186results about How to "Small braking force" patented technology

A collision probability index value corresponding to a probability of collision between a host vehicle and an obstacle is calculated based on the information indicating the relative relationship between the host vehicle and the obstacle; and the alarming braking operation is performed to cause a driver to recognize that a collision may occur by changing at least one of the drive power and the braking force when the collision probability index value reaches a predetermined threshold value. In the alarming braking operation, a target acceleration that is used as a target value in the alarming braking operation is set based on the acceleration of the host vehicle, which is detected when the collision probability index value reaches the predetermined threshold value; and at least one of the drive power and the braking force is controlled so that the target acceleration is achieved.

The invention discloses a ramp starting control method for a vehicle. The ramp starting control method includes steps of S1, detecting rotation speeds and rotation directions of wheels of the vehicle; S2, computing acceleration of the vehicle according to the rotation speeds of the wheels when the wheels rotate anticlockwise; S3, computing sliding force of the vehicle according to the acceleration and the weight of the vehicle and controlling braking of the vehicle according to the sliding force; S4, reducing the braking pressure of the vehicle at a preset rate when increase of an opening of an accelerator of the vehicle is detected. The ramp starting control method for the vehicle has the advantages that braking force can be reduced according to change of the opening of the accelerator of the vehicle when the vehicle is started on a ramp, so that the vehicle can be started smoothly, the vehicle starting smoothness is improved, and the driving safety is guaranteed. The invention further discloses the vehicle and a ramp starting control device for the vehicle.

Provided is a brake cylinder device which can prevent unintentional loosening of a brake force of a spring brake means due to disengagement between engagement portions of a clutch mechanism. The brake cylinder device (1) includes: a normal brake means (11) having a first piston (24); a spring brake means (12) having a second piston (27); a clutch mechanism (14); a spindle (15); and a spindle holding means (16). The spindle (15) is coupled to the first piston (24) so as to be rotatable around the axial direction. The clutch mechanism (14) is rotatably supported by the second piston (27) and has a nut member (33) screwed to the spindle (15) so as to make a connection or a disconnection between the spindle (15) and the second piston (27). The spindle holding means (16) regulates the rotation-enabled angle of the spindle (15) and holds the spindle (15) against the first piston while urging the spindle (15) in the direction opposite to the rotation direction for screw-in of the nut member (33) to the spindle (15).

The present invention concerns a tape magazine especially for a hand-held device for analysing a body fluid with a test tape that can be unwound from a storage unit and wound onto a waste unit where the waste unit can be driven in order to wind forward the test tape. The invention provides that a lock which keeps the test tape under tension is integrated in the tape magazine at least on the storage unit. The present invention also concerns a hand-held device with such a tape magazine. The present invention also concerns a hand-held device with a mechanical drive for the test tape and a disposable hand-held device with polymer-based electronic components.

In an elevator apparatus, a brake control device has a first brake control portion, a second brake control portion, and a third brake control portion. The first brake control portion operates a hoisting machine brake to stop a ascending / descending body as an emergency measure when an abnormality is detected. The second brake control portion reduces a braking force of the hoisting machine brake when a deceleration of the ascending / descending body becomes equal to or higher than a predetermined value during an emergency braking operation of the hoisting machine brake. The third brake control portion monitors a slip speed of a main rope with respect to a drive sheave during emergency braking operation of the hoisting machine brake, and reduces a braking force of the hoisting machine brake when the slip speed of the main rope becomes equal to or higher than a predetermined value.

The invention belongs to the technical field of wind power generation control and discloses a static liquid energy storage hydraulic transmission type wind power generation set in order to solve the problems that in the actual operation process, existing wind power generation sets are unstable in power generation power due to unstable wind speed and are complicated in equipment structure during speed changing through a gear box structure. The wind power generation set comprises a main circulating system, a ground oil supplementing system, an energy storage system, a main oil tank, a first stop valve, a wind wheel and a generator, wherein the main circulating system comprises a hydraulic pump connected with the wind wheel, and a variable motor connected with the generator. According to the static liquid energy storage hydraulic transmission type wind power generation set, power fluctuation caused by wind speed change can be restrained; and in addition, the swing angle of the variable motor is adjusted according to the rotating speed of the wind wheel, thus, the output rotating speed of the variable motor is controlled, the rotating speed of the generator is stabilized, tends to the power frequency rotating speed and reaches the deviation range required by the grid-connected frequency, and grid-connected power generation is achieved more easily.

An electric-powered vehicle includes electric-powered drivers for driving wheels, a controller for controlling the electric-powered drivers to generate an assisting driving force in accordance with a vehicle operating force by an operator, and a brake-operation unit for applying braking forces on the wheels. The vehicle also includes a brake-operation detector for detecting a brake operation performed by the brake-operation unit. When the brake-operation detector detects the brake operation, the controller controls the drivers to reduce the assisting driving force. This structure solves a problem caused by simultaneous generation of the braking forces and the assisting driving force.

