218results about How to "Improve braking effect" patented technology

The invention discloses a punch forming device for producing an automobile engine oil pan, and relates to the technical field of punch forming, and the punch forming device comprises a composite mechanism. According to the punch forming device for production of the automobile engine oil pan, through the design of the composite mechanism, materials are placed in the processing mechanism and conveyed to the composite base through the processing mechanism, then a movable cross beam is controlled through a hydraulic column to enable a pressing module to extrude a bearing module, and therefore the punch forming effect is achieved; the effect of manually laying materials is reduced, potential safety hazards of operators are reduced, the operation environment is optimized, after long-time operation of the bearing module, parts can be seriously abraded, and therefore the stamping precision of follow-up materials is affected, the bearing module can be replaced, and in the process that the pressing module extrudes the materials towards the bearing module, the pressing module can be replaced, and the pressing module can be replaced. And the magazine mechanism contracts to store force, so that after stamping is finished, ejection is performed through the magazine mechanism, the effect of preventing material adhesion is achieved, and the subsequent operation efficiency is prevented from being influenced.

The invention relates to an engine braking stepless regulation method, device and equipment and a medium, and belongs to the technical field of engine braking. The method comprises the steps that a negative torque request and basic driving data sent when a vehicle is braked are obtained, and the required negative torque is determined according to the negative torque request; according to the basic driving data and the required negative torque, the engine braking starting state is determined; when the engine braking starting state is starting, and engine braking of the vehicle does not meet the required negative torque, a pneumatic supercharger is adjusted, and first engine braking torque is obtained; when the first engine braking torque meets the required negative torque, stepless adjustment of engine braking is completed, and the braking effect can be improved through engine braking and adjustment of a pneumatic supercharger; the engine braking torque of the vehicle is controlled according to the required negative torque, continuous and variable torque adjustment can be carried out, and then stepless adjustment of engine braking is achieved.

The invention provides a common-mandrel double-self-driving synchronous control permanent magnet outer rotor lifting device and a control method thereof.The device comprises a mandrel and supporting bases used for supporting the left end and the right end of the mandrel, and the mandrel is provided with a left permanent magnet outer rotor lifting structure and a right permanent magnet outer rotor lifting structure; each permanent magnet outer rotor lifting structure comprises a winding drum, a stator, a permanent magnet, an end cover and a disc brake used for braking the winding drum, the stator is arranged in the winding drum, the winding drum is rotatably connected with the mandrel, the stator comprises a stator iron core support, a stator iron core and a stator winding, the stator iron core support is arranged on the mandrel and provided with the stator iron core, and the stator winding is arranged on the stator iron core support. The stator core adopts a magnetic slot wedge, the stator winding is arranged on the stator core, and the mandrel is provided with a wiring slot for accommodating a stator winding outgoing line; the whole diameter can be reduced, the stability during working is improved, the double-load two-way transportation requirement can be met, the flexibility and adjustability are improved, and the double-load two-way transportation device has the advantages of being few in transmission links, free of a high-speed shaft, high in reliability and low in energy consumption.

The invention discloses a composite braking slip rate control system and method based on a hub motor and an EMB. The method comprises the steps that vehicle information is obtained; calculating a target slip rate according to the vehicle information; according to the target slip rate, calculating a slip rate threshold value for opening and exiting the ABS; according to the vehicle speed, the opening degree of a brake pedal, the actual slip rate and the slip rate threshold value, an ABS start-stop mark is given; according to the vehicle speed, parameters of a slip rate tracking controller are calculated through the attachment coefficient, the slip rate and the slip rate change rate, and then the total target braking torque is calculated; selecting a braking torque distribution mode according to a motion mode switch, gradient and the like, and distributing target braking torque to the hub motor and the EMB; and the hub motor and the EMB execute the target braking torque command, and connection between the inverter and the battery is cut off in time. According to the method, the slip rate can be calculated more finely, the target slip rate and controller parameters are adaptively adjusted according to working conditions, the road adhesion coefficient utilization rate can be effectively improved, and the braking efficiency and stability are improved.

