31results about How to "High steering sensitivity" patented technology

The invention discloses a four wheel independent steering electric car steering control method and a four wheel independent steering electric car steering control system, and solves the technical problem that a four wheel independent driving and four wheel independent steering electric car is lack of a stable and affordable steering strategy in the prior art. The four wheel independent steering electric car steering control method includes: when an electric car needs to swerve, obtaining a steering wheel turning angle and car speed of the electric car; based on a car speed and car speed transmission ratio mathematic model, obtaining a variable transmission ratio between the steering wheel angle and a rear wheel turning angle of the electric car at different car speeds; obtaining a front wheel turning angle of the electric car based on the steering wheel turning angle; obtaining a car ideal condition of the electric car based on a variable transmission ratio car ideal model, the car speed and the front wheel turning angle; simultaneously, obtaining a car virtual condition of the electric car based on a four wheel steering electric car linear two freedom model, the car speed and the front wheel turning angle; obtaining the rear wheel turning angle of the electric car based on the car ideal condition and the car virtual condition of the electric car, and controlling the electric car to swerve based on the front wheel turning angle and the rear wheel turning angle of the electric car.

The invention discloses a torque vector control system of a hub four-wheel drive purely-electric vehicle. The torque vector control system comprises a vehicle state monitor, a friction coefficient estimator, a differential torque yawing moment decision making module, a torque control distributor module and a torque coordination control module. The differential torque yawing moment decision makingmodule is used for acquiring vehicle differential torque yawing moment by establishing a kinematics parameter relationship according to the driver input steering wheel rotating angle, vehicle motion information, the road surface adhesion coefficient, lateral tire force and longitudinal tire force. The torque control distributor module is used for acquiring ideal torque distributed values of all wheels according to four-wheel hub motor brake and drive torque requirements, the vehicle motion information, the road surface adhesion coefficient, tire parameter information, the battery SOC value anddifferential torque yawing moment. The control stability of the vehicle can be improved, and the steering sensitivity of the vehicle can be improved.

The invention relates to an off-road type forklift with hydrostatic four-wheel drive and an articulated frame. The forklift comprises a front forklift body and a rear forklift body, which are connected through an articulation mechanism and a steering cylinder, wherein two wheels are respectively arranged on the front forklift body and the rear forklift body; each wheel is arranged at the output end of one hydraulic motor; a drive cabin is arranged on the front forklift body; a lifting mechanism is connected at the front side of the front forklift body; an engine is arranged on the rear forklift body; a transfer case is connected at the flying wheel end of the engine; three oil pumps, namely a variable pump, a first constant pump and a second constant pump are connected at the output end of the transfer case; the variable pump is connected with four hydraulic motors; the first constant pump is connected with the lifting mechanism; and the second constant pump is connected with a steering system. According to the forklift, the articulated frame and the hydrostatic four-wheel drive are adopted, the wheels can be ensured to be fully grounded, and the maximal wheel side thrust of the hydraulic motors is brought into play; and the off-road performance of the forklift is good, so that the application range of the forklift is greatly expanded.

The invention discloses a steering device of a large wind driven generator. The steering device comprises blades (1), a wind turbine industrial controller (2), a wind indicator (3), a lightning rod (4), a wind speed measurement instrument (5), a fan steering flange disc (6), a stepper motor rotating point (7), a wind turbine tower drum (8), and a power transmission and data transmission integrated device (9). The steering device provides a function of measuring basic data of wind energy, including wind speed, wind direction and the like, and further has a lightning protection function; the working principle of the device is as follows: the wind indicator (3) and the wind speed measurement instrument (5) transmit the measured wind energy data to the wind turbine industrial controller (2) in the wind driven generator; the wind turbine industrial controller (2) analyzes the data, and compares the data with the wind meeting direction of the fan steering flange disc (6) to find out the difference and the angle change; and the wind turbine industrial controller (2) gives a starting command to a stepper motor for adjusting the wind meeting angle of the wind turbine to realize the maximal wind energy utilization.

The invention discloses an automobile steering device which comprises a let steering pull rod, a right steering pull rod, a steering device shell body, a steering input shaft, a pinion, a left handspike, a right handspike and a cam, wherein, the center of the cam is provided with a ring gear whose center is rotatablely connected with the steering device shell body, and the periphery of the ring gear is provided with a left cam slot and a right cam slot. One end of the left handspike is provided with a left pin roll inserted in the left cam slot, and the other end of the handspike is hinged with the left steering pull rod; and one end of the right handspike is provided with a pin roll inserted in the right cam slot, and the other end of the handspike is hinged with the right steering pull rod. The invention makes use of a cam mechanism to cause rotation angles of the left steering wheel and the right steering wheel meet the Ackermann curve in real time, each wheel of the steering device carries out pure rolling movement when an automobile steers, and the abnormal abrasion is reduced when tyres steer, thus enhancing the life of the tyres greatly. The variable transmission ratio is realized, and the operation stability and the security are enhanced.

The invention provides a rack and pinion steering device, comprising a drive pinion (3) and a pressure piece (5), wherein the drive pinion (3) can be rotatably arranged in a steering device shell (2), and is meshed with the tooth part of a rack (4), and can move axially on the steering device shell (2),the pressure piece (5) can be rotatably arranged in the steering device shell (2), and can be loaded on the rack (4) through a spring, and can be used for putting the rack (4) preload to the drive pinion (3),the diameter of the rack (4) increases at least at the tooth part from the central area (10) to the axial tail end of the rack (4),and the rack (4) always contacts the pressure piece (5) only by the sliding friction along the whole process of the rack.

