787 results about "Transfer case" patented technology

The invention provides a row spacing adjustable intertillage fertilization banking machine, and relates to the technical field of farming machinery. The intertillage and fertilization banking machine with the adjustable row spacing comprises a rack, two movable frames are arranged on the two sides in the rack in a sliding mode, a double-shaft motor is fixedly arranged at the front end in the rack, screw rods are fixedly arranged at the output ends of the double-shaft motor, a transfer case is fixedly arranged on the side, away from the double-shaft motor, in the rack, and the transfer case is fixedly arranged on the side, away from the double-shaft motor, of the rack. Main rotating shafts are fixedly arranged at the output ends of the two transfer cases correspondingly, and auxiliary rotating shafts are slidably arranged outside the two main rotating shafts correspondingly. Through the replacement mechanism of the intertillage fertilization banking machine, a user is allowed to integrally and independently replace the cultivation cutter on the fixed disc, the operation process is convenient and efficient, in addition, the screw is driven by the double-shaft motor, the line spacing can be easily adjusted, operation is easy and convenient, the adjustment range is wide, the adaptability and flexibility of the intertillage fertilization banking machine are enhanced, and the application range is wide. The requirements of different crop row spacing can be met.

A transfer case includes a mainshaft, an oil distribution device, and a lubricating pump, with the lubricating pump having a pumpshaft offset from the axis of the mainshaft. The transfer case includes a rear housing in which the lubricating pump housing is disposed in radially offset location, where lubricating oil is drawn via suction to the pump housing from a sump at the bottom of the transfer case. The pump pressurizes the oil and delivers the oil via passageways extending between the radially offset pump and the oil distribution device, which surrounds the mainshaft. The passageways may be provided in a manifold block that is fixed to the housing. The manifold block may provide an anti-rotation feature to the oil distribution device, such that drag on the oil distribution device caused by rotation of the mainshaft is counteracted.

The invention relates to the technical field of control strategy simulation test, in particular to a test method and device for a transfer case control strategy, a vehicle and a storage medium. Inputting the running data of the vehicle, the motor signal of the transfer case and the driving operation information of the user into a pre-constructed transfer case control strategy simulation test platform, and analyzing the running data, the motor signal and the driving operation information by using the transfer case control strategy simulation test platform; and obtaining a test result of a pre-constructed transfer case control strategy simulation test platform according to the analysis result. Therefore, the problems of long test period, high cost, difficulty in comprehensively covering all possible driving road conditions and extreme conditions and the like caused by real vehicle test are solved, various operation parameters in a whole vehicle environment are simulated through the transfer case control strategy simulation test platform, control signals and results in the operation process are observed, and the control strategy is tested and verified.

The invention discloses a transfer case vibration simulation analysis optimization method and device, and the method comprises the steps: building a transfer case finite element model, simulating each bearing of a transfer case shaft gear, and obtaining a bearing dynamic load; acquiring the inherent frequency and the inherent vibration mode of the first ten orders of the transfer case shell, inputting variable parameters into the finite element model of the shell, and performing simulation solution analysis on the frequency response of the box body through a modal superposition method; establishing parameter sample data points and level numbers on the basis of variable parameters, generating an orthogonal test table, and respectively performing an independent simulation test on each parameter group to obtain an average torque and a vibration acceleration level corresponding to each parameter group; the variable parameters serve as target parameters, a neural network prediction model is established to optimize the multi-target parameters, and an optimal solution set with the maximum average torque and the minimum vibration acceleration level is obtained through iterative operation; optimization is carried out through simulation analysis so as to reduce or avoid vibration, data support is provided for rack construction of a transfer case high-speed verification test, test problems are reduced, and test working efficiency is improved.

The invention discloses a hybrid airport fire fighting truck chassis operation control system, which comprises a chassis frame, a water pump, a power battery and a vehicle control unit, and further comprises a diesel engine mounted on the chassis frame; the power takeoff is connected with the diesel engine; the AT gearbox is also connected with the diesel engine; the AT gearbox is connected with the input end of the power transfer case through a transmission shaft; and the driving motor is connected with the input end of the power transfer case through a speed reducer. The problems that a traditional chassis is single in power source, vehicle in-out garage emission waste gas treatment and driving power take-off are solved, the problem that a vehicle cannot run when an engine breaks down or a motor breaks down is solved, and the problems that the whole vehicle is insufficient in power performance and poor in economical efficiency are solved.

