Abstract:
An improved rack and pinion has been developed that eliminates backlash without using split gears. It is amenable to easy retrofitting of existing systems.
Abstract:
A method of obtaining a desired tooth flank backlash for a transmission having at least two interlocking toothed gears, comprises applying a removable coating on at least one of the toothed gears for purposes of setting the backlash, the coating comprising a mixture containing a bonding agent and a filling material; adjusting the least two interlocking toothed gears with the coating relatively to each another essentially play-free or with only small play; and removing the coating.
Abstract:
An speed reducer assembly is provided along with a method and apparatus for adjusting the speed reducer assembly to achieve zero backlash. The speed reducer assembly includes a split worm with a fixed worm segment and a floating worm segment which mesh with the teeth of the gear. The position of the worm relative to the gear can be precisely and accurately adjusted without disassembly of the speed reducer or removal of the speed reducer assembly from the housing. Elimination of a constant spring force on the floating worm segment of the split worm also provides for the elimination of drag which results in a speed reducer assembly with increased efficiency. The elimination of drag also reduces the wear on the elements of the speed reducer assembly.
Abstract:
A motor-driven type power steering apparatus includes: a drive gear connected to an output shaft of a motor; a driven gear in mesh with the drive gear, which is connected to a steering unit; a bearing for supporting one end of the drive gear; a support portion in which the bearing is disposed; and a curved leaf spring which has a length larger than a peripheral length of the bearing and fitted between the bearing and the support portion in a resiliently deformed state. The curved leaf spring urges the bearing so that a distance between an axis of the driven gear and an axis of the drive gear decreases.
Abstract:
The gear mechanism for minimizing backlash may include a convoluted spring positioned between an external spline of a gear or shaft and an internal spline of a gear. The gear mechanism may include a cam and cam follower arrangement upon two adjacent gears positioned on the same shaft. Two stacked gears may include a U-shaped backlash eliminating element passing through both gears. The gear mechanism may include rollers which may be conically shaped.
Abstract:
A split sprocket assembly, related apparatus, and a method of mounting a sprocket to a rotatable structure, such as a drive or idler drum, are disclosed. In one embodiment, the sprocket assembly is comprised of at least three sections or segments, each of which is secured to the adjacent section or segment by a fastener, such as a tangentially-extending bolt and nut combination. The sprocket assembly includes a plurality of receivers, each for receiving a key that corresponds to a keyway formed in the rotatable structure. In one embodiment, at least one of the keyways is truncated and, thus, extends only partially across the rotatable structure in the axial direction. A key substantially identical to the truncated keyway in length and width is placed therein, such that the sprocket is prevented from traveling or nullwalkingnull along the rotatable structure.
Abstract:
A gear mechanism includes a driving gear, a driven gear, and an idler gear which is in mesh with the driving gear and the driven gear, wherein rotation of the driving gear is transferred to the driven gear via the idler gear. The idler gear includes first and second spur gears which are positioned adjacent to each other in an axial direction and are generally centered about a common axis, radial teeth of the first and second spur gears each being the same in shape, pitch and the number of teeth, and the first and second spur gears being biased to rotate in opposite directions. The first and second spur gears are connected so as to be relatively movable in a radial direction normal to the axial direction while maintaining the first and second spur gears in mesh with the driving gear and the driven gear.
Abstract:
A positioning device without backlash includes a table and at least one gear operatively associated with the table. At least one worm gear is connected to the gear and the gear is driven in a desired direction with a primary motor and a synchronized slave motor. The synchronized slave motor is then reversible to remove the backlash in the positioning device thereby permitting an actual position to correspond with a dialed-in position.
Abstract:
A gear adapted to provide load sharing in a torque split transmission module wherein at least one spring element is disposed in combination with a torque driving shaft at one end thereof and in combination with a ring of torque transmitting gear teeth at the other end thereof. The spring element is radially stiff to center the ring of gear teeth about the shaft and is torsionally soft to permit relative rotational displacement between the gear teeth and the shaft. The spring element is substantially disc shaped and includes a plurality of recurved radial spokes. More specifically, the spokes project radially outboard from a first mounting ring, define a 180 degree bend proximal to the gear teeth, and extend inwardly toward a second mounting ring. A pair of spring elements may be used wherein the first mounting ring of each spring element connects to shaft flange and the second mounting ring mounts to an inboard end of a radial flange of the gear teeth. Furthermore, each of the pair of spring elements is disposed on either side of the radial flange to balance the spring force about a medial plane defined by the ring of gear teeth. A manufacturing method for fabricating the spring element is also disclosed.
Abstract:
A gear set comprising a pair of phased split gears, a driven gear (1) and a driving gear (2). The sections ((3)(4) and (5)(6)) of each of the split gears are offset from each other, preferably by one-half pitch, and in one of the two split gears, the sections of the gear may rotate relative to each other. The two sections of that gear must then be connected by a means that allows the transmission of torque between the two, preferably by being resiliently loaded by a torsion spring (33) or other bias medium to the leading edge of the meshing tooth of the mating gear. When the driving split gear is turned, force is initially applied to the driven gear through the resilient bias medium. This allows perfect mesh between the two gears in the drive while taking manufacturing variability into consideration.