Engaging relay for starter devices

• US 5,677,656 A
• Filed: 06/19/1995
• Issued: 10/14/1997
• Est. Priority Date: 12/18/1992
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Boegner, Karlheinz, Mauch, Fritz, Mayer, Martin
• Primary Examiner(s): DONOVAN, LINCOLN D
• Application Number:
  US08/481,439
• Time in Patent Office: 848 Days
• Field of Search: 335/126, 335/131
• US Class Current: 335/126
• CPC Class Codes: H01H 47/22 for supplying energising current for relay coil
• CPC Class Codes: H01H 51/065 Relays having a pair of normally open contacts rigidly fixed to a magnetic core movable along the axis of a solenoid, e.g. relays for starting automobiles details H01H50/20

Abstract

An engaging relay for starter devices of internal combustion engines as a pull-in winding of which is to be switched on via an auxiliary relay. It is provided for the purpose of a space saving, cost effective arrangement and design of the auxiliary relay that the auxiliary relay is arranged in the contact space of the engaging relay. One end of its relay winding is electrically connected in this case to the magnet core, which conducts frame potential, of the engaging relay, and the other end is electrically connected to a connecting part fastened in the switch cover of the engaging relay. A starter switch for the internal combustion engine is to be connected to this connecting part, which is constructed as a terminal, in order to switch on the engaging relay via the auxiliary relay integrated in it.

Claims

1. An engaging relay for starter devices of internal combustion engines, comprising a pull-in winding and a holding winding;

switching contacts;

a contact bridge which cooperates with said switching contacts;

an armature;

a linkage arranged so that by switching on said pull-in winding and said holding winding said armature engages via said linkage a pinion of a starter device in a gear ring of an internal combustion engine, and switches on a main circuit of a starter motor of the starter device via said contact bridge which cooperates with said switching contacts;

a switching bolt actuated by said armature and having an end at which said contact bridge is arranged;

an auxiliary relay being arranged in said contact space and having a relay contacts such that at least said pull-in winding is switched by said relay contacts;

means forming a contact space covered by a switch cover having a connecting part and arranged so that said switching bolt projects into said contact space;

a magnet core which closes said contact space toward said pull-in and said holding windings, said switching bolt projecting through said magnet core and through said auxiliary relay, said auxiliary relay being arranged in said contact space and having a relay winding with one end connected in said contact space to said magnet core which conducts frame potential and with another end is contacted to said connecting part fastened in said switch cover.

2. An engaging relay as defined in claim 1, wherein said auxiliary relay is permanently arranged on said magnet core.

3. An engaging relay as defined in claim 1, wherein said auxiliary relay is arranged below said contact bridge on said magnet core concentrically around said switching bolt which is actuated by said armature.

4. An engaging relay as defined in claim 1;

and further comprising an insulating bushing fastened on an end of said switching bolt so as to accommodate said contact bridge;

a magnet core sleeve; and

a winding support arranged so that said relay winding of said auxiliary relay is pushed with said winding support onto said magnet core sleeve.

8. An engaging relay as defined in claim 1;

and further comprising a pin mounted in said magnet core and displaced in an axial direction of said armature, said pin projecting into a working air gap between said magnet core and said armature and opening said relay contacts of said auxiliary relay when said armature is pulled in.

5. An engaging relay for starter devices of internal combustion engines, comprising a pull-in winding and a holding winding;

switching contacts;

a contact bridge which cooperates with said switching contacts;

an armature;

a linkage arranged so that by switching on said pull-in winding and said holding winding said armature engages via said linkage a pinion of a starter device in a gear ring of an internal combustion engine, and switches on a main circuit of a starter motor of the starter device via said contact bridge which cooperates with said switching contacts;

a switching bolt actuated by said armature and having an end at which said contact bridge is arranged;

an auxiliary relay having a relay contacts such that at least said pull-in winding is switched by said relay contacts;

means forming a contact space covered by a switch cover having a connecting part and arranged so that said switching bolt projects into said contact space;

