TH48832B - An AC generator circuit with air vents in the slip ring cover. - Google Patents

Abstract

DC60 (25/03/45) The AC generator circuit (1) for a vehicle will have a brush unit (5). The brush unit (5) will consist of brushes (51,52) held in place by sliding into contact with slip rings (37,38), springs (64, 65) for pressing the brushes, a brush holder (60) which has a section for receiving the brushes, and a slip ring cover (70) for covering the outer edge of the slip ring which is built on the rotating shaft (33). The slip ring cover (70) will include the first wall section (75) and the second wall section (76) which are generally shaped like an arc, and a cover section (72) for closing the ends in the direction Along the axial and lateral wall sections (77), the first wall section (75) and the second wall section (76) overlap each other, and an intake/exhaust port (79) is created between these wall sections (75,76). The AC generator circuit (1) for a vehicle will have a brush unit (5). The brush unit (5) will consist of brushes (51,52) held in contact with slip rings (37,38), springs (64, 65) for pressing the brushes, a brush holder (60) which has a section for receiving the brushes, and a slip ring cover (70) for covering the outer edge of the slip ring which is built on the rotating shaft (33). The slip ring cover (70) will include the first wall section (75) and the second wall section (76) which are generally shaped like an arc, and a cover section (72) for closing the ends in the direction of Along the axial and lateral wall sections (77), the first wall section (75) and the second wall section (76) overlap each other, and an intake/exhaust port (79) is created between these wall sections (75,76).

Claims (12)

1. The AC generator circuit (1) for the vehicle has the following components: a rotor (3) which has a rotating shaft (33), a field coil assembly (31) and slip rings (37,38) which are mounted on one end of the rotating shaft and electrically connected to the field coil assembly; and a brush unit (5) which has brushes (51,52) held in contact with the slip rings, springs (64,65) for pressing the brushes, a brush holder (60) which has a section for receiving the brushes and a slip ring cover (70) which covers the outer edge of the slip ring, in which the suction/discharge ports (79) are created in the lateral direction of the slip ring cover. 2. The AC generating circuit (1) as specified in claim 1, whereby the slip ring cover (70) shall have a first wall (75) constructed in a curved shape along a cross-section perpendicular to the rotating shaft, and a second wall (76) constructed within the first wall, and an intake/exhaust port (79) constructed between the first and second walls. 3. The AC generating circuit (1) as specified in claim 2, where the first wall (75) and the second wall (76) overlap in the peripheral direction and cover the suction/discharge port (79). 4. The AC generating circuit (1) as specified in claim 2 or 3, where the brush holder (60) is partially routed to the first wall section. 5. AC generating circuit (1) as specified in any of the claims 1 through 4, where the suction/discharge port (79) is generally facing the ground in the condition that the AC generating circuit is mounted on the vehicle. 6. An AC generating circuit (1) as specified in any of the claims 1 through 5, whereby each brush holder (60) and slip ring cover (70) shall have a cover section (72,81) to close its end at one end along the axial direction of the shaft, and the brush holder (60) shall be mounted on the slip ring cover (70) in a condition in which these cover sections are pressed against each other. 7. The AC generating circuit (1) as specified in claim 6, where the overlapping sections (74, 82) are constructed on the cover sections (72,81) and overlap each other. 8. An AC generating circuit (1) as specified in any of the claims 2 through 4, where the first wall section (75) shall have an opening made in the space connected to the suction/discharge port (79) and an outward-facing projection (100) in a radial direction shall be constructed along the edge of the opening. 9. The AC generating circuit (1), as specified in any of the claims 1 through 8, shall have a slip ring cover (70) with a side wall (77) constructed perpendicular to the direction of the shaft (33), and at least one of the protrusions (100) and grooves (102) shall be constructed on the side wall to divide the area where the slip ring cover (70) will push the brush holder (60) into the multi-section. 10. An AC generating circuit (1) as specified in any of the claims 1 through 9, whereby the brush holder (60) and slip ring cover (70) shall have a cylindrical section formed at the end of the frame and the cylindrical section shall be fitted into a small gap in a central hole made in the frame (4) to which the brush holder (60) shall be fixed in order to transmit the rotating shaft (33). 11. An AC generating circuit (1) as specified in any of the claims 1 through 10, whereby at least one extension (73) is made on the end of the slip ring cover (70) in an axial direction to extend in a radial direction and is inserted into a radial groove (80) made on the brush holder (60). 12. The AC generating circuit (1) as specified in claim 11, where the slip ring cover (70) shall have ribbed protrusions which are made on the surface on which the slip ring cover will press against the brush holder and will be pressed against the brush holder.