Power relay for a vehicle

Patent metadata

Field	Value
Publication number	US-9728360-B2
Application number	US-201615135827-A
Country	US
Kind code	B2
Filing date	Apr 22, 2016
Priority date	Apr 22, 2015
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A power relay for a vehicle has a housing and two connecting bolts that are introduced into the housing so as to contact a load current circuit. The power relay further having a coil assembly that is arranged in the housing, the coil assembly contains a magnetic coil and a magnetic armature that is coupled by way of a force-transferring member to a contact bridge that can be moved in a reversible manner between a closed position and an opened position and can be displaced in the housing under the effect of a magnetic field that is generated by the magnetic coil. The contact bridge supports two contact elements that together with the mating contacts of the connecting pin form a first contact pair and a second contact pair. The contact pairs form a three point bearing arrangement in the closed position.

First claim

The invention claimed is:

1. A power relay for a vehicle, comprising:
a housing;
two connecting bolts introduced into said housing so as to contact a load current circuit and having mating contacts;
two contact elements;
a coil assembly disposed in said housing, said coil assembly having a force-transferring member, a contact bridge, a magnetic coil and a magnetic armature being coupled by way of said force-transferring member to said contact bridge that can be moved between a closed position and an opened position and also can be displaced in said housing under an effect of a magnetic field that is generated by said magnetic coil, said contact bridge supporting said two contact elements which form a first contact pair and a second contact pair with said mating contacts of said connecting bolts, wherein said first and second contact pairs form a three point bearing configuration in the closed position; and
said first contact pair having a contact bridge-side contact element with a contact region being curved in a convex manner towards one of said mating contacts of said connecting bolts, said contact region being curved in said convex manner in a bridge longitudinal direction extends along said contact bridge-side contact element while forming a central, raised contact region so as to provide a bearing site.

2. The power relay according to claim 1 , wherein said first contact pair is embodied in such a manner that said first contact pair contains only a defined bearing site.

3. The power relay according to claim 1 , wherein said second contact pair is embodied in such a manner that said second contact pair contains two defined bearing sites.

4. The power relay according to claim 1 , wherein at least one of said mating contacts or said contact elements has a joining shaft and a circular-shaped contact surface head.

5. The power relay according to claim 1 ,
wherein said housing has a housing pot;
further comprising a connecting base being joined with said housing or can be in part inserted into said housing; and
wherein said connecting bolts are introduced into said housing.

6. The power relay according to claim 5 , wherein in an assembled state, said contact bridge sits at least in regions in said connecting base.

7. The power relay according to claim 1 , wherein at least one of said mating contacts or said contact elements has a joining shaft and a plate-shaped contact surface head.

8. A power relay for a vehicle, comprising:
a housing;
two connecting bolts introduced into said housing so as to contact a load current circuit and having mating contacts;
two contact elements;
a coil assembly disposed in said housing, said coil assembly having a force-transferring member, a contact bridge, a magnetic coil and a magnetic armature being coupled by way of said force-transferring member to said contact bridge that can be moved between a closed position and an opened position and also can be displaced in said housing under an effect of a magnetic field that is generated by said magnetic coil, said contact bridge supporting said two contact elements which form a first contact pair and a second contact pair with said mating contacts of said connecting bolts, wherein said first and second contact pairs form a three point bearing configuration in the closed position; and
said second contact pair containing a contact bridge-side contact element which has a contact region being inwardly curved in a concave manner in relation to one of said mating contacts of said connecting bolts, said contact region being inwardly curved in the concave manner in a bridge longitudinal direction extending along said contact bridge-side contact element while forming two raised contact regions that are adjacent thereto.

9. The power relay according to claim 8 , wherein said one mating contact of said connecting bolts has a planar bearing surface.

Assignees

• Ellenberger & Poensgen

Inventors

• Birner Markus
• Engewald Manuel
• Kraus Helmut

Classifications

• H01H51/065 Primary

  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) · CPC title

• H01H50/14 Primary

  Terminal arrangements {(for coils H01H50/443)} · CPC title

• H01H1/50

  Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position · CPC title

• H01H1/20

  Bridging contacts {(for circuit breakers H01H73/045)} · CPC title

• H01H50/04

  Mounting complete relay or separate parts of relay on a base or inside a case · CPC title