36results about How to "Improve steering characteristics" patented technology

The invention provides an oil pump dual-motor drive device with an electric-hydraulic power steering function. A main drive motor (brushless DC motor) directly drives an oil pump to rotate, and a secondary drive motor (brush DC motor) works in due time. The rotation speed, torque and other working states of the double motors can be adjusted in the manner that an electronic control unit collects steering wheel rotation speed signals, car speed signals, current signals of the double motors and the like, and dynamic coupling of the main drive motor and the secondary drive motor can be achieved through a synchronous belt and a belt wheel by means of a one-way clutch. The double motors, a power transmission and coupling mechanism, the steering oil pump and a steering controller are of an integrated structure, and the integrated design of the dual-motor electric oil pump can be achieved. According to the oil pump dual-motor drive device, a dual-motor distributed type control scheme is adopted, the degree of freedom of system control is improved; low-speed steering is convenient, and high-speed road feel is good; the motors work at high speed only when power assistance is needed, and rotate at low speed on the condition of no steering, and the energy consumption of a system is low; when one motor breaks down, the other motor can still provide a certain steering power, so safety of the system is improved.

The invention discloses a distributed hub driving electric car chassis structure. The structure mainly comprises a hub driving and braking integrated system, a hub brake system, a rear steering system, a back suspension system, a front steering system, a front suspension system and a car frame. The hub motor is installed inside a wheel, the motor rotor part and the brake system are connected through a bolt, the brake system is connected with a steering pull rod of the steering system and a supporting shaft of the suspension system through a knuckle, the front suspension is connected with the car frame through an A-shaped arm, and the rear suspension is in rigid connection with the car frame through an upper base of a damping spring. The chassis adopts a four-wheel steering structure, the rear wheel adopts electric assistance independent steering, the front suspension adopts a MacPhersan type independent suspension, and the rear suspension adopts a dragging arm type independent suspension.

The invention discloses a double power source drive vehicle torque distribution method. An output torque of front and rear power sources can be adjusted in real time according to the steering characteristics of a vehicle, under the condition of not changing an original power system structure and not increasing the cost, by optimizing inter-axle drive torque distribution coefficients, the steeringcharacteristics of the vehicle are improved, and the operating stability of the vehicle is improved; under the condition of without increasing extra sensors, maximal accelerated speed information of the vehicle is automatically learned, and thus, a road adhesion coefficient is obtained; and the accelerating in/out bending working condition of a driver further can be automatically identified, by adjusting the output torque of the drive sources of the front and rear axles, the in/out bending characteristics of the vehicle is improved, and in/out bending of the driver is assisted.

The invention provides a power steering device. The device comprises a housing assembly (1), an input shaft and screw assembly (2), a toothed fan shaft assembly (3), a corner torque sensor (8), and a motor assembly (11), wherein the corner torque sensor is axially connected with an input shaft and a screw shaft by rotating the input shaft forward or backward through a steering wheel; according to the state information (such as a vehicle speed, a turning radius and a road surface inclination) of a travelling vehicle and vehicle structure characteristics (such as a tread, a wheel base and weight), at different speeds, a system dynamically predicts and analyzes to obtain the maximum angle alpha0 permitted by the steering wheel under the assumption that a vehicle is in a critical state of rollover or sideslip; when a driver controls the vehicle over the time of the maximum angle, the system drives a motor to increase a steering resistance reversely and rapidly and prevent the steering wheel from turning, thereby effectively avoiding the rollover or sideslip of the vehicle when the driver controls the vehicle. The power steering device can intelligently calculate the maximum angle permitted by the steering wheel, thereby improving the safety degree of the steering device.

The invention discloses a steering device of an engineering machine. The steering device of the engineering machine comprises a speed changing box, a steering motor, a main transmission shaft transferring power to output shafts at two ends and a gear train and is provided with a first planet row, a second planet row and a third planet row, wherein sun wheels of the planet rows are in rigid connection with the main transmission shaft. The steering device is further provided with a first bevel gear pair and a second bevel gear pair, wherein the main transmission shaft outputs power and transfers the power to the first planet row through the first bevel gear pair, and the steering motor outputs steering power to the second planet row through the second bevel gear pair. The power is transferred to a terminal output shaft through planet carriers of the second planet row and the third planet row. By adopting the arrangement, the steering device is simple and compact in structure, achieves in-situ steering characteristic of the engineering machine and improves the steering sensitivity. On the basis, the invention further provides the engineering machine provided with the steering device.

