41results about How to "Brakes are safe and reliable" patented technology

The invention discloses a dual-redundancy electric brake device of an airplane and a control method for the dual-redundancy electric brake device. A redundant driving controller part receives a brake pressure given signal and drives a brake actuator to work, so that brake pressure applied to a braked wheel follows the brake pressure given signal. By adopting a redundant technology, easily damaged mechanisms in an airplane brake driving device are subjected to warm backup; under the condition of normal working, the corresponding parts work at half of rated power, so that the service life of the driving device is prolonged, and the reliability of the driving device is improved; when certain redundancy of the driving device fails, a fault can be detected in real time and isolated, so that a fault motor quits a working state, and the driving device runs after being switched to a single-channel mode; and therefore, the reliability of a braking system of an airplane is improved.

The invention discloses a redundant driving electric brake of an airplane and a control method for the redundant driving electric brake. A redundant driving controller part receives a brake pressure given signal and drives a brake actuator to work, so that brake pressure applied to a braked wheel follows the brake pressure given signal. By adopting a redundant technology, easily damaged mechanisms in an airplane brake driving device are subjected to warm backup; under the condition of normal working, the corresponding parts work at half of rated power, so that the service life of the driving device is prolonged, and the reliability of the driving device is improved; when certain redundancy of the driving device fails, a failure can be detected in real time and isolated, so that a fault motor quits a working state, and the driving device runs after being switched to a single-channel mode; and therefore, the reliability of a braking system of an airplane is improved.

The invention discloses an emergent brake device for a vehicle; left and right two brake frames are arranged in a brake clamp of the brake device, wherein the brake frames comprise a first cross bar, a first vertical rod, two brake rods and two brake pieces; one end of the first cross bar is fixedly connected to a brake block; the center of the first vertical rod is vertically connected to the other end of the first cross bar; one ends of the two brake rods are fixedly connected to one end of the first vertical rod; the two brake pieces are respectively and correspondingly fixed at the other ends of the two brake rods; and the brake pieces are perpendicular to the corresponding brake rods. Through the arrangement of the brake frames in the emergent brake device for the vehicle, when the vehicle is emergently braked, if one of the brake pieces is failed, the friction brake of the rest brake piece still can be used, the safety of the vehicle is improved; and meanwhile, the use level of brake oil can be decreased, and the energy is saved.

The invention provides an emergency hydraulic system, the emergency hydraulic system comprises a hydraulic control system, the hydraulic control system comprises a hydraulic main system and a hydraulic emergency system, the hydraulic main system comprises a winch, a hydraulic brake, a hydraulic motor, a shuttle valve, a balance valve, a first reversing valve, a second reversing valve, a first ballvalve, an ascending oil way AWA port, a descending oil way AWB port, an oil tank oil port and a brake oil way EMP port, the ascending oil way AWA port is connected with an oil inlet of the balance valve, an oil outlet of the balance valve is connected with one end of the hydraulic motor, the descending oil way AWB port and the brake oil way EMP port are connected with the other end of the hydraulic motor in parallel, an oil return port of the hydraulic motor is connected with the oil tank oil port, the power output end of the hydraulic motor is connected with the winch, the hydraulic brake isconnected with the output end of the hydraulic motor in a clamped mode, the first ball valve is connected between the hydraulic motor and the brake oil way EMP port in a normally-closed mode, and thebalance valve is connected between the hydraulic motor and the ascending oil way AWA port. The emergency hydraulic system has the advantages of safety and stability in emergency operation and sufficient braking force.

The invention relates to an anticlockwise-rotation braking mechanism of an electric bicycle. The inversion braking mechanism mainly comprises a motor, a crank shaft, a crankset and a clutch, wherein the crank shaft is arranged in the motor in a penetrating way and a rotatable manner; the crankset is provided with a sleeve connected with the motor and the crank shaft; the clutch is arranged between the crank shaft and the sleeve of the crankset; when the crank shaft clockwise rotates, the clutch drives the crankset to clockwise rotate under the driving of the crank shaft; when the crank shaft anticlockwise rotates, the clutch and the sleeve rotate relatively under the driving of the crank shaft, and a period of delay time is generated, so that the motor stops supplying assistant power; and then the clutch can drive the crankset to anticlockwise rotate within the delay time, so that a braking effect is achieved.

The invention relates to a brake control method for a motor, in particular to the brake control method for a permanent magnet synchronous motor. The method is applied to a system consisting of an alternating current power supply, a frequency converter, the permanent magnet synchronous motor and a load. The control method comprises the following steps of: (1) determining voltage amplitude and a voltage angle during the braking of the permanent magnet synchronous motor; and (2) controlling the output voltage of the frequency converter based on the determined voltage amplitude and the determined voltage angle, and automatically tracking the maximum braking torque of the permanent magnet synchronous motor on the premise of ensuring that the bus voltage of the frequency converter is constant or tends to be constant to ensure the braking performance of the permanent magnet synchronous motor. The braking of the permanent magnet synchronous motor under normal power supply and power failure conditions is met by adopting the same algorithm at the same time, so the algorithm is simplified.

