A speed reducer, a power system, a straddle-type rail train, and a rail transport system are disclosed. The speed reducer includes: a box body; a speed-reducing mechanism, disposed in the box body; and a support shaft, a first end of the support shaft being supported on the box body, and a second end of the support shaft being connected to a high-speed end of the speed-reducing mechanism. The speed reducer according to the present disclosure achieves a more stable connection between a drive shaft and a speed-reducing mechanism and a more stable power transmission.

The present invention relates generally to the cooling and/or heating of drive and/or transmission units of construction machines and similar equipment. The invention relates to the temperature control device for cooling and/or heating such a drive and/or transmission unit with at least one heat exchanger module having a liquid jacket through which flow is possible. The invention also relates to a drive and/or transmission unit having at least two transmission and/or drive sections, which are cooled and/or heated by such a temperature control unit. The invention further relates to a tunnel boring machine, the transmission of which is cooled and/or heated by such a temperature control device. According to the invention, the at least one heat exchanger module of the temperature control device forms a ring body for fitting in a sandwich-like manner between two transmission and/or drive sections, said ring body having a central through-cutout for a drive element to pass through and has, on each opposite end face, a connection flange for precision-fit end-face connection to the two transmission and/or drive sections. A driveshaft, for example, or a driving wheel or another driving element which connects, for example, two transmission stages or two transmission sections and/or drive sections in a force-transmitting or torque-transmitting manner can be guided through said through-cutout.

A support and connection device is for an operating group of a vehicle. The support and connection device is configured for supporting and for fluidic connection with an operating device in turn included in the operating group. The support and connection device identifies a vertical axis and two longitudinal axes and includes at least one plate-shaped unit in which, in the vertical direction, there is at least one mouth for the passage of a working fluid. The plate-shaped unit includes an upper laminar element, a lower laminar element reciprocally stacked along the vertical axis and a hollow space between them. The at least one mouth for fluid passage is defined laterally by a fluid mouth wall constituted by the reciprocal engagement of an upper mouth rim included in the upper laminar element and by a lower mouth rim included in the lower laminar element.

A drive device that rotates an axle of a vehicle includes a motor, a decelerator connected to the motor, a differential connected to the motor via the decelerator, a housing that accommodates the motor, the decelerator, and the differential, an oil pump to send, to the motor, oil accommodated in the housing, and a controller to control the motor. The controller drives the oil pump after the ignition switch of the vehicle is turned off.

A cooling device for a vehicle is provided, which includes a first coolant channel through which a first coolant for cooling an engine flows, a second coolant channel through which a second coolant for cooling a motor drive flows, and an oil channel through which oil for lubricating inside a transmission flows. The oil channel includes a first heat exchanger configured to exchange heat between the first coolant and the oil, a second heat exchanger configured to exchange heat between the second coolant and the oil, and a valve configured to adjust a first flow rate of the oil circulating through the first heat exchanger and a second flow rate of the oil circulating through the second heat exchanger.

A drive device includes a motor, a decelerator connected to the motor, a differential connected to the motor via the decelerator, a housing that accommodates the motor, the decelerator, and the differential, an oil pump that includes a motor assembly and a pump assembly that is rotated by the motor assembly, and sends, to the motor, oil accommodated in the housing, a rotation sensor to detect rotation of the pump assembly, and a controller to control the motor. The controller limits an output of the motor based on a detection result of the rotation sensor.

A thermal management for a hybrid vehicle is provided. The system includes an engine coolant to cabin air heat exchanger in a first heat exchange loop and being operably coupled to an engine coolant circuit and cabin air in the vehicle, respectively, a transmission fluid to engine coolant heat exchanger in a second heat exchange loop and being operably coupled to a transmission fluid circuit and the engine coolant circuit, respectively, a control valve operable to control a flow of engine coolant through at least the second heat exchange loop, and a control module configured to selectively operate the control valve to initiate or restrict the flow through the second heat exchange loop to provide heat to the transmission fluid circuit based on ambient temperature, transmission fluid temperature and engine coolant temperature. The control module is further configured to enable control functions associated with transmission operation and hybrid functions based on the transmission fluid temperature.

A drivetrain system includes a housing configured to at least partially contain a liquid lubricant such as oil that flows through a gearset. Within the housing is arranged a plurality of bearings configured to constrain respective trajectories of respective shafts. An inner surface of the housing includes a first region surrounding a motor gear bearing that is actively cooled by a coolant. The inner surface also includes a second region that is distal to the motor gear bearing and that is not actively cooled by the coolant. Cooling pins are arranged in the first region and are configured to provide heat transfer from the liquid lubricant to the coolant. The gear set can include more than one shaft, with at least one gear configured to splash oil onto the cooling pins to transfer heat from the liquid lubricant to a coolant flowing in a motor housing adjacent the first region.

A gearbox casing is provided in which a bottom part or a side part of the gearbox casing has a number of first coolant tanks. The gearbox casing above a bottom part of the first coolant tanks is provided therein with a lubricating liquid, and the first coolant tanks are used to cool the lubricating liquid. A first coolant tank is provided therein with a number of parallel partition walls, by which the first coolant tank is separated into at least two communicated sub-tanks that are provided with first fixed guide ribs and first suspended guide ribs to divide the coolant.

A liquid cooling heat dissipation structure and a gearbox casing that includes heat dissipation structure are disclosed. The heat dissipation structure includes a coolant tank and a cover plate that is used to seal the coolant tank. Two ends of the coolant tank are respectively provided with a liquid inlet and a liquid outlet. The coolant tank is provided therein with a plurality of fixed guide ribs that are arranged alternately and at intervals to form a continuous S-shaped or maze shaped channel for the coolant to flow through. The suspended guide ribs are further provided between the fixed guide ribs or between a fixed guide rib and an inner wall of the coolant tank.