The invention discloses rock core drilling sampling equipment for geological disaster investigation, and relates to the technical field of sampling, and the rock core drilling sampling equipment comprises a composite mechanism. According to the rock core drilling and sampling equipment for geological disaster investigation, through the design of a composite mechanism, the motor is connected with the butt joint block, and the drill rod is inserted into the inner side of the butt joint block, so that drilling and sampling are conducted on rocks, in the drilling process, the movable frame slides on the outer side of the sliding column so as to ascend and descend, and therefore the work requirement is met; a drill bit mechanism is arranged on the outer side of the drill rod, large rocks are crushed through the drill bit mechanism in the drilling process, meanwhile, rock blocks are guided to enter the inner side of the drill rod, so that a sample is taken out when the movable frame body is lifted subsequently, subsequent treatment is facilitated, and after sampling is finished, the drill bit mechanism is used for crushing the large rocks and guiding the rock blocks to enter the drill rod. When the sample is taken out from the inner side of the drill rod, the sample is taken out more cumbersomely and difficultly, the pushing and pressing mechanism is pressed by the electric push rod, so that the effect of discharging the sample is achieved, and normal operation of equipment is kept.

The invention discloses fused quartz plate welding equipment with a positioning effect, and relates to the technical field of welding, and the fused quartz plate welding equipment comprises a composite mechanism. According to the fused quartz plate welding equipment with the positioning effect, through the design of the composite mechanism, the two fixing mechanisms are arranged and distributed on the two sides of the composite base, quartz plates are placed on the inner sides of the fixing mechanisms, and the effect of fixing the plates is achieved through the fixing mechanisms, so that the stability during welding is kept, deviation is prevented, and the welding precision is improved; the fixing mechanisms slide on the outer sides of the sliding rail columns, the two fixing mechanisms move towards one side of the welding machine, the mechanical butt joint effect is achieved, deviation caused by manual butt joint is avoided, the sliding frame body slides on the inner side of the composite frame body, the welding machine is driven to conduct transverse operation, and therefore the plate welding effect is achieved. When laser welding is carried out, dazzling light exists, the light is shielded through the protection mechanism, the working environment is optimized, and the vision of personnel is prevented from being affected.

The invention relates to a wheel device, a vehicle having the wheel device and a method of controlling the wheel device. The wheel device comprises a wheel body, a cover element and a transmission assembly. The wheel body is provided with a plurality of spokes which are arranged at intervals at a preset angle, and a through opening through which air can pass is formed between every two adjacent spokes; the cover element can cover the side face of the wheel body in a rotating mode relative to the wheel body around the rotating axis of the wheel body and is provided with at least one hole opening area. A transmission assembly is disposed between the wheel body and the shroud element and is configured to rotate the shroud element relative to the wheel body about a rotational axis of the wheel body when a rotational speed of the wheel body is greater than a predetermined threshold, therefore, the through opening of the wheel body is converted from an open state in which the through opening overlaps with the orifice area to a blocked state in which the through opening does not overlap with the orifice area. The invention has the advantages of reducing air resistance, increasing endurance mileage or fuel efficiency, and improving cooling performance, braking performance and appearance design.

The utility model discloses a railway parking anti-slip device. The railway parking anti-slip device comprises a joist installed between two stock rails, one side of the joist is in sliding connection with a sliding frame A, the other side of the joist is in sliding connection with a sliding frame B, the end of one side of the sliding frame B is provided with a frame body, and the frame body is connected with the sliding frame A through two parallel screw rods. The ends, penetrating through the front side end plate of the sliding frame A, of the screws are provided with limiting blocking tables, the sides, penetrating through the front side end plate of the frame body, of the screws are provided with nuts, the portions, located between the front side end plate of the sliding frame A and the front side end plate of the frame body, of the screws are sleeved with spring assemblies, an oil cylinder is arranged in the frame body, and the oil cylinder is installed between the two screws through a flange of the oil cylinder. The telescopic end of the oil cylinder faces the front side end plate of the frame body, a cushion block is arranged between the flange and the front side end plate of the frame body, and the flange is tightly pressed on the end face of the cushion block through a nut. The parking device solves the problems that in the prior art, braking force is weak, and the braking effect of the parking device is affected.

