33results about How to "Soft braking" patented technology

The motor vehicle hub driver belongs to the field of hub driver technology, and solves the technological problem of providing flexibly connected hub driver. The motor vehicle hub driver includes a driving shaft, a chain wheel on the driving shaft, an auto-controlled clutch between the left section of the chain wheel and the middle section of the driving shaft, and a controlling clutch between the right section of the driving shaft and the right section of the chain wheel. The auto-controlled clutch has rotor on the driving shaft and wedge between the rotor and the chain wheel. The controlling clutch has its input end connected to the driving shaft and the output end connected to the chain wheel. The present invention can realize sliding and backward braking.

The invention discloses a ceramic-based friction material and a method for preparing the same. The ceramic-based friction material consists of the following raw materials in part by weight: 6 to 8 parts of thermal plasticity phenolic resin or modifier thereof, 7 to 8 parts of potassium titanate whisker, 5 to 6 parts of attapulgite clay, 3 to 4 parts of expanded vermiculite, 4 to 5 parts of butyronitrile rubber powder, 4 to 5 parts of chromite powder, 12 to 13 parts of ceramic fiber, 3 to 4 parts of powdered coke, 14 to 15 parts of barium sulfate, 5 to 6 parts of artificial graphite, 9 to 10 parts of scale graphite, 7 to 8 parts of organic rubbing powder, 3 to 4 parts of sericite, 0.5 to 1 part of aluminum oxide, 3 to 4 parts of copper fiber, 3 to 4 parts of coloring agent and 0.5 to 1 part of organic fiber. The preparation method comprises the following steps of: material blending, cold press moulding, hot press moulding, polishing and curing treatment. The ceramic-based friction material has the advantages of high and stable frictional property, suitable frictional coefficient, low wear rate, low hardness, no damage to friction coupling materials, low braking noise, and extremelylow environmental pollution; and in use, the ceramic-based friction material has the advantages of smooth braking, gentleness, comfortability, safety and reliability.

The invention relates to an automotive disc ceramic brake without heavy metal, heavy metal sulfide or heavy metal fluoride. The automotive disc ceramic brake is prepared from the following components in parts by weight: 9-16 parts of barium sulfate, 1-5 parts of high-lead alumina powder, 5-15 parts of garnet powder, 3-8 parts of palygorskite powder, 1-5 parts of magnesium oxide powder, 1-6 parts of diatomite powder, 3-9 parts of mica powder, 3-6 parts of talcum powder, 1-6 parts of white carbon black, 3-6 parts of aluminum hydroxide, 6-10 parts of calcium hydroxide, 1-3 parts of zinc borate, 3-7 parts of friction particles, 6-10 parts of vermiculite powder, 1-4 parts of tire powder, 5-12 parts of nitrile modified resin, 2-8 parts of nitrile gelatine powder, 2-4 parts of rigid cellulose fiber, 5-8 parts of natural organic fiber, 4-8 parts of mineral fiber, 10-15 parts of ceramic fiber and 8-15 parts of friction powder. The raw materials are mixed, baked and formed to obtain the brake. The automotive disc ceramic brake without heavy metal, heavy metal sulfide or heavy metal fluoride has good friction performance and is environment-friendly and harmless to human health.

The invention relates to a brake device used for an engineering vehicle driving bridge, in particular to a wet-typed multi-sheet brake which is used on the engineering vehicle driving bridge; the brake device mainly comprises a motor end cover, a piston, a large friction plate, an auxiliary friction device, a main friction device and a planetary gear reducer; the motor end cover is axially provided with the piston; the main friction device and the auxiliary friction device are matched with each other; the motor end cover is fixedly connected with the planetary gear reducer; the piston is internally sleeved by a first pressing disc; a second pressing disc and the large friction plate are embedded inside the planetary gear reducer by the tooth tip which is arranged on the external circumference thereof; the fixed disc is axially fixed inside the internal tooth ring of the planetary gear reducer. The brake device of the invention integrates a running brake system and a stopping brake system and has simple, safe and reliable structure; the auxiliary friction device brakes firstly and drives the main friction device to brake subsequently; the braking is carried out from interior to the exterior, the braking force changes from small force to large force; the braking is stable and soft.

