small, general-purpose device can be used, which not only reduces weight but also greatly contributes to cost reduction.

[Brief explanation of the drawing]

The drawings show an embodiment of the starter according to the present invention, in which Fig. 1 is a sectional front view of the main part of the starter, Fig. 2 is a sectional plan view of the main part, and Fig. 3 is a control circuit diagram. be. In the figure, 4 is a starter motor, 6 is a pinion gear, 7 is a shift motor, 8 is a ring gear, 9 is a contact shift, 16 is a control section, STSW is a starter motor, and DSW is a power circuit switch.

Claims (1)

[Scope of utility model registration request] A starter switch, a starter motor, a pinion gear to which the power of the starter motor is transmitted, and a shift motor that shifts the pinion gear so that it meshes with a ring gear on the internal combustion engine side.
A control means that energizes the power circuit of the shift motor so that the pinion gear is driven to the gear meshing side when the starter switch is turned ON; a power circuit switch means for closing the power circuit, and the control means is further connected to the power circuit switch means, and when the power circuit switch means is closed, the power circuit of the shift motor is in a de-energized state. A starter characterized in that it is provided with a reset circuit mechanism.