The invention relates to a hub motor driving and braking integrated system with a built-in speed reducer and a control method, and belongs to the technical field of electric vehicle braking, the system comprises a motor, a planetary gear speed reducer and a brake, the planetary gear speed reducer comprises a sun gear, a gear, a planet carrier plate and a planet shaft, the sun gear and the gear are integrally formed, the sun gear is of a hollow structure, the sun gear is connected to the motor through a spline, the planet shaft and a wheel bolt are arranged in a staggered mode, and the planet carrier plate is fixedly connected to a wheel bolt fixing plate. The technical problems that in the prior art, a hub motor with a built-in speed reducer is low in internal space utilization rate, poor in heat dissipation effect and large in noise due to insufficient structures and strategies are solved.

The invention discloses tab welding equipment for manufacturing a composite current collector, and relates to the technical field of welding equipment, and the tab welding equipment comprises a composite mechanism. According to the tab welding equipment for manufacturing the composite current collector, through the design of the composite mechanism, materials are placed in the clamping mechanism, so that the effect of fixing the materials is achieved, the materials are prevented from moving or shaking in the welding process, and the influence on the welding effect and the welding precision is avoided; the sliding block drives the welding machine to move on the welding frame body to be attached to materials for laser welding, the positioning mechanism is attached to the surfaces of the materials in the welding process, so that the material welding precision is improved, the welding quality is improved, the welding frame body slides on the surfaces of the connecting rods, and the welding flexibility is improved; the limiting mechanism is used for limiting the moving range of the clamping mechanism, part abrasion caused by excessive sliding is avoided, and the service life of the equipment is prolonged.

The invention provides a hydraulic brake system which comprises an oil can, a brake master cylinder, a pedal simulator, an electric supercharging device, a wheel brake unit, a brake pedal, a control unit and a backflow oil way, the two ends of the backflow oil way are connected with the oil can and a hydraulic cavity of the brake master cylinder respectively, and a backflow valve is arranged on the backflow oil way; the control unit is connected with the return valve and used for controlling opening and closing of the return valve according to the braking efficiency of the vehicle braking device during braking. When the backflow valve is opened, brake fluid in the hydraulic cavity of the brake master cylinder can flow back to the oil can through the backflow oil way. The hydraulic brake system can increase the stroke of the brake pedal when the brake efficiency of the vehicle brake device is attenuated, so that a driver can sense the attenuation of the brake efficiency. The invention further provides a vehicle.

The invention provides a rail train traction and brake control method and system, and the method comprises the steps: firstly monitoring the wheel rotation speed and motor torque of a rail train, inputting a state observer with pole configuration to estimate an adhesion coefficient in real time, and combining the creep speed at the current moment to obtain a traction and brake coefficient; calculating the stick-slip slope of the adhesion characteristic curve by using an adhesion coefficient-creep speed empirical formula; the method comprises the following steps: setting a target creep speed by adopting a steepest gradient method, inputting the target creep speed and a current creep speed into a neural network controller, outputting a rail train correction torque, combining the rail train correction torque with a current actual braking torque to obtain a target torque, and controlling a rail train motor through a DTC method so that the actual torque is consistent with the target torque. And the motor torque and the wheel speed are input into the state observer to form closed-loop control. The adhesion coefficient is estimated and optimized in real time through the control method, the train traction and braking efficiency is remarkably improved, and a safer and more efficient solution is provided for modern rail transit.

The invention provides an engine braking device with returning and limiting functions and an engine, and belongs to the technical field of automobile parts. The brake rocker arm and the rocker arm shaft are matched through a shaft hole, the side portion of the brake rocker arm extends in the horizontal direction to form an abutting platform, a limiting concave part is arranged on the outer surface of the rocker arm shaft, and a limiting convex part is arranged on the brake rocker arm; the rocker arm support is provided with a first connecting part; one end of the return spring support is connected with the first connecting part, the horizontal height of the first connecting part and the horizontal height of the second connecting part are both higher than the horizontal height of the abutting platform, and the horizontal height of the return spring support is lower than the horizontal height of the upper surface of the brake rocker arm; the two ends of the first elastic piece are clamped between the other end of the return spring support and the abutting platform. According to the engine braking device, the size of the whole engine braking device in the vertical direction is reduced, and the structure is more compact.

