Driving torque transmission control apparatus used in an automotive vehicle

A driving torque transmission control apparatus that is serially disposed between driving force transmission axles to electro-magnetically control a driving torque transmitted from one of the driving force transmission axles to the other thereof, said apparatus comprising:

• a bottomed cylindrical first rotating member provided between the driving force transmission axles and rotatable around a common axis thereto;
• a second rotating member that is relatively rotatably connected around the axis with said first rotating member in a state where said second rotating member is received in said first rotating member;
• a frictional engage section provided between an inner surface of said first rotating member and an outer surface of said second rotating member to transmit a toque from one of said first rotating member and said second rotating member to the other thereof;
• an annular electro-magnet received in said first rotating member to control a transmission torque of said frictional engage section, said electromagnet is configured to be relatively rotatable with said first rotating member and said second rotating member around the common axis, and to connected with a vehicle body through a non-rotating member in order to prevent its rotation with said first rotating member and said second rotating member;
• a cover member fitted in an opening portion of said bottomed and cylinder-shaped first rotating member outside of said electromagnet;
• a mask member secured to said electromagnet, inner surface of which is separated by a small distance with said second rotating member or an outer surface of said cover member;
• and
• a screw thread formed on the outer surface of said cover member and on a portion thereof facing with an inner surface of said mask member, said screw thread is configured to be advanced to said mask member along a rotational direction of the common axis.

A driving torque transmission control apparatus that is serially disposed between driving force transmission axles to electromagnetically control a driving torque transmitted from one of the driving force transmission axles to the other thereof, said apparatus comprising:

• a bottomed and cylinder-shaped first rotating member provided between the driving force transmission axles and rotatable around a common axis thereto;
• a second rotating member that is rotatably connected around the axis relatively said first rotating member in a state where said second rotating member is received in said second rotating member;
• frictional engage section provided between an inner surface of said first rotating member and an outer surface of said second rotating member to transmit a toque from one of said first rotating member and said second rotating member to the other thereof;
• an annular electro-magnet received in said first rotating member to control a transmission torque of said frictional engage section, said electromagnet is configured to be relatively rotatable with said first rotating member and said second rotating member around the common axis, and to connected with a vehicle body through a non-rotating member in order to prevent its rotation with said first rotating member and said second rotating member;
• a cover member fitted in an opening portion of said bottomed cylindrical first rotating member outside of said electro-magnet;
• a sealed bearing disposed between an inner surface of said cover member and an outer surface of said electromagnet to rotatably support said electromagnet relatively with said first rotating member and said second rotating member;
• and
• a seal member disposed between an inner surface of said electromagnet and an outer surface of said second rotating member.