The invention relates to a casting type polyurethane material inflation-free tire, made of two polyurethane materials with different structures and different hardness. The casting type polyurethane material inflation-free tire comprises a tire body and a settling pit, wherein one side of the tire body is provided with a tire crown layer; the tire crown layer is poured on the outer top periphery ofthe tire body; the tire crown layer is arranged on the outer side of the tire body, and the settling pit is arranged on the outer side of the tire crown layer; as the crown lay of the casting type polyurethane material inflation-free tire is non-foamed, full density polyurethane (or CPU) elastomer material, the structure of tire crown is different from that of tire body, occupying 1 / 3 to 1 / 4 of the cross-sectional area of the top layer of the tire; as the crown non-foamed body and the tire body foamed body are automatically synthesized into an integral body during the casting process, the tire crown is wear-resistant and skid-proof, has small rolling resistance, has hydrolysis resistance, acid resistance, and alkali resistance, and the tire body foam sponge layer functions to achieve theshock-absorbing effect; and the double-layer shock-absorbing effect is close to that of the traditional pneumatic tire.

The invention provides a hydraulic brake valve. The hydraulic brake valve comprises a winch, a hydraulic brake, a hydraulic motor, a shuttle valve, a balance valve, a first reversing valve, a second reversing valve, a first ball valve, a lifting oil way AWA port, a descending oil way AWB port, an oil tank oil way AWL port and a brake oil way EMP port, wherein the lifting oil way AWA port is connected with an oil inlet of the balance valve; an oil outlet of the balance valve is connected with one end of the hydraulic motor; the descending oil way AWB port and the brake oil way EMP port are connected with the other end of the hydraulic motor in parallel; an oil return port of the hydraulic motor is connected with the oil tank oil way AWL port; a power output end of the hydraulic motor is connected with the winch; the hydraulic brake is connected with an output end of the hydraulic motor in a clamping manner; the first ball valve is normally closed and connected between the hydraulic motor and the brake oil way EMP port; the balance valve is connected between the hydraulic motor and the lifting oil way AWA port; a first input end of the shuttle valve is connected with the lifting oilway AWA port; and a second input end of the shuttle valve is connected with the descending oil way AWB port. The hydraulic brake valve has the advantages of high brake safety and sufficient brake force.

The invention provides a reserved emergency braking system of an automobile, which is formed by an oil cylinder and a brake tank body, wherein a buffering roller and a plurality of groups of brake rollers are arranged at the bottom of the brake tank body; the buffering roller is arranged at the front end of the bottom of the brake tank body; the brake tank body is internally provided with a pressure bearing seat and a friction sheet is arranged at the bottom of the pressure bearing seat; a gap is reserved between the friction sheet and the brake rollers; the top of the pressure bearing seat is hinged with a piston rod of the oil cylinder arranged at the bottom of an automobile beam; and the piston rod of the oil cylinder is obliquely placed towards the front side of the automobile. The brake rollers are used for braking and the braking is carried out on rolling bodies; the abrasion caused on a road surface and the automobile is small; meanwhile, the brake rollers are more so that the total grounding area is larger than the grounding area of wheels of the automobile and the braking effect is good; and meanwhile, the brake tank body has a certain length so that the distribution of the brake rollers is a rectangular frame, the brake has the better guiding performance, and the brake is safer.

The invention relates to a light tricycle, the frame of this tricycle includes the main frame comprised of top tube, low tube, head tube, back riser and rear axle connecting device fixed on back end of the main frame, the rear axle connecting device includes leading truck, connection piece assembly and upright fork or bumper shock absorber. Light tricycle frame structure of the invention is simple, which is small, the weight is light, processing is easy , which is convenient for packing and transportation; Light tricycle assembled by this frame is small and exquisite light, which is difficult to turn over the side, travels stable safely, riding is comfortable, the brake is reliable. Use of this invention is extensive, which can use people's power to drive as the general traffic instrument of riding instead of walk, also can be developed into bassinets, recreational vehicles, exercycles, recreational vehicles, tourist coaches, delivery cars etc., when battery, motor or internal-combustion engine is installed, it can further be assembled to light tricycle electric motor car, light tricycle help-move-vehicle, light tricycle motor vehicle and disabled person's car etc.