The invention provides an engine braking device with a return function and an engine, and belongs to the technical field of automobile parts, and the engine braking device comprises a cam shaft, an auxiliary cam, a braking device and a braking device, a brake rocker arm and a rocker arm shaft, wherein a limiting part is arranged on the brake rocker arm; the movable unit comprises a sliding part and a rolling part; the rocker arm support is provided with a first connecting part; one end of the return spring bracket is connected to the first connecting part, and the other end of the return spring bracket is provided with a return spring seat; the elastic piece is transversely arranged and is clamped between the return spring seat and the limiting part; when the engine is braked and the rolling part is in contact with the non-working surface, the distance between the return spring seat and the limiting part is minimum; and when the engine brakes and the rolling part is in contact with the working surface, the distance between the return spring seat and the limiting part is maximum. According to the engine braking device, the elastic piece is transversely arranged, so that the overall size of the whole engine braking device in the vertical direction is integrally reduced.

The utility model relates to the technical field of elevator safety, in particular to an elevator emergency braking device which comprises an elevator body, the two side surfaces of the elevator body are in sliding connection with guide rails, the two side surfaces of the elevator body are fixedly connected with a brake caliper and a fixing base, the two side surfaces of the brake caliper are in sliding connection with wedge blocks, and the surfaces of the wedge blocks are fixedly connected with ceramic pieces. The bottom end of the wedge block is fixedly connected with a limiting column, the surface of the limiting column is sleeved with a rubber sleeve, a round rod is fixed to the surface of the fixing base, and a check block is inserted into the surface of the round rod and extrudes the surface of the fixing plate; the device has the beneficial effects that the connecting rod and the wedge block are arranged, the ceramic piece is prevented from being blocked, the braking effect on the guide rail is improved, the limiting column and the rubber sleeve are arranged, automatic reset of the ceramic piece and the wedge block is achieved, the working efficiency of the braking device is improved, the telescopic check block is arranged, rapid disassembly and replacement between the fixing base and the fixing plate are achieved, and the practicability is high. And the connection between the fixing plate and the fixing seat is firmer.

The utility model relates to a CBS arrangement structure which comprises a vehicle body and a rear brake pedal, a front brake structure and a rear brake structure are arranged on the vehicle body, a rear brake arm is arranged on the vehicle body in a running fit mode, the rear brake pedal can be controlled to drive a rear brake assembly to rotate, and a rear brake pull rod and a linkage mechanism are arranged on the rear brake assembly. The linkage mechanism comprises a linkage inhaul cable, the linkage inhaul cable is connected with the front brake mechanism, when the rear brake pedal drives the rear brake assembly to rotate, one part of braking force pulls the rear brake pull rod to drive the rear brake mechanism to brake the rear wheels, and the other part of braking force is transmitted to the linkage mechanism to enable the linkage inhaul cable to drive the front brake mechanism to brake the front wheels. The purpose of braking the front wheel and the rear wheel at the same time is achieved through the arrangement of the linkage mechanism, the braking efficiency is improved, the driving safety is improved, the linkage mechanism is simple in structure and suitable for a motorcycle arrangement CBS system with insufficient space, the structure is simple and reliable, and investment is small.

The invention relates to the technical field of automobile braking, and discloses a braking control method, system and equipment for a distributed driving electric vehicle and a medium. The method comprises the steps that for the distributed driving electric vehicle, state data of the vehicle during braking are obtained, and whether the braking intention of a driver during braking is conventional braking or emergency braking is recognized according to the state data; the current longitudinal speed and the current side slip angle of the vehicle are obtained; the braking intention of a driver, the current longitudinal speed of the vehicle and the difference between the current side slip angle of the vehicle and the expected side slip angle of the vehicle in the absolute stable state serve as input data, the input data are input into the trained braking control model, and the braking torque used for stably braking the vehicle is obtained; and the vehicle is stably braked according to the braking intention of the driver and the obtained braking torque. According to the braking control method of the distributed driving electric vehicle, the control effect of the braking stability of the vehicle can be improved.

