65 results about "Double wishbone suspension" patented technology

The invention relates to an unequal double-wishbone suspension wheel side driving device capable of achieving large-angle steering and belongs to the field of electric automobiles. The unequal double-wishbone suspension wheel side driving device capable of achieving large-angle steering comprises an unequal double-wishbone suspension, a driving motor, a steering motor, a universal transmission shaft, a worm and gear reducer, a bevel pinion, a transmission bevel gear, a bevel gear wheel, a brake caliper, an axle housing and wheels, wherein the driving motor and the steering motor are both fixedly arranged on an automobile frame; the driving motor drives the wheels to rotate through the universal transmission shaft and gear transmission; the bevel gear wheel simultaneously plays the role of a brake disc; and the steering motor achieves steering of automobiles through the universal transmission shaft and the worm and gear reducer; the transmission bevel gear is sleeved on a master pin in empty mode; and a worm gear is connected with the master pin through a flat key. When automobiles steer, mutually independent operation of a driving system and a steering system can be achieved by reasonably controlling the rotate speed of the driving motor. The unequal double-wishbone suspension wheel side driving device capable of achieving large-angle steering not only achieves large-angle steering, but also reduces the unsprung mass of the automobiles, and improves the flexibility of the automobiles and riding comfort.

The invention provides a double-triangular suspension frame wheel leg type all-terrain mobile robot. The robot includes a wheel leg robot body, a radar system arranged on the wheel leg robot body andfour wheel leg robot single legs symmetrically arranged at the front, rear, left and right portions of the wheel leg robot body, wherein each wheel leg robot single leg comprises an actuator, a triangular bracket connected with the actuator, a damping spring connected with the triangular bracket, a double-transverse-arm suspension frame connected with the damping spring, a steering motor connectedwith the double-transverse-arm suspension frame, a wheel leg body connected with the steering motor and a driving wheel which is connected with the wheel leg body and provided with a hub motor; the middle point of each triangular bracket is connected with the wheel leg robot body, and the two ends of each triangular bracket are connected with the corresponding actuator and the corresponding spring separately; each double-transverse-arm suspension frame includes an upper suspension frame control arm and a lower suspension frame control arm, one end of each upper suspension frame control arm and one end of each lower suspension frame control arm are hinged to the side surface of the wheel leg robot body, the other end of each upper suspension frame control arm and the other end of each lower suspension frame control arm are hinged to the corresponding steering motors, and the damping springs are connected with the upper suspension frame control arms. By adopting a four-wheel drive pattern, the robot can run within an angle of 360 degrees in different directions.

The invention provides a drive-by-wire independent steering-driving integrated double wishbone suspension system based on a double crank mechanism. The drive-by-wire independent steering-driving integrated double wishbone suspension system based on the double crank mechanism comprises a wheel steering angle sensor, a worm gear reducer, a servo motor, a bracket, an upper swinging arm, a driving rod, a driving rod ball, a connecting rod, a lower swinging arm, a lower swinging arm ball stud, a hub, a driven rod ball, a steering knuckle, a driven rod, an upper swinging arm ball stud, a PID (Proportion Integration Differentiation) controller and a CAN bus system. The invention is advantaged in that a steering mechanism does not occupy additional space during realizing drive-by-wire four-wheel, the steering error is furthest reduced, the adverse effect of the wheel hop on the working state of a decelerating device when a vehicle runs on a complicated pavement can be effectively decreased, and toe-in interference caused by reverse input can be effectively avoided. As steering wheel signal feedback is also included, the closed-loop control of the system can be realized, accurate steering can be realized and the vehicle steering performance can be very well improved. The excellent effects are extremely helpful for the promotion of the drive-by-wire independent steering-driving integrated double wishbone suspension system in the vehicle industry.

The invention discloses a suspension system and steering system for a distributed driving and independent steering electric automobile. The suspension system and steering system is fixed to an automobile body through an installation support and comprises wheels, a hub motor, a wheel support, a brake, a steering system body and a double-cross-arm suspension system. The steering system body is installed on the installation support of the automobile body, the wheel support is connected with the output end of the steering system, the double-cross-arm suspension system is installed on the wheel support, and the movement of the double-cross-arm suspension system does not interfere with the movement of the steering system body. By means of the suspension system and steering system, the double-cross-arm suspension system with a lateral stabilizer is integrated while each wheel can have large steering angular capability, so that the grounding state of tires is improved, the attachment limit is increased, friction of the tires is reduced, and the side lurch rigidity of the automobile is increased; thus, the control stability is improved, and the whole system is easy to calibrate.