This invention involves a kind of light tricycle and its frame. This tricycle includes the main frame which consists of upper tube, lower tube, front tube and back erect tube, and the backshaft connecting device which is installed in back end of the main frame. The backshaft connecting device includes an oriented shelf, joining slice assembly and a standing cross or absorber. This light tricycle is of simple structure, small size and less weight and it is easily made and packed and transported. This light tricycle built by the frame, light and small, is rare to turn over, safe and steady to run, comfortable to take and reliable to brake . This invention has a wide range of use, it can be a general walk-replacing tool by adopting manpower drive, it can also develop into a bassinet , recreation car , fitness car , travel car, tourist coach , delivery car ,etc. If it is installed the battery, motor or internal-combustion engine, it can also be changed into a light electronic tricycle,a light assistant tricycle, a light tri-motor vehicle and a car for the disabled, etc.

To provide a device for detecting whether heterogeneous tires are mounted on the respective left and right driving wheels or not and accurately detecting the decreased tire pressures. The detection device of heterogeneous tires of the present invention is equipped with a means for detecting the rotational speeds of wheels mounted on a vehicle, a means for detecting torque applied to driving wheels, and a calculation means for calculating the inclinations of regression straight lines of respective relations from relation between the rotational speed ratio of the front and rear wheels in the left side wheels of the vehicle and torque applied to driving wheels and relation between the rotational speed ratio of the front and rear wheels in the right side wheels of the vehicle and the torque, and detects that heterogeneous tires are mounted on the driving wheels by comparing the inclination of regression straight line of the relation of the left side wheels with the inclination of regression straight line of the relation of the right side wheels. The detection device of the decreased tire pressures of the present invention changes the threshold for judging tire deflation to a threshold in a case of loading heterogeneous tires when it detects that the heterogeneous tires are mounted on the driving wheels.

The invention discloses an electric heat- preservation serving trolley comprising a serving trolley body, the serving trolley body is of a cuboid box structure, a groove is formed in the front side ofthe serving trolley body, a grab rail is fixedly connected to an opening in the upper half portion of the groove, and the middle of the grab rail is connected with a manual control box in a sleeved mode. An electric heating fan and a storage box are arranged on the left side and the right side of the lower half portion of the groove correspondingly, small double-door plates are fixed to the two sides of the lower half portion of the groove in a hinged mode, and a battery box and a controller box are fixedly connected to the two sides of the middle of the bottom face of the serving trolley body through bolts correspondingly. Universal wheels are arranged at the two ends of the front side of the bottom of the serving trolley body. Driving wheels are arranged at the two ends of the rear sideof the bottom face and connected through a differential motor integrated bridge rotating shaft. The electric heat-preservation serving trolley is simple in structure, novel in design, capable of reducing the labor intensity of deliverymen and achieving rapid, convenient, safe and reliable braking.

The invention relates to a sport skateboard with a buffering function. The sport skateboard comprises a board body and rollers arranged on the bottom surface of the board body, wherein the board body comprises a top board, a board core and a bottom board which are sequentially stacked from top to bottom; a plurality of elastic parts are uniformly arranged in the board core and arranged between the top board and the bottom board. According to the sport skateboard with the buffering function, the elastic parts with the buffering function are arranged in the middle part of the board body, vibration during sliding is relieved through deformation of the elastic parts, discomfort to a slider is avoided, long-strip-shaped grooves are formed in the upper surface of the board body, sliding prevention can be realized, compactness of the board body can be increased, rubber sheets are arranged at two ends of the bottom board of the board body, safety brake of the slider can be facilitated, and the board body cannot be damaged in the brake process. The sport skateboard with the buffering function is simple in structure and safe to use.

The invention belongs to an air control brake control method for a dual-control membrane type drilling machine in the technical field of petroleum drilling machine control. Compressed air is output through a manual duplex control valve into two paths of complementary pressure-regulating control air to respectively control a normally closed brake controller and a normally open brake controller, a pressure regulating air signal is amplified to respectively control a normally open brake membrane cylinder and a normally closed brake membrane cylinder, and under the coefficient power, through driving a brake crank shaft and a brake shaft of a winch by respective piston rods of the two cylinders, a brake output shaft, and a coupling, a brake band and a brake hub are enclasped to realize winch barrel braking. The air control brake control method and system has the advantages that the brake torque is large, and the brake torque of a winch is increased by one time through the combined action of the normally open brake membrane cylinder and the normally closed brake membrane cylinder. The braking is safe and reliable, and even if a control part is totally failed, a winch barrel can be firmly braked by a brake spring.

The invention discloses a redundant driving electric brake of an airplane and a control method for the redundant driving electric brake. A redundant driving controller part receives a brake pressure given signal and drives a brake actuator to work, so that brake pressure applied to a braked wheel follows the brake pressure given signal. By adopting a redundant technology, easily damaged mechanisms in an airplane brake driving device are subjected to warm backup; under the condition of normal working, the corresponding parts work at half of rated power, so that the service life of the driving device is prolonged, and the reliability of the driving device is improved; when certain redundancy of the driving device fails, a failure can be detected in real time and isolated, so that a fault motor quits a working state, and the driving device runs after being switched to a single-channel mode; and therefore, the reliability of a braking system of an airplane is improved.