The disclosure relates to a driving apparatus for a mobile crane comprising an internal combustion engine, an electric machine, and a transfer case for selectively distributing power outputted to the transfer case to a driving mechanism, and to a pump arrangement for performing crane operation, wherein the internal combustion engine cooperates with an input shaft of the transfer case that cooperates with the driving mechanism, the electric machine cooperates with an intermediate shaft of the transfer case, and the pump arrangement cooperates with an output shaft of the transfer case. The driving apparatus comprises a first clutch arranged between the input and intermediate shafts for coupling them to each other or decoupling them from each other as required, and a second clutch arranged between the intermediate and output shafts for coupling them to each other or decoupling them from each other as required.

The invention relates to a transfer case offline detection method and system and electronic equipment, and belongs to the technical field of electronics. The method comprises the steps of controlling the transfer case to perform a first round of static self-learning test, obtaining a first mechanical zero position and a first position of an execution motor in the transfer case during the first round of static self-learning, and obtaining a first round of static self-learning test result according to the first mechanical zero position and the first position; if the result of the first-round static self-learning test shows that the test is passed, controlling the transfer case to perform a running-in test; after the running-in test is carried out on the transfer case, the transfer case is controlled to carry out a second round of static self-learning test, and a second mechanical zero position, a second position and a first value of the execution motor during the second round of static self-learning are obtained; and obtaining a second round of static self-learning test result according to the first position, the second mechanical zero position, the second position and the first value. Potential fault problems can be found through a series of tests, so that measures are taken in advance, and the performance and quality of products are improved.

A military vehicle including a chassis, a cab mounted to the chassis and defining a rear wall, an engine mounted to the chassis, a transfer case coupled to the engine and including a driven output providing mechanical power to the military vehicle and a generator output, and an electric machine positioned rearward of the rear wall of the cab and coupled to the generator output of the transfer case and generating electrical power.

The invention discloses an airflow circulation type high-speed suction sweeping vehicle which comprises a chassis, a garbage can body, a power distribution assembly and a sweeping suction cup assembly, the garbage can body comprises a clear water tank and an airflow circulation box, and the airflow circulation box comprises a fan cabin used for containing a fan; an air outlet of the fan is communicated with the positive pressure airflow channel, an air inlet of the fan is communicated with the negative pressure airflow channel, the positive pressure airflow channel and the negative pressure airflow channel are both communicated with the cleaning suction cup assembly, the power distribution assembly comprises a power take-off transfer case, and a total power input port of the power take-off transfer case is connected with the gearbox. A plurality of power output ports of the power take-off transfer case are respectively communicated with the rear drive axle and the fan; the power take-off transfer case takes out all power of the chassis engine and distributes the power into multiple paths to be output, under the condition that the whole vehicle driving requirement is met, the airflow circulation box is driven to generate positive pressure airflow and negative pressure airflow to increase the road surface garbage suction and conveying speed, and therefore the whole vehicle power configuration is reduced, and oil consumption, noise and use cost are further reduced.

The utility model discloses a transfer case lubricating device which comprises a transfer case body, a bearing seat is installed at the output end of the transfer case body, a bearing cover is arranged on one side of the bearing seat, a filter screen ring is embedded in the bearing cover in parallel, and a cleaning brush is fixedly connected to the bottom end in a cavity of the bearing cover. The bottom end of the bearing cover is connected with an impurity removal trapezoidal cavity in a penetrating manner; through the filtering effect of the filter screen ring on lubricating oil, the situation that the service life of equipment is affected by abrasion increase caused by the fact that impurity particles enter the equipment is avoided, and self-cleaning can be carried out under the condition that the whole equipment is not disassembled through the half-edge reciprocating rotation mode of the filter screen ring and the cleaning brush in a matched mode.

A drive for a mobile material processing plant includes an internal combustion engine and an electric motor. The internal combustion engine can be selectively coupled to or uncoupled from a mechanical drive train at its drive end by an internal-combustion-engine clutch and the electric motor can be selectively coupled to or uncoupled from the mechanical drive train by an electric-motor clutch. The drive train has an output end having at least one output, wherein at least one machine unit, in particular an electric generator, is driven by the output(s). The at least one machine unit may be coupled to or uncoupled from the output by a shiftable machine-unit clutch, and the electric-motor clutch or the internal-combustion-engine clutch may be operatively connected to the machine-unit clutch via a coupling, in particular a mechanical or hydraulic coupling.

