234 results about "Locking differential" patented technology

A dual ball ramp actuator having a control ring acting with a pressure plates to supply an axial clutch clamping force to a differential clutch assembly where the ball ramp paths follow overlapping eccentric grooves that can be actuated in both the forward and reverse directions. The dual ramp feature doubles the effectiveness and sensitivity when compared to a single ramp system. The overlapping eccentric ball ramps increase (effectively double) the angular travel distance while reducing the ramp angle (in half). The forward and reverse feature provides clutch actuation in both the forward and reverse directions. The dual ramp, 3-piece sandwich construction permits the central control ring to roll up on two sets of balls on each side. This structure doubles the axial travel available to compress a disc pack and lock up the differential with the same ball ramp angle when compared to a single ramp system involving only two ramp plates.

A limited slip differential includes a friction clutch mechanism, an electromagnetic coupling, and a camming mechanism disposed between the friction clutch mechanism and the electromagnetic coupling. The camming mechanism converts shearing forces within the electromagnetic coupling to an axial force applied to engage the clutch mechanism. The camming mechanism includes annular discs having axially inclined ramps, and a roller bearing for movement along the ramps to provide for variable spacing between the annular discs, wherein increased spacing is used to apply the axial force.

A locking differential including a differential carrier or housing 1 closed by a flange cap 2 engaging locking gear 2A, the housing 1 and flange cap 2 supporting side gears 10 and 11 which mesh with pinion gears 12 supported by cross shafts 8 and 9, the cross shafts engaging mounting holes in the housing 1, each pinion gear having an even number of teeth, and each side gear having a number of teeth which is a multiple of two where two pinions are at 180° to each other, three where three pinion gears are at 120° to each other, four where three or four pinion gears are at 90° to each other, or five where five pinions are at 72° to each other, the locking means further including a clutch gear 5 which slidably engages the locking gear 2A and the teeth on side gear 10 in the locked position, the cross shafts 8 and 9 being in a fixed relationship to the locking gear 2A.

A differential mechanism includes a case, a gear rotatable about an axis, a lock ring held against rotation relative to the case, a lever contacting the lock ring, and an electromagnetic coil that is displaced axially when energized, pivoting the lever, engaging the lock ring with the side gear, and preventing the gear from rotating relative to the case.

A gearbox assembly includes a housing which contains a differential gear set and a two-speed reduction gear set. A spider drives differential pinion gears nested between outer pinion gears. A first and a second clutch that can be engaged “on the fly” achieve the two-speed functionally of the gearbox assembly. Another gearbox assembly includes an on-demand locking differential with a differential clutch located between differential axle side gears to selectively lock the differential axle side gears together and thereby lock the axle shafts.

A locking differential includes a pair of annular clutch members that are normally displaced apart to effect engagement between clutch teeth on the remote ends of the clutch members and corresponding gear teeth on the adjacent ends of a pair of side gears between which the clutch members are colinearly arranged. When one output shaft overruns the other by a predetermined amount, the clutch member associated with the overrunning output shaft is disengaged from its associated side gear. A retaining device retains the clutch members in the disengaged condition until the overrunning condition is terminated. In one embodiment, the retaining device is a cam arm and follower pin arrangement that is connected between the clutch members and operates in conjunction with a pair of friction rings. In a second embodiment, the retaining device comprises a pair of holdout rings that operate between the clutch members and the side gears.

The invention discloses a morphological gradient-based identification method for the magnetizing inrush current of a transformer. The identification method comprises the following steps of: (1) acquiring a differential current signal I of current transformers arranged at two differential protection sides of the transformer; (2) sampling the differential current signal I; and (3) when the obtained differential current signal I exceeds a setting valve Icd of a differential-protection starting component, distinguishing the magnetizing inrush current. The step (3) specifically comprises the following steps of: (3-1) taking the differential current signal I of which a data window is a half of the length of a base frequency period to obtain a morphological gradient result of the I according to an improved mathematical morphology gradient algorithm; (3-2) introducing criterion sigma: determining that I is the magnetizing inrush current if sigma is greater than sigma set, and carrying out a step (3-3) otherwise; and (3-3) introducing criterion C: determining that I is the magnetizing inrush current if C is greater than C set, and determining that I is an inner fault signal otherwise. The method provided by the invention has the advantages of simple steps, small calculated quantity, short time delay, high reliability and the like, so that the magnetizing inrush current can be identified to realize the locking differential protection.

A clutch assembly for a locking differential includes driving clutch members engaged with driven clutch members in a preloaded configuration to provide a minimum amount of preload there between during low torque conditions. The driving clutch members are biased relative to each other with shear pin/spring assemblies located within bores of the driving clutch members. During assembly of the clutch assembly, the shear pin/spring assemblies may be positively locked down within the bores with a removable tool. In one embodiment, the removable tool is inserted into a small opening extending through the driving clutch member and the tool engages an annular groove on a shear pin of the shear pin/spring assembly. Further, the clutch assembly may include driving clutch members having drainage openings that may help prevent hydraulic lock during operation of the locking differential.

