Method of producing a flat commutator
First Claim
1. Process for manufacturing a flat commutator comprising a metallic supporting body with segment supporting structure connected to a carbon ring wheel having segments and a plastic hub covering a central bore of the supporting body, said process comprising the following steps:
- (a) providing the supporting body with a plurality of identical grooves on a side of the supporting body which faces away from the carbon ring wheel, the grooves radially extending from an edge of the central bore to an outer edge and being spaced by an angle defined by a segmentation of the supporting body, the grooves being open to the side of the supporting body which faces away from the carbon ring wheel and having a depth smaller than a thickness of the supporting body and a width greater than an air gap present with a separation of the ring wheel into segments;
(b) forming the hub;
(c) reducing the thickness of the supporting body in an area forming a contact surface for the ring wheel until all segment supporting structures are completely electrically separated from each other through the grooves, and a plastic material filling the grooves in the contact surface is free;
(d) connecting the ring wheel to the segment supporting structures of the supporting body; and
(e) separating the ring wheel into segments corresponding to the segmentation of the supporting body.
4 Assignments
0 Petitions
Accused Products
Abstract
A method of manufacturing a flat commutator comprising the steps of providing a support member having segment carrier parts; forming identical grooves in one side of said support member extending radially from the center of the support member, moulding a hub around the grooved support member with moulding compound entering the grooves; reducing the thickness of the support member from the ungrooved or abutment side of the support member until the support member is divided into a plurality of electrically isolated segment carrier parts with the moulding compound exposed in each groove; bonding an annular disc of carbon to the segment carrier parts and dividing said disc into a plurality of commutator segments.
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Citations
7 Claims
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1. Process for manufacturing a flat commutator comprising a metallic supporting body with segment supporting structure connected to a carbon ring wheel having segments and a plastic hub covering a central bore of the supporting body, said process comprising the following steps:
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(a) providing the supporting body with a plurality of identical grooves on a side of the supporting body which faces away from the carbon ring wheel, the grooves radially extending from an edge of the central bore to an outer edge and being spaced by an angle defined by a segmentation of the supporting body, the grooves being open to the side of the supporting body which faces away from the carbon ring wheel and having a depth smaller than a thickness of the supporting body and a width greater than an air gap present with a separation of the ring wheel into segments; (b) forming the hub; (c) reducing the thickness of the supporting body in an area forming a contact surface for the ring wheel until all segment supporting structures are completely electrically separated from each other through the grooves, and a plastic material filling the grooves in the contact surface is free; (d) connecting the ring wheel to the segment supporting structures of the supporting body; and (e) separating the ring wheel into segments corresponding to the segmentation of the supporting body. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification