JPH0618662U - Starter synchronous switch - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a starter synchronous switch capable of more appropriately preventing breakage of a ring gear and maintaining a disengagement rate similar to a single starter. A plurality of starters including at least a magnetic switch Mgi including a coil input terminal Ci, a battery input terminal Bi, a battery output terminal Wi, and a suction coil output terminal Si, and a motor including a battery input terminal Mi. On the other hand, for each starter, O is generated between the suction coil output terminal Si and the battery input terminal Mi by the current from the battery output terminal Wi of the starter.
The b contact Swn for FF is provided, and for all the starters, it is turned on only when there is a current from all the battery output terminals Wi between the battery input terminals Mi of all the starters and the battery 3. It is configured to include the a-contact Sw.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a starter synchronous switch having an improved non-meshing ratio.

[0002]

[Prior art]

 Large engines may be equipped with multiple starters. When starting such an engine, these starters are operated simultaneously, but the pinion gears of all the starters may not mesh with the ring gears of the engine at the same time. For example, when the battery capacity is sufficient and the engine load is small, the ring gear is rotated only by the previously meshed starter, and the pinion gear of the other non-meshed starter becomes the rotating ring gear. Even if they just bump into each other, they will no longer mesh. At this time, a rattling sound is generated due to non-meshing, and the ring gear is damaged.

A so-called starter synchronous switch prevents the ring gear from being damaged. In this system, after the pinion gears of all the starters mesh with the ring gear, the main current is simultaneously passed through the motors of the starters.

Therefore, a typical conventional example of the starter synchronous switch will be described with reference to FIG.

First, the starting circuit shown in FIG. 1 will be roughly described. Two starters 11 and 12 are attached to the engine. 2 is an engine flywheel, 21 is a ring gear, 3 is a battery, 4 is a start switch, and 5 is a safety relay.

As shown in the figure, the starter 11 is roughly classified into a magnetic switch Mg.₁, Armature coil A₁And field coil F₁And the motor section and the pinion gear P ₁ And, terminal C₁, B₁₃, B₁₂, B₁₁, B₁₄, M₁Is equipped with. Magnetic switch Mg₁Is a holding coil Sc1a, a suction coil Sc2a, and double contacts Sw1a and Sw2a.

On the other hand, the starter 12 is roughly divided into a magnetic switch Mgb ₂ , a motor section composed of an armature coil A ₂ and a field coil F ₂ , and a pinion gear Pb as in the above, and the terminals C ₂ , B ₂₃ , and a _{B 22, B 21, B 24} , M 2. The magnetic switch Mg ₂ comprises a holding coil Sc1b, a suction coil Sc2b, and double contacts Sw1b, Sw2b.

The safety relay 5 will not be described in detail, but even if the start switch 4 is accidentally operated during engine operation, the starters 11 and 12 do not operate (that is, current does not flow into the illustrated coil Sc). In addition, the power generation current S1 of an alternator (or dynamo) not shown is input. Also, when the starters 11 and 12 are still rotating at the time of start failure, even if the start switch 4 is accidentally turned on for restart, these starters 11 and 12 do not restart ( That is, similarly to the above, the generated current S2 of the starters 11 and 12 is input from the terminals C ₁ and C ₂ of the starters 11 and 12 so that the current does not flow into the illustrated coil Sc). In addition, the safety relay 5 has a built-in start repeating relay, which is not shown. Further, the battery relay, the engine body, etc. are omitted in the starting circuit shown in FIG.

Next, the operation of the starter synchronous switch in the starting circuit will be described. When the start switch 4 is turned on, the current from the battery 3 flows through the safety relay 5 to the coil Sc, and the switch Sw is turned on. As a result, the battery 3 is connected to the terminals C ₁ and C _{2 of the} starters 11 and 12, and the current from the battery 3 flows through the coils Sc1a, Sc2a, Sc1b, Sc2b and the double contacts Sw1a, Sw2a, Sw1b, Sw2b. Is operated to engage both pinion gears P ₁ and P ₂ with the ring gear 21.

[0010] Each dual contact SW1A, Sw2a, SW1b, Sw2b is turned ON, for the starter 11, the terminal B ₁₃ of the starter 11 from the battery 3 through the terminal B ₂₁ and the switch Sw2b and the terminal B ₂₂ of the starter 12 A main current flows through the armature coil A ₁ and the field coil F ₁ via the switch Sw1a, the terminal B _14, and the terminal M ₁ . On the other hand, with respect to the starter 12, the armature coil from the battery 3 via the terminal B _{11 of the} starter 11, the switch Sw2a and the terminal B ₁₂ through the terminal B _{23 of the} starter 12, the switch Sw1b, the terminal B ₂₄ and the terminal M _2. The main current flows through A ₂ and the field coil F ₂ . As a result, both armature coils A ₁ and A ₂ rotate to rotate the pinion gears P ₁ and P _2, and the flywheel 2 rotates via the ring gear 21 to start the engine.