The utility model provides a transfer case, range extender assembly and engineering machinery, transfer case is applicable to the engineering machinery, the engineering machinery comprises an engine, a generator and a hydraulic pump, transfer case includes: transfer case, transfer case includes casing and is located the planetary gear subassembly in the casing, planetary gear subassembly includes planet carrier, sun gear and a plurality of planet gear, the multiple planet gears are arranged around the outer circumferential face of the sun gear at intervals, and all the planet gears are installed on the planet carrier and engaged with the sun gear. Wherein the planet carrier is connected with an output shaft of the engine, and the sun gear is in transmission connection with an input shaft of the generator, so that the problem that in the prior art, an engine of a range extender structure for engineering machinery cannot work in the optimal efficiency interval all the time is solved.

The utility model discloses a compressed air foam fire fighting truck and a compressed air foam fire fighting system in the technical field of compressed air foam, and aims to solve the problems that a transfer system of a compressed air foam fire fighting system in the prior art is high in assembly precision requirement and occupies the space in the height direction of a vehicle. The air compressor is in transmission connection with the transfer case through a first coupler and can adapt to length and angle errors, the requirement for assembly precision is lowered, and transmission of the air compressor is more stable and reliable; the air compressor and the water pump take power from a vehicle engine to realize single-vehicle operation; through power distribution of the transmission shaft and the transfer case, the occupied size is reduced, the requirement that the air compressor and the water pump are arranged in the length direction of the vehicle is met, the occupied space in the height direction of the vehicle is reduced, the device can be suitable for a large-span fire fighting truck to be provided with a full-hard-pipe and large-drift-diameter boom fire fighting pipeline, and then the on-way resistance of compressed air foam conveying is reduced.

An electric pump system and method of operating the same involves pumping a fluid through a fluid passageway defined in a mechanical pump from a pump inlet to a hollow shaft of a motor, through the hollow shaft to an internal motor cavity defined by a housing of the motor, and through another fluid passageway defined in the motor housing and mechanical pump that leads to a pump outlet. The system and method further involve pumping the fluid through another fluid passageway defined in the mechanical pump from yet another pump inlet to the pump outlet. The temperature of fluid exiting the hollow shaft can be assessed and used by an electronic control unit (ECU) of the electric pump system to control the same. The electric pump system can be part of a cooling and lubrication system for an electric vehicle transmission, gearbox, differential or transfer case, for example.

The utility model relates to the technical field of agricultural implements, in particular to an automatic speed regulation type traction type hydraulic self-power driving rake which comprises a frame used for being connected with a tractor, a rake body connected to the periphery of the frame, a main power device installed on the frame, a hydraulic transfer case connected to the main power device and an oil pump installed on the hydraulic transfer case. An oil pipe is connected to the oil pump, a proportional valve used for adjusting the flow of liquid in the oil pipe is installed on the oil pipe, and a branch power device used for being connected with the oil pipe is installed on the rake body. Power is transmitted through hydraulic pressure, flexible driving is carried out, a machine tool can be well protected if hard sundries exist, an oil pipe can be made of a soft pipe so that assembly layout can be more convenient and reasonable, the size of the driving harrow can be conveniently increased according to requirements, and the rotating speed of harrow teeth can be adjusted more flexibly through hydraulic transmission; the increase and decrease of the liquid flow can be steplessly adjusted through the proportional valve, so that the adjustable range of the rotating speed is expanded to adapt to different soil environment requirements.

The invention relates to the field of new energy engineering vehicles, and discloses an emergency steering pump module, a power-assisted steering system and a new energy engineering vehicle, the emergency steering pump module comprises a high-speed pump, a high-speed motor and a power battery, the high-speed motor is in driving connection with the high-speed pump, and the power battery is electrically connected with the high-speed motor. The emergency steering pump module can be applied to a power-assisted steering system and can replace a common steering oil pump to supply oil to a power-assisted oil cylinder under the condition that the common steering oil pump fails, the emergency steering pump module can operate independently, engine driving is not needed, and therefore the emergency steering pump module is convenient to use. The space limitation that a traditional emergency steering pump must take off power from mechanical power sources such as a transfer case power take-off port or an engine power take-off port is eliminated, the emergency steering pump module can be flexibly arranged at a proper position, and therefore arrangement of a power-assisted steering system is effectively simplified. In addition, the high-speed pump and the high-speed motor are small in size, so that the emergency steering pump module is compact in overall structure and small in occupied space.

