DE1601448C

DE1601448C - Electric starter motor for internal combustion engines with electromagnetic pinion engagement device

Info

Publication number: DE1601448C
Application number: DE19671601448
Authority: DE
Inventors: Mieczyslaw Birmingham Zagrzjewski (Großbritannien)
Original assignee: Joseph Lucas Industries Ltd
Current assignee: ZF International UK Ltd
Priority date: 1966-09-09
Filing date: 1967-08-30
Publication date: 1973-03-22

Description

auf, die an ihrem äußersten Ende eine auf der Stange festsitzende Druckscheibe 16 trägt und von einer Hülse 17 umschlossen ist. Auf der Stange 15 ist ferner eine Druckscheibe 18 verschiebbar gelagert, die von einer ersten Feder 19 an die Hülse 17 herangedrückt wird. Die Feder 19 ist zwischen der Druckscheibe 18 und dem Gehäuse eingespannt. Ferner ist eine zweite Feder 30 zwischen der Druckscheibe 18 und der Schulter am Übergang von der Stange 15 zum Rest des Tauchkernes 13 angeordnet.on, which carries at its outermost end a fixed on the rod thrust washer 16 and of a Sleeve 17 is enclosed. On the rod 15, a thrust washer 18 is also slidably supported by a first spring 19 is pressed against the sleeve 17. The spring 19 is between the pressure disk 18 and clamped in the housing. Furthermore, a second spring 30 is between the thrust washer 18 and the Shoulder arranged at the transition from the rod 15 to the rest of the plunger core 13.

Ein nicht gezeichneter Einrückhebel, der ein gegabeltes Ende besitzt, ist zwischen der Druckscheibe 18 und der Druckscheibe 16 eingespannt zu denken. Der Hebel ist drehbeweglich gelagert und mit seinem anderen Ende an ein Ritzel (nicht gezeigt) angeschlossen, das in axialer Richtung in den Zahnkranz der zu startenden Brennkraftmaschine bewegbar ist. Die Hülse 17 dient dazu, die Bewegung der Druckscheibe 18 in Richtung auf die Scheibe 16 zu begrenzen, um den Einbau des Hebels am Betätigungsmagnet zu erleichtern. Wenn der Hebel angebracht ist, ist zwischen der Druckscheibe 18 und der Hülse 17 ein axialer Abstand vorhanden.An engaging lever, not shown, which has a forked end, is between the pressure disk 18 and think of the thrust washer 16 clamped. The lever is rotatably mounted and with its other End connected to a pinion (not shown), which in the axial direction in the ring gear of the starting internal combustion engine is movable. The sleeve 17 serves to facilitate the movement of the thrust washer 18 to limit in the direction of the disc 16 in order to facilitate the installation of the lever on the actuating magnet. When the lever is attached, there is an axial distance between the thrust washer 18 and the sleeve 17 present.

Wenn die Brennkraftmaschine angelassen werden soll, wird der Anlaßschalter betätigt und damit der Betätigungsmagnet erregt, so daß der Tauchkern 13 gegen die Kraft der Feder 19 nach rechts verschoben wird. Durch diese axiale Bewegung des Tauchkernes wird der Einrückhebel verschwenkt, so daß das Ritzel in Eingriff mit dem Zahnkranz gebracht wird, deichzeitig mit dem Einrücken des Ritzels in den Zahnkranz bewegt der Tauchkern 13 die Stange 21 in eine solche Stellung, daß die Kontakte 31 durch die Platte 26 überbrückt werden, so daß der elektrische Andrehmotor eingeschaltet wird, der dann das Ritzel antreibt. Sollte das Ritzel Zahn auf Zahn an dem Zahnkranz anstoßen, setzt der Hebel seine Bewegung auf Grund einer Leergangverbindung mit dem Ritzel fort, so daß die Kontakte 31 geschlossen bleiben, und der Andrehmotor bewegt das Ritzel derart, daß es in den Zahnkranz eingreift.When the internal combustion engine is to be started, the starter switch is actuated and thus the Actuating magnet energized, so that the plunger 13 is moved against the force of the spring 19 to the right will. By this axial movement of the plunger, the engagement lever is pivoted so that the pinion is brought into engagement with the ring gear, deichzeit with the engagement of the pinion in the ring gear, the plunger 13 moves the rod 21 into a such a position that the contacts 31 are bridged by the plate 26, so that the electric starting motor is switched on, which then drives the pinion. The pinion should be tooth on tooth on the ring gear push, the lever continues its movement due to a backlash connection with the pinion, so that the contacts 31 remain closed, and the starting motor moves the pinion so that it is in the ring gear intervenes.