A locking differential assembly for use in a toy model vehicle. This is accomplished by mounting a locking clutch assembly on an output shaft of a differential gear carrier having an external face. The locking clutch assembly includes a slider member that may be configured to move along the output shaft to engage the external face to disable a differential action of the differential gear carrier.

The invention is a method of identifying and protecting differential protective difference current and differential protective transient TA abnormal state of a transformer. The differential abnormal alarming adopts ratio brake principle, the difference current abnormal alarming threshold value varies with the variation of load current of the transformer, when a phase difference current meets a condition, send out an abnormal alarming signal in no need of locking differential protection, the differential current initial value should be adjusted by avoiding the exciting current of the transformer, generally 0.03Ie, where Ie is rate current of the transformer, combine industrial frequency variation quantity voltage opening component and the current quantity, the distinguishing principle of differential protective loop transient TA breakage and short-circuit is allowable type, when differential protection starts and then meets conditions, consider it is a failure condition to open differential protection, and otherwise consider it is a start of differential protection caused by differential loop TA abnormality.

The invention relates to a transformer differential protection method and device based on a current transformer disconnection. The transformer differential protection method comprises the steps of judging whether a current transformer disconnects; if the current transformer disconnects, judging whether differential protection is started; if the differential protection is started, instantaneously determining that the current transformer disconnects, or otherwise, delaying to determine that the current transformer disconnects; after determining that the current transformer disconnects, judging whether disconnection locking differential protection is used; if the disconnection locking differential protection is not used, alarming the current transformer disconnection and opening the differential protection, and if the disconnection locking differential protection is used, judging whether a differential current is greater than a set value; if the differential current is greater than the set value, alarming the current transformer disconnection and opening the differential protection; and if the differential current is not greater than the set value, alarming and locking the differential protection. The transformer differential protection method and device related by the invention can reliably detect whether the current transformer disconnects; and the problems that the differential protection is likely to be mistakenly operated after the current transformer disconnects, and the differential protection refuses operation when a failure reoccurs are effectively solved.

The invention relates to a differential protection method for an extra-high voltage transformer, and belongs to the technical field of power system relay protection. The differential protection method includes: firstly locking differential protection that has not been started, then judging harmonic content of a difference stream which has been started the differential protection, and if harmonic contents of three-phase difference streams are all low, directly opening three-phase differential protection; otherwise, judging that current amplitude of each phase of a common winding is more than a no-flow threshold, judging symmetry of the current more than the no-flow threshold, and only opening differential protection of the phase which meets the requirement of symmetry. No-load and no-load faults of the transformer are identified through comparing symmetry of current waveforms of the common winding of the extra-high voltage transformer, so that the differential protection does not operates mistakenly when in a normal no-load test and acts quickly when a faulty transformer is in the no-load test, and reliability of a protection device is improved.

A differential assembly includes a case, a pair of pinion gears, a pair of side gears and an electrically operable coupling including an electromagnet. The coupling selectively drivingly interconnects one of the side gears and the case. The electromagnet of the coupling is axially moveable within the case to selectively place the differential assembly in an open or a locked condition.

The present invention relates to a transmission for a recreation vehicle, such as an all-terrain vehicle that includes a locking assembly for locking a differential joint in the front- or rear-end portion of the transmission. A vehicle having both front and rear differentials may include separate locking assemblies for each differential to lock and unlock the differentials for various combinations of power allocation to wheels of the vehicle. A differential joint according to the invention may include a ring gear and spider gears that drive a universal joint coupled to wheels of the vehicle. A coupler of the locking assembly includes an inner surface configured to engage outer surfaces of the ring gear and the universal joint, and an outer surface configured to be engaged by an actuator. The actuator adjusts the coupler between a locked position wherein the ring gear and the universal joint are locked together, and an unlocked position wherein the universal joint is free to rotate relative to each other. The coupler preferably has a relatively thin width so as to minimize a track width of the vehicle.

The present invention relates to a basic jaw type self-locking differential, which has the characteristics of no collision, high reliability, and long service life. The present invention is characterized in that a force transmission tooth and separating teeth and an accessory blocking tooth which are positioned on driven rings are connected as a whole; a self-limiting type blocking embedding mechanism is embedded by two embedding mechanisms of a force transmission embedding mechanism and a separation embedding mechanism under the differential condition, and axially positioned in the two mechanisms and radially positioned in the two mechanisms, between the two mechanisms or outside the two mechanisms, a lift angle of both sides blocking the working surface is formed to enough ensure the friction self-locking collided on the both sides and the stability of the blocking operating condition, in order that the lift angle has the capabilities that the adaptive axle base changes and the abrasion is automatically compensated, and the slipping mode of no collision is unvaryingly maintained between the separating teeth in the operating condition, two processes of the self-separating block process and the embedding return process are absolutely reliable, and has no relation to the stability of the spring parameter compacted by the driven rings, hence the problem that the driven rings on the both sides are synchronously separated is not a problem any longer. The processing of the differential is obviously improved, the difficulty of the assembly is largely reduced, and the performance, the service life, and the interchangeability, etc. are remarkably improved.