Device for connecting and insulating a thermal protector for electrical windings of motors

• US 6,744,160 B2
• Filed: 10/21/2002
• Issued: 06/01/2004
• Est. Priority Date: 03/01/2001
• Status: Expired due to Fees

• Current Assignee: Inarca S.p.A.
• Original Assignee: Inarca S.p.A.
• Inventors: Piovesan, Gianni
• Primary Examiner(s): MULLINS, BURTON S
• Application Number:
  US10/258,129
• Publication Number:
  US 20030060093A1
• Time in Patent Office: 589 Days
• Field of Search: 310/68.C, 310/71, 361/22, 361/23, 361/25, 337/380, 337/381
• US Class Current: 310/68.00C
• CPC Class Codes: H02K 11/25 Devices for sensing temperature, or actuated thereby
• CPC Class Codes: H02K 5/22 Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132

Abstract

A device for connecting and insulating a thermal protector for electrical winding of motors, comprising a tray-like shell made of a plastic material, which contains the protector and is provided with one or more terminals for electrical contact with the power supply of the motor to which it is applied; the contacts protrude from the shell, which has one or more tabs and locators which are applied by anchoring, in suitable and complementary regions of the spools of the windings of the motor enclosed in a plastic cover.

Claims

1. A device for connecting and insulating a thermal protector for electrical windings of motors, comprising a tray-like shell made of a plastic material, which contains the protector and is provided with one or more terminals for electrical contact with the power supply of a motor to which it is applied, said one or more terminals protruding from said shell, said shell having one or more tabs and locators which can be fixed within complementary regions of the spool of the windings of the motor enclosed in a plastic cover wherein said one or more electrical contact terminals are constituted by a corresponding number of rigid and spaced apart laminas preventing any short-circuit contacts, said laminas protruding from said shell and being partially accommodated and rested in channels formed in said shell.

2. The device according to claim 1, wherein said shell is shaped, at the edges related to an access opening, so as to form one or more elastic cantilevered tongues for the locking and unlocking of said thermal protector, said cantilevered tongues being directed towards the inside of said shell.

3. The device according to claim 1, wherein said one or more tabs are constituted by a tooth which protrudes from said shell in the vicinity of said electrical contact terminals and substantially at right angles to the surface of the shell containing said thermal protector to be fixed on said electric motor, said tooth being adapted to enter a seat formed in a head of the spool for the windings of said electric motor.

4. The device according to claim 1 further comprising a cover provided with a locking tooth for closing and unclosing said shell, wherein said cover is provided with a protruding centering locator.

5. The device according to claim 1, wherein a cover of the motor has feet which keep said thermal protector pressed against the bottom of said shell without a cover.

6. The device according to claim 1, further comprising a plate-like wing which protrudes monolithically from said head of the spool and is arranged so as to be interposed between said electric terminals so as to prevent any short-circuit contacts thereof by said laminas that protrude from said protector.

7. The device according to claim 6, wherein said wing is normally arranged parallel to said protector, below the laminas, and can be folded parallel to said electrical terminals being connected to the head by way of a film hinge.