A front wheel suspension structure for a saddle-type vehicle (all terrain vehicle) includes a double wishbone suspension system. The double wishbone suspension system includes a pair of right and left upper arms and a pair of right and left lower arms. The upper arm and the lower arm each include a front arm portion and a rear arm portion, respectively, and each of the upper arm and the lower arm is attached to a side of a body frame at two points. When viewed in a side view, the rear arm portion of the upper arm is located in front of the rear arm portion of the lower arm. A front shock absorber is arranged behind the rear arm portion of the upper arm.

A composite suspension device for torsion bar coil springs comprises two symmetrical suspension devices with double wishbones, wherein each suspension device comprises a suspension support (5), a telescopic shock absorber (4), an upper suspension lever (3) and a lower suspension lever (3), a main flexible element employs a coil spring (1) and a supplementary element uses a torsion bar spring (9). The invention can be used for rear axles of off-road vehicles. The suspension system realizes large travel, heavy load and variable rigidity characteristic, simultaneously reduces processing difficulty of coil springs, decreases shear stress which each elastic element receives in operational process, thereby prolonging the service life of coil springs, increasing reliability of the suspension system and the entire car and decreasing processing and manufacturing costs of the suspension system.

A wheel-leg type all-terrain active / passive attitude adjustment robot comprises a robot body, a radar system arranged on the robot body and four robot single legs symmetrically arranged on the front portion, the rear portion, the left portion and the right portion of the robot body. Each robot single leg comprises an actuator, a tripod connected with the actuator, a damping spring connected with the tripod, a double-wishbone suspension connected with the damping spring, a steering motor connected with the double-wishbone suspension, a wheel leg connected with the steering motor and a drive wheel connected with the wheel leg and provided with a hub motor. The lower angle of each tripod is connected with the robot body, the two upper angles of each tripod are connected with the correspondingactuator and the corresponding damping spring, each double-wishbone suspension comprises an upper suspension control arm and a lower suspension control arm, one end of each upper suspension control arm and one end of the corresponding lower suspension control arm are hinged to the side face of the robot body, the other ends of each upper suspension control arm and the corresponding lower suspension control arm are hinged to the corresponding steering motor, and each damping spring is connected with the corresponding upper suspension control arm. The robot can steer at 360 degrees without a dead angle, and an active / passive attitude adjustment mode of the robot is switched.

The invention relates to an equal-length double-crossarm suspension wheel rim driving device capable of realizing large-angel steering, belonging to the field of electric automobiles. The device comprises an equal-length double-crossarm suspension, a driving motor, a steering motor, a belt wheel with a changeable pitch, a steering belt, a driving belt wheel, a steering belt wheel, a small bevel gear, a large bevel gear, a main pin, a bridge shell, a braking clamp and wheels. The connection lines of the main shaft and upper and lower crossarms and the connection lines of the upper and lower crossarms and an automobile frame hinging point form a parallelogram; the driving motor and the steering motor are both arranged on the connection lines of the upper and lower crossarms and the automobile frame hinging point and fixedly arranged on an automobile frame; the driving motor is used for driving the wheel through belt driving and gear driving; the large bevel gear also serves as a braking disc; the steering motor realizes the steering of an automobile through belt driving; the driving belt wheel and the small bevel gear are both sleeved on the main pin; and the steering belt wheel is connected with the main pin through a flat key. When the automobile steers, the rotating speed of the driving motor is controlled reasonably so that a driving system and a steering system can work independently.

