1065results about "Fluid gearings" patented technology

A power transmission device for a vehicle includes a housing that accommodates a power transmission mechanism, and a control valve configured to control a pressure of oil supplied to the power transmission mechanism. The power transmission mechanism includes an input shaft, an intermediate shaft, and an output shaft. The housing defines an insertion hole for a charging pipe. The output shaft is located farther toward a rear of a vehicle than the input shaft. The intermediate shaft is located above the output shaft. The control valve is arranged upright on a vehicle front side of the input shaft. The housing is provided with a recessed portion that is recessed inwardly in a region of the housing below the intermediate shaft and further toward the rear of the vehicle than the output shaft. The insertion hole is provided in a bottom section of the recessed portion when viewed from above.

A power transmission device includes a housing that accommodates a power transmission mechanism, a partition section that is provided in the housing and that supports the power transmission mechanism, a first oil path that is provided inside the partition section, a second oil path that is provided inside the partition section, a recess that is provided in the partition section, and a filter member that is disposed inside the recess. The recess is provided with an opening facing a direction of an axis of rotation of the power transmission device. The first oil path and the second oil path communicate via the recess.

Methods and systems for detecting a torque transmission failure in an aircraft power plant are provided. The system comprises a hydrostatic transmission for transmitting torque between a first shaft and a second shaft using hydraulic fluid, an a failure detector including a sensor configured to detect a pressure change in the hydraulic fluid. The failure detector is configured to generate an output indicative of the torque transmission failure in response to the pressure change having crossed a threshold.

Systems, methods, and devices are provided for a turbine driven pump gearbox. A turbine engine may drive a primary shaft having gears. The gears may selectably engage with gears of a secondary shaft that drives a machine (e.g., pump). By changing which gears of the primary shaft engage with which gears of the secondary shaft, a gear ratio may be changed. A power takeoff device (e.g., a generator) may be connected to the primary shaft and may be operated in reverse as a motor to rotate, slow, stop, and / or reverse rotation of the primary shaft. Brakes may be associated with one or more of the primary and secondary shafts. The power takeoff device and one or more of the brakes may be controlled to shift engagement of the shafts between different positions, changing the gear ratio and / or disengaging the shafts from each other.

The invention discloses a compact-structure transmission which comprises a gearbox body, a torque converter is mounted on the outer side of the gearbox body, a turbine shaft of the torque converter is connected with a clutch shaft on the gearbox body, and the clutch shaft, a first idler shaft, a second idler shaft, a front axle gear shifting output shaft and a rear axle output shaft are arranged in the gearbox body; the clutch shaft is movably connected with a first gear and a second gear through bearings, a third gear and a fourth gear are fixed or formed on the first idler shaft, and a fifth gear, a sixth gear, a seventh gear and an eighth gear are fixed or formed on the second idler shaft. The front axle gear shifting output shaft is movably connected with a ninth gear, a tenth gear, an eleventh gear and a twelfth gear; a manual control mechanical gear shifting structure and a wet clutch control reversing structure are adopted, multi-gear advancing and retreating are achieved, the size is small, and occupied space is small.

The invention relates to the technical field of hydraulic mechanical transmission, in particular to a hydraulic torque converter assembly, a vehicle and a control method. The hydraulic torque converter assembly comprises a hydraulic torque converter, a pressure adjusting assembly and a rotating direction adjusting assembly, wherein the hydraulic torque converter is provided with an output shaft; the pressure adjusting assembly is connected to an oil inlet of the hydraulic torque converter and used for adjusting the pressure of the oil inlet of the hydraulic torque converter. The rotating direction adjusting assembly is connected with the output shaft and used for changing the rotating direction of the output shaft. When a vehicle goes down a long slope, the rotation direction of the output shaft is changed through the rotation direction adjusting assembly, the requirement for long-time retarding braking of the vehicle is met through the reverse rotation characteristic of the torque converter, compared with traditional reverse transmission braking, higher braking torque can be provided, and due to the fact that the pressure of an oil inlet of the hydraulic torque converter is adjustable, automatic adjustment can be conducted according to different braking torque requirements; and different slope requirements when the vehicle goes down a long slope working condition are met.