The invention provides a loader walking and braking energy recovery auxiliary driving device and a control method. The walking and braking energy recovery auxiliary driving device comprises a controller, a signal monitoring module, a hydraulic auxiliary driving module and a brake module. The hydraulic auxiliary driving module comprises a pump/ motor, a three-way flow valve, a small-size accumulator, a large-scale accumulator, an overflow valve 1 and an overflow valve 2. The control method comprises a pump/ motor control step and a three-way flow valve control step. Through a three-way proportional control valve, torque impact on the pump/ motor is effectively eliminated, so that a loader is allowed to be more smooth and stable in the driving and brake process, the vehicle control performance can be improved; meanwhile, the three-way flow valve is higher in integration level; and compared with two or more switch valves, fault points are reduced, and the device cost is reduced.

The invention provides an automatic blank cutter for rigid plastic, which mainly consists of a plurality of parts of a rack, a blank cutting steel wire rack track frame, a main transmission device, a blank transporting platform, a blank cutting steel wire rack and a blank cutting steel wire rack traction device. A pneumatic clutch which can be frequently started and braked is adopted as a speed reducer of the main transmission device; after the blank cutting steel wire rack with a double-steel wire blank cutting station is adopted, the blank cutting steel wire rack blank cutting stations can be automatically changed when a blank cutting steel wire is broken; the blank transporting platform adopts a stroke-adjustable air cylinder, so that the lifting height of a roller support can be conveniently controlled; the rack of the blank cutter is wholly welded by hollow square steel, so that the blank cutter is very good in stability and rigidity, and the cutting requirement of a rigid plastic extrusion molding blank body can be met; and due to the use of a linear guide rail pair, the moving precision and the moving stability of the blank body can be improved. The automatic blank cutter for the for rigid plastic is simple in structure, stable to run, reliable in performance, high in automaticity, and suitable for cutting the large-batch rigid plastic extrusion molding mud stripes.

The invention discloses a cam type brake mechanism, which comprises a rack, a brake wheel, a rotating shaft, a cam and a steel plate spring. The brake wheel is hinged with the rack. The rotating shaft is connected with a shaft sleeve. The cam is hinged between the rotating shaft and the inner wall of the brake wheel. One end of the cam is a sliding end, and the other end of the cam is a brake end. The outline radius of the brake end is more than or equal to a distance between the rotating center of the cam and the inner wall of the brake wheel, and the outline radius of the other end is less than or equal to the distance between the rotating center of the cam and the inner wall of the brake wheel. The steel plate spring is arranged at the brake end of the cam, and is connected with the shaft sleeve. According to the cam type brake mechanism, the shortcomings of poor brake effects, long brake time and the like are overcome.

The invention provides a driving assistance system and a brake control unit and a brake control method thereof. A brake control unit (130) according to the present invention includes: an acquisition module (131) configured to acquire driving states of a preceding vehicle and a host vehicle during a climbing period, with the driving states including at least speeds of the preceding vehicle and thehost vehicle and a distance between the preceding vehicle and the host vehicle; a processing module (132) configured to determine whether or not a driving assistance system (100) of the vehicle needsto perform braking on the vehicle based on the acquired driving state, when the vehicle is judged to be braked, acquire the target deceleration of the vehicle, calculate a first braking force item according to the target deceleration, and calculate a second braking force item according to the slope value of the road where the vehicle is located; and a braking force determining module (133) configured to determine a target braking force required by the driving assistance system (100) to brake the vehicle according to the first braking force item and the second braking force item.

The invention discloses a magnetorheological brake for a vehicle. The magnetorheological brake comprises a brake disc and a brake gate, wherein the brake disc comprises a brake connecting shaft (1), abrake left disc (2), a magnetic-conducting ventilating connecting column group (8), and a magnetorheological fluid shell body (9), a brake right disc (12) and a magnetorheological fluid brake disc (10) which are fixedly connected in sequence; and the brake gate comprises an outer piston (4), a magnetic field generating device (5), an inner piston (6) and a friction liner (7) which are connected in sequence. The magnetorheological brake disclosed by the invention has the magnetorheological fluid brake and mechanical-friction composite brake functions, and the brake capability is strong; the magnetorheological fluid brake function can be achieved in an instant when the pistons of the brake gate move, the response speed is high, the idle brake stroke is avoided, and the safety is high; the magnetorheological fluid brake power flexibility is controllable, the impact is small, and the degree of comfort is high; and the vehicle brake safety, reliability and comfort can be effectively improved.

