217 results about "Band brake" patented technology

The invention relates to a device and a method for on-line three-dimensional measuring of a laser radar of heavy forging in the measuring technical field, which comprises a two- dimensional laser radar, a servo-motor, a junction box, a rotary main shaft, a spacing and null point sensor, a bearing block which is provided with a bearing, a band brake apparatus, a back supporting stand of the laser radar, an L-shaped mounting bottom plate, a vertical mounting chassis, a movement-control card, a data collecting card, and a computer which is used for processing data. Firstly, the laser radar is positioned on the horizontal surface of a forging axial cord, then four surfaces of the forging are respectively scanned by the laser radar, the two-dimensional laser scanning radar is scanned in the surface which is vertical to an axial cord of the forging, the servo-motor drives the laser radar to rotate in the horizontal surface, thereby the three-dimensional scan of the forging is realized, finally, shape and parameter of the forging are gained through data process, and deviation of the shape of the forging is gained. The invention greatly increases accuracy and speed of identification, enlarges range of application, satisfies measuring requirement of a forging, and effectively increases measuring accuracy and efficiency of the forging.

The invention relates to a device and method for measuring resistance and postures of a ship module. The device consists of an S-shaped resistance dynamometer, a trolling supporting rod, a guyed displacement measuring mechanism, a guide frame assembly and a band brake mechanism. When the device trolls a pool for measuring the resistance of the ship module, the device can also obtain a trim angle and the heaving postures of the head and the tail of the ship module, and resistance measuring under a stable speed condition of the ship module is realized by the interworking of the resistance dynamometer and the band brake mechanism; a wire is driven by the head and the tail of the ship module through utilizing the guyed displacement measuring mechanism, so that a corresponding voltage is outputted by a potentiometer, and a vertical displacement variation value of a bow and a vertical displacement variation value of a stern of the ship module are obtained through a straight-line relation; and a trim angle of the ship module, a heaving value of the ship module, the vertical displacement variation value of the bow and the vertical displacement variation value of the stern of the ship module are calculated; during trolling, the situation that the ship module moves freely in a vertical direction can be guaranteed by the guide frame mechanism, and the situations that a rolling cylinder is low in vertical sliding friction and free in vertical movement are guaranteed by utilizing a rolling shaft.

The present application is directed to a system providing automatic and manual control of a brake lever on band brake drawworks of a wellbore drilling rig. The system comprises a pneumatic cylinder attached to the brake lever; and a control means in fluid communication with the pneumatic cylinder, the control means being operationally configured to run the pneumatic cylinder in response to information obtained by the control means concerning one or more drilling parameters and operationally configured to disable the pneumatic cylinder.

The invention discloses a deduction method for the initial magnetic pole position of a permanent magnet synchronous motor, in which, firstly, when the elevator band brake is not switching-on, approximate initial magnetic pole position is calculated by the salient pole saturation effect and formula(1); then a vector transformation control is used, supposing an orthogonal shaft (D, Q) when the rotor magnetic linkage and force moment current position are not accurately known, supposing the setting of the Q shaft is zero, and meanwhile a D shaft current vector Id' twice of the motor rating current, constructing a position ring, according to the motor rotary direction after switching-on the band brake, countermovement on the setting current vector Id' direction allows the motor to quickly balance and static; finally the current vector (2) at this time is directly to the load to once more balancing, and then using the triangular theorem to obtain a formula (3), thereby requesting an actual motor load T'and an accurate motor magnetic pole position beta. The invention possesses the advantages of not only being capable of obtaining load values at the motor shaft terminal, but also being capable of more accurately testing the initial magnetic pole position, thereby the startup will be more comfortable and smoothing.

An electrically driven wheel includes a wheel disc and a wheel hub; an in-wheel motor mounted within the wheel disc to drive the wheel disc and the wheel hub or to be driven by the wheel disc and the wheel hub; a brake rotor and a brake caliper suppressing rotation of the wheel disc and the wheel hub while a vehicle is moving; and a parking lock mechanism provided in the in-wheel motor separately from a brake mechanism formed of the brake rotor and the brake caliper. The parking lock mechanism is a band-type brake frictionally engaging a planetary carrier serving as an “output portion” of a “reduction mechanism”.

