67results about How to "High braking torque" patented technology

The invention relates to a multiple-disc type magnetorheological brake which mainly comprises a transmission shaft, a wheel hub, a drive friction plate group, a driven friction plate group, inner and outer magnetic isolation rings, an exciting coil with a U-shaped iron core, magnetic-conducting side plates and a magnetic isolation casing. A sealing ring is used for sealing magnetorheological fluid between the drive friction plate group and the driven friction plate group; the drive friction plate group and the driven friction plate group are respectively sleeved on the magnetic isolation rings and the wheel hub through splines; the drive friction plate group is separated from the driven friction plate group by the inner magnetic isolation ring and the outer magnetic isolation ring; the exciting coil with the U-shaped iron core is directly spliced in iron core jacks of the magnetic conducting side plates; and the braking torque can be changed through changing the current intensity of the coil. When the braking torque is not enough, the quantity of friction plates can be increased or the quantity of the exciting coil with the U-shaped iron core can be increased to adapt to the big torque braking. The multiple-disc type magnetorheological brake has the advantages that the structure is compact, the braking torque is big, the assembly and the disassembly are convenient, the coil is easily used for radiating the heat, and the number of turns wounded by the coil is more.

The invention relates to a braking device for a vehicle and belongs to the technical field of vehicles. A braking disk is arranged between every two adjacent friction sheets of the brake so that a friction pair can be formed; an oil cylinder block is provided with an axial oil cylinder hole, a hollow driving piston with a step outer circle is installed in the large-diameter segment and the diameter-shrinkage segment of the oil cylinder hole, and the driving piston and an annular cavity formed at the diameter changing position between the large-diameter segment and the diameter-shrinkage segment form a driving braking oil cylinder; a parking piston is installed in the isolation segment and the diameter-enlarging segment, and the parking piston and an annular cavity at the diameter changing position between the isolation segment and the diameter-enlarging segment form a parking braking oil cylinder; parking springs are distributed in the parking piston in the circumferential direction in a spaced mode, return springs pressed and held by the pressing and holding end of return bolts are installed in the parking springs, and the ends, far away from the pressing and holding ends, of the return bolts penetrate through the bottom of the parking piston and are fixedly connected with the driving piston. According to the braking device, space is made full use of, the structure is very compact, the thermal load capacity of the friction sheets can be improved easily, service life is remarkably prolonged, and the braking device is very suitable for flexible configuration of various vehicles with narrow design spaces.

A system and method of immobilizing a vehicle include receiving a driver presence signal and a transmission state signal and commanding a transmission tie-up in response to the driver presence signal and the transmission state signal. In one embodiment, controlling a transmission element to tie-up a transmission includes braking approximately simultaneously a combination of transmission elements to inhibit rotation of a transmission output and maintaining transmission line pressure to maintain the transmission tie-up when an engine is off.

The invention relates to a vehicle gap adjustable conical brake device. The vehicle gap adjustable conical brake device comprises a barrel. The barrel is provided with a first end port and a second end port. A parking end cover is arranged in the first end port. A running end cover is arranged in the second end port. The parking end cover, the running end cover and the barrel define a cavity. A parking piston and a running piston are arranged in the cavity. One end of the parking piston can abut against the parking end cover, and the other end of the parking piston can abut against the running piston. The running piston can abut against the running end cover. A set of spring positioning grooves extending axially are evenly distributed in the parking piston. Parking springs are arranged in the spring positioning grooves and tightly abut against the parking end cover. The running piston is hollow, and a transmission shaft which is in sliding fit with the running piston is arranged in the hollow interior of the running piston. The vehicle gap adjustable conical brake device has the advantages that large brake torque can be achieved in a small mounting space, the brake effect is better, by adopting the nesting integral design of running and parking brakes, a parking brake does not need to be arranged independently, a vehicle frame space is saved, and great convenience is provided for overall vehicle arrangement.

The invention provides an oil pump dual-motor drive device with an electric-hydraulic power steering function. A main drive motor (brushless DC motor) directly drives an oil pump to rotate, and a secondary drive motor (brush DC motor) works in due time. The rotation speed, torque and other working states of the double motors can be adjusted in the manner that an electronic control unit collects steering wheel rotation speed signals, car speed signals, current signals of the double motors and the like, and dynamic coupling of the main drive motor and the secondary drive motor can be achieved through a synchronous belt and a belt wheel by means of a one-way clutch. The double motors, a power transmission and coupling mechanism, the steering oil pump and a steering controller are of an integrated structure, and the integrated design of the dual-motor electric oil pump can be achieved. According to the oil pump dual-motor drive device, a dual-motor distributed type control scheme is adopted, the degree of freedom of system control is improved; low-speed steering is convenient, and high-speed road feel is good; the motors work at high speed only when power assistance is needed, and rotate at low speed on the condition of no steering, and the energy consumption of a system is low; when one motor breaks down, the other motor can still provide a certain steering power, so safety of the system is improved.