In the above description, it is assumed that only the pinion gear P _{1 of the} starter 11 meshes with the ring gear 21 and the pinion gear P ₂ of the starter 12 does not mesh with the ring gear 21. In such a state, since the double contacts Sw1b and Sw2b of the starter 12 are OFF, the main current does not flow into the armature coil A ₁ of the starter 11 as well as the armature coil A ₂ of the starter 12.

That is, as described above, according to the starter synchronous switch, the main current does not flow in each starter until the pinion gears of all the starters mesh with the ring gears, and the pinion gears P ₁ , It becomes possible to prevent the ring gear 21 from being damaged by the rotation of P ₂ .

The starter synchronous switch is configured by providing double contacts on both starters 11 and 12, but without providing such double contacts, a starter having a plurality of general configurations can be used. There are various types, such as those configured with an externally provided relay circuit. However, as described above, the conventional starter synchronous switch has a structure in which the drive current is simultaneously supplied to the motors of the starters after the pinion gears of all the starters mesh with the ring gear.

[0014]

[Problems to be solved by the device]

 By the way, the conventional starter synchronous switch has the following disadvantages. This will be described below with reference to FIG.

[0015] If the starter 12 is not engaged, as described above, from the battery 3 to the armature coils A _1, A ₂ of the two starter 11 without the main current flows, both Amachi Yuakoiru A _1, A ₂ is Does not rotate.

However, an auxiliary current flows through both magnetic switch circuits Mg ₁ and Mg _{2 although} it is small, and in particular, the auxiliary current flowing through both suction coils Sc2a and Sc2b is the both armature coils A ₁ and A _2. Flow into and try to rotate them. Here, since the rotation direction (vector) of the meshing starter 11 is the same (however, it does not rotate once), the ring gear rotates in the same direction (only a few angles), so the non-meshing starter is not meshing. It will remain as it is.

Therefore, since the key is repeatedly turned OFF → ST many times, the ring gear collides with each other and the surface roughness becomes severe, so that it becomes more difficult to mesh. Although the above-mentioned conventional starter synchronous switch can greatly prevent the damage of the stage ring gear, there is a fact that it hardly contributes to the improvement of the above-mentioned non-meshing ratio which requires the starter synchronous switch. . Incidentally, the disengagement rate in the single starter is 0. Although it is about 5% to 1%, the non-meshing ratio in the double starter is about 20% to 30% even if the starter synchronization switch is mounted, and this difference is large.

In view of the above situation, it is an object of the present invention to provide a starter synchronous switch that can prevent damage to a ring gear more favorably and can maintain a disengagement ratio comparable to a single starter.

[0019]

[Means and Actions for Solving the Problems]

 In order to achieve the above object, the starter synchronous switch according to the present invention will be described with reference to FIG. 1. At least the coil input terminal Ci, the battery input terminal Bi, the battery output terminal Wi and the suction coil output terminal Si will be described. For a plurality of (i, i ≧ 2) starters each consisting of a magnetic switch Mgi provided and a motor provided with a battery input terminal Mi, a suction coil output terminal S is provided for each starter. i and a battery input terminal Mi are provided with a b contact Swn which is turned off by a current from a battery output terminal Wi of the starter, and for all starters, the battery input terminals Mi and the batteries 3 of all starters are provided. It is configured to have an a contact Sw that is turned on only when there is a current from all the battery output terminals Wi between and. With this configuration, it is possible to prevent damage to the ring gear more favorably, and to maintain a non-meshing ratio similar to that of a single starter.

[0020]

【Example】

 FIG. 1 is a diagram showing an embodiment of a starter synchronous switch according to the present invention. Note that, although FIG. 1 includes a part of the configuration described in FIG. 2, the same reference numerals as those in FIG. Further, safety relays and the like not directly related to the present invention are omitted. First, the starter will be described. The double contact type starter described in the section of the prior art is a special example, and a normal starter is equipped with a coil input terminal Ci and a battery output terminal Bi, and will be described with reference to FIG. The terminal Wi and the suction coil output terminal Si are joined in the starter to form one output terminal, which is wired to the battery input terminal Mi. In this example, the code i is i = 1 for the starter 11 and i = 2 for the starter 12.

However, in the starter according to the present invention, the magnetic switch Mgi is provided with the coil input terminal Ci, the battery input terminal Bi, the battery output terminal Wi and the suction coil output terminal Si, and the motor is provided with the battery input terminal Mi. There is. Then, a plurality of such starters (i, i ≧ 2) are mounted on the engine. In this embodiment, two starters 11 and 12 are attached to the engine.