A portable rowing machine is disclosed that includes a tubular frame consisting of two parallel tubes positioned and supported by floor brackets, a seat that is removably situated on top of the tubular frame and slidable along the tubular frame on rollers mounted to the underside of the seat, swivel arms attached to brackets and extending perpendicularly outward from the tubular frame, and oar arms attached to the ends of the swivel arms. The tubular frame includes a telescoping portion enabling adjustment of the length of the frame from a compact storage size to a size desired for a users leg length. The swivel arm brackets are pivotally positionable in a storage position and a working position. The oar arms are adjustable in length to suit the users body size. A clutch bearing and band brake assembly provides oar arm motion resistance comparable to rowing a boat.

The invention provides a two-wheel self-balancing electric vehicle provided with a hand brake system, belonging to the technical field of two-wheel balancing vehicles. The two-wheel self-balancing electric vehicle provided with the hand brake system mainly comprises a main control display board, power supplies, left and right wheels, left and right wheel driving motors, a hydraulic control system, a braking system, a main control system, a steering mechanism, a front-mounted hydraulic undercarriage, splash guards and front and rear LED (Light-Emitting Diode) alarming lamps, wherein braking handles are arranged on the handles of the two-wheel vehicle, and are connected with disc-type brakes through brake cables; the disc-type brakes are arranged on tire hubs; braking control is realized by pulling the braking handles; the front-mounted hydraulic undercarriage is arranged on the front end of a box body; and the folding and unfolding processes of the undercarriage are controlled through program determination of a single-chip microcomputer controller and folding and unfolding buttons on the vehicle handles. The two-wheel self-balancing electric vehicle provided with the hand brake system is simple for assembly and compact in structure; the safety of a user is greatly improved, and meanwhile, the operation difficulty is greatly lowered; and a user range is widened.

The invention discloses a detection method of braking response time of a brake of an elevator. A method for detecting the braking response time of the brake of the elevator by the aid of a band brake micro-switch is relatively large in error and low in accuracy. According to the method, a spring plate with a resistance strain gauge attached is additionally mounted at one end of each brake spring, when the brake performs braking, the compression amounts of the brake springs are gradually reduced, when the brake completes braking, the compression amounts of the brake springs are minimum, the strain of the spring plates is minimum at the moment, the strain of the resistance strain gauges is also minimum, the change of the brake springs is detected through the resistance strain gauges and strain indicators, the braking response time of the brake is the time difference between an outage signal and the minimum strain moment of the resistance strain gauges, and the time difference can be directly read through a two-channel oscillography recording instrument. The method has the very high detection accuracy and universality and is also easy to operate.

The invention discloses an elevator starting torque compensation method in an elevator control system. The method comprises the following steps: firstly the load weight information obtained from a weighting device is sent to a controller to be used as the original value of torque command before a general elevator band brake releases, then the brake is released, the speed command of the controller stays the same during the brake-braking process until the band brake is completely opened; and if weighting is accurate, the elevator can not move during the process, thus the weighting deviation can be judged by observing the actual speed of the elevator and the corresponding compensation can be carried out. The method of the invention is used in the elevator control system with the weighting device, better solves the starting problem of the elevator when the weighting is not accurate and ensures that the dependency of the elevator on the weighting device can be reduced greatly.

The invention relates to a two-plate type mould locking device, which comprises a movable template (1), a fixed template (2), pull rods (5), mould locking pistons (8) and a band brake oil cylinder (9), wherein the pull rods (5) are fixed to the four corners of the plane of the fixed template (2) through pull rod nuts (18); the movable template (1) is arranged on the pull rods (5); a mould moving oil cylinder (3) is arranged at a diagonal position of edges on the two sides of the fixed template (2); an output end of the mould moving oil cylinder (3) is connected with the corresponding side edge of the movable template (1); piston rear covers (7) are arranged on the four corners of the movable template (1); the mould locking pistons (8) are arranged in the piston rear covers (7); and a transmission system is arranged on the mould locking pistons (8). The two-plate type mould locking device has the advantages of simple structure, simple control, less parts, low cost and high reliability.

