30results about How to "Improve backing performance" patented technology

The invention discloses an aligning control method and an aligning control device for an electric power-assisted steering device. The method comprises the following steps: establishing a mathematicalmodel of the electric power-assisted steering device; testing the steering work under different road resistance through a bench test, tabling results, and storing a table in an electronic control unit; determining to enter an aligning control condition; estimating the driving road surface resistance torque of a vehicle; calculating the energy required to be provided by a power-assisting motor whenthe steering wheel of the vehicle is to be aligned according to the road surface resistance moment, and calculating to obtain the assistant aligning torque required to be provided by the power-assisting motor; finally, obtaining a vehicle speed related coefficient and a steering wheel related coefficient to modify the assistant aligning torque according to vehicle speed information and aligning torque information. According to the aligning control method and the aligning control device for the electric power-assisted steering device, the aligning performance of the electric power-assisted steering device is improved on the premise of not influencing the operating hand feel of a driver and not increasing the required sensors.

The invention provides an angle signal-free electric power steering alignment compensation control device, which comprises a motor connected with an output shaft and a controller connected with the motor, wherein the controller comprises an alignment compensation control module and a drive module connected with the alignment compensation control module. The angle signal-free electric power steering alignment compensation control device can provide alignment compensation current and improve alignment.

The invention relates to the field of engineering machinery, in particular to an electric hydraulic power-assisted steering system and a crane. The electric hydraulic power-assisted steering system comprises a steering wheel, an electric power assisting device and a steering gear, wherein the electric power assisting device is positioned between the steering wheel and the steering gear; the electric power assisting device comprises a motor, a sensor and a reduction mechanism; the sensor comprises an angle sensor and a force moment sensor; an oil hole in the input end of the steering gear is connected to an oil pump and a hydraulic oil tank; an oil hole in the output end of the steering gear is connected to a power assisting oil cylinder through a hydraulic pipeline; and the steering gear is connected to a tire through a transmission mechanism. The electric power assisting device is additionally arranged in front of the steering gear with a hydraulic variation ratio; the steering wheelpasses through the electric power assisting device and then reaches the steering gear with the hydraulic variation ratio, so that an electric hydraulic power-assisted steering function of the vehicleis realized, light and reliable low-speed traveling operation and stable high-speed traveling operation of the vehicle can be guaranteed, vehicle travelling safety is guaranteed, and steering returnability of the vehicle is improved.

The invention relates to an active return-to-middle control system used for a wheel-side electric drive independent suspension. The system comprises suspension units, electric wheel units, a bracket assembly, a frame, a steering mechanism and an active return-to-middle control device, wherein the bracket assembly is transversely installed at the front end of the frame, the suspension units are installed at the two ends of the bracket assembly in a bilateral symmetry mode, the electric wheel units are installed on the suspension units, the steering mechanism is installed on the frame, and the active return-to-middle control device controls the steering mechanism to drive the electric wheel units to achieve power-assisted steering or active return-to-middle control. The active return-to-middle control system can reasonably provide aligning torque needed by wheels, the return performance is improved, and 'road feeling' is good.

The invention relates to a steering column assembly and a vehicle. The steering column assembly comprises a transmission shaft, a first housing, and an aligning mechanism. The first housing locks on the periphery and surrounds on an upper transmission shaft in an axial moveable manner. The aligning mechanism is connected between the transmission shaft and the first housing, and an elastic piece isarranged between the first housing and the aligning mechanism. The first housing is connected with the transmission shaft in a transmission manner, so that when the transmission shaft rotates relative to the circumferential direction of the first housing, the first housing can move axially relative to the transmission shaft. The aligning mechanism can store energy just in an initial stage when the transmission shaft starts to rotate forward, and subsequent free rotation is not influenced. In alignment, through release of elastic potential energy of the elastic piece which rotates in an opposite direction with the transmission shaft and is on a tail section, a steering wheel is assisted to align, so as to improve returnability performance of vehicle steering, and normal rotation of the transmission shaft is not influenced.

The invention discloses a steering gear supporting bushing processing method and a supporting bushing structure. The processing method comprises the following steps: firstly, uniformly forming concave grooves along an inner hole premoulding circumferential direction of a rack shell; and secondly, forming an injection moulding supporting filler block at the concave grooves on the rack shell, wherein the injection moulding supporting filler block comprises convex parts formed in the concave grooves of the rack shell in an injection moulding manner and an annular part formed in a rack shell inner hole in the injection moulding manner; forming through holes and zigzag embossments which are uniformly distributed in the circumferential direction in the injection moulding manner, wherein the zigzag embossments are formed on the circumference surface where the annular part is in contact with a rack; and the zigzag embossments are through along axis direction of the rack, diameter of an inscribed circle of the annular part along the zigzag embossments is smaller than that of the rack, and the supporting filler block formed in the injection moulding manner, the annular part and the rack shell form an integrated structure. Good turning performance of the whole vehicle is guaranteed while fit clearance between the supporting filler block and the rack is small; enough rack supporting is provided in the radial direction; the supporting filler block is formed in the shell in the injection moulding manner, and percent of pass of products is high; and a rack stopping block does not need to be limited in the axial direction.