The invention discloses an unmanned mine car slip rate control method based on superhelix second-order sliding mode control. The method comprises the following steps: deriving a second-order slip rate system kinetic equation based on a wheel kinetic model; introducing a steepest differential tracker to carry out slip rate differential estimation; converting the second-order slip rate kinetic equation into an error variable form for expression; designing a non-singular sliding mode surface according to a fixed time convergence theorem, and calculating the control rate of second-order sliding mode control based on a superhelix algorithm: issuing a braking torque control signal to a hydraulic braking control unit of the unmanned mine car, and further adjusting the braking pressure of a wheel cylinder. The method has the advantages that the actual slip rate of the wheels is controlled to be close to the target slip rate, the locking phenomenon is prevented when the mine car is braked, and the braking efficiency and safety of the mine car are improved.

The invention provides a braking method and system of a commercial vehicle and the commercial vehicle. The braking method comprises the steps that under the condition that a working mode is a braking mode, the total braking force demand value of the vehicle and the maximum auxiliary braking force value capable of being provided by an auxiliary braking system are calculated according to the current operation working condition of the vehicle; when the total demand value of the braking force is not larger than the maximum auxiliary braking force value, the auxiliary braking system is controlled to conduct braking according to the total demand value of the braking force; and when the total demand value of the braking force is larger than the maximum auxiliary braking force value, the auxiliary braking system is controlled to conduct braking according to the maximum auxiliary braking force value, and a main braking system is controlled to conduct braking according to the difference value between the total demand value of the braking force and the maximum auxiliary braking force value. According to the braking method of the commercial vehicle, the braking effect of the auxiliary braking system can be exerted to the maximum extent so that braking energy can be recycled, and the energy recycling performance of the vehicle can be improved.

The application discloses a kind of carbon ceramic brake pad for grinding carbon ceramic brake disc, belong to brake pad technical field, solve the poor heat dissipation performance of existing ceramic brake pad, insufficient connection strength, leading to the problem of poor friction performance, it includes carbon ceramic lining plate and the carbon ceramic friction surface installed on carbon ceramic lining plate, multiple mortise grooves are set on the upper surface of carbon ceramic lining plate, multiple tenon heads matched with mortise groove are set on the lower surface of carbon ceramic friction surface, tenon head is embedded into mortise groove and forms mortise and tenon structure, connects carbon ceramic lining plate and carbon ceramic friction surface, ear plate is set on the circumference of carbon ceramic lining plate, and mounting hole is formed in ear plate;In the application, the friction coefficient is adjusted by designing ceramic phase composition and density of carbon ceramic friction surface and carbon ceramic lining plate, and carbon ceramic lining plate and carbon ceramic friction surface are connected by RMI process and mortise and tenon structure to improve the mechanical properties of connecting place, ensure braking safety, reduce thermal stress generated in braking process, so as to improve the friction performance, effectively guarantee braking effect, and prolong service life.

The present invention discloses a self-braking motor, which relates to the technical field of motors, and includes a motor housing, a motor shaft, a motor rotor and a nut, wherein the motor rotor and the nut are fixedly connected, the motor shaft is threadedly connected to the nut, a first one-way bearing and a second one-way bearing are provided on the motor shaft, and the two end faces of the nut are stop faces, and the end faces of the first one-way bearing and the second one-way bearing facing the nut are both meshed with the stop faces. It has the following beneficial effects: a nut is added between the motor rotor and the motor shaft, the nut is threadedly connected to the motor shaft, and one-way bearings meshing with the end faces of the nut are added at both ends of the motor shaft, and the self-braking of the motor is achieved by utilizing the axial movement of the nut and the action of the one-way bearing, the electromagnetic clutch and the power element are eliminated, the volume is greatly reduced, and the energy efficiency of the motor is improved, and meshing braking is adopted without the participation of wear parts, the braking effect of the motor is good, and there is no need to replace the wear parts frequently.