The present invention relates to a wheelchair with forced driven front caterpillar wheels with a cable-hauling ratchet lever by which a user, by himself / herself, can pass over a road-block or drains on roads, lifts up the caterpillars from the ground for easy steering on caster wheel, engages / disengages the drive wheel having ratchet clutch in the detachable wheel hub to idle the drive wheel / caterpillars for converting from / to manual drive to / from drive by auxiliary power source, and prevents the drive wheel from rolling backward during climbing inclines and controls speed continuously on a slope by a band brake means. So the disabled persons on their legs can travel to outdoors by himself / herself without a care of neighbors.

A clutch-type brake arranged on the drive shaft for having the functions of both clutch and brake features that the driven part of friction clutch is fixed to spool, a band brake is arranged on the driven part of overriding clutch, the ratchet mechanism is used in conjunction with the band friction mechanism, and the ratchet mechanism is installed in the planetary clutch. It is used for hoister.

The invention relates to a vertical shaft typed windmill centrifugal ball typed braking device, belonging to the technical field of wind power generation. The device comprises a hollow inner shaft, a shaft sheath, an upper braking disc, a connection rod, a lower braking disc, a centrifugal ball rolling groove, a centrifugal ball, and a hand brake. The hand brake comprises a transmission connection rod, a connection rod location support, a returning spring, a limit ring and a brake handle. When wind speed exceeds a rated wind speed, centrifugal force increases and the centrifugal ball rolls outwards, propping up the support leg of the lower braking disc and pushing the lower braking disc upwards to contact the upper braking disc, thus starting the brake. Due to the brake, the rev deceases, and the centrifugal force reduces and the centrifugal ball rolls inwards, leading the support leg of the lower braking disc to fall back and the lower braking disc to descend, thus canceling the brake. Then a process of 'brake-speed reducing-speed increasing-brake' is formed. By reducing the rev of the generator to the rated rev and assuring the generator of normal work with an improved efficiency, the vertical shaft typed windmill centrifugal ball typed braking device combines the hand brake with an auto brake and has the advantages of simple structure, convenient operation and cost saving.

The invention discloses a protection method for lifting device band-brake failure. The method comprises the steps that a feedback signal which characterizes a band-brake state of a band brake is received; whether the feedback signal is normal or not is judged, if yes, a first control signal is output, a zero servo is started, and a load is held by outputting moment of force at zero speed; whether time for starting the zero servo reaches a first preset value or not is judged, if yes, a second control signal is output, the zero servo is stopped, and the load is dropped down at a certain speed; whether a dropping height meets a second preset value or not is judged, if yes, the step of outputting the first control signal is returned, the steps are repeated till it is judged that the loaded dropping height does not meet the second preset value, and control is finished. According to the protection method for the lifting device band-brake failure, weight dropping can be avoided, a weight can be slowly put on a safe position, and excessive impact to damage the weight is avoided. The invention further discloses a protection system for the lifting device band-brake failure.

The invention discloses a centrifugal type three-gear automatic speed changing system for an electric car. The centrifugal type three-gear automatic speed changing system comprises a main speed reducer and a speed changer; the speed changer is provided with an F1 one-way overrunning clutch, a centrifugal clutch, a belt brake, a centrifugal brake and an F2 one-way overrunning clutch which can respectively and automatically control a front-row gear ring, a front-row planet carrier, a front-row sun wheel, a rear-row gear ring, a rear-row planet carrier and a rear-row sun wheel in different gears. Thus, automatic gear shifting of the electric car is achieved, a complex electric control module and a complex hydraulic system are removed, the endurance mileage of the electric car is improved, and the service life of batteries is prolonged. Meanwhile, the main speed reducer and the speed changer are integrally connected, and the speed ratio range is improved. Furthermore, the speed changing system is smooth in gear shifting, compact in structure, high in reliability, light in weight, small in size, low in cost and high in transmitting efficiency.

