DC MOTOR

• US 20120043834A1
• Filed: 12/14/2009
• Published: 02/23/2012
• Est. Priority Date: 02/09/2009
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Krauth, Wolfgang, Koenig, Tilo
• Granted Patent: US 8,884,484 B2
• Time in Patent Office: Days
• US Class Current: 310/43
• CPC Class Codes: H02K 3/47 Air-gap windings, i.e. iron-free windings

Abstract

The invention relates to a DC motor 1 comprising a cylindrical coil carrier 7; 17 comprising wire guide element 9; 10, 12 for guiding a first winding wire 80; 180 and a second winding wire 81; 181 of an air-gap winding on both side end sections, wherein the first winding wire 80; 180 and the second winding wire 81; 181 each comprise rectangular winding segments 20; 120, wherein the rectangular winding segments 20; 120 of the second winding wire 81; 181 are disposed overlapping on the cylindrical coil carrier 7; 17 and the wire guide elements 9; 10, 12 are designed for guiding the first winding wire 80; 180 and the second winding wire 81; 181 past each other.

Claims

1. A DC motor comprising a cylindrical coil carrier (7;

17) comprising wire guide elements (9;

10, 12) for guiding a first winding wire (80;

180) and a second winding wire (81;

181) of an air-gap winding on both side end sections (201, 202), characterized in that the first winding wire (80;

180) and the second winding wire (81;

181) each comprise rectangular winding segments (20;

120), wherein the rectangular winding segments (20;

120) of said first winding wire (80;

180) and the rectangular winding segments (20;

120) of said second winding wire (81;

181) are disposed overlapping on the cylindrical coil carrier (7;

17) and the wire guide elements (9;

10, 12) are designed for guiding said first winding wire (80;

180) and said second winding wire (81;

181) past each other.

2. The DC motor according to claim 1, characterized in that further winding wires are provided aside from the first winding wire (80;

180) and the second winding wire (81;

181).

3. The DC motor according to claim 1, characterized in that both of the side end sections (201, 202) of the coil carrier (17) are pluggable and of annular design.

4. The DC motor according to claim 3, characterized in that both of the side end sections (201, 202) of the coil carrier (17) are connected to one another via an annular member (13), wherein the annular member (13) has a smaller diameter than the end sections (201, 202) and a laminated sheet package (6) is disposed in the region of said annular member (13).

5. The DC motor according to claim 1, characterized in that an end section (201, 202) of the coil carrier (17) is lid-like, a bearing seat (14) having a bore hole (19) being centrally located on said end section.

6. The DC motor according to claim 1, characterized in that both of the side end sections (201, 202) of the coil carrier (17) comprise in each case a regular arrangement of support brackets (10) serving as wire guide elements (10, 12), wherein the first and the second winding wire (180, 181) are alternately guided laterally along the support brackets (10) and on said support brackets (10), said support brackets (10) having in each case a u-shaped groove (11) for fixing said first and second winding wire (180, 181) which are guided on said support bracket (10).

7. The DC motor according to claim 1, characterized in that knobs (12) are provided on both side end sections (201, 202) of the coil carrier (17) to serve as wire guide elements (10, 12), wherein the first and the second winding wire (180, 181) are alternately guided along the knobs (12) and wherein said knobs (12) are disposed on both of the side end sections (201, 202) such that the overall length of said first winding wire (180) and said second winding (181) is preferably the same.

8. The DC motor according to claim 1, characterized in that the coil carrier (7) comprises four annular fixing elements (701, 702, 711, 712) and a regular, spaced arrangement of top pieces (9) serving as wire guide elements (9), wherein the fixing elements (701, 702, 711, 712) are disposed offset to one another such that the top pieces (9) lie opposed to segments without the same, wherein the first winding wire (80) is guided over the top pieces (9) of the first fixing elements (701, 711) and the second winding wire (81) is guided over the top pieces (9) of the second fixing elements (702, 712) and wherein said fixing elements (701, 702, 711, 712) are disposed on both sides of a laminated sheet package (6).

9. The DC motor according to claim 1, characterized in that the coil carrier (7;

17) is made from plastic.