The invention provides an integrated drive-by-wire independent steering system based on a double wishbone suspension. The integrated drive-by-wire independent steering system based on the double wishbone suspension comprises a servo motor assembly, a motor bracket, an upper swinging arm, a lower swinging arm, a spherical hinge, a steering knuckle, a brake disc and a hub bearing assembly, wherein the servo motor is used as a steering power source. The invention is advantaged in that the integration of the suspension and the steering system is realized through combining advantages of the double wishbone independent suspension and the drive-by-wire steering system; a steering linkage system of the traditional steering system is eliminated, interference between the steering linkage system and a suspension guiding linkage system is completely avoided, the steering angle is close to plus or minus 90 degrees through reasonable layout, and zero steering radius in-situ steering is realized in the whole vehicle; as the steering servo motor assembly is placed on a wheel side and a transmission chain for steering motion is short, the steering response is sensitive and the efficiency is high; as the motor and a master pin are integrated, wheel rotation and hop do not interfere with each other and the toe-in interference of the steering transmission chain during the wheel hop is prevented; and the types of key parts are greatly reduced and the mass manufacturing cost is reduced.

A mechanical active suspension system of a vehicle is disclosed. It solves the problems of high price and high maintenance cost of active suspension, and further improves the performance of some aspects of active suspension. The mechanical active suspension system is characterized in that the fixed end of the spring in the suspension is connected with the vehicle body through a screw nut mechanismor a worm gear worm mechanism. The ECU controls the servo motor to drive the nut or worm to rotate so that the screw and the worm wheel drive the swing arm connected with the screw and the worm to generate the lifting and lowering motion with respect to the vehicle body so as to realize the height adjustment of the vehicle chassis. The ECU controls the servo motor to rotate the nut or the worm todrive the screw and the worm wheel to generate the lifting and lowering motion with respect to the vehicle body. Multi-stage spring is used in the suspension to realize the soft and hard adjustment of the suspension. The ECU controls the operation of each motor in real time according to the data fed back by each sensor. By adjusting the lifting and lowering of each independent suspension, it cancounteract the action of turning and tilting, braking nodding and starting and raising the head of the vehicle body. In the unequal-length double wishbone suspension, one wishbone is connected to thebody by an eccentric shaft, and the ECU controls the servo motor to drive the worm gear to drive the eccentric shaft to rotate to adjust the inclination angle between the wheel and the ground.

The invention discloses an integrated wheel edge driving system equipped with an unequal-length double transverse arm suspending frame and capable of reducing the unsprung mass. The integrated wheel edge driving system comprises the unequal-length double transverse arm suspending frame, an integrated driving device, cardan joint transmitting shafts and the like, wherein the integrated driving device is fixed on a vehicle frame and comprises a driving motor and a planet gear reducer. Unequal-height coaxial power transmission is realized by the integrated driving device and a wheel transmitting shaft through the cardan joint transmitting shafts, so that malposition between the integrated driving device and a wheel shaft caused by jump on a rough road can be accepted to a certain extent; during steering of the vehicle, independent operation of the driving system and a steering system can be realized through controlling the rotational speed of the motor and a steering rod. According to the integrated wheel edge driving system disclosed by the invention, not only is the unsprung mass greatly reduced and are the smoothness and the stability of the vehicle improved, but also steering at a certain angle can be realized by a traditional steering method.

The invention relates to a steering driving wheel, and belongs to the field of electric automobiles. The steering driving wheel comprises an unequal length double-cross-arm suspension, a driving motor, a steering motor, a universal transmission shaft, a worm gear reducer, a small bevel gear, a transmission bevel gear, a large bevel gear, a pair of braking calipers and automobile wheels, wherein both the driving motor and the steering motor are fixedly connected to an automobile frame, the driving motor drives the automobile wheels to rotate in a transmission mode through the universal transmission shaft and the gears, and the steering motor achieves steering of the automobile wheels through the universal transmission shaft and the worm gear reducer. When an automobile turns, mutually independent operating of a driving system and a steering system can be achieved through reasonable controlling of rotation speed of the driving motor. While the steering driving wheel achieves large-angle steering and driving of the automobile wheels, unsprung mass of the automobile wheels is further reduced, and flexibility and driving smoothness of the automobile are improved.