The invention relates to a vehicle band brake device with a friction power generation function. The vehicle band brake device with the friction power generation function comprises a housing, first friction power generation pieces, a band brake wheel disc, a connecting rod, a brake band, a second first friction power generation piece and an electrode; the band brake wheel disc is mounted within thehousing; a plurality of first friction power generation pieces are fixed on the band brake wheel disc at intervals; the connecting rod is shaped like L; the middle corner of the connecting rod is hinged with the housing; one end of the connecting rod is connected with a braking device outside the housing; the other end of the connecting rod is connected with the brake band; the other end of the brake band is fixed on the housing so that the brake band surrounds the outer circle of the band brake wheel disc; the second first friction power generation piece and the electrode are mounted on thesurface of the brake band; and the first second first friction power generation pieces, the second second first friction power generation piece and the electrode form a rotary friction power generation single-electrode system. The vehicle band brake device with the friction power generation function has the advantages that the structure of the original band brake device is integrally kept, the mounting is easy, the cost is low, and the decelerating and braking energy of a vehicle can be effectively converted into electric energy to be recycled because a friction power generation system is integrated.

The invention discloses a detecting method for realizing band brake running of a motor. The method can compare the torquemoment checked in the process of checking motor running with the torquemoment in the process of system normal running, and generates fault codes when the torquemoment in the process of system is bigger than the normal value in a certain range. Two grade fault codes are set according to the seriousness of band brake running: indicative fault codes generated by slight contracting brake and system stop fault codes generated by serious contracting brake. The technical proposal can be used for preventing motor current from losing control caused by contracting brake, friction, etc., which can cause the occurrence of the situations such as safety accidents, component damage, etc. At the same time, the detecting method is convenient for site workers to diagnose the faults such as contracting brake, etc.

The invention discloses a two-stage gearbox of an electric vehicle. The two-stage gearbox comprises a first planet gear group, a second planet gear group, an inner gear ring, a first planet carrier, a second planet carrier, a first sun gear and a second sun gear, wherein the first planet gear group is mounted on the first planet carrier; the second planet gear group is mounted on the second planet carrier; the first planet gear group, the first sun gear and the inner gear ring are matched to form a first planet gear system structure; the first sun gear is positioned on the inner side of the first planet gear group; the inner gear ring is positioned on the outer side of the first planet gear group; the second planet gear group, the second sun gear and the inner gear ring are marched to form a second planet gear system structure; the second sun gear wheel is positioned on the inner side of the second planet gear group; the inner gear ring is positioned on the outer side of the second planet gear group; an outer gear ring is connected with a belt brake; and the center shafts of the sun gears are connected with a disc brake. The two-stage gearbox has the advantages that the transmission ratio can be changed by controlling the brakes which are positioned on both the sun gears and the outer gear ring, so as to achieve two-stage speed change.

The invention relates to a space rocket body rolling apparatus, comprising: at least two traveling rolling mechanisms available for height adjusting and used for driving a rocket body to axially roll,wherein the traveling rolling mechanisms are arranged at the lower end of the rocket body, and at least one of the traveling rolling mechanisms is provided with a side adjusting mechanism for adjusting the axis of the rocket body; rolling rings cooperating with flanges of the rocket body and supported on the traveling rolling mechanisms; a control cabinet connected with the traveling rolling mechanisms and controlling at least one traveling rolling mechanism to operate. The problem that a traditional rocket body has uncontrollable rolling angle or cannot roll is solved; a motor with a band brake is used to control rollers to rotate or stop, rolling linear speed and angle of a barrel and a rocket body can be controlled precisely, and transmission is more stable; a single drive mode and a multi-drive mode can be freely switched according to the length and weight of the barrel; the space rocket body rolling apparatus is safe and reliable to use, simple and convenient to operate, low in time and manpower consumption, and high in automation level.

The invention discloses an assembling production line of vacuum boosters. The assembling production line comprises a conveying belt 102 driven by a transmission mechanism 101. The transmission mechanism 101 comprises a lifting device. A vacuum booster plunger valve and feedback plate gap detecting device 103, a vacuum booster feedback plate and front shell part assembling device 104, a vacuum booster performance detecting device 105, a vacuum booster front-rear shell closing-up device 106, a vacuum booster ejector rod head adjusting and press fitting device 107, a vacuum booster and brake main cylinder combining device 108 and a vacuum booster band brake main cylinder assembly detecting device 109 are sequentially disposed on one side of the conveying belt 102. The assembling production line of the vacuum boosters has the advantages that assembling and online detecting of the vacuum boosters can be achieved, labor is saved, and production efficiency is increased.