The invention relates to a shell turn type inner-curve radial plunger hydraulic motor, which comprises a machine casing composed of a front cover, a stator and a rear cover. The machine casing is provided with an oil through shaft, a rotor and an oil distribution disc. The shell turn type inner-curve radial plunger hydraulic motor is characterized in that the oil distribution disc is sleeved on the oil through shaft and fixed with an inner scapula of the rear cover, a fixed brake seat is fixed on the periphery of the oil through shaft, the machine casing can rotate around the axis relative to the oil through shaft, and a plurality of dynamic friction sheets and a plurality of static friction sheets which are arranged at mutual intervals and in an overlaying mode are sleeved on the periphery of the fixed brake seat. A plunger is further arranged in the rear cover and sleeved on the fixed brake seat and can glide in the axial direction, a spring enabling the plunger to keep the mutual tight compression between the dynamic friction sheets and the static friction sheets is further arranged in the rear cover, a sealed oil cavity is formed between the plunger and fixed brake seat, and the fixed brake seat is provided with an oil hole communicated with the oil. The shell turn type inner-curve radial plunger hydraulic motor is provided with a brake structure organically combined with the hydraulic motor, thereby being compact and reasonable in structure.

The invention relates to a screw pump reverse rotation preventing braking method. An upper cover (1), a centrifugal support (2), centrifugal blocks (3), brake pads (4), limiting bolts (5), a connecting bolt (6), a circular nut (7), a spring (8), PTFE pads (9) and an outer shell (10) are included. A centrifugal braking system is composed of the centrifugal support (2), the centrifugal blocks (3), the brake pads (4), the limiting bolts (5), the connecting bolt (6), the circular nut (7), the spring (8) and the PTFE pads (9). During braking, the centrifugal blocks (3) are used for driving the brake pads (4) to rub with the inner wall of the outer shell (10) for braking. The centrifugal braking system can be arranged at the outer portion of a screw pump drive head together with the outer shell(10) and the upper cover (1) and can also be integrated into the screw pump drive head, a shell of the screw pump drive head serves as a friction face, and accordingly, the work effect of the centrifugal braking system is guaranteed.

The invention relates to a passenger vehicle gearbox impact test device and a test method thereof. The passenger vehicle gearbox impact test device comprises a supporting device for fixing a passengervehicle gearbox to be detected, a driving mechanism directly connected with one input end of the passenger vehicle gearbox to be detected, a brake mechanism connected with two output ends of the passenger vehicle gearbox to be detected, and a hydraulic loading device connected with the brake mechanism. The driving mechanism comprises a driving motor, an electromagnetic clutch, an inertia flywheelbox and an input transmission shaft which are connected in sequence. An input end torque rotating speed sensor is installed on an output shaft of the inertia flywheel box. The brake mechanism comprises an output transmission shaft, an output end torque rotating speed sensor, a middle support and a brake device which are connected in sequence. According to the invention, the instantaneous impact condition of the gearbox under the working condition of the whole vehicle can be scientifically simulated, an impact test process can be completed in a very short time, and the impact torque, the impact simulation inertia and the impact test rotating speed are adjustable.

The invention belongs to the technical field of underground coal mine auxiliary conveying device spare parts and specifically relates to a through shaft tapered-tooth planet wheel side reducer with a brake. According to the shaft tapered-tooth planet wheel side reducer with the brake, the problem that the width of an overall support conveying vehicle is large due to the fact that the occupied space of a motor directly inserting wheel side reducer is large is solved. The shaft tapered-tooth planet wheel side reducer with the brake comprises an input fork frame I, a first rolling bearing, an inner supporting frame, an input shell, a small bevel gear, a large bevel gear, a through shaft, a shaft sleeve, a radial bearing, an output fork frame II, a locking nut, a brake spring, a brake block, a brake fixed sleeve, a friction plate set, an inner gear frame, a second rolling bearing, a bearing shaft sleeve, a third rolling bearing, a main transmission shaft, a sun wheel shaft, a planet wheel, a planet carrier, a right end cap, a vent plug, a high-pressure oil injection port, a small end cap, a left end cap, a rack installing hole, wheel installing screw holes and a high-pressure oil cavity. According to the shaft tapered-tooth planet wheel side reducer with the brake, the through shaft tapered-tooth planet combined reducer is adopted, power of an engine or a motor can be input through the transmission shaft, and the axial size of the reducer is reduced.