Wenn die Brennkraftmaschine gezündet hat, wird das Ritzel aus dem Zahnkranz herausgeworfen, und wenn der Anlaßschalter freigegeben worden ist, kehren die Teile des Betätigungsmagneten durch die verschiedenen Federn in die gezeigte Stellung zurück. Wenn jedoch der Anlaßschalter freigegeben wird, bevor die Brennkraftmaschine gezündet hat, bleibt das Ritzel noch in Eingriff mit dem Zahnkranz, so daß sich der Hebel nicht bewegen kann und die Druckscheibe 18 in Arbeitsstellung festliegt, so daß trotz Abschaltung des Betätigungsmagneten der Stromkreis des Andrehmotors noch geschlossen bleibt. Bei einem solchen Zustand bewirken jedoch die Federn 24, 28 über die Stange 21, daß der Tauchkern 13 gegen die Kraft der Feder 30 verschoben wird, so daß die Kontakte unterbrochen werden, obwohl die Druckscheibe 18 in ihrer Lage verbleibt. Sobald die Kontakte 31 unterbrochen sind, wird das Ritzel durch die Feder 19 ausgerückt.When the internal combustion engine has ignited, the pinion is thrown out of the ring gear, and when the starter switch has been released, the parts of the operating magnet sweep through the various Springs back to the position shown. However, if the starter switch is released before the internal combustion engine has ignited, the pinion still remains in engagement with the ring gear, so that the lever can not move and the thrust washer 18 is fixed in the working position, so that in spite of Switching off the actuating magnet, the electric circuit of the starting motor remains closed. At a such a state, however, the springs 24, 28 via the rod 21 that the plunger 13 against the Force of the spring 30 is displaced so that the contacts are interrupted, although the pressure disc 18 remains in place. As soon as the contacts 31 are interrupted, the pinion is activated by the spring 19 disengaged.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

Claim:

Electric starter motor for internal combustion engines with thrust drive and one of the latter causing electrical actuation magnet, the one lying in the circuit of the starting motor Actuated switch and the plunger core slidably mounted in a housing and from a first The spring is loaded towards its rest position, with a winding that opposes the plunger the action of the first spring shifts, with the contacts switching on the starting motor, the are closed with the magnetically triggered movement of the plunger, with suspension elements, which load the contacts in the direction of their open position, with one on the plunger core displaceably arranged first pressure disc, with a second spring between the «first Thrust washer and the plunger core, and with one between the first thrust washer and one on the Plunger core set the second thrust washer clamped engagement lever that when moving of the plunger core in the working position, the starting pinion with a ring gear of the internal combustion engine brings into engagement, created by the first thrust washer and the second spring a backlash is such that the plunger core under the action of the spring elements returns into the position with open contacts is permitted if the engagement lever has not been activated The disengagement of the pinion from the ring gear holds the first pressure disc in the working position, characterized in that the first Spring (19) between the displaceable first thrust washer (18) and the housing (11) of the actuating magnet is clamped.

4040

The invention relates to an electric starter motor for internal combustion engines with thrust drive and one of the latter causing electrical actuation magnet, the one in the circuit of the starter motor lying switch operated and the plunger core slidably mounted in a housing and from a first spring is loaded in the direction of its rest position, with a Wicklüjtig,;. which Gegenidje the plunger core Effect of the first spring shifts, with the contacts switching on the starting motor, which in the case of the magnetic triggered movement of the plunger are closed, with spring elements that the contacts load in the direction of their open position, with a slidably arranged on the plunger core first pressure disc, with a second spring between the first pressure disc and the plunger core, ■ and with a second pressure washer fixed between the first pressure washer and a second pressure washer attached to the plunger clamped engagement lever, which when moving the plunger in the working position, the starting pinion brings into engagement with a ring gear of the internal combustion engine, whereby through the first thrust washer and the second spring a Leergano is created, such that the plunger under the action of Suspension elements to return to the position with the contacts open is allowed. when the engagement lever due to the pinion not disengaging from the ring gear, the first thrust washer in Working position.

The said first thrust washer presses on the engagement lever when the pinions are disengaged should, the second pressure disc presses on this lever for the purpose of meshing. The expression "Disk" is used for brevity only; Deviations from the pure disc shape, e.g. B. Plate shape are easily possible.

A starting motor with an actuating magnet of the aforementioned type is disclosed in additional patent specification 66 258 known for French patent specification 1091477 and can also be seen from German patent specification 1,287,856. In these known designs, the axial position of the plunger is only determined by the relative strengths of the two springs. The strength of the first spring must be such that it is overcome by the strengths of the second spring and the suspension elements can be, otherwise the plunger is moved too far out of the housing, so that the Strength of this spring is limited. In practice it was therefore always necessary to make this spring weaker than actually required to choose, so that as a result of the torque motor vibration and increased Wear and tear were the result.

The invention addresses this disadvantage to eliminate.

The object is achieved in that the first spring between the displaceable first pressure disc and the housing of the actuating magnet is clamped.

Since the first spring now acts on the movable first thrust washer, the axial position of the Plunger core determined by the engagement lever and the first spring when the actuating magnet is switched off can be chosen as strong as required.

The invention will be explained in more detail below with reference to the drawing.

The drawing shows an embodiment of the invention in longitudinal section.

The actuating magnet has a housing 11 which carries a winding 12 and in which a plunger 13 is displaceable in the axial direction. The housing also carries a contact arrangement, the total with the item number 14 is provided. This contact arrangement comprises an axially displaceable rod 21. one end of which is displaceable in a bore in the pole piece 20 of the actuating magnet and out of this protrudes and the other end of which can be displaced in a bore in an insulating cap 29 on the end face which is attached to the housing 11. On the rod 21 is a pair of cup-shaped parts 22, 23 arranged. A spring 24 is connected between the part 22 and an insulating sleeve 25 which is connected to engages a contact plate 26 which rests in the axial direction on an insulating disk 27, so that the Spring 24 presses the entire assembly 25, 26, 27 against part 23. Another suspension element 28 is clamped between the part 23 and the end cap 29. The end cap 29 carries a pair diametrically opposing contacts 31 which are bridged by the plate 26 when the rod 21 is axially displaced by the plunger 13 when the actuating magnet is excited.

At the end opposite the contact arrangement 14, the plunger core 13 has an integral one on a shaped rod 15 of reduced diameter