An apparatus and method for providing power assisted steering for a marine craft having a manually operable steering pump and a hydraulic steering actuator. A powered hydraulic pump is hydraulically connected between the manually operable pump and the actuator. Hydraulic fluid volume output of the steering pump and hydraulic fluid volume output of the powered pump are sensed. The fluid output of the steering pump is compared with the fluid output of the powered pump and the powered pump is operated so that the output of the powered pump is commensurate with output of the steering pump.

The invention provides an Ackerman steering trapezium control method, device, mechanism and system and an automobile with the system. According to the Ackerman steering trapezium control method, a first steering vehicle wheel and a second steering vehicle wheel are controlled by the Ackerman steering trapezium control mechanism to change in a preset range according to an Ackerman theoretical curve. The Ackerman steering trapezium control method comprises the following steps that torque data, rotation angle and acceleration data, position data of a first retractable steering arm and a second retractable steering arm and vehicle speed data are acquired; according to the torque data, the rotation angle and acceleration data, the position data of the first retractable steering arm and the second retractable steering arm and the vehicle speed data, the first retractable steering arm and the second retractable steering arm are controlled to conduct extension and retraction to drive the firststeering vehicle wheel and the second steering vehicle wheel to change in the preset range according to the Ackerman trapezium theoretical curve. According to the Ackerman steering trapezium controlmethod, pure rolling of the vehicle wheels can be achieved at the same time of vehicle steering, and the steering performance is improved.

The invention discloses a collision protection structure and a sweeping robot. The collision protection structure comprises a collision protection plate and at least two pressure sensing elements, and the plurality of pressure sensing elements are connected to the inner wall surface of the collision protection plate; when the collision protection plate collides with an external obstacle, the pressure sensing elements are used for sensing the condition of the collision protection plate; and the sweeping robot comprises the collision protection structure and a shell, the shell is the collision protection plate or the shell comprises the collision protection plate and a shell main body, and the collision protection plate is arranged on the shell main body. In the application, the collision protection structure occupies less space of the shell of the sweeping robot, and the collision protection structure is more sensitive in sensing.

The invention discloses a high-speed stealth fixed wing aircraft capable of vertically rising and falling. The high-speed stealth fixed wing aircraft comprises an aircraft body and side wings of a fixed wing aircraft, wherein lift fans are arranged on the front side and the rear side of each side wing, a thrust fan is arranged at the middle section of each side wing, and a jet engine is arranged at the rear section of the aircraft body. The lower portion of each thrust fan is provided with a downward nozzle, and the upward auxiliary lifting force is provided through the downward nozzles. The rear portion of each thrust fan is provided with a closed cover door, and an air inlet of the jet engine communicates with the thrust fans. According to the high-speed stealth fixed wing aircraft, themain advantages of a four-rotor aircraft, a propeller aircraft, a jet aircraft and a hovercraft are integrated, the system structure is simplified, and the reliability of the system is enhanced. The flight and steering maneuvering in the air can be realized in a plurality of modes, the system redundancy is high, and the reliability is high. According to the thrust engine, rotation and conversion in the vertical-horizontal direction do not need to be carried out, the direction of the air flow can be controlled only by controlling opening and closing of the cover door, and the system is simple and reliable in structure.

The invention discloses an adjustable hinge-joint steering device for an explosion-proof type crawler-type rock raking machine and belongs to the field of mining machinery. The adjustable hinge-joint steering device for the explosion-proof type crawler-type rock raking machine comprises a working mechanism (1), a machine frame (5), knuckle bearings (3) and hinge pins (2), wherein the knuckle bearings are arranged on a hinge-joint head of the machine frame, the hinge pins penetrates the knuckle bearings to connect the working mechanism with the machine frame, and the tail end of each hinge pin is provided with a locknut (4); and the hinge pins are fixed onto the working mechanism through bolts (7). The adjustable hinge-joint steering device for the explosion-proof type crawler-type rock raking machine has the advantages that when the adjustable hinge-joint steering device for the explosion-proof type crawler-type rock raking machine is utilized and when the hinge pins are in contact with the top surfaces of the knuckle bearings, the lifting or descending of the working mechanism can be achieved through the different locking degrees of the nuts at the tail ends of the hinge pins, the flexible adjustment of the gap between the working mechanism and the machine frame can be achieved, meanwhile the steering sensitivity of the working mechanism can be improved, the requirements of installation can be well met, and requirements on the steering of the working mechanism of the rock raking machine on a construction site can also be met.

The invention relates to a carbonless trolley. The carbonless trolley comprises a trolley frame, a driving mechanism, a transmission mechanism, a steering mechanism and a walking mechanism; the trolley frame comprises a trolley frame plate and a bearing block; the driving mechanism comprises a winding shaft and vertical rods; the transmission mechanism comprises a transmission gear set and a steering gear set, the transmission gear set is formed by a large gear and a small gear, the large gear is connected with the winding shaft, the small gear is installed on a rear wheel shaft and used for driving a rear wheel, and the steering gear set is composed of a turbine, a worm and a small steering gear; the steering mechanism comprises a steering block, a steering rod and steering plates, and the steering block is connected with a turbine shaft; the walking mechanism comprises a steering wheel and two driving wheels. The carbonless trolley has the advantages that the carbonless trolley is compact in structure and few in part, and periodic steering can be reliably completed to achieve long-distance S-shaped trajectory walking.