A disc brake with a seat-type sensor for monitoring brake positive pressure and a monitoring method thereof. The brake comprises a brake disc, a brake shoe cylinder, a brake seat, a disc spring group, a hydraulic cylinder, a piston, an adjusting screw, a rear cover and a lining plate. During braking, the bottom circular rings of the left and right annular grooves of the seat-type brake positive pressure sensor produce shear and bending deformations under the action of F1 and F2, which are strain areas. F1 is proportional to the strain amount. The strain signals of multiple strain gauges are output to a host computer through a signal line to monitor the magnitude of the brake positive pressure F1 in real time. F1 is used to diagnose faults and give control instructions: before driving, if it is equal to zero, driving is allowed; if it is not equal to zero, a brake failure to open is diagnosed and the current driving is locked; during operation, if it is not equal to zero, a brake application failure is diagnosed and safety braking is enabled; during braking, a value greater than or equal to the allowable value of the brake positive pressure is allowed to drive the next time; if it is less than the allowable value of the brake positive pressure, a brake positive pressure insufficient fault is diagnosed and the next driving is locked, thereby greatly improving the braking effect of the disc brake.

The utility model discloses an integrated oil brake braking mechanism which comprises a supporting pipe, a brake pump, an ejector pin, a foot brake, a brake hard pipe, a brake switch and a reset torsion spring. The foot brake comprises a foot brake bent rod and a pedal, one end of the foot brake bent rod is connected with the pedal, a first pin shaft penetrates through the other end of the foot brake bent rod, the ejector pin is rotationally connected to the end of the foot brake bent rod through the first pin shaft, a second pin shaft penetrates through the foot brake bent rod, and the foot brake is rotationally connected with the supporting pipe through the second pin shaft. The end, away from the foot brake, of the ejector pin is connected with a brake pump which is fixed to one side of the supporting pipe, and the end, away from the ejector pin, of the brake pump is connected with a brake hard pipe. The second pin shaft is sleeved with the reset torsion spring, a brake switch fixing piece is fixed to the supporting pipe, and the brake switch is installed on the brake switch fixing piece and connected with the main cable. The brake pump and the ejector pin are integrally assembled on the supporting pipe in advance and can be guaranteed to be on the same straight line, the brake effect is better, assembly is easy and convenient, and time and labor are saved.

The utility model relates to the technical field of agricultural harvesters, in particular to a hydraulic transmission type gearbox which comprises a gearbox shell, a gear shaft assembly and a gear shifting part are arranged in the gearbox shell, and the gear shaft assembly comprises a first gear shaft, a second gear shaft and a third gear shaft which are sequentially connected in a matched mode. The input end of the first gear shaft is connected with a hydraulic motor, the gear shifting part comprises a gear shifting assembly, a first fork shaft and a second fork shaft, the first fork shaft is provided with a second and third gear shifting fork, the second fork shaft is provided with a first gear shifting fork, and the gear shifting assembly is detachably connected with the first fork shaft and the second fork shaft. According to the hydraulic transmission type gearbox, a shell of an original gearbox is used, hydraulic input is adopted, a stepless speed change assembly and a clutch assembly are omitted, stepless speed change input can be achieved, and the equipment cost and the failure rate can be reduced.

The invention relates to the technical field of braking, in particular to a mining trackless rubber-tyred vehicle brake auxiliary device which comprises an outer box body, and a plurality of brake mechanisms matched with auxiliary brake discs are fixed to the side, close to the auxiliary brake discs, of the outer box body. The brake mechanism comprises an electromagnet embedded in the side wall of the outer box body and a supporting rod fixed to the side wall of the outer box body, a sliding sleeve is installed on the supporting rod in a sliding mode, a connecting arm is fixed to the end, away from the outer box body, of the sliding sleeve, and a brake disc is detachably installed on the connecting arm in a connected mode. The device has the beneficial effects that when a vehicle is braked, the electromagnets drive the magnetic suction plates to move towards the electromagnets to drive the brake discs to be close to the auxiliary brake disc, friction force is increased through the multiple brake discs, and the braking effect is improved; during braking, the brake disc cooling module can spray water to the auxiliary brake disc for cooling, the normal working performance of the brake disc is guaranteed, the service life of the brake disc is prolonged, and meanwhile stable operation of an auxiliary brake system can be maintained.

The invention relates to an electro-mechanical brake caliper, a brake system and a vehicle. The electro-mechanical brake caliper comprises a caliper body, a brake disc and a brake disc, the brake pad is arranged on the caliper body; the driving module is arranged on the caliper body; the driving module comprises a driving part, a transmission mechanism, a first speed reducing mechanism, a second speed reducing mechanism, a first piston assembly and a second piston assembly; the driving part is in transmission connection with the first speed reducing mechanism and the second speed reducing mechanism through the transmission mechanism, the first speed reducing mechanism is in transmission connection with the first piston assembly, the second speed reducing mechanism is in transmission connection with the second piston assembly, and the first piston assembly and the second piston assembly can move in the first direction so as to abut against and drive the brake pad to move. The electronic mechanical brake caliper has good brake performance.