The invention relates to a pneumatic-electric braking system for a goods train. An air brake system is additionally provided with a pneumatic power generating module and an electric control dynamic adjustment module, wherein the air brake system is suitable for conventional goods trains and is composed of a train pipe, a 120# distribution valve, a braking cylinder, an auxiliary air cylinder, an acceleration relief air cylinder and a mechanical empty and heavy vehicle adjusting assembly, and the mechanical empty and heavy vehicle adjusting assembly is composed of a mechanical proportional valve, a weight measuring mechanism and a pressure reduction air cylinder; the pneumatic power generating module is composed of an air storage cylinder assembly, a pneumatic power generator and a storage battery unit, and the storage battery unit comprises a storage battery and a management system; the electric control dynamic adjustment module is composed of a brake electronic control unit, a switching electromagnetic valve, a proportional electromagnetic valve, a relay valve and sensors; and the pneumatic power generating module is used for supplying power to the electric control dynamic adjustment module, and pneumatic-electric braking is finally achieved. Compared with the prior art, the pneumatic-electric braking system for the goods train can meet the requirement for precise control over braking under no-load or heavy-load conditions and has the advantages of skid resistance and high sensitivity.

A braking apparatus (6, 7, 8, 12, 20, 30) for a three-phase brushless motor (2) according to one aspect of the present invention is provided in a motor-driven appliance (100), and includes a switching circuit (12) having six switching elements (Q1, Q2, Q3, Q4, Q5, Q6) and a brake control device (30). The brake control device (30) executes two-phase short-circuit control in braking control in which a braking force is generated in the motor (2). In the two-phase short-circuit control, an on / off state of each of the switching elements (Q1, Q2, Q3, Q4, Q5, Q6) is set in such a manner that two out of three conduction paths constituting one of a positive electrode side conduction path that connects three terminals (U, V, W) of the motor (2) and a positive electrode side of a direct current power source (4) and a negative electrode side conduction path that connects the three terminals (U, V, W) and a negative electrode side of the power source (4) are in a conducting state and other of the three conduction paths is in a non-conducting state.

Disclosed is a compact brake cylinder device which, while avoiding increases in the size of the device, is capable of increasing the braking force outputted from a brake output unit which moves together with a rod. A rod (22) is provided inside of a cylinder body (20) so as to freely move in the advancing and retracting directions of the cylinder shaft direction. A piston (24) partitions a pressure chamber (44) inside of the cylinder body (20), surrounding the circumference of the rod (22), and moves in a linear direction parallel to the movement direction of the rod (22). By supplying a pressure fluid to the pressure chamber (44), the piston (24) resists the biasing force of a biasing spring (23) and moves in the retracting direction relative to the cylinder body (20). At that time, a force-multiplication mechanism (25) converts the linear direction drive force generated by the piston (24) to a rotational direction, moves the rod (22) in the advancing direction, and multiplies the drive force from the piston (24) to act on the rod (22). A brake output unit (21) moves together with the rod (22) in the advancing direction and outputs a braking force.

A taxi brake inhibit system overcomes problems of discontinuities in pedal 'feel' that can occur by use of a taxi brake inhibit system, by adding a new pedal 'feel' logic in which twice the brake force is commanded for a given brake pedal application when taxi brake inhibit is active. The taxi brake inhibit system relies upon two different brake force vs. brake pedal application curves to compensate for the difference in deceleration that is achieved for a given brake pedal application depending upon whether the taxi brake inhibit is active or inactive. Such system effectively eliminates undesirable deceleration bumps, yaw effects and changes in pedal feel during braking. The taxi brake inhibit feature is also shut off to both fore-aft brake pairs if any non-normal taxi brake inhibit condition exists on either fore-aft brake pair.

The invention discloses an eddy current retarder controller. The controller comprises a single chip microcomputer, a signal input module, an indicating lamp, a CAN communication interface, a drive circuit and a current sampling circuit, wherein the signal input module, the indicating lamp, the CAN communication interface, the drive circuit and the current sampling circuit are connected to the single chip microcomputer, the IGBT module of the drive circuit is connected to the single chip microcomputer through a gate circuit U3, the current sampling circuit comprises a sampling resistor R3, a retarder coil group L, an over-current protection circuit U4, a sampling signal conditioning circuit U5 and the like. The eddy current retarder controller is simple in structure, reliable in performance, judges the vehicle load situation, brake demand amount and the like of a vehicle at present by acquiring engine rotation speed, throttle opening degree, vehicle speed, temperature and other information, automatically adjusts output duty ratio of the IGBT module, reduces current of a retarder coil, accordingly automatically decreases output braking force, achieves automatic load adjustment control and ensures running safety.