The present invention relates to a transmission (1), in particular for an adjustment drive, comprising a housing (2), a worm shaft (3) which is rotatably mounted in the housing (2) and which can be driven, a worm wheel (4) which is rotatably mounted in the housing (2) and which meshes with the worm shaft (3), an encircling first wedge surface (5) which is formed on the worm wheel (4) or fixedly connected to the worm wheel (4), a brake element (6) which is arranged so as to be rotationally conjoint with respect to the worm wheel (4) and which has a second wedge surface (7), wherein the first wedge surface (5) bears areally against the second wedge surface (7).

The invention discloses a hydraulic motor integrating a wet brake. The hydraulic motor integrating the wet brake comprises a hydraulic motor body and a brake body, wherein the brake body is arranged on the tail portion of the hydraulic motor body, the brake body comprises a brake outer shell, braking pistons, a driving friction plate, a driven friction plate, reset springs, first reset spring bases, second reset spring bases and a transition disk, wherein the braking pistons, the driving friction plate, the driven friction plate, the reset springs, the first reset spring bases, the second reset spring bases and the transition disk are arranged in the brake outer shell. Internal teeth of the transition disk are meshed with external teeth of a transmission shaft of the hydraulic motor body, and the driving friction plate can rotate along with the transmission shaft of the hydraulic motor body when the transmission shaft rotates. When braking is not carried out, the driving friction plate and the driven friction plate are in a separated state. When braking is carried out, the braking pistons overcome force of the reset springs to move left, and braking begins when the reset springs make contact with the driving friction plate and the driven friction plate. Due to the facts that a braking mode of dynamic braking is adopted, and braking torque changes along with braking pressure in a linear mode, the slowly-opened function and the slowly-closed function can be achieved, and due to the fact that a braking cooling oil port is formed, the defect that a motor is poor in heat dissipation capacity can be overcome.

The invention relates to a spindle drive for a flap (2) of a motor vehicle, which spindle drive can be moved between two drive end positions, in particular between a retracted position and an extendedposition, wherein two drive connections (6,7) for channelling drive movements and a drive train (8) between the drive connections (6,7) are provided, wherein the drive train (8) has a motor unit (9)and a drive screw mechanism (10) arranged downstream of the motor unit (9) in terms of drive, wherein the drive screw mechanism (10) has a spindle (11) with a spindle external thread and a spindle nut(12) with a spindle nut internal thread which is in screwed engagement with the spindle external thread, wherein a braking arrangement (13) for braking at least part of the drive train (8) of the spindle drive (1) is provided. It is proposed that the braking arrangement (13) can be adjusted in terms of its braking action (B) and that, for its adjustment, the braking arrangement (13) is coupled toa component (15) of the drive train (8).

A method and an apparatus for balancing a motor vehicle wheel, in which the torque during acceleration to the measurement rotation speed and during braking after carrying out the measurement run is adjusted as a function of the wheel type to be balanced, such that the rotationally fixed connection between the main shaft and the motor vehicle wheel is maintained even when the driving prestressing force between the main shaft and the motor vehicle wheel is reduced.

The invention provides a point-projection wedge-shaped blade brake-stage stator and rotor assembly. Stator blades and rotor blades are in a wedge shape with the width gradually increasing from top to bottom and from blade bottom to blade top. The multiple stator blades are circumferentially arranged between the outer wall of a stator leaf crown and the inner wall of a stator body in an inclined mode. The multiple rotor blades are circumferentially arranged between the outer wall of a rotor body and the inner wall of a rotor leaf crown in an inclined mode. The stator blades and the rotor blades are the same in inclining angle and inclining direction. Both the stator blades and the rotor blades are formed through point projection. The point-projection wedge-shaped blade brake-stage stator and rotor assembly is small in hydraulic loss and large in braking torque; after a certain number of point-projection wedge-shaped blade brake-stage stators and rotors and a certain number of turbine-stage stators and rotors are assembled together, working time of a turbine drill can be obviously prolonged, overload capacity of the turbine drill can be obviously improved, stability can be obviously improved when the turbine drill works at a low rotating speed, and the footage during turbine drilling can be obviously increased.

The invention discloses a compact type annular axial high accuracy positioning and clamping mechanism, and a using and manufacturing method thereof. The clamping mechanism comprises a base, a sealing ring, an annular clamping plate and a revolved body, wherein the annular clamping plate is fixed on the revolved body or the base through sunk screws; when the revolved body is located to be stopped at any position, liquid and gas can be pressed in an annular sealing cavity, a sealed piston device can generate a certain displacement in the axial direction, the axial force is uniformly acted on the annular face of the annular clamping plate, and the annular clamping plate is pressed to be deformed, so that friction torque is generated to carry out angle positioning and clamping on the revolved body; the revolved body cannot be axially displaced or twisted when the positioning and the clamping occur, so that high accuracy positioning and clamping can be realized; when the liquid pressure and the gas pressure are completely unloaded, the annular clamping plate is immediately rebounded to be at the initial situation, and the revolved body can be released and revolved at will.