The invention discloses a wire-controlled electric power steering system of a commercial vehicle. The steering system comprises a control area network bus, an electronic control unit, a torque sensor,a vehicle speed sensor, a motor sensor, a current magnitude sensor and a current direction sensor; a signal output end of the control area network bus is in control connection with a signal receivingend of the electronic control unit, signal output ends of the torque sensor and the vehicle speed sensor are in feedback connection with a signal receiving end of the electronic control unit, a signal output end of the electronic control unit is in control connection with a signal input end of the motor sensor, a signal output end of the motor sensor is in control connection with signal receivingends of the current magnitude sensor and the current direction sensor separately, and signal output ends of the current magnitude sensor and the current direction sensor are in feedback connection with a signal receiving end of the electronic control unit; three steering modes of intelligent driving, electric power steering and driver manual steering can be achieved.

The invention relates to a bi-directional thrust rolling bearing which comprises a shell assembly, a shaft washer, a cylindrical roller, a retainer, a race and a roller pin. The shell assembly comprises an upper shell and a lower shell. The upper shell comprises a large barrel, a large-end circular ring, a small barrel and a small-end circular ring. The large barrel and the small barrel are connected into an integrated structure through the large-end circular ring. The small-end circular ring is arranged at the end, opposite to the large-end circular ring, of the small barrel. The shaft washer, the cylindrical roller, the retainer and the race are all arranged in the space defined by the large barrel and the large-end circular ring. The roller pin is arranged in the space defined by the race, the small barrel and the small-end circular ring. According to the technical scheme, the bi-directional thrust rolling bearing comprises the shaft washer, the cylindrical roller, the retainer, the race, the shell assembly and the roller pin, and therefore the bearing can bear large radial stress and can also bear large axial stress; and a maintenance-free structure is added, the maintenance cost spent when vehicles are used is reduced, the vehicle using efficiency is improved, installation is convenient, and reliability is improved.

The invention discloses a method for aligning a virtual visual field to a user visual field. When a user uses the VR glasses to experience panoramic content; when the user passively changes the own spatial position, the user can send an instruction for aligning the virtual view, and after the program receives the instruction, no matter what the panoramic content on the current display screen is, the panoramic content is restored to the preset main body picture, i.e., the preset main body picture returns to the user view, so that the method is applicable to comprehensive scenes: virtual reality. Aligning mode: the operation is simple and the learning cost is low, the aligning effect is good and rapid, the transmission is natural, the method provides various convenient and rapid means for different application scenes under the condition that the preset main body picture deviates, displays the preset main body picture to the user, is simple in alignment mode operation and good in effect,effectively improves the user experience, and enhances the experience effect of virtual reality content.

The invention discloses a motor direct-drive automobile electric power steering (EPS) device and aims at changing the worm and the worm wheel driving modes of the traditional EPS system of an automobile steering gear and using the driving mode of an output shaft of a motor direct-drive assembly as a substitute so as to overcome a series of defects of the old type driving mode. The motor direct-drive automobile EPS device comprises a motor and is characterized in that an assembly output shaft passes through the center of the motor; one end of the output shaft is connected with an assembly input shaft through a torque rod, and the other end of the output shaft is connected with a universal joint; the motor is also connected with an EPS control module through conducting wires and a plug; and the EPS control module is the control module of the electric power steering system of the automobile steering gear. The invention is mainly used as the automobile electric power steering device.

The invention discloses an electric power-assisted steering device for an explosion-proof rubber-tyred vehicle, which can realize the electric steering of an underground explosion-proof rubber-tyred vehicle and is a novel steering technology. The power-assisted steering device works in a time-sharing manner, and the motor only provides assistance during steering, so that the energy consumption can be obviously reduced. The steering assisting power can be adjusted through software, steering portability at the low speed and operation stability at the high speed can be considered, and the return performance is good. The device is compact in structure, light in weight and easy to maintain. By changing the setting of a program, the electric power-assisted steering system can be matched with different explosion-proof rubber-tyred vehicles, serialization can be formed, and the intelligent control level of the underground explosion-proof rubber-tyred vehicle is greatly improved.

The invention relates to a two-way thrust rolling bearing, including a shell, a shaft ring, a cylindrical roller, a cage, a seat ring and a needle roller; the shell includes a large cylinder, a large end ring, a small cylinder and a small end ring; the large cylinder and the small cylinder The body is connected by a large end ring, and the small end ring is set at the opposite end of the small cylinder body and the big end ring; the shaft ring, cylindrical roller, cage and seat ring are all set at the large cylinder body and the big end ring. In the space formed by the ring; the needle roller is arranged in the space formed by the seat ring, the small cylinder and the small end ring. The bidirectional thrust rolling bearing of this technical solution includes a shaft ring, a cylindrical roller, a cage, a seat ring, a shell and a needle roller, so that the bearing can bear not only a large radial force, but also a large axial force; Maintain the structure, reduce the maintenance cost when the vehicle is in use, improve the efficiency of the vehicle; easy to install; improve reliability.