The invention discloses an agricultural vehicle four-wheel brake device which comprises a frame, front wheels, back wheels and a brake system. The brake system comprises a brake master pump, a brake foot bar, brake drums and a pipeline system, the brake master pump and the brake foot bar are installed on the frame, and the brake foot bar is connected with the brake master pump through a brake push rod. The brake drums are fixedly installed on the two front wheels and the two back wheels respectively, and the four brake drums are respectively connected with the brake master pump through the pipeline system. Brake pads and brake auxiliary pumps are installed in the brake drums, the brake pads are connected with the brake auxiliary pumps through sliding blocks, and the brake auxiliary pumps are connected with the brake master pump through the pipeline system. The agricultural vehicle four-wheel brake device is improved by an original gear brake mode of a 91 chassis, a four-wheel drum brake is achieved, braking is safe and stable, and the agricultural vehicle four-wheel brake device is better suitable for rural areas complex in road condition. The agricultural vehicle four-wheel brake device is simple in structure, soft in braking, safe and reliable.

The invention is an engine hub driver, belonging to the technical field of hub drivers, providing a flexible connected driver, compriisng hub, drive shaft, auto-controlled clutch and controlled clutch, where the drive shaft is arranged in the hub, the auto-controlled clutch is arranged between the left segments of the hub and drive shaft, and the controlled clutch is arranged between their right segments; a spider of the auto-controlled clutch is arranged on the drive shaft, the roller is arranged between the spider and the hub, when the speed of the spider is higher than that of the hub, the drive shaft drives the hub through the spider, and when the speed of the hub is higher than that of the spider, the hub exceeds the drive shaft to rotate; the input end of the controlled clutch is connected with the hub and the output end of the controlled clutch is connected with the drive shaft, and ordinarily, the controlled clutch is separated from the hub and the drive shaft but jointed with them by control so that the hub can be driven by the drive shaft to reversely drag the engine.

The flexible and controllable hub driving device of motorcycle belongs to the technical field of hub driving device. The resolved technical problem is to provide a flexible driving device. The project for resolving the problem contains hub, driving axis, self-control clutch, chain pulley seat, chain pulley, control clutch and its control device. The chain pulley locates on the right section of the chain pulley seat. The self-control clutch sets between the left section of driving axis and the left section of chain pulley seat. When the rotate speed of the chain pulley seat is larger than that of the driving axis, the chain pulley seat drives the driving axis rotating. When the rotate speed of the chain pulley seat is smaller than that of the driving axis, the driving axis exceeds the chain pulley seat for rotating. The control clutch equips between the right section of the driving axis and the right section of the chain pulley seat. Its input ends links the driving axis and output end links the chain pulley seat. It always separates but combines when controlling. Its control device locates on the right end of the control clutch. Its output end contacts the control clutch and input end links the manual or foot control operation device.

The invention relates to a low-copper asbestos-free organic friction material. The low-copper asbestos-free organic friction material is prepared from the following components in parts by weight: 10-15 parts of a binding material, 45-55 parts of a filling material, 20-30 parts of a fiber material, 2-4 parts of an acidity-alkalinity adjusting material and 5-15 parts of metal fiber or metal powder, wherein the fiber material contains nano boron fiber or basalt fiber; the metal fiber or the metal powder is selected from one or combination of more of titanium, aluminum, heat-resistant hard aluminum, red copper and brass; and the content of copper is less than 5%. According to the formula of the friction material, consumption of red copper and brass is reduced; the strictly-selected and added metal components comprise titanium, aluminum and heat-resistant hard aluminum; the organic fiber contains nano boron fiber or basalt fiber, so that the impact toughness of the product is improved; the stable friction coefficient of the friction material is maintained; the braking process is gentle, stable and comfortable; the defect of unstable friction coefficient of the commercially available high-copper organic friction material under the high-speed and low-temperature condition can also be overcome; and the friction pair aggression can be effectively reduced.