The hydraulic rock drill comprises a machine body composed of a machine tail part, a cylinder body part, a middle body part and a machine head part which are connected in sequence, and the machine tail part and the cylinder body part jointly form an impact assembly. The middle body part comprises a rotary assembly and a buffer assembly, and the machine head part comprises a washing assembly; the impact assembly and the buffer assembly jointly form a first cavity used for containing an impact piston. The rotary assembly and the flushing assembly jointly form a second cavity used for containing the bit shank, and the first cavity is communicated with the second cavity; the impact assembly introduces hydraulic oil into the first cavity, the impact piston can be pushed by the hydraulic oil to reciprocate along the central axis of the first cavity, and the head of the impact piston can penetrate out of the first cavity, enter the second cavity and impact the tail of the bit shank. The tail part of the bit shank is inserted into the rotary assembly and drives the bit shank to rotate along the central axis through the rotary assembly; a central hole extending towards the head of the bit shank is formed in a front-section rod body of the bit shank, and the flushing assembly injects flushing media into the central hole.

The invention provides an anti-impact characteristic heavy-load electric cylinder based on a hydraulic buffering mechanism and a control method thereof, and relates to the technical field of power driving systems. Comprising a motor, a controller and a speed reducing mechanism, and an output shaft of the speed reducing mechanism is connected with a lead screw; a piston, a piston rod and a lead screw nut connected to the lead screw are arranged in the cylinder barrel, the lead screw nut is connected with the piston, and the piston is connected with the piston rod. The interior of the piston rod is hollow so as to form a movable cavity for the lead screw to move; the piston is suitable for dividing the interior of the cylinder barrel into a rod cavity and a rodless cavity which are isolated from each other, and an oil through hole for communicating the rodless cavity with the movable cavity is formed in the piston; the hydraulic system is provided with a first oil way communicated to the rodless cavity and a second oil way connected to the rod cavity; the first oil way and the second oil way are connected to an oil supply system through a reversing valve. According to the scheme, the heavy load bearing capacity of the electric cylinder is improved.

To allow operation of a wind power generation device even at a low wind speed.SOLUTION: A low wind speed starting device 300 for a wind power generation device is provided in a power transmission system from a wind turbine 100 to a power generator 600. The power transmission system comprises the wind turbine 100, a speed increaser 500, the power generator 600, and power transmission shafts PS1, PS2, and PS3 connecting them. The low wind speed starting device 300 for the wind power generation device is a torque converter 300. The torque converter 300 comprises a direct connection mechanism. An input shaft of the torque converter 300 is connected to a main shaft PS1 that is a power transmission shaft from the wind turbine 100. An output shaft of the torque converter 300 is connected to an input shaft PS2 of the speed increaser 500. Thereby, torque of rotation output from the wind turbine 100 is amplified and transmitted to the power transmission system.SELECTED DRAWING: Figure 4

The invention provides a motor air suction prevention method and device and a hydrostatic driving vehicle, a hydrostatic driving system comprises a pump and a motor, the hydrostatic driving system is used for transmitting power between an engine and driving wheels, and the method comprises the steps that in response to operation of stepping on a brake pedal, the angle change rate of the brake pedal is obtained, and the angle change rate of the brake pedal is obtained; the angle change rate is the ratio of the rotation angle of the brake pedal to the rotation duration of the brake pedal; and under the condition that the angle change rate is larger than or equal to the preset threshold value, the displacement of the pump is controlled to be 0, the motor is controlled to increase the displacement according to the preset rate until the maximum displacement of the motor is achieved, and the problem that in the prior art, the cost is high when an oil supplementing pipeline is used for preventing air suction of the motor is solved.