The invention provides a housing assembly of an electric power steering device and a device of same. The housing assembly comprises a first installation cavity, a second installation cavity and a third installation cavity, wherein the first installation is arranged along a horizontal direction and a non-through cavity; the second installation cavity is a non-through cavity; the third installation cavity is a through cavity; the first installation cavity communicates with the second installation cavity; the first installation cavity communicates with the third installation cavity; and the second installation cavity does not communicate with the third installation cavity. The housing has great overall strength and can stand complicate shock and vibration and has reliable use; the housing assembly has great technology property and is easy to process and form; low cost is required, so the housing assembly is suitable for batch production and has high integrating degree and great assembling performance; and the housing assembly is applied to the steering device.

The invention provides a power steering device of an intelligent computing motor target torque. The power steering device comprises a housing assembly (1), an input and screw rod assembly (2), a gear sector shaft assembly (3), a corner torque sensor (8) and a motor assembly (11). When an input shaft is rotated forwardly or backwardly by a steering wheel, the input shaft is connected with a screw rod shaft by an elastic torsion bar and a certain angle is formed between the input shaft and the screw rod shaft, the screw rod shaft can coaxially rotate with the input shaft as the screw rod shaft and the input shaft reach an angular displacement banking limit; the corner torque sensor shaft is axially connected with the input shaft and the screw rod shaft; and the control system computes a target torque of the motor assembly via collecting an output torque value of the corner torque sensor, and drives the motor assembly to output an assisting torque via a torque control mode. The target torque of the motor assembly can be intelligently computed and the motor assembly can be driven to output the assisting torque via the torque control mode, so intelligence degree of the steering device can be improved.

The invention discloses an electric push rod power-assisted steering device which comprises a steering pull rod with a tension-compression stress sensor, an electric push rod and a power-assisted steering controller. The tension-compression stress sensor is mainly used for detecting the size and the direction of force applied to the steering pull rod and mounted in the middle of the steering pullrod in a threaded connection manner. One end of the electric push rod is mounted at the middle right end of a steering linkage rod, and the other end of the electric push rod is mounted at the middleleft end of a front axle in a single-rod offset manner. The power-assisted steering controller mainly comprises a 51 single chip microcomputer, a signal acquisition and processing circuit, an electricpush rod driving circuit, a monitoring circuit, a protecting circuit and the like and is used for controlling expansion of the electric push rod and accordingly realizing power-assisted steering according to acquired stress of the steering pull rod. Energy consumption can be effectively reduced, environmental pollution is reduced, the device can adapt to various running conditions, steering characteristics of a vehicle are improved, and the device has good low-temperature working performance.

The invention provides a planet wheel type obstacle crossing robot. The planet wheel type obstacle crossing robot comprises a frame, a front driving set and a rear driving set. a front driving group and the rear driving group are respectively connected with the front end and the rear end of the frame, and the front driving group comprises a dual-drive steering wheel structure; a dual-drive steering wheel structure comprises two driving wheels and two first driving devices, and different rotating speeds are output to the two driving wheels through the two first driving devices correspondingly, so that the dual-drive steering wheel structure steers; a rear driving set comprises two planet wheel sets, two second driving devices and a planet wheel set suspension structure, and each planet wheel set is driven independently; each planet wheel set comprises a front wheel, a rear wheel and an upper wheel, the three wheels of each planet wheel set climb over obstacles in a matched mode under the action of the driving torque output by the second driving devices, the two second driving devices control the rotating speeds of the two planet wheel sets respectively, steering of the two planet wheel sets is achieved, and the two planet wheel sets are driven to rotate. The obstacle crossing robot is driven by the front driving set and the rear driving set to cross obstacles and steer.

