US 4,730,515 A · Drive apparatus for engine auxiliary equipment

Abstract

A drive apparatus for engine auxiliary equipment comprises a drive pulley mounted on the crank shaft of an engine. The rotation of the axle of the drive pulley by the crank shaft is transmitted to the grooved body of the drive pulley by a planetary cone-type reduction gear. An output ring of the reduction gear can be moved along the surface of the planetary cones of the reduction gear by an hydraulic ram to change the reduction ratio. A pump driven by the rotation of the drive pulley pumps transmission oil sealed within the housing of the pulley to drive the hydraulic ram. The oil pressure applied to the ram is determined by the opening and closing of a solenoid valve, which is controlled by a controller in accordance with the operating conditions of the engine and the auxiliary equipment driven by the drive pulley. The reduction gear, the pump, the hydraulic ram, and the solenoid valve are housed within the drive pulley which is the same size as a conventional drive pulley.

Claims7

Dependent claims

A drive apparatus for driving auxiliary equipment of a prime mover comprising:

a rotating input member driven by said prime mover;
a hollow, rotating output member surrounding and supported by said input member for rotating with respect to said input member;
an adjustable, planetary cone-type reduction gear housed within said hollow output member and having a rotating input portion connected for rotation by said input member and having a rotating output portion connected so as to rotate said hollow output member;
adjusting means for adjusting the reduction ratio of said reduction gear, said adjusting means being housed within said hollow output member;
and
control means for controlling said adjusting means in response to the operating state of said auxiliary equipment driven by said output member.

3 more elements

A drive apparatus for driving auxiliary equipment of a prime mover comprising:

a rotating input member driven by said prime mover;
a hollow, rotating output member surrounding and supported by said input member for rotating with respect to said input member;
an adjustable, planetary cone-type reduction gear housed within said hollow output member and having a rotating input portion connected for rotation by said input member and having a rotating output portion connected so as to rotate said hollow output member;
said reduction gear including a plurality of cones, each having a stem, a bottom surface, and a top surface, a rotating support member surrounding and supported by said input member and rotatably supporting each of said cones about its axis, and a stationary guide member in rolling contact with said stem, said input portion being in rolling contact with said bottom surface of each of said cones and said output portion being in rolling contact with said top surface of each of said cones, said output portion being slidably connected to said hollow output member so as to be moved in an axial direction of said input member while maintaining rolling contact with the top surface of each of said cones;
adjusting means for adjusting the reduction ratio of said reduction gear housed within said hollow ouput member;
said adjusting means comprising an hydraulic pump, an hydraulic ram having one end in fluid communication with said hydraulic pump and the other end contacting said output portion to allow hydraulic pressure generated by said hydraulic pump to provide a driving force pushing said hydraulic ram against said output portion in said axial direction of said input member, a spring disposed inside said pump for applying a compression force on said output portion in a direction opposite to said axial direction of said driving force applied by said hydraulic ram, and valve means for controlling the hydraulic pressure applied to said hydraulic ram by said hydraulic pump;
and
control means for controlling said adjusting means in response to the operating state of said auxiliary equipment driven by said output member.

5 more elements

Dependencies are inferred from the claim text.

Drive apparatus for engine auxiliary equipment

Life of this patent

Drive apparatus for engine auxiliary equipment

Life of this patent

Abstract

Claims7