A hydraulic fracturing system includes a hybrid electric transmission assembly to transfer power from an internal combustion engine to a hydraulic fracturing pump. The transmission assembly includes a first driveshaft coupled to the engine and a second driveshaft coupled to the pump with a primary drivetrain gear assembly coupling the first driveshaft to the second driveshaft. An electric drive gearset is disposed between the primary drivetrain gear assembly and the pump. An electric motor is couplable to the electric drive gearset, thereby allowing power to be passed from the electric motor to drive the pump and bypass the primary drivetrain gear assembly during the gear change. The system may include a plurality of electric motors each having an electric motor axis and an output gearset coupled to the electric drive gearset, where each of the electric motor axii are spaced radially outward from the first and second driveshafts.

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 invention discloses a novel cross-country forklift, which relates to the technical field of hydraulic hybrid power systems of engineering machinery and comprises the following modules: a power module for providing driving power of the whole forklift; the power division module is used for realizing double-flow power division and convergence and comprises an integrated mechanical gear speed change unit and a hydraulic stepless speed change unit; the mechanical transmission module is used for transmitting the power of the mechanical direct drive branch to the drive part; the hydraulic execution module is used for realizing a dynamic characteristic cooperative control technology and matching the flow of a hydraulic system with a mechanical gear speed ratio by establishing a speed-torque-pressure three-parameter coupling model; a composite speed change module; and a control and management module. By adopting double-flow power division and convergence, power division of 70% mechanical energy direct drive and 30% hydraulic energy speed regulation is achieved, and the traditional transmission efficiency bottleneck is effectively broken through. And under the rugged terrain and the variable-load working condition, the energy utilization rate can be increased, fuel consumption is reduced, and the whole machine has higher economical efficiency and durability.

The utility model discloses a strip rotary tillage soil preparation machine capable of pressing through hydraulic driving, which relates to the technical field of strip tilling machines and comprises a rack, and first side plates are distributed on two sides of the rack; the gearbox is positioned on the rack; the hydraulic pump is connected to the output end of the through shaft; the hydraulic pump is in driving connection with the hydraulic motor; the hydraulic motor is in driving connection with the compacting structure; the first chain transmission part is connected to the output end of the half shaft; external power is input through the through shaft and is transmitted to drive the cutter shaft assembly to rotate through the gearbox and the first chain transmission part in sequence so as to realize soil crushing operation; external power is input through the through shaft and is transmitted to drive the compacting structure to move through the gearbox, the hydraulic pump and the hydraulic motor in sequence so as to realize soil compacting; the machine adopts hydraulic control to drive compacting, the side box to drive the cutter shaft to operate in two directions, and mechanical and hydraulic dual-drive to control row spacing, so that the defect that a hydraulic device of a tractor cannot work for a long time is overcome, a better configuration rotating speed is provided for the compacting device, the compacting effect is obvious, and the effect of preventing water evaporation is achieved.

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.

Provided is a working vehicle operation control system that can suppress wear of a crawler. A working vehicle operation control system includes: a hydraulic pump that is driven by an engine; left and right hydraulic motors; and a hydraulic pump control unit that controls a pressurized oil discharge amount of the hydraulic pump after an engine starts, and controls a traveling operation of a working vehicle. The hydraulic pump control unit controls, in a case where one of a right-side crawler traveling speed and a left-side crawler traveling speed of the crawler is not more than a predetermined traveling reference speed and the other of the right-side crawler traveling speed and the left-side crawler traveling speed is not less than the predetermined traveling reference speed, the pressurized oil discharge amount of the hydraulic pump so as to decrease the other crawler traveling speed.

