A drive system with full surface drive contact. The drive system tends to maximize the surface contact pattern or area at typical bit-recess reaction (drive) torque values, thereby tending to minimize bit-recess surface contact stresses, coating damage, recess ream and premature bit fatigue failure.

A gear shifting device, a transmission, and an all-terrain vehicle are disclosed. The gear shifting device includes: a drive motor having an output shaft fixed with a driving toothed wheel; a transmission drum having a first end fixed with a driven toothed wheel and a second end provided with a gear contactor; a gear sensor having a working surface in contact with the gear contactor; and an electronic control unit electrically coupled to the drive motor. The electronic control unit outputs a drive signal to the drive motor based on a gear shifting instruction, the drive motor rotates based on the drive signal, and the output shaft drives the driving toothed wheel to rotate; the transmission drum and the driven toothed wheel rotate along with rotation of the driving toothed wheel; and the gear contactor rotates to contact one of four contacts corresponding to the gear shifting instruction.

Apparatus and method for an improved driveline coupler having a reversible saddle thereon which allows it to be configured to work with different sizes and shapes of shafts. The reversible saddle is configured on one side to work with one size of driveline shaft and configured on the opposite side to work with a different size driveline shaft so that, in the field, an operator can modify the driveline coupler from use with a first size of drive shaft to a second size of drive shaft easily and quickly by turning the saddle upside down.

Unlaminated bearings (or Torque Transfer Elements, or TTEs) are disposed to slide and displace within pockets (or “housing cavity receptacles”) provided in the internal periphery of a housing in which an articulating shaft is received. As the shaft “tilts” about its untilted axial centerline during misaligned rotation, convex curved bearing surfaces on shaft pins slidably rotate against corresponding concave curved bearings surfaces on the T as received in the housing cavity receptacles. Further, substantially flat surfaces on the TTEs are disposed to slidably displace against corresponding bearing surfaces on the housing cavity receptacles as the shaft tilts and the convex curved bearing surfaces on the shaft pins slidably rotate against the concave curved bearing surfaces on the TTEs. The sliding displacement of TTEs with respect to the housing cavity receptacles during articulated rotation is in a direction generally parallel to the shaft's untilted axial centerline.

A work apparatus includes a housing, an electric motor arranged in the housing, the electric motor including a rotor shaft driven rotationally about a rotor axis, an output shaft for driving a tool, the output shaft being connected with a form fit to the rotor shaft on a receptacle of the rotor shaft, and a flange supported on the housing. The rotor shaft is mounted rotatably via a rotor shaft bearing arranged in the flange, the rotor shaft bearing extending along a bearing section in the direction of the rotor axis, and wherein the output shaft extends at least as far as the bearing section of the rotor shaft bearing.

A method of coupling a fan to an engine includes selecting a base portion of a fan adapter, which includes a mounting portion and a coupling portion with a mating portion. The mounting portion is configured to be coupled to a fan drive or a fan drive pulley of the engine via one or more mounting elements. The method also includes selecting a fan end portion of the fan adapter. The fan end portion includes a mounting portion and a coupling portion. The mounting portion of the fan end portion is configured to be coupled to the fan, and the coupling portion of the fan end portion includes a mating portion that is complementary to the mating portion of the base portion. The method further includes coupling the engine to the fan by coupling the mating portion of the fan end portion to the mating portion of the base portion.

The invention relates to a method (100) for congruent alignment of a first polygonal multi-edge geometry (2) of a rotor shaft (3) of a dynamic mixer (4) with a second polygonal multi-edge geometry (5) of a drive shaft (6) of a motor (7) of a mixing apparatus (8), and optionally insertion of the second polygonal multi-edge geometry (5) of the drive shaft (6) of the motor (7) of the mixing apparatus (8) into or onto the first polygonal multi-edge geometry (2) of the rotor shaft (3) of the dynamic mixer (4), as well as a dynamic mixer for use in the method as also use of the mixer in the method.

A molten metal rotor receives and retains an end of a molten metal rotor shaft. The rotor shaft has one or more projections at the end received in the rotor. The rotor has an inner cavity, a top surface with an opening leading to the inner cavity, and at least one abutment. The opening includes one or more portions for allowing each projection to pass through the opening and into the inner cavity. The rotor and/or shaft are then rotated so at least one of the outwardly-extending projections is under the top surface of the rotor and is against an abutment. A molten metal pump, rotary degasser scrap melter or other device used in molten metal may utilize a rotor/shaft combination as disclosed herein.

Retainer rings for locking in an N-sided shaft to restrict axial movement of components sandwiched between them. The retainer rings have inner edges bounding a central bore. The inner edges are defined by a series of N arcs whose distance from the bore's center decreases gradually along the inner edge from a first end to a second end of each arc. The rings are slid on to the shaft with the corners of the shaft aligned with the first ends of the arcs. Then the rings are rotated on the shafts toward the second ends of the arcs until the corners of the shafts jam against the inner edges. A special spanner wrench can be used to tighten and loosen the rings on the shaft.

A split sprocket for use in a modular conveyor belt is disclosed. The split sprocket includes first and second portions that may be selectively arranged in a first configuration in which the sprocket maintains a fixed axial position on the shaft and a second configuration in which the sprocket can axially float along the shaft.