The invention discloses an electronic parking device and an electronic parking system applying the same, wherein the electronic parking device comprises a shell, a dual-shaft-extension motor, a transmission part and brake stay ropes; the transmission part comprises a first pinion, a second pinion, a spline groove, a first gear wheel, a second gear wheel, an inner screw thread hole, a nut spline section, a nut end cap, a nut, an outer screw thread section, a screw rod spline section, a screw rod end cap and a screw rod, wherein the first pinion and the second pinion are respectively arranged at two ends of a rotary shaft of the dual-shaft-extension motor; the center of each of the first gear wheel and the second gear wheel is provided with the spline groove respectively; the first gear wheel and the second gear wheel are respectively meshed with the first pinion and the second pinion, and at the same time, the transmission ratio of the first pinion and the second pinion is different from the transmission ration of the first gear wheel and the second gear wheel; the nut is sleeved on the first gear wheel; the screw rod is sleeved on the second gear wheel; and the outer screw thread section of the screw rod and the inner screw thread hole of the nut are fit spirally. Compared with the existing electronic parking device, through adopting the dual-shaft-extension motor, parallel gear transmission and screw rod transmission for the electronic parking device provided by the invention, the aims that two brake stay ropes with opposite motion directions are pulled tightly simultaneously and the parking braking force is distributed uniformly are realized.

The invention relates to a brake system (1) of a rail vehicle, having at least one brake actuator (2) comprising at least one brake disk (4) and at least one brake lining (6), which interacts with said brake disk (4), for generating a braking force in response to a braking demand. The invention provides at least one sensor device in order to measure at least one variable which represents jerky sliding motion, arising from the braking demand, between the brake disk (4) and the at least one friction lining (6), and to output a signal dependent on the measured variable to a control device which is designed so as to adapt the braking force generated by the brake actuator (2) as a function of a deviation of the measured variable from a predefined value or value range of the variable.

In an elevator device, brake is controlled by a brake control device. The brake control device can perform brake force reduction control for reducing brake force in emergency braking of an elevator car. Also, in the emergency braking of the car, the brake control device monitors traveling conditions of the car and switches over between effectiveness and ineffectiveness of brake force reduction control so that the car stops in a preset allowable stop distance.

A linear motor has an armature; a moving member movable relatively to the armature; first and second magnetic pole tooth trains each having magnetic pole teeth magnetically coupled to one of two magnetic poles of the moving element, the first and second magnetic pole tooth trains being separated from each other in a direction substantially perpendicular to a moving direction of the moving member; and third and fourth magnetic pole tooth trains each having magnetic pole teeth magnetically coupled to the other of the two magnetic poles of the moving element, the third and fourth magnetic pole tooth trains being separated from each other in a direction substantially perpendicular to a moving direction of the moving member and the moving member being arranged between the first and second magnetic pole tooth trains and the third and fourth magnetic pole tooth trains.

A automatic washer deceleration clutch, includes: input shaft;dewater shaft nesting wash shaft; output of input shaft outputs to wash shaft by reduction gears,and input coupling or segregation by clutch and dewater shaft. The key point is that the reduction gears is less gear planetary gear train. The gears can be nested to dewater shaft; the washing reduction gears further include a NGW planetary gear train, which is set out of dewater shaft. This invention revolute the current low-geared mechanism, brake mechanism,and onoff mechanism of clutch, and is of high speed ratio,easy processing and low cost. The invention can keep ordinary washing and dewatering speed, and substitute for helix torsion onoff mechanism for the current tech to improve reliability.

The invention provides an electric-driven steering chassis. The electric-driven steering chassis is capable of guaranteeing the coordinated rotation angles of front and rear vehicle frames, wherein aradius of turning circle is small, realizing the steering and walking of the chassis through a revolving speed difference of left and right vehicle wheels, and improving the stability and a steering response speed of the chassis in a walking process. The electric-driven steering chassis comprises the chassis, the front vehicle frame, the rear vehicle frame, and a controller. Two ends of the frontvehicle frame are provided with left and right front wheels, and two ends of the rear vehicle frame are provided with left and right rear wheels. The left and right front wheels are the front wheels driven by two front hub motors. The controller used for controlling the left and right front hub motors is electrically connected with the front hub motors. The front vehicle frame, the rear vehicle frame and the chassis are rotatably connected by using a vertical front and back axis as a center line. Two ends of a first steering push-pull rod are hinged with a left front connecting base and a right rear connecting base, or hinged with a right front connecting base and a left rear connecting base.