The invention discloses a high-power petroleum fracturing truck transmission system which comprises a torque converter and a gearbox which are integrated, and the gearbox is of a fixed shaft and planet structure. The torque converter comprises a shell a, a torque conversion mechanism is arranged in the shell a, and the torque conversion mechanism is connected with an input assembly; the gearbox comprises a shell b, the shell b is fixedly connected with the shell a, a parallel shaft transmission system in transmission connection with the output end of the torque conversion mechanism and a planet wheel transmission system in transmission connection with the output end of the parallel shaft transmission system are arranged in the shell b, and the output end of the planet wheel transmission system is connected with the output assembly; the gear of the parallel shaft transmission system is three, the gear of the planet wheel transmission system is three, and the gear of the parallel shaft transmission system is nine. The advantages of fixed shaft transmission and planetary transmission are combined, balance is carried out, the reliability is high, meanwhile, the weight can be reduced, and the transmitted torque can be improved. And the torque converter and the gearbox are integrally arranged, so that the overall size is reduced, and the mounting space is saved.

The invention relates to the technical field of plunger pumps, in particular to a variable flow plunger pump which comprises a driving unit, a plurality of variable pumps, a plurality of variable flow executing mechanisms and a transmission mechanism. The variable pumps are connected with the driving unit; the variable flow executing mechanisms are connected with the variable pump. The transmission mechanism comprises a plurality of driving transmission parts and a driven transmission part, the driving transmission parts are located on the outer side of the driven transmission part and connected with the driven transmission part, and the driving transmission parts are connected with the variable flow executing mechanism. According to the variable-flow plunger pump, the variable pump is driven by the driving unit to output variable-flow hydraulic oil, large-range real-time adjustment of flow can be achieved through cooperation of the variable pump and the variable-flow executing mechanism and variable-flow control, adjustment is accurate, and large-torque output of the variable-flow executing mechanism at different rotating speeds is guaranteed; the multiple driving transmission pieces drive one driven transmission piece to rotate, stress is uniform, the abrasion loss is reduced, and the structure is more compact.

The present disclosure provides a mechanical-electrical-hydraulic composite transmission device and a control method thereof. The device includes an input shaft assembly, a power-split assembly, a hydraulic transmission assembly, an electrical variable transmission assembly, a mechanical transmission assembly, a power-convergence assembly, and an output shaft. Three types of transmission modes including single transmission modes, power-split composite transmission modes, and power-convergence composite transmission modes are implemented by controlling engagement and disengagement of clutches and a brake. The present disclosure has the following beneficial effects: Free switching between various transmission modes is realized, the requirements of engineering machinery for a transmission device with multiple modes in different working conditions are satisfied, the engine power utilization is improved, and the fuel economy is increased. The shift impact is effectively reduced and the speed ratio adjustment range is expanded. The hydraulic transmission enables quick startup and stable operation and implements speed variation and direction change easily and rapidly without causing impact. The electrical variable transmission has a continuously changing transmission ratio and causes extremely small impact on the mechanism during operation.

The present invention discloses a large-torque and low-speed compliant transmission device based on magnetorheological fluid, which comprises a fixed base, a housing, a rotating shaft, an upper swing frame and a lower swing frame; the housing is connected to the upper swing frame and moves synchronously with the upper swing frame. An upper magnetic isolation ring is fixed inside the housing, and a main excitation coil is evenly wound in the annular space inside the upper magnetic isolation ring; a driven wheel is fixedly sleeved on the upper part of the rotating shaft, and two sealing rings are rotatably connected inside the housing, and an upper sealing cavity is formed between the two sealing rings, the inner ring of the upper magnetic isolation ring and the outer ring of the driven wheel; a lower magnetic isolation ring is fixed at the middle position of the lower swing frame, and a secondary excitation coil is evenly wound in the annular space inside the lower magnetic isolation ring; two sealing plates are welded and fixed at the lower end of the rotating shaft at intervals up and down, and a lower sealing cavity is formed between the two sealing plates, the inner ring of the lower magnetic isolation ring and the outer wall of the rotating shaft; the upper sealing cavity and the lower sealing cavity are respectively filled with magnetorheological fluid. The present invention can achieve the compliant start and stepless speed regulation functions of the transmission system.