The invention relates to a truck-mounted concrete pump (1) with a hydraulically driven concrete pumping device (2), a first hydraulic pump (3), a second hydraulic pump (4), the first and second hydraulic pumps (3, 4) being provided for the joint hydraulic drive of the concrete pumping device (2), and a first drive motor (5) provided for the mechanical drive of the first and second hydraulic pumps (3, 4), which are connected to one another in a drive-force-transmitting manner. The first and second hydraulic pumps (3, 4) are connected in a drive-force-transmitting manner via a coupling (7), which is provided for selectively interrupting the drive-force-transmitting connection between the first hydraulic pump (3) and the second hydraulic pump (4). In a first variant of the invention, the first and second hydraulic pumps (3, 4) form a hydraulic pump train (6), which connects them in a drive-force-transmitting manner.In a second variant, the first and second hydraulic pumps (3, 4) are connected to each other via a transfer case (30) to transmit drive force.

The utility model belongs to the technical field of agricultural machinery transmission systems, and particularly relates to a front drive axle assembly of a hydraulic stepless speed change harvester, which comprises a gearbox body, a first shaft, a second shaft, a third shaft, a left half shaft and a right half shaft of a differential assembly are rotatably connected in the gearbox body, and the first shaft is in transmission connection with an output end of a hydraulic stepless speed change motor. The first shaft is sleeved with a first shaft gear A, the second shaft is sleeved with a first-stage speed reduction driven gear, the second shaft and the third shaft are in transmission fit through a gear position gear assembly, the third shaft is sleeved with a third shaft gear A, a left half shaft and a right half shaft of the differential mechanism assembly are in transmission connection with the tail end transmission box assembly, and one end of the third shaft extends out of the gearbox body to form a four-wheel drive reserved end. According to the utility model, a transmission mechanism which is driven by the hydraulic stepless variable-speed motor and is provided with multi-gear speed change is adopted, so that the requirements of simple operation and stable and reliable transmission are met, and a four-wheel-drive reserved end which can be in transmission fit with a four-wheel-drive transfer case is reserved, so that the complete machine can be ensured to have enough driving force.

The invention discloses a transmission assembly, and relates to the technical field of automobile transmission. The transmission assembly comprises a front axle frame, a main speed reducer, a front axle transmission shaft, an engine, a gearbox, a transfer case, a rear axle transmission shaft, a spray pump transmission shaft, a rear axle frame and a water-jet propeller, the gearbox is connected between the engine and the transfer case, and the main speed reducer is connected between the front axle frame and the front axle transmission shaft. According to the transmission assembly, the amphibious gear shifting operation function can be achieved through the arrangement of the transfer case and the specific design of the transfer case, power sent by the engine is also sequentially transmitted into the gearbox and then transmitted into the transfer case, gears are controlled by shifting the transfer rod, the engine can transmit the power to the spray pump transmission shaft, and the transmission efficiency is improved. When the vehicle runs, the spraying pump transmission shaft transmits power to the water spraying propeller, so that the water power transmission process is completed, the power of the engine can be switched between a water mode and a land mode, and the adaptive capacity of the vehicle in different environments is improved.

A grinder for processing a food product includes a base and a drive unit supported on the base. The drive unit includes a housing, a motor housed in the housing, and a transfer case operatively connected to the motor and comprising an output. The grinder also includes a grinder head connectable with the output of the transfer case. The grinder head includes an inlet, a screw conveyor, a rotating knife, and an outlet comprising a fixed hole plate. The motor is operable to impart rotation of the screw conveyor and rotating knife so that the food product fed into the grinder head inlet is fed to the screw conveyor, which forces the food product past the rotating knife and through the fixed hole plate. The drive unit comprises a fan configured to discharge air from the drive unit. The drive unit housing and transfer case are configured so that the air discharged from the drive unit induces an airflow in the drive unit. The airflow is drawn into the drive unit through the transfer case, passes over a heat sink formed inside the transfer case, and exits the transfer case, passing through a cooling channel formed by the drive unit housing. The cooling channel extends along the length of the motor.