The invention relates to an independent steering system with a push-pull cylinder arranged on a single trailing arm of a single trailing arm suspension, and belongs to the field of electric vehicles.The system comprises the single trailing arm, a push-pull cylinder, a steering knuckle, a steering knuckle transition piece and the like. One side of the push-pull cylinder is hinged to the steering knuckle, the other side of the push-pull cylinder is hinged to the steering knuckle transition piece, the steering knuckle is fixedly connected to a wheel assembly, the steering knuckle transition piece is fixedly connected to the single trailing arm, and the steering knuckle and the steering knuckle transition piece are connected through a pair of thrust knuckle bearings and corresponding installation structures to achieve a relative rotation function. The system is compact in structure and stable in steering, provides a beneficial measure for independent steering of the single-trailing-arm suspension, solves various problems caused by a fact that a single trailing arm independent suspension driven by a hub motor only uses differential steering, and has important reference significance forresearch and development of the single-trailing-arm independent suspension.

The invention discloses a wire-controlled hydraulic steering device comprising a steering input unit, a control unit, a pressure generating unit, a wheel steering unit and a fuel supply line, the oilsupply line connects the oil to the pressure generating unit to form two oil supply branches for supplying to the left and right wheels respectively, a switch valve is installed at the connection partof the pressure generating unit and each oil supply branch, the control unit prevents oil pressure from being supplied from the pressure generating unit to the oil supply branch when the on-off valveis controlled to be closed, and when a leak occurs, the control unit controls the separation valve to open the two oil supply branches to be connected to each other and shield the oil leak section toensure sufficient steering oil pressure. The invention is provided with two oil supply branches, which are respectively supplied to left and right wheels, and the two oil supply branches are mutuallyindependent when oil leakage does not occur. When leakage occurs, the two oil supply branches are opened through the separation valve to connect with each other and shield the oil leakage section toensure sufficient steering oil pressure.

The invention provides a heavy circulating ball type double-die electric steering gear. The heavy circulating ball type double-die electric steering gear comprises a steering gear housing assembly, an input shaft and screw assembly, a gear sector shaft assembly, a supporting seat assembly, a worm gear, a worm, an inner end cover assembly, a steering angle and torque sensor, an outer end cover assembly, a quincuncial connecting sleeve assembly and a motor assembly, wherein the motor assembly is treated as a power source, and the power is transmitted to the input shaft and screw assembly through the worm gear and the worm; the input shaft and screw assembly can output the torque and angular displacement through a gear sector shaft; the input shaft locking device has two control modes, namely, an angle position control mode and a torque boosting control mode. According to the heavy circulating ball type double-die electric steering gear, a large-reduction ratio mechanism, the steering angle and torque sensor and the like are adopted to replace a turning valve structure of a circulating ball type hydraulic power steering gear; the hydraulic transmission is converted into intelligent electric transmission on the premise that the space is not additionally increased; the power consumption is reduced by 300% and the maximum output torque is increased by 5% by being compared with those of the circulating type hydraulic power steering gear with the same size.

The invention discloses an active lift transfer method for improving the safety of an automobile emergency avoidance working condition in the field of automobile safety control, which absorbs air at the lower part of a rear axle through dense holes uniformly distributed in two rear axle air hoods, reduces the air pressure at the rear axle of a chassis, and conveys the absorbed air to two front axle air hoods and blows out the absorbed air; the air pressure at the front axle of the chassis is increased, so that the insufficient steering characteristic of the emergency automobile under the deceleration avoidance working condition is improved; air at the rear axle is absorbed through the dense holes evenly distributed in the rear axle air hood on one side and conveyed to the front axle air hood on the other side to be blown out, meanwhile, air at the front axle is absorbed through the dense holes evenly distributed in the front axle air hood on one side and conveyed to the rear axle air hood on the other side to be blown out, and air at the chassis of the emergency automobile can be transferred in an opposite-side crossed mode. Therefore, the purpose of active transfer of air lift isachieved, the transverse load transfer rate of the emergency automobile during steering avoidance is reduced, and the driving safety of the automobile during steering avoidance of the emergency automobile is improved.