To achieve a plurality of forward moving modes without complicating a structure.SOLUTION: A torque converter amplifies torque of a first rotation direction. A first torque transmission path 6a transmits torque through a torque converter 3. A second torque transmission path 6b transmits torque without through the torque converter 3. A first gear train 41 outputs the torque directed in the first rotation direction as forward torque. A second gear train 42 outputs the torque directed in the first rotation direction as reverse torque. A controller 9 controls a motor 2 so as to rotate in the first rotation direction and at the same time, outputs torque via the first torque transmission path 6a and the first gear train 41 in a first forward moving mode, and controls the motor 2 so as to rotate in a second rotation direction and at the same time outputs the torque through the second torque transmission path 6b and the second gear train 42 in a second forward moving mode.SELECTED DRAWING: Figure 1

A method of making a wet friction material includes coating a first outer surface of a cellulose layer with a friction coating; placing a matrix of fibers and filler particles on a second outer surface of the cellulose layer; and saturating the matrix of fibers and filler particles with a binder and curing the binder to join the matrix of fibers and filler particles together to form a wet friction material base layer and to join wet friction material base layer to the second outer surface of the cellulose layer.

The pneumatic power device includes an annular gas storage vessel (1), a starting system, and an output system. A plurality of cylinders (2) are uniformly arranged around the inner wall of the annular gas storage vessel, and the cylinder body cavities of the cylinders are connected to the cavity of the annular gas storage vessel. The piston rods (3) of the cylinders are provided with racks (4). The starting system includes a power source, a drive unit (15), a speed reducer / torque increaser mechanism, and a cam (5). The power source is electrically connected to the drive unit, and the drive unit is power-transmittingly connected to the cam by the speed reducer / torque increaser mechanism. The piston rod ends of each cylinder abut against the cam. The output system includes a one-way transmission mechanism and an output shaft (10). The one-way gear (7) at the input end of the one-way transmission mechanism is meshed with the rack, and each rack is power-transmittingly connected to the output shaft by a one-way transmission mechanism. Only when the piston rods of the cylinders are extended does the rack and the output shaft rotate. The pneumatic power plant has little dependence on traditional fuels and effectively avoids dependence on thermal energy resources, reducing emissions, saving energy and being environmentally friendly, while at the same time solving the problems of energy crisis and air pollution.

To enable independent control of a machine component such as a flight control surface by hydraulic force by a hydraulic system and mechanical force by an electric motor.SOLUTION: A double independent type hybrid type actuator system 100 includes an actuator body 110 defining a hydraulic chamber. The actuator system 100 is disposed in the hydraulic chamber, and includes a hydraulic piston assembly 118 that includes a hydraulic piston 120 dividing the hydraulic chamber into a first hydraulic sub chamber 112A in fluid communication with a first hydraulic fluid passage 114 and a second hydraulic sub chamber 112B in fluid communication with the second hydraulic fluid passage 116. The actuator system 100 further includes an electric motor 140 attached to the actuator body 110, and a screw wheel 150 mechanically united to a motor shaft 142 of the electric motor 140. The screw wheel 150 is engaged with a screw port 152 formed in the hydraulic piston assembly 118.SELECTED DRAWING: Figure 1

A hybrid module includes a rotor carrier, a torque converter, and a thrust bushing. The rotor carrier includes an axially extending portion and a radially extending portion extending radially inward from the axially extending portion. The torque converter includes an impeller having an impeller shell fixed to the rotor carrier and an impeller hub fixed to the impeller shell. The impeller hub extends in an axial direction away from the radially extending portion of the rotor carrier to a distal end. The thrust bushing is connected to the impeller hub. The thrust bushing includes an axial portion in contact with the impeller hub and a radial portion extending radially outward from the axial portion. The radial portion is in contact with the distal end.