A support structure for a low-floor bus having front wheels and rear wheels, the support structure including a floor support structure having a front end and a read end, wherein the floor support structure is configured to receive front side rails on the front end of the floor support structure and rear side rails on the rear end of the floor support structure, and a first transfer case disposed on the front end of the floor support structure, wherein the first transfer case is configured to receive a first drive shaft from the low-floor bus on a first end of the first transfer case and to receive a second drive shaft on a rear end of the first transfer case, the second drive shaft is configured to drive the rear wheels.

The invention discloses an energy-saving type aircraft tractor intelligent driving control system, and relates to the technical field of vehicle driving control, an electric control clutch is connected in series between a transfer case and a rear axle, a controller unifies mechanical capacity, thermal capacity and synchronous bandwidth as permission functions, and permissible four-wheel drive is output; the pedal change rate and the motor torque are mapped into intention intensity, the two-drive slipping critical torque is estimated, a four-drive request / two-drive keeping is generated in combination with steering consistency and task intensity, and the four-drive request / two-drive keeping is submitted only when permission is established; arbitrating by using a state machine with manual priority, setting an entry / exit threshold value and de-jittering, and executing and coding back-off according to a pre-synchronization and torque law containing heat / speed difference suppression; actual energy and a constant four-wheel drive base line are metered in a fixed window, the duty and switching are counted, the energy / heat / smoothness composite cost is constructed, and weighted write-back is carried out on threshold projection. And safe connection is achieved, impact overheating is restrained, the duty energy consumption is reduced, and parameter consistency and migration are improved.

The utility model provides an integrated hydraulic system for a multifunctional seed melon harvesting machine, which comprises a transfer case, the first output end of the transfer case is connected with a slurry throwing pump and a header pump, the output end of the slurry throwing pump is connected with a slurry throwing motor group, and the output end of the header pump is connected with a header motor group; the second output end of the transfer case is connected with a walking pump, and the output end of the walking pump is connected with a walking motor. The third output end of the transfer case is connected with a threshing pump and a pushing pump, the output end of the threshing pump is connected with a threshing motor, and the output end of the pushing pump is connected with a pushing motor set. By the adoption of the multi-path power transmission device, output power of the engine is dispersed into multiple paths through the transfer case, the power of each path is converted into hydraulic energy through the hydraulic pumps, and the power is transmitted to the working devices of each path through the hydraulic motor; complex path transmission of power is achieved, noise and vibration are reduced, stability is good, and frequent maintenance and replacement of transmission parts are avoided.

The invention discloses a multi-axle chassis driving system and a crane, and belongs to the technical field of engineering machinery. The device comprises a mechanical driving device, a mechanical driving system and an electric driving system, the mechanical drive system comprises a front drive axle assembly and a rear drive axle assembly, and the mechanical drive device, the front drive axle assembly and the rear drive axle assembly form at least two-axle drive through a transfer case. The electric driving system is used for providing driving force for the whole vehicle when the getting-off power is insufficient or the transmission capacity is insufficient; the electric driving device replaces hydraulic driving, efficiency is high, the structure is simple, arrangement is convenient, complex hydraulic pipelines and hydraulic elements such as pumps and motors are omitted, and the oil leakage risk is reduced.

The utility model relates to the technical field of machine manufacturing, and discloses a turnover transfer case test trolley which comprises a support and a working table, grips are fixedly installed on the left side and the right side of the upper portion of the support, cushion blocks are fixedly installed on the left side and the right side of the support, bearings are movably arranged on the cushion blocks respectively, and the bearings are fixedly installed on the working table. A hand-cranking speed reducer is fixedly installed on the left side of the support, a transmission shaft is installed at the output end of the hand-cranking speed reducer, the other end of the transmission shaft is connected with a bearing on the left side, a rotating shaft is movably installed at the other ends of the two bearings, and baffles are fixedly installed at the upper end and the lower end of the working table top. According to the turnover transfer case test trolley, under the action of the turnover structure and the driving structure, the test precision can be improved, test data errors caused by inconvenient operation are reduced, the test precision is improved, operation is convenient, the angle of the transfer case can be flexibly adjusted according to actual needs, and the turnover transfer case test trolley adapts to different test environments and operation requirements.

