DE470823C - Electric starter for internal combustion engines - Google Patents

Description

The invention relates to electric starters for compression engines which a pinion driven by an electric motor by axial displacement electromagnetically is connected to a part that is connected to the crankshaft in inevitable connection is or is attached to it. With most of these arrangements the pinion is ejected by helical wedges or teeth when the machine starts. It arises when the Driver does not instantly turn off the power, a rattling noise because of that Pinion tries to jump in again! The noise is not only uncomfortable, but the Teeth can also suffer damage.

The following arrangement has been suggested as a remedy:

The system has one main circuit between the battery and the electric motor and three Control circuits, which are all connected in parallel and by closing one Switch, expediently a push button, can be controlled by the driver. The first circuit has one closed, the other two circuits each have one open Counter. The first circuit contains a solenoid or electromagnet that controls the Pinion engages, the armature windings and an auxiliary magnet winding of the motor. If the The first circuit is closed, the pinion engages and the motor starts slowly to run around. The axial movement of the pinion shaft closes the switch of the second circuit, and this energizes an electromagnet which closes the main circuit. The main closed circuit or the second Electric circuit, with which the third electric circuit always works, excites one Electromagnet that opens the switch of the first circuit and the switch of the keeps the third circuit closed or closes.

The subject of the invention is basically similar to the system described, but simpler and more reliable.

According to the invention, the switch is opened in the first control circuit and that The switch in the third control circuit is not closed directly by an electromagnet or a solenoid, but via a mechanical connection with the Switch the main circuit in such a way that when the main power switch is closed the switches in the first and third control circuit are opened or closed, while the reverse movement of the main power switch does not affect the switches of the first and third circuits.

According to the invention, a special device, solenoid or electromagnet, ram engagement of the pinion in the absence of grain

men by making the pinion axially displaceable on a shaft in the extension of the motor armature is arranged and against the action of a spring that disengages it from the seeks to keep the driven part, including the armature through one with the armature winding in Connected auxiliary magnet winding is engaged. When the machine starts, it takes the slowly running motor ίο with it, which reduces the amperage in the armature and also subsides in the auxiliary magnet winding, so that the spring ejects the pinion again can.

An exemplary embodiment is shown in the drawing of the subject matter of the invention. The course of the circuits is indicated by arrows indicated.

Arrow without spring: main circuit, arrow with a spring: first control circuit, arrow with two springs: second control circuit, arrow with three springs: third control circuit. The main circuit four binds the battery α to the motor b. On .einer extension of the motor shaft sits the pinion δ ¹ , whose connection with the shaft can allow an axial displacement of the pinion, but it always inevitably rotates. The pinion is held by a spring δ ⁴ on its shaft out of engagement with the part δ ² to be driven. The teeth of both parts can be somewhat helical to facilitate engagement. At the other end of the motor shaft there is a stop δ ³ which, when the auxiliary winding δ ^{5 is} excited and throws in the pinion δ ¹ against the action of the spring δ ⁴ , a switch c in the second control circuit closes. The second control circuit contains a solenoid or an electromagnet c ¹ with resistors ² . In a holder d ⁸ , a double-armed, conductive contact lever d is mounted such that it can swing against the action of a spring ⁹ around a pin d ^1. He wears on. one end a contact d ^{2 of} the third, at the 'other a contact ^ ^{3 of} the first control circuit. The anchor sits on the same pivot ^{1 «? 4 of} the solenoid or electromagnet c ¹ , which with a nose // ⁵ over the contact ä? ³ supporting end of the rocker arm d engages, carries a contact d ⁶ for the main circuit and a spring «? ⁷ on the solenoid or electromagnet c ¹ against a stop 6? ¹⁰ is printed on the frame ^{d s.}

The nose"? ⁵ is against the rocker arm «5? so arranged that when the anchor £? ⁴ goes down to close the contact d ⁶ in the main circuit, the nose grasps the rocker arm d , the contact ifi? ³ opens in the first control circuit and the contact d ^s closes in the third control circuit. But if the armature φ goes up, it does not disturb the rocker arm d.

The third control circuit contains a solenoid e, the contact e ^{x of which is} separated from the contact «? ² on the rocker arm ^ is closed. When the solenoid is energized, it holds the rocker arm d in place.

The driver controls the starter through the contact /. If this is closed, it closes the first control circuit. Since this contains the armature windings of the motor ö and the auxiliary magnetic winding δ ⁵ , the motor starts slowly, while at the same time its shaft is pulled to the left ^{by the auxiliary winding ö 5.} This brings the pinion δ ¹ into engagement with the part δ ² and closes the contacts through the stop δ ^3. This closes the second control circuit, excites the solenoid or the electromagnet c ¹ , the armature d ⁱ against, the effect of the springs? ⁷ tightened and the rocker arm d rotated through the nose // ⁵ so that the contact dP in the first control circuit is opened and the contact i? ^{2 is} closed in the third control circuit.

As soon as the machine starts up, the current ^{flowing through the winding δ 5} is initially weakened, so that the Federö ⁴ disengages the pinion δ ¹ again and releases the contacts for opening. The solenoid or the electromagnet c ¹ is de-energized, the spring ⁷ rotates the armature * up to the stop d ^ia and opens the contact d ^s in the main circuit. But the solenoid or the electromagnet e keeps the rocker arm d attracted for so long, the contact ί? ² closed in the third control circuit and the contact £? * Opened in the first control circuit until the driver releases the / contact and "the spring"? ⁹ brings the rocker arm ^ back into the position shown with closed contact d ^s and open contact ^ ² . The consequence of this is that the pinion δ ¹ does not try to jump in again even if the driver does not immediately release the contact / after the machine has started, since the first circuit with the winding δ ⁵ at the contact ^? ³ remains open.

Claims (3)

Patent sayings: i. Electric starter for internal combustion engines with a main circuit and three control circuits, characterized in that the first and third control circuits have a common rocker arm (d) which in one position opens one circuit and closes the other, and switches in reverse in the other position and with the armature - (d 4 =) of a solenoid or electromagnet (e ^{1 ) which controls the switch of the main circuit is in four-} bond so that the rocker arm is only taken along in one direction by the armature. ~. 47082a 2. Starter characterized by that and the armature (φ) axis are rotatable. 3. Starter marked by that Claim 1, characterized by the rocker arm ^) to have a common Claim 1, characterized in that the rocker arm (d) as a double lever, the armature (φ) is designed as a simple lever and has a nose (d ⁵ ) at the free end which, when the two levers are turned against each other, takes the rocker arm (d) with it in a certain direction. la 1 sheet of drawings