The invention relates to an electric-powered steering device used in vehicles to overcome self-damping, the electric-powered steering device comprises a worm and gear, a torque sensor, a servo motor, and a gear rack transmission device consisting of a rack and a rack sleeve. The invention is characterized in that an aligning device is arranged in the rack sleeve; the rack is provided with a stopping ring groove; the aligning device consists of a sliding block, a spring, a stopping ring and a stopping block. When a vehicle is in turning, the spring is compressed, while the vehicle is in aligning, the spring releases actively and generates a force which can be used by the invention for overcoming the damping of the electric-powered steering device to help align, thereby improving the aligning performance; the invention can overcome self-damping without controlling the rotating of the motor and changing the control method, thereby avoiding complex mechanical structure and control method. The invention has simple structure, low cost and power consumption.

The invention relates to a steering return assisting device, a steering mechanism and a vehicle. The steering return assisting device comprises an outer gear (2) fixedly arranged outside a steering column (1) in a sleeving mode, an inner gear (3) arranged outside the outer gear in a sleeving mode, a shell (4) arranged outside the inner gear in a sleeving mode and an elastic element (5), one end ofthe elastic element is connected with the shell, and the other end of the elastic element is connected with the inner gear. One of the outer gear and the inner gear is provided with fixed gear teeth,and the other one is provided with rotatable gear teeth, so that when the steering column rotates in a first direction, the outer gear and the inner gear are in meshing transmission, and when the steering column rotates in a second direction, the outer gear and the inner gear slide relatively. The steering return assisting device of the mechanical structure is provided, so a good return effect can be achieved even under the condition that steering force is small when the vehicle turns at a low speed, a small angle and the like.

The invention discloses a wind driven generator impeller locking disc which comprises a shaft rod, a generator and a shell and is characterized in that the bottom end of the shaft rod is fixedly connected with the top end of the generator, the periphery of the top end of the generator is fixedly connected with the bottom ends of connecting rods, and the top ends of the connecting rods are fixedly connected with the bottom end of a chassis; the periphery of the chassis is fixedly connected with the inner wall of the shell, a round hole is formed in the middle of the chassis, a bearing is installed between the inner wall of the round hole and the shaft rod, a rotary spring is installed in the middle of the shaft rod, the bottom end of the rotary spring is fixedly connected with the top end of the chassis, and the top end of the rotary spring is fixedly connected with the bottom end of the disc. The periphery of the bottom end of the disc is fixedly connected with one end of a lock catch, an abutting block is installed at the top end of the rotating disc and is in threaded connection with a shaft rod, and the top end of the shaft rod is fixedly connected with the bottom end of a fixing block. The fan is simple in structure and is provided with the fan blade aligning device, and the bolts and the slotted holes are conveniently fixed.

The invention relates to a front axle assembly of an automatic driving test target vehicle carrying platform, which comprises a shell, a wheel assembly, a steering assembly and a suspension assembly, wherein the front axle assembly executes steering and braking instructions issued by an upper-layer controller, and steering force is transmitted to wheels through a gear rack steering system of the steering assembly to realize steering motion; the front axle assembly adopts bilateral electromagnetic brake arrangement, and the braking capacity meets the extreme test requirement; the suspension assembly adopts parallel equal-length double-cross-arm arrangement, and the wheel positioning parameters are small in change along with wheel jump; and the front axle assembly is installed in a modular embedded mode, the structural height is extremely low, and the rolling resistance is high. Compared with the prior art, the front axle assembly solves the comprehensive problems of braking force requirements, compactness, high structural strength and the like of an automatic driving target vehicle carrying platform, is matched with other executing mechanisms and target vehicles, and can meet the strict requirements of emergency braking, high-speed collision and rolling and other automatic driving danger test working conditions.

The invention discloses a high-efficiency large-torque mechanical steering gear device, and relates to the technical field of mechanical steering gears. The device comprises a shell, a steering nut isarranged in the position, close to the upper side, in the shell, a first radial bearing is fixedly installed between the left side face of the steering nut and the shell, an input shaft is movably installed in the steering nut from the right side face, a second radial bearing is fixedly installed on the input shaft, the second radial bearing abuts against the right side face of the steering nut,a steel ball is arranged between the input shaft and the steering nut, and a supporting bearing is arranged between the outer surface of the steering nut and the inner wall of the shell. The supporting bearing matches the wall of the shell, the position is limited through a limiting clamping ring, the output torque is increased, the durability is improved, the service life of the steering gear boxis prolonged, a first needle roller bearing matches a second needle roller bearing, the positive efficiency of the steering gear box is greatly improved, and the return performance of the steering gear box is more excellent.