A b contact Sw1 is provided between the suction coil output terminal S1 of the starter 11 and the battery input terminal M1. The b contact Sw1 is turned off when a current flows from the battery output terminal W1 to the coil Sc1. On the other hand, a b contact Sw2 is provided between the suction coil output terminal S2 of the starter 12 and the battery input terminal M2. The b-contact Sw2 turns off when a current flows from the battery output terminal W2 to the coil Sc2.

An AND circuit 51 is provided between the battery output terminals W1 and W2 of the starters 11 and 12 and the coils Sc1 and Sc2, and is turned on when a voltage is generated at both battery output terminals W1 and W2. Therefore, the output signal is amplified by the amplifier 52 and becomes the base current of the transistor 53.

The collector side of the transistor 53 of this embodiment is connected to the battery 3 via the coil Sc. The coil Sc is provided with an a-contact type switch Sw that is turned on when a current flows therethrough. When the switch Sw is turned on, the battery 3 and the battery input terminals M1 and M2 of the starters 11 and 12 are electrically connected.

Operation of the above embodiment will be described. When the start switch 4 is turned on, a voltage is applied to the terminals C ₁ and C ₂ of both starters 11 and 12, the starter magnetic switches Mg ₁ and Mg ₂ are actuated, and both pinion gears P ₁ and P ₂ are popped out and ringed. Hit the gear 21.

Both pinion gears P₁, P₂When the gear meshes with the ring gear 21, the terminals B1-W1 and the terminals B2-W2 are turned on, and currents flow through the coils Sc1 and Sc2, respectively. As a result, the switches Sw1 and Sw2 are turned off. At the same time, the AND circuit 51 turns on the transistor 53 and turns on the switch Sw. The main current flows from the battery 3 to both starters 11 and 12, and both armature coils A₁, A ₂ Rotates and starts the engine.

If the pinion gear P ₁ meshes with the ring gear 21 and the pinion gear P ₂ does not mesh with the ring gear 21, the terminals B1 and W1 of the starter 11 are turned on and the switch Sw1 is turned off. . Therefore, the meshing of the starter 11 is maintained by the auxiliary current flowing through the holding coil Sc1a, but neither the auxiliary current from the suction coil Sc2a nor the main current from the battery 3 flows into the armature coil A ₁ and the starter 11 completely rotates. Disappear. On the other hand, the pinion gear P ₂ of the starter 12 can be meshed with the ring gear 21 with the same behavior and with the same non-meshing ratio as the single starter, because the pinion gear P ₂ is equal without the starter 11.

After the start is completed, the start switch 4 is turned off to turn off the terminals B1 to W1 and the terminals B1 to W1. Therefore, the AND 51 does not output and the transistor 53 is turned off. As a result, the switch Sw is turned off, and the main current to both the stars 11 and 12 is turned off.

The effects of the above embodiment will be described. According to the above-described embodiment, when the pinion gear Pi is sliding, the auxiliary current flows from the suction coil output terminal Si to the armature coil Ai. However, if the pinion gear 21 meshes with the auxiliary current, the auxiliary current will be applied to the armature coil Ai. Will not flow into. That is, after engaging with each other, it has no effect. Therefore, it is possible to engage with each other at a disengagement ratio similar to that of a single starter. That is, the non-meshing is significantly reduced, and the damage of the ring gear 21 due to the non-meshing can be significantly reduced.

[0030]

[Effect of device]

 As described above, according to the starter synchronous switch of the present invention, the auxiliary current flows to the armature coil to rotate each starter until the pinion gear of each starter meshes with the ring gear. If so, the auxiliary current is cut off. Therefore, when a plurality of starters are used, even if there is a non-meshing starter, they can be meshed at a non-meshing rate similar to that of a single starter without being affected by other meshing starters. When all the starters mesh, the AND signal causes the mainstream current to flow into each armature coil and rotate the engine. That is, it is possible to improve the non-meshing ratio and prevent the ring gear from being damaged.

[Brief description of drawings]

FIG. 1 is a circuit diagram illustrating an embodiment of a starter synchronous switch of the present invention.

FIG. 2 is a circuit diagram illustrating a conventional starter synchronous switch.

[Explanation of symbols]

Ci Coil input terminal Sw a
Contact Si Suction coil output terminal Wi Battery output terminal Swib Contact Mi Battery input terminal Bi Battery input terminal 3 Battery Mgi Magnetic switch

Claims (1)

[Scope of utility model registration request] 1. A magnetic switch Mgi comprising at least a coil input terminal Ci, a battery input terminal Bi, a battery output terminal Wi and a suction coil output terminal Si.
And a plurality of starters each comprising a motor having a battery input terminal Mi, for each starter, between the suction coil output terminal Si and the battery input terminal Mi, from the battery output terminal Wi of the starter. B contact Swi which is turned off by the electric current of is provided, and for all starters, battery input terminals Mi of all starters
2. A starter synchronous switch characterized by comprising an a contact Sw that is turned on only when there is a current from all the battery output terminals Wi between the battery 3 and the battery 3.