The invention discloses a three-bridge relay valve. The three-bridge relay valve comprises a valve cover and a valve body in tight connection with the valve cover, wherein a control hole is formed inthe valve cover, an air supply hole, a braking air inlet, six braking air outlets and a braking air exhausting hole are formed in the valve body, and a braking piston is mounted in the valve piston; abraking air cavity is communicated with the braking air outlets; a heavy braking variable-pressure adjustment valve and a light braking variable-pressure adjustment valve are arranged on one side ofthe valve body, an air inlet of the heavy braking variable-pressure adjustment valve is communicated with the braking air outlets, an air outlet of the heavy braking variable-pressure adjustment valveis communicated with an air inlet of the light braking variable-pressure adjustment valve, and an air outlet of the light braking variable-pressure adjustment valve is communicated with a buffer aircavity through a third pipeline. According to the three-bridge relay valve, the flexible and smooth braking can be realized when a vehicle is light or the road condition is simple, and the braking sensitivity is high when the vehicle is heavy or the road condition is complex, so that the three-bridge relay valve can meet the braking requirements of different loads or road conditions.

A vehicle controller relates to the technical field of vehicle control, and especially relates to a vehicle controller. The invention provides a vehicle controller which is simple to operate and high in reliability. The vehicle controller comprises an MCU, a distance metering part, a power part, a speed control part, a forward and reverse rotation control part, a braking/brake control part, an input keyboard, an LCD display part, a reset circuit, and a clock circuit, and is structurally characterized in that the MCU is connected with the distance metering part, the power part, the input keyboard, the LCD display part, the reset circuit, the clock circuit and a motor, and the speed control part, the forward and reverse rotation control part and the braking/brake control part are connected with the motor.

The invention provides a spring type self-decelerating valve protecting device. The device comprises a spring module, a blade module, a sliding rail plate and a pipeline module; the spring module comprises a casing, a spring and a rotating shaft; the blade module comprises a connecting rod and an impeller; strip-shaped grooves are formed in the sliding rail plate; a round cake-shaped pipeline is designed on the pipeline module and includes an upper layer and a lower layer; and pipeline openings are designed in the upper layer and the lower layer of the round cake-shaped pipeline respectively.By the aid of the device, the flow speed of a fluid inside the pipeline can be reduced, so that the stress required during opening and closing of a valve is reduced; and meanwhile, the acting force isabsorbed by the aid of the elastic structure of the spring device, so that the buffer protection effect is realized for the device.

Disclosed is a disc brake assembly for rotational direction-dependent applying a predetermined braking torque for braking a shaft (1) having a first brake disc (2) and with at least one associated first friction surface (3) in a brake actuator (4) for applying a desired braking torque operative connection can be brought, at least a second brake disc (5) and at least a second friction surface (6) are provided, wherein the on the second brake disc (5) transferable braking torque is dependent on the direction of rotation transmitted to the shaft (1).

The invention discloses a novel hybrid brake control system which comprises a remote control brake module, an induction brake module, a mechanical brake module, a brake motor module, a drive motor module, a drive wheel module and a clutch module. The remote control brake module is electrically connected with the brake motor module and the drive motor module. The induction brake module is electrically connected with the brake motor module and the drive motor module. A brake device is arranged on the driving wheel module, and the mechanical brake module is connected with the driving wheel modulethrough the brake device; the driving motor module is connected with the driving wheel module through the clutch module; the brake motor module is connected with the driving wheel module through thebrake device. According to the technical scheme, through a hybrid braking structure with three different braking modes of induction braking, remote control braking and mechanical braking, the mechanical automation degree of pavement operation is improved, and the driving safety is improved.

The invention belongs to the technical field of friction sheets, and relates to a high-performance ceramic friction sheet and a production process thereof. The high-performance ceramic friction sheet consists of the following substances in parts by weight of: 60 to 68 parts of copper, 10 to 15 parts of ferrum, 2 to 5 parts of tin, 5 to 10 parts of silica, 3 to 8 parts of molybdenum disulfide, 5 to 10 parts of calcium aluminate, 5 to 13 parts of graphite and 0.5 to 1.5 parts of kerosene. The production process of the friction sheet comprises the following steps of: mixing materials; pressing and forming; and sintering and detecting under a dry working environment. The high-performance ceramic friction sheet has the beneficial effects of high friction performance, high compression strength and low abrasion rate; and when the high-performance ceramic friction sheet is used, the number of produced gas and the number of produced powder are small, the environment pollution is low, and the high-performance ceramic friction sheet brakes steadily, softly, safely and reliably.