The invention discloses a clearance equalizing device of a belt brake. The clearance equalizing device comprises a brake belt, a brake wheel, clearance adjusters and a mounting support. A mounting support is mounted around the brake belt, and the clearance adjusters are sequentially added on the brake belt from a fixed end to a movable end and are fixed on the mounting support. The invention further discloses a mounting and adjusting method by means of the clearance equalizing device of the belt brake. By adjusting the clearance equalizing device, the brake belt can be limited from opening too large clearance, the brake belt can have a certain opening clearance and normal use of the belt brake is ensured. Without welding and cutting the brake belt and the like, the mounting and adjusting method has no influence on the integral performance of the belt brake and is applicable to mounting and use of various belt brakes.

The invention discloses a winch emergency release device and a control method thereof, and belongs to the technical field of winch safety. The winch emergency release device comprises a belt brake, aclutch, an electromagnetic brake and a control system; the control system comprises a belt brake oil cylinder for controlling the belt brake, a clutch oil cylinder for controlling the clutch, a belt brake electromagnetic valve, a clutch electromagnetic valve, a hydraulic pump, an oil tank, an energy accumulator, a control box and an emergency power supply; the hydraulic pump respectively communicates with the oil tank, the energy accumulator, an oil inlet of the belt brake electromagnetic valve and an oil inlet of the clutch electromagnetic valve; an oil outlet of the belt brake electromagnetic valve communicates with a cylinder block of the belt brake oil cylinder; an oil outlet of the clutch electromagnetic valve communicates with a cylinder block of the clutch oil cylinder; and the emergency power supply and a ship power supply system supply electricity to the electromagnetic brake, the belt brake electromagnetic valve and the clutch electromagnetic valve through the control box. The winch emergency release device can realize the emergency release function.

A transmission apparatus can perform a shift operation quickly without generating tooth contact and gear noise when shifting to a nonsynchronized gear train. The apparatus includes a first clutch; a first and a second input shaft; an output shaft; a planetary gear mechanism having a first and a second planetary gear train, a band brake and a direct clutch; a selection type gear train unit having a nonsynchronized gear train; a second rotation speed detector for detecting the rotation speed of the second input shaft as a second rotation speed; actuators; and a gear shift control part for controlling the actuators. When a request for shift to the nonsynchronized gear train is generated, the first clutch is released, the band brake is tightened, and the direct clutch is connected to reduce the second rotation speed. When the second rotation speed becomes equal to or less than a predetermined speed, a gear shift is executed.

The invention relates to a double-layer planet gear train speed changer. The speed changer utilizes the motion combination of a hydraulic or electronic-controlled wet type multi-gear clutch and a bandbrake to synthesize the motive power and rotation speed of an input shaft through a double-layer planet gear train and then output the synthesized motive power and rotation speed from an output shaftso as to make the speed changer have 10 forward gears and one reverse gear. The speed changer is easy to automatically control, can achieve the effect of stepless speed change, and improves economy and dynamic properties of vehicles.

In a friction belt brake with a rotary cylinder (1), which is wound around at least a part of its circumference by a friction belt (2), and with a support (3) for the friction belt, which in a first braking position, can be pivoted around a first axis (9; 25) and two securing points (10, 11) for respectively opposite end sections of the friction belt, wherein a first of the two securing points has a longer lever arm (a) in relation to the first axis than the second securing point (11), the provision is made that in a second braking position, the support (3) can be pivoted around a second axis with regard to which the second securing point has a longer lever arm than the first.

A vehicle driving apparatus where brake and acceleration functions are combined with a single stick includes: a lever moving to an acceleration position, an idle position, or a brake position as rotating forward and rearward about a shaft fixed to a vehicle body at a predetermined angle; a hand acceleration means opening an engine throttle to cause a vehicle to be accelerated; a hand brake means pushing a booster rod of a brake booster so that a brake operates to cause the vehicle to be stopped; a guide means installed on the left and right sides of the lever to prevent the lever from being shaken leftward and rightward; a hand brake locking means allowing the hand brake to be continuously applied; and a cruise control means allowing the lever to stay in the acceleration position even if the driver takes his hand off the lever.