The invention belongs to the technical field of hydraulic auxiliary braking of engineering machinery, and particularly discloses a CST function-based retarder bent blade parameterization modeling method, which comprises the following steps of: constructing a unit blade bone line and a unit blade thickness distribution curve by using a CST function, and designing a curve according to a circulating circle; superposing the unit thickness distribution curve on a unit blade bone line to construct a unit blade suction surface and pressure surface curve, and finally, performing rotation scaling operation on the unit blade curve to obtain a real curved blade curve. And finally, mapping the two-dimensional blade molded line to a three-dimensional space through conformal transformation to construct a three-dimensional blade entity of the hydraulic retarder and a three-dimensional impeller model of the hydraulic retarder. According to the method, the functions of rapid design of the blade profile of the retarder, rapid wide-range adjustment of the braking performance and high braking power density design can be achieved, and rapid development and industrial application of the retarder in the braking field can be accelerated.

The present invention belongs to the technical field of motorcycles, and in particular to an anti-lock braking and electronic parking brake system, comprising an ABS control pump, a rear brake pump, a foot brake, a rear electronic parking caliper, a front brake pump, a hand brake, a front brake caliper, a vehicle body and a brake oil pot, wherein an ABS control pump is arranged at the middle position of the vehicle body, a rear brake pump is arranged at the middle position of one side of the vehicle body, and the rear brake pump and the ABS control pump are fixedly connected through a brake oil pipe, a foot brake is arranged at the upper end of the rear brake pump, rear electronic parking calipers are arranged on both the left and right sides of the rear end of the vehicle body, and the rear electronic parking caliper and the ABS control pump are fixedly connected through a brake oil pipe, a front brake pump is arranged at the front end of one side of the vehicle body, and the front brake pump and the ABS control pump are fixedly connected through a brake oil pipe, a hand brake is arranged at the upper end of the front brake pump, and front brake calipers are arranged on both the left and right sides of the front end of the vehicle body, the present invention has good braking effect and is relatively safe, and is convenient for safe driving of the vehicle body.

This invention relates to a brake disc optimization method, device, and medium based on four-factor constraints. The method includes: obtaining the mass of a target brake disc; establishing a model with an undercarriage structure based on the parameters of the target brake disc, and obtaining the maximum limiting temperature of each part; performing optimization design without exceeding the original mass to obtain the optimized brake disc; performing CFD steady-state simulation to calculate the steady-state cooling pump air ratio; when the maximum temperature is lower than the maximum limiting temperature, determining whether it meets the preset optimization target based on the steady-state cooling pump air ratio; performing CFD transient simulation analysis on candidate brake discs to calculate the transient cooling pump air ratio; when the maximum temperature is lower than the maximum limiting temperature, determining whether it meets the optimization target based on the transient cooling pump air ratio; if so, the target brake disc is the preferred brake disc. Compared with the prior art, this invention solves or partially solves the problem that existing brake disc optimization methods lack constraints during the optimization process, leading to unsatisfactory optimization.

This application discloses a hub motor and a mobile robot. The hub motor includes a rotor, a stator, a drive assembly, a braking assembly, and a brake disc. The brake disc is fixedly connected to the rotor. The braking assembly is mounted on the stator. The first centerline of the brake disc does not coincide with the second centerline of the braking assembly. The brake disc has brake holes spaced apart around the first centerline. The drive assembly connects to the braking assembly and drives it, allowing the braking assembly to approach the brake disc and extend into the brake holes, or move away from the brake disc and exit the brake holes. In this way, braking is achieved simply by inserting the braking assembly into the brake holes of the brake disc. Compared to friction brakes, this solution achieves greater braking torque without increasing the size of the hub motor, resulting in higher braking performance and reliability. Furthermore, the multiple brake holes spaced apart on the brake disc significantly shorten braking time.