Fuse assembly

• US 10,403,462 B2
• Filed: 04/12/2018
• Issued: 09/03/2019
• Est. Priority Date: 04/18/2017
• Status: Active Grant

• Current Assignee: Aptiv Technologies AG (Aptiv PLC)
• Original Assignee: Delphi Technologies LLC (BorgWarner Incorporated)
• Inventors: Allcorn, James Randall, Smith, Donald Gary, Mosby, William J.
• Primary Examiner(s): Vortman, Anatoly
• Assistant Examiner(s): Sul, Stephen S
• Application Number:
  US15/951,501
• Publication Number:
  US 20180301310A1
• Time in Patent Office: 509 Days
• Field of Search: 361150, 361168, 361191, 361227
• CPC Class Codes: H01H 2085/025 Structural association with a binding post of a storage battery
• CPC Class Codes: H01H 2085/0555 Input terminal connected to a plurality of output terminals, e.g. multielectrode
• CPC Class Codes: H01H 2085/2055 Connections to bus bars in an installation with screw in type fuses or knife blade fuses
• CPC Class Codes: H01H 85/044 General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified H01H85/046 - H01H85/048 take precedence
• CPC Class Codes: H01H 85/06 characterised by the fusible material H01H85/11 takes precedence
• CPC Class Codes: H01H 85/143 Electrical contacts; Fastening fusible members to such contacts
• CPC Class Codes: H01H 85/20 Bases for supporting the fuse; Separate parts thereof
• CPC Class Codes: H01H 85/205 Electric connections to contacts on the base

Abstract

A fuse assembly includes an insulating block having an upper surface, a lower surface, and a side surface therebetween. The insulating block defines cavities extending therethrough. Each cavity defines a resilient lock arm. A fuse assembly also includes a first terminal stud secured within a first cavity by a first lock arm, a second terminal stud secured within a second cavity by a second lock arm, and a bus bar disposed parallel to the bottom surface of the insulating block. The bus bar is interconnected to the first terminal stud by a lower terminal connected to the bus bar and an upper terminal disposed parallel to the upper surface. The bus bar is interconnected to the second terminal stud by a fusible link having a lower fuse terminal connected to the bus bar and an upper fuse terminal disposed generally parallel to the upper surface.

Claims

1. A fuse assembly, comprising:

an insulating block having an upper surface, a lower surface, and a side surface therebetween, said insulating block defining a first cavity extending therethrough from the lower surface to the upper surface, wherein inner side walls of the first cavity define a first pair of resilient lock arms, said insulating block further defining a second cavity extending therethrough from the lower surface to the upper surface, wherein inner side walls of the second cavity define a second pair of resilient lock arms;

a first terminal stud protruding from the upper surface and secured within the first cavity by the first pair of lock arms;

a second terminal stud protruding from the upper surface and secured within the second cavity by the second pair of lock arms; and

a bus bar disposed generally parallel to the lower surface of the insulating block, wherein the bus bar is interconnected to the first terminal stud by an integral conductor having a lower terminal connected to the bus bar and an upper terminal disposed generally parallel to the upper surface, said upper terminal defining a first aperture in which the first terminal stud is received and wherein the bus bar is interconnected to the second terminal stud by an integral fusible link having a lower fuse terminal connected to the bus bar and an upper fuse terminal disposed generally parallel to the upper surface, said upper fuse terminal defining a second aperture in which the second terminal stud is received.

2. The fuse assembly in accordance with claim 1, wherein the bus bar is secured to the insulating block by a locking tab defined by the lower surface that is received within an aperture defined by the bus bar.

3. The fuse assembly in accordance with claim 2, wherein a junction of the side surface and the lower surface is rounded.

4. The fuse assembly in accordance with claim 3, wherein the fusible link is disposed generally parallel to the side wall.

5. The fuse assembly in accordance with claim 3, wherein the fusible link is encapsulated within a polymeric insulative material.

6. The fuse assembly in accordance with claim 1, wherein the first terminal stud defines a generally planar base plate oriented generally perpendicular to the first terminal stud and wherein the first pair of lock arms secures the base plate within the first cavity.

7. The fuse assembly in accordance with claim 1, wherein the first pair of lock arms is in the form of a pair of cantilevered beams.

8. The fuse assembly in accordance with claim 7, wherein the pair of cantilevered beams are angled inwardly at an angle less than 45 degrees.

9. The fuse assembly in accordance with claim 8, wherein the cantilevered beams of the first pair of lock arms define triangular shaped lock tabs near free ends of the first pair of lock arms.

10. The fuse assembly in accordance with claim 9, wherein the lock tabs define locking surfaces generally parallel to the upper surface of the insulating block, said locking surfaces engage the base plate and inhibit removal of the first terminal stud from the first cavity.

11. The fuse assembly in accordance with claim 10, wherein the first aperture is smaller than the base plate and wherein the base plate is disposed between the upper surface and the lock tabs.

12. The fuse assembly in accordance with claim 1, wherein the second pair of lock arms is in the form of a pair of cantilevered beams.

13. The fuse assembly in accordance with claim 12, wherein the pair of cantilevered beams are angled inwardly at an angle less than 45 degrees.

14. The fuse assembly in accordance with claim 13, wherein the second terminal stud defines a generally planar base plate oriented generally perpendicular to the second terminal stud and wherein the second pair of lock arms secures the base plate within the second cavity.

15. The fuse assembly in accordance with claim 14, wherein the cantilevered beams of the second pair of lock arms define a triangular shaped lock tabs near free ends of the second pair of lock arms.

16. The fuse assembly in accordance with claim 15, wherein the lock tabs define locking surfaces generally parallel to the upper surface of the insulating block, said locking surfaces engage the base plate and inhibit removal of the second terminal stud from the second cavity.

17. The fuse assembly in accordance with claim 16, wherein the second aperture is smaller than the base plate and wherein the base plate is disposed between the upper surface and the lock tabs.

18. A method of manufacturing a fuse assembly, comprising the step of:

forming an insulating block having an upper surface, a lower surface, and a side surface therebetween, said insulating block defining a first cavity extending therethrough from the lower surface to the upper surface, wherein inner side walls of the first cavity define a first pair of resilient lock arms, said insulating block further defining a second cavity extending therethrough from the lower surface to the upper surface, wherein inner side walls of the second cavity define a second pair of resilient lock arms;

forming a first terminal stud protruding from the upper surface and secured within the first cavity by the first pair of lock arms;

forming a second terminal stud protruding from the upper surface and secured within the second cavity by the second pair of lock arms; and

forming a bus bar disposed generally parallel to the lower surface of the insulating block, wherein the bus bar is interconnected to the first terminal stud by an integral conductor having a lower terminal connected to the bus bar and an upper terminal disposed generally parallel to the upper surface, said upper terminal defining a first aperture in which the first terminal stud is received and wherein the bus bar is interconnected to the second terminal stud by an integral fusible link having a lower fuse terminal connected to the bus bar and an upper fuse terminal disposed generally parallel to the upper surface, said upper fuse terminal defining a second aperture in which the second terminal stud is received.