The invention discloses a dual-redundancy electric brake device of an airplane and a control method for the dual-redundancy electric brake device. A redundant driving controller part receives a brake pressure given signal and drives a brake actuator to work, so that brake pressure applied to a braked wheel follows the brake pressure given signal. By adopting a redundant technology, easily damaged mechanisms in an airplane brake driving device are subjected to warm backup; under the condition of normal working, the corresponding parts work at half of rated power, so that the service life of the driving device is prolonged, and the reliability of the driving device is improved; when certain redundancy of the driving device fails, a fault can be detected in real time and isolated, so that a fault motor quits a working state, and the driving device runs after being switched to a single-channel mode; and therefore, the reliability of a braking system of an airplane is improved.

The invention provides an emergency hydraulic system, including a hydraulic control system, the hydraulic control system includes a hydraulic main system and a hydraulic emergency system, the hydraulic main system includes a winch, a hydraulic brake, a hydraulic motor, a shuttle valve, a balance valve, a first reversing valve, the second reversing valve, the first ball valve, the AWA port of the lifting oil circuit, the AWB port of the descending oil circuit, the fuel tank oil port and the EMP port of the brake oil circuit; the AWA port of the lifting oil circuit is connected to the oil inlet port of the balance valve, and the balance The oil outlet of the valve is connected to one end of the hydraulic motor, the AWB port of the descending oil circuit and the EMP port of the brake oil circuit are connected in parallel to the other end of the hydraulic motor, the oil return port of the hydraulic motor is connected to the oil port of the fuel tank, and the power output end of the hydraulic motor is connected to the winch , the hydraulic brake is clamped and connected to the output end of the hydraulic motor, the first ball valve is normally closed and connected between the hydraulic motor and the EMP port of the brake oil circuit, and the balance valve is connected between the hydraulic motor and the AWA port of the lifting oil circuit. The invention has the advantages of safe and stable emergency operation and sufficient braking force.

The invention discloses an emergent brake device for a vehicle; left and right two brake frames are arranged in a brake clamp of the brake device, wherein the brake frames comprise a first cross bar, a first vertical rod, two brake rods and two brake pieces; one end of the first cross bar is fixedly connected to a brake block; the center of the first vertical rod is vertically connected to the other end of the first cross bar; one ends of the two brake rods are fixedly connected to one end of the first vertical rod; the two brake pieces are respectively and correspondingly fixed at the other ends of the two brake rods; and the brake pieces are perpendicular to the corresponding brake rods. Through the arrangement of the brake frames in the emergent brake device for the vehicle, when the vehicle is emergently braked, if one of the brake pieces is failed, the friction brake of the rest brake piece still can be used, the safety of the vehicle is improved; and meanwhile, the use level of brake oil can be decreased, and the energy is saved.

The present invention relates to the technical field of brakes, in particular to a sleeve-type brake device, which includes a mounting part, a first braking part and a second braking part slidably disposed on the mounting part, and a control part slidably disposed on the mounting part. and the drive adjustment assembly arranged on the control part, the control part includes a first positioning part and a second positioning part, the first positioning part abuts and cooperates with the side of the first brake part away from the second brake part, and the second positioning part It abuts and cooperates with the side of the second brake part away from the first brake part. When the first brake part abuts against the first positioning part and the second brake part abuts against the second positioning part, the first brake part A brake area is formed between the brake part and the second brake part, and the driving adjustment assembly is used to control the first brake part and the second brake part to approach each other. Compared with various traditional brakes, this brake device maintains the advantages of lightness, good hand feeling and labor saving; at the same time, it has a simple structure, easy processing, high reliability and stability in use, easy daily inspection and easy maintenance.

The invention relates to a light tricycle, the frame of this tricycle includes the main frame comprised of top tube, low tube, head tube, back riser and rear axle connecting device fixed on back end of the main frame, the rear axle connecting device includes leading truck, connection piece assembly and upright fork or bumper shock absorber. Light tricycle frame structure of the invention is simple, which is small, the weight is light, processing is easy , which is convenient for packing and transportation; Light tricycle assembled by this frame is small and exquisite light, which is difficult to turn over the side, travels stable safely, riding is comfortable, the brake is reliable. Use of this invention is extensive, which can use people's power to drive as the general traffic instrument of riding instead of walk, also can be developed into bassinets, recreational vehicles, exercycles, recreational vehicles, tourist coaches, delivery cars etc., when battery, motor or internal-combustion engine is installed, it can further be assembled to light tricycle electric motor car, light tricycle help-move-vehicle, light tricycle motor vehicle and disabled person's car etc.