[Problem] A transmission structure that may improve a traveling feeling when a drive traveling state is interrupted in traveling and then the drive traveling state is resumed is provided. [Solution] A control device actuates a clutch actuator so that only a clutch mechanism on a most downstream side in a transmission direction in a selected shift gear is brought to a disengaged state when receiving a power cut-off signal in a state in which a traveling state change member is subjected to a forward operation or a reverse operation, and, actuates the clutch actuator so that only the clutch mechanism on the most downstream side in the transmission direction in the selected presumed shift gear is brought to a disengaged state based on a traveling state, and in addition, actuates a gear shift actuator so that a gear ratio of a continuously variable transmission mechanism that realizes a vehicle speed at that time point in the presumed shift gear is obtained while the power cut-off signal is valid, and actuates the clutch actuator so that the clutch mechanism on the most downstream side in the transmission direction in the presumed shift gear at that time point is brought to an engaged state when a cancel signal for canceling the power cut-off signal is input.

A torque converter includes a lock-up device, an urging member, a cover, an impeller, a turbine, a first hydraulic chamber, and a second hydraulic chamber. The lock-up device includes a clutch part and a piston. The urging member urges the piston toward the clutch part. A first oil pathway communicates with the first hydraulic chamber. A second oil pathway communicates with the second hydraulic chamber. A switch is provided. In a first switch position, hydraulic oil is supplied to the first hydraulic chamber through the first oil pathway. In a second switch position, hydraulic oil is supplied to the second hydraulic chamber through the second oil pathway. The piston presses the clutch part when the hydraulic oil is supplied to an interior of the first hydraulic chamber. The piston releases the clutch part when the hydraulic oil is supplied to an interior of the second hydraulic chamber.

The invention discloses a method, a device and equipment for processing clamping stagnation of a hydraulic control loop of a hydraulic torque converter. The method, the device and the equipment are used for realizing self-cleaning of clamping stagnation of the hydraulic control loop of the hydraulic torque converter. The method comprises the steps that vehicle gear information, the vehicle speed, the engine rotating speed and the turbine rotating speed are obtained; when the vehicle gear information, the vehicle speed, the engine rotating speed and the turbine rotating speed meet the target conditions, it is determined that the hydraulic torque converter hydraulic control loop is in a clamping stagnation state; and when the hydraulic control loop of the hydraulic torque converter is in a clamping stagnation state, the hydraulic torque converter is controlled to control the current of the electromagnetic valve to change in a pulse form.

The novel 20Kw aluminum alloy PTO gear box comprises a front box cover, an input shaft and a large gear, a rear box cover is installed on the outer side of the rear end of the front box cover, a vent valve is arranged in the upper end of the front box cover in a communicating mode, and an output shaft is installed in the upper end of the rear box cover; an input shaft is installed in the lower end of the front box cover in a penetrating mode, and the rear end of the input shaft is connected with a bearing. A large gear is installed on the outer side of the input shaft. The utility model belongs to the technical field of PTO gear boxes, and aims to solve the problems that in the prior art, a hydraulic system of a tractor is small in flow, a power output shaft and a gear pump are difficult to install, and a small-power gear box is insufficient in power, so that the flow of the gear pump connected with the small-power gear box is insufficient. The technical effect is that the problems that the flow of a hydraulic system of the tractor is small, the power output shaft and the gear pump are difficult to install, and the flow of the gear pump connected with a small-power gear box is insufficient due to insufficient power of the small-power gear box are effectively solved.

The present invention relates to a damping system for a hydraulic coupling device, comprising: an output hub having a central axis and an annular portion around the central axis, wherein a first track is arranged in the annular portion; a plurality of turbine mass groups evenly distributed around the central axis, each turbine mass assembly comprising a turbine section, each turbine section carrying a plurality of blades and provided with a second track corresponding to the first track; a roller capable of rolling along a roller track defined by the first track and the corresponding second track, so that the turbine mass assembly can move relative to the output hub and apply torque on the output hub; wherein each turbine mass assembly also comprises a mass plate fixedly connected to the turbine section, and the output hub is arranged between the mass plate and the turbine section. The present invention also relates to a hydraulic coupling device comprising such a damping system and a motor vehicle comprising such a hydraulic coupling device.