In an elevator device, a brake control device has a first brake control section that, when an abnormality is detected, activates a brake device to emergency stop an elevator car and also has a second brake control device that, when the deceleration of the car is not less than a predetermined level when the first brake control section causes emergency braking operation to activate, reduces braking force of the brake device. The second brake control section detects, independent of the first brake control section, the activation of emergency braking by the brake device.

The present invention discloses a brake device and electric tool containing said brake device. Said brake device includes the following several portions: large gear which is driven by a drive device; eccentric block which is driven by large gear through the agency of a clutch device, said eccentric block can be used for driving tool blade and making it work, the described clutch device includes a brake disk positioned over said large gear, the eccentric block is positioned under the large gear, and coaxially-connected and fixed with said brake disk, and a pair of shifting forks is pin-connected on the brake disk. Besides, said invention also provides the concrete working principle of said brake device and its concrete operation method.

The invention discloses a rail vehicle anti-skid control system and method. The system comprises an electronic brake control unit, a traction control unit, an air brake control unit, an anti-slid valve control unit and a bogie unit, wherein the traction control unit is used for receiving an electric brake reduction signal transmitted from the electronic brake control unit to reduce electric brakeor receive an electric brake switch-off signal to lock an inverter; the air brake control unit is used for receiving a current signal transmitted from the electronic brake control unit to supplement air brake; the anti-skid valve control unit is used for receiving a PWM signal transmitted from the electronic brake control unit to regulate air brake force of gliding wheels; and the bogie unit is used for converting air pressure into brake force, and simultaneously feeding back a wheel rotation frequency signal to the electronic brake control unit. The circumstance that brake force of other wheels are reduced to cause that the brake force is lost excessively can be avoided.

The invention relates to a device for controlling the movement of a second element (20) that is movably arranged with respect to a first element (10), the device comprising the following features: a) an adjustable brake assembly (30) arranged on the second element (20); b) a brake rod (2) communicating with the brake assembly (30) and mechanically coupled thereto, which is also coupled to the first element (10); c) a sensor (40) arranged on the first and / or second element (10, 20); d) an electronic control device (50) for controlling the braking force of the brake assembly (30) onto the brake rod (2) based on signals from the sensor (40). The invention further relates to a method for operating the device.

A movement guiding device having a damping structure different from a conventional damping structure, a table device, and a damping method for the movement guiding device. The movement guiding device comprises a rail member (1) having a rolling element rolling part (1a), a movement member (2) having a loaded rolling element rolling part (2a) facing the rolling element rolling part (1a) and capable of performing a linear or curve movement relative to the rail member (1), and a plurality of rolling elements (3) interposed between the rolling element rolling part (1a) of the rail member (1) and the rolling element rolling part (2a) of the movement member (2). The layer of an oil in contact with the rail member (1) and the movement member (2) is filled in a clearance (16) between the rail member (1) and the movement member (2). A braking force in proportion to a speed is provided to the movement member (2) or the rail member (1) by utilizing the viscosity resistance of the oil.

In an elevator apparatus, a brake control device comprises a first brake controller for operating a braking device to bring a cage to an emergency stop when an abnormality is detected and a second brake controller for reducing braking force of the braking device when the deceleration of the cage reaches a threshold value or more during the emergency braking operation of the first brake controller. The second brake controller includes a first and a second computation unit for performing the operation of reducing the braking force of the braking device by computation processing independently ofeach other, the threshold value is set in the first computation unit so as to vary according to the cage position, and the threshold value is set in the second computation unit in the same manner as in the first computation unit.

An air suspension vehicle load sensing valve system comprises an air storage barrel, a load sensing valve, a suspension air bag, a braking air chamber, an auxiliary air storage barrel and a controller. The air storage barrel communicates with the braking air chamber through the load sensing valve, the auxiliary air storage barrel communicates with the load sensing valve through an electromagneticvalve and a two-way valve sequentially, the suspension air bag communicates with the load sensing valve through the two-way valve and is in signal connection with the controller through an air pressure sensor, and the controller is in signal connection with the electromagnetic valve, a braking signal and a vehicle speed signal. When air leaks from the suspension air bag, the air pressure sensor obtains a low air pressure signal of the suspension air bag and transmits the low air pressure signal to the controller, in combination with the braking signal and the vehicle speed signal, the controller controls the electromagnetic valve to be opened, at the moment, the auxiliary air storage barrel communicates with the load sensing valve through the electromagnetic valve and the two-way valve sequentially and provides the air pressure signal for the load sensing valve so that it can be guaranteed that the braking air pressure output by the air storage barrel to the braking air chamber is nottoo low, and traveling safety is guaranteed. The designed air suspension vehicle load sensing valve system is high in safety, easy and convenient to operate and high in reliability.