A gear-based mechanical metamaterial with continuously adjustable elastic parameters in a large range is provided. The gear-based mechanical metamaterial includes a gear array, a frame and connecting shafts. The gear array is formed by periodically extending mechanical metamaterial cells along an x direction and a y direction. Each of the mechanical metamaterial cells is formed by arranging a multiple gears. Adjacent gears of the multiple gears are meshed with each other. Each of the multiple gears includes a center hole and two centrosymmetric irregularly-shaped holes. A thickness of an elastic arm between the each of two centrosymmetric irregularly-shaped holes and an outer wall of a corresponding one of the multiple gears is uniformly increased or decreased. Each of the connecting shafts is arranged in a center hole of a corresponding one of the multiple gears.

The brake assembly includes a housing, a rotor disc. The rotor disc includes at least one internal cavity. The at least one internal cavity includes a pawl and a thermal fuse. In use, the thermal fuse is configured to maintain the position of the pawl in the at least one internal cavity when a temperature is below a predetermined threshold, and wherein the thermal fuse is configured to melt when a predetermined threshold of temperature is reached during braking to release the pawl out of the at least one internal cavity towards the housing. The housing includes at least one recess configured to receive the pawl.

A landing leg assembly for a heavy duty commercial vehicle includes a first leg member defining an interior space, a second leg member telescopingly engaging the first leg member and movable between a retracted position and an extended position with respect to the first leg member, a gear assembly at least partially located within the interior space of the first leg member and operably coupled to the second leg member and configured to receive an input from a user to move the first leg member between the retracted and extended positions, the gear assembly including a shaft member and a gear member fixed for rotation with the shaft member, and an integral, single-piece bearing member including a bore that rotatably receives the shaft member, wherein the bearing member comprises a powdered metal and is directly welded to the first leg member.

An embodiment power train for a vehicle includes a first input shaft configured to receive rotating forces from a first motor and an engine, a second input shaft configured to receive a rotating force from a second motor, an output shaft disposed in parallel with the first input shaft and the second input shaft, a transmission gear set in which a plurality of gear sets having different gear ratios are engaged with and coupled to the first input shaft and the output shaft, a shifting unit configured to select a gear set of the plurality of gear sets based on a traveling speed of the vehicle, and a motor-side transfer gear set engaged with and coupled to the second input shaft and the output shaft.

Described herein relates to a system of and method for recovering energy and providing power in a multi-source transmission assembly, in which the transmission assembly includes secondary power sources in combination with a primary power source, where the secondary power sources are in reverse rotation with respect to the primary power source, such that energy is recovered during deceleration or the secondary power sources power the vehicle as needed. During the translation of a vehicle employing the transmission assembly, at least one motor may function, as needed, to propel the vehicle forward. During times in which the vehicle may not positively accelerating, at least one of the motors may switch to a generator mode to generate energy to be stored in a vehicle battery. As such, at least one of the motor power sources may recover an amount of energy expended by the vehicle during acceleration.

A modular pinion shaft that includes a tubular member having a first end and a second end, a first pinion gear member secured to the first end by a plurality of fasteners, and a second pinion gear member secured to the first end by a plurality of fasteners. Gear teeth of each of the pinion gear members are aligned by one or more indexing members disposed between the tubular member and each pinion gear member.

A traction transmission for purposes of transmitting the rotation of an input drive shaft to a rail wheel which is connected in a rotationally fixed manner to an output drive shaft, has at least two transmission stages, in each case having at least one small gear or pinion, and at least one large gear, and has a transmission housing with bearings for the input drive shaft and the output drive shaft, and has transmission oil arranged in the transmission housing, wherein in the position of use the input drive shaft is arranged below the output drive shaft. The transmission housing has an attachment element for purposes of a pivotable arrangement about an axis parallel to the axis of rotation of the input drive shaft and output drive shaft.

A wheel head transmission (1) comprising a first and second shafts (W1, W2) which are connected to one another via a planetary transmission (PG). The wheel head transmission (1) comprises first and second planetary stages (P1, P2), which include a first element (E11, E12), a second element (E21, E22) and a third element (E31, E32). The first element (E11) of the first planetary stage (P1) is connected to the first shaft (W1) for conjoint rotation, the second element (E21) of the first planetary stage (P1) and the third element (E32) of the second planetary stage (P2) are connected to one another and the second shaft (W2) for conjoint rotation. The third element (E31) of the first planetary stage (P1) and the first element (E12) of the second planetary stage (P2) are connected together for conjoint rotation, and the second element (E22) of the second planet stage (P2) is immobilized.

A partition wall that partitions an inside of a case into a gear chamber in which a reduction gear pair is accommodated and a motor chamber in which an electric motor is accommodated, a bearing provided at a bearing support portion of the partition wall so as to overlap with a side portion of a large-diameter gear of the reduction gear pair in a direction of an axis and supporting a counter shaft, an oil passage provided in the gear chamber and guiding lubricating oil, scooped up by the large-diameter gear to a catch tank, and a communication hole provided in the partition wall and providing communication between the oil passage and the motor chamber, are provided. Lubricating oil introduced into the motor chamber via the communication hole is supplied to the bearing.

A traction transmission for purposes of transmitting the rotation of an input drive shaft to a rail wheel which is connected in a rotationally fixed manner to an output drive shaft, has at least two transmission stages, in each case having at least one small gear or pinion, and at least one large gear, and has a transmission housing with bearings for the input drive shaft and the output drive shaft, and has transmission oil arranged in the transmission housing, wherein in the position of use the input drive shaft is arranged below the output drive shaft. The transmission housing has an attachment element for purposes of a pivotable arrangement about an axis parallel to the axis of rotation of the input drive shaft and output drive shaft.