a magnet core which closes said contact space toward said pull-in and said holding windings, said switching bolt projecting through said magnet core and through said auxiliary relay, said auxiliary relay being arranged in said contact space and having a relay winding with one end connected in said contact space to said magnet core which conducts frame potential and with another end is contacted to said connecting part fastened in said switch cover, an insulating bushing fastened on an end of said switching bolt so as to accommodate said contact bridge;

a magnet core sleeve;

a winding support arranged so that said relay winding of said auxiliary relay is pushed with said winding support onto said magnet core sleeve; and

a U-shaped magnet bracket accommodating said relay winding and having a yoke provided with a hole and a limb, said magnet core sleeve being fastened in said hole of said yoke of said magnet bracket, said limb having one end supporting a clapper-type armature which has a resetting spring and a free end having a contact spring with a contact bridge of said auxiliary relay which cooperates with said relay contacts.

6. An engaging relay as defined in claim 5, wherein said insulating plate is provided with at least one conductor track which is connected to one of said relay contacts of said auxiliary relay and to at least one end of said pull-in winding.

7. An engaging relay as defined in claim 6, wherein another of said relay contacts and said auxiliary relay is connected to one of said switching contacts so that starting from said conductor track of said insulating plate a conductor is led through said switch cover;

and a terminal lug which is permanently screwed from outside on said one switching contact and contacted with said conductor.

10. An engaging relay as defined in claim 5;

and further comprising a winding support, said magnet core of said engaging relay carrying toward said contact space an insulating plate on which said magnet bracket with said magnet core sleeve and said winding support with said relay winding and said relay contacts are fastened.

9. An engaging relay for starter devices of internal combustion engines, comprising a pull-in winding and a holding winding;

switching contacts;

a contact bridge which cooperates with said switching contacts;

an armature;

a linkage arranged so that by switching on said pull-in winding and said holding winding said armature engages via said linkage a pinion of a starter device in a gear ring of an internal combustion engine, and switches on a main circuit of a starter motor of the starter device via said contact bridge which cooperates with said switching contacts;

a switching bolt actuated by said armature and having an end at which said contact bridge is arranged;

an auxiliary relay having a relay contacts such that at least said pull-in winding is switched by said relay contacts;

means forming a contact space covered by a switch cover having a connecting part and arranged so that said switching bolt projects into said contact space;

a magnet core which closes said contact space toward said pull-in and said holding windings, said switching bolt projecting through said magnet core and through said auxiliary relay, said auxiliary relay being arranged in said contact space and having a relay winding with one end connected in said contact space to said magnet core which conducts frame potential and with another end is contacted to said connecting part fastened in said switch cover, said relay contacts being formed as make contacts, said auxiliary relay being connected to one of said switching contacts for connecting a motor vehicle battery and also connected to said pull-in winding and said contact space.

11. An engaging relay for starter devices of internal combustion engines, comprising a pull-in winding and a holding winding;

switching contacts;

a contact bridge which cooperates with said switching contacts;

an armature;

a linkage arranged so that by switching on said pull-in winding and said holding winding said armature engages via said linkage a pinion of a starter device in a gear ring of an internal combustion engine, and switches on a main circuit of a starter motor of the starter device via said contact bridge which cooperates with said switching contacts;

a switching bolt actuated by said armature and having an end at which said contact bridge is arranged;

an auxiliary relay having a relay contacts such that at least said pull-in winding is switched by said relay contacts;

means forming a contact space covered by a switch cover having a connecting part and arranged so that said switching bolt projects into said contact space;

a magnet core which closes said contact space toward said pull-in and said holding windings, said switching bolt projecting through said magnet core and through said auxiliary relay, said auxiliary relay being arranged in said contact space and having a relay winding with one end connected in said contact space to said magnet core which conducts frame potential and with another end is contacted to said connecting part fastened in said switch cover, said pull-in winding and said holding winding each having one end connected to one of said relay contacts of said auxiliary relay in said contact space, said pull-in winding having another end connected to one of said switching contacts leading to the starter motor and said holding winding having another end connected to said magnet core which conducts frame potential.