The utility model discloses a remote control self-propelled small-sized sugarcane threshing machine, which relates to the technical field of agricultural machinery and comprises a machine body side cross rod, a gasoline engine is fixed at the upper end of the machine body side cross rod, a power input shaft is arranged on the surface of the gasoline engine, and a transfer case is in transmission connection with the surface of the power input shaft. The two sides of the transfer case are in transmission connection with a first power shaft and a second power shaft respectively, the other end, opposite to the transfer case, of the first power shaft is in transmission connection with a speed changer, the gasoline engine is used for outputting power, and the threshing function and the self-walking function of the threshing machine can be achieved at the same time; the steering of the threshing machine and the rotation stop of the threshing roller can be remotely controlled through the control cabinet; in addition, the wheel distance between the front axle and the rear axle in the walking device is the same as the width of a sugarcane ridge for planting sugarcanes in hilly and mountainous regions at present, so that the walking device is convenient to move in sugarcane fields.

The timely transfer system with the mechanical locking function comprises a transfer case transmission system and a gear shifting system, and the transfer case transmission system comprises an input shaft, a planetary speed reduction mechanism, a 4L combination sleeve, a rear output shaft and a rear output flange which are horizontally arranged in sequence; a front output shaft and a gear shifting shaft are arranged below the rear output shaft, a gear shifting cam, a gear shifting gear, a cam structure, a clutch, a driving chain wheel and a mechanical locking combination sleeve are sequentially arranged on the rear output shaft, and a driven chain wheel in transmission connection with a chain of the driving chain wheel is arranged on the front output shaft. The gear shifting system drives the gear shifting gear to rotate clockwise and anticlockwise; the driving cam mechanism compresses the clutch, transmits torque to the front output shaft and can drive the gear shifting shaft to move axially at the same time, the mechanical locking sleeve is combined, strong torque is transmitted to the front output shaft by arranging the mechanical locking sleeve, the strong cross-country requirement of customers can be met, and the clutch is protected. And a mechanical locking working condition and a timely four-wheel drive mode are compatible for use.

The utility model discloses a power switching engineering vehicle which comprises a transfer case, an auxiliary driving device and a control module. The transfer case comprises a first gear, an input shaft, a second gear, a driving gear, an intermediate shaft, a driven gear, an air cylinder shifting fork, an output shaft and an output gear. The sensor is installed on the air cylinder shifting fork and used for sensing the positions of the driven gear and the driving gear and outputting position signals to the control module. The control module is used for controlling the operation of the auxiliary driving device according to the position signal to drive the output shaft to rotate so as to change the phase of the driven gear; operation of the cylinder shifting fork is controlled to drive the driving gear to slide on the middle shaft in the axial direction, and meshing and separation of the driven gear and the driving gear are completed. Through cooperation of the sensor, the auxiliary driving device and the control module, phase adjustment of the driven gear can be achieved without starting a chassis engine, power switching is achieved through meshing and separation between the driving gear and the driven gear, operation is easy, use is reliable, and switching efficiency is high.

The invention discloses an intelligent multi-drive high-low pressure water tanker and a control method thereof, and relates to the technical field of water tanker, the intelligent multi-drive high-low pressure water tanker comprises a water tanker body, the water tanker body is provided with a carriage, the carriage is provided with a front bin, a middle bin and a rear bin, the front bin is provided with a high pressure plunger pump, the middle bin is provided with a water storage tank, and the rear bin is provided with a water pump. The rear bin is provided with a low-pressure water pump, the high-pressure plunger pump is connected with the water storage tank through a first pipeline, and the low-pressure water pump is connected with the water storage tank through a second pipeline. Power is obtained through the sandwich type power takeoff, power distribution is achieved through the transfer case, and power is provided for the high-pressure plunger pump, the hydraulic pump and the low-pressure water pump; the three power output modules cooperatively operate, so that the fire fighting truck has multiple functions of high-pressure precise fire extinguishing, low-pressure large-flow water supply, hydraulic equipment driving and the like, and the comprehensive capacity of the truck in a fire rescue task is remarkably improved.

The invention proposes to provide a drive wheel (2) of a distribution gearbox (1) with a nut thread and to screw it onto a screw thread (4) of a threaded shaft (3) such that the drive wheel (2) moves axially depending on the direction of rotation when the threaded shaft (3) is driven and thereby meshes with a first output wheel (6) in a first direction of rotation (I) and with a second output wheel (7) of the distribution gearbox (1) in an opposite second direction of rotation (II).