The invention aims to provide an upper oscillating arm assembly of an automobile double-wishbone suspension, which has the advantages of light weight, simple structure, low manufacture cost and convenience for installation. The upper oscillating arm assembly of the automobile double-wishbone suspension comprises an upper oscillating arm body provided with a ball pin assembly and is characterized in that two free ends of the oscillating arm body are connected by bolts; the upper oscillating arm body is subjected to punch forming by a single layer of steel plate; the cross section of the upper oscillating arm body is of a groove shape of which the opening faces upwards or downwards; and the opening of the groove shape is gradually reduced to free ends on two ends from the ball pin assembly.The upper oscillating arm assembly of the automobile double-wishbone suspension has the advantages of simple and reasonable structure, light weight, low manufacture cost and convenience for install and is very suitable to apply for low and medium-grade automobiles.

The invention relates to a drive-by-wire four-wheel independent steering system with a steering motor arranged on a double-wishbone suspension swinging arm. The drive-by-wire four-wheel independent steering system comprises the steering motor, a driven shaft, an upper controlling arm, the lower swinging arm and a steering knuckle used for driving a wheel to swerve. The upper controlling arm and the lower swinging arm are connected with a vehicle body; the driven shaft passes the lower swinging arm and is connected with the steering knuckle; the upper controlling arm is connected with the steering knuckle; the steering system further comprises a universal driving device which is arranged between the driven shaft and the steering knuckle; the steering motor is arranged on the lower swinging arm, and the output end of the steering motor is connected with the universal driving device; and the torque output by the steering motor drives the steering knuckle through the universal driving device to drive the wheel to steer. Compared with the prior art, the drive-by-wire four-wheel independent steering system for arranging of the steering motor on the double-wishbone suspension swinging arm has the advantages that independent steering is achieved and movement performance of a suspension is combined.

The invention provides an active adjustment device of a double-wishbone suspension. The active adjustment device comprises a steering knuckle, a steering rocker arm, an upper cross arm and a lower cross arm and further comprises a camber angle adjustment mechanism, a toe angle adjustment mechanism and a control system. The camber angle adjustment mechanism is arranged between the steering knuckleand the upper cross arm, and a first sensor is used for detecting the size of a current camber angle. The control system adjusts the camber angle through the camber angle adjustment mechanism according to the size of the current camber angle. One end of the toe angle adjustment mechanism is connected with the steering rocker arm, and the other end of the toe angle adjustment mechanism is connectedwith a steering knuckle arm. A second sensor is used for detecting the size of a current toe angle. The control system adjusts the toe angle through the toe angle adjustment mechanism according to the size of the current toe angle. The camber angle and the toe angle of the double-wishbone suspension can be dynamically adjusted, and the different requirements for the camber angle and the toe angleunder different working conditions are met.

The invention relates to a wheel-side deceleration driving device of an equal-length double wishbone suspension, which belongs to the field of electric vehicles and comprises a double wishbone suspension, a motor, a synchronous belt, a small belt pulley, a big belt pulley, a small bevel gear, a big bevel gear, an axle housing, a transmission half shaft, a hub supporting member, wheels and the like, wherein one end of an upper cross arm is hinged with a vehicle frame through a rotating pair, the other end of the upper cross arm is hinged with the upper end of the axle housing on an A point through the rotating pair, one end of a lower cross arm is hinged with the vehicle frame through the rotating pair, and the other end of the lower cross arm is hinged with the lower end of the axle housing on a D point through the rotating pair. The B and the C respectively are middle points of a connecting line between hinged points of the upper cross arm, the lower cross arm and the vehicle frame, and the A, the B, the C and the D form a parallelogram. The motor is arranged on a middle point of the B and the C, the small belt pulley is arranged on an E point, the big belt pulley is arranged on an F point, the length between the E and the F stays the same during jumping process of the wheels, and the distance between the two belt pulleys does not change, thereby guaranteeing power to be steadily transported. The motor is fixed on the vehicle frame, thereby increasing select range of motor power, reducing unsprung mass of electric wheels, and effectively increasing controllability and harshness of a finished vehicle.

The invention belongs to the technical field of passenger car parts, and particularly relates to an auxiliary frame obtained through welding hollow cast aluminum and aluminum profiles. The auxiliary frame comprises a left hollow cast body, a right hollow cast body, a front cross beam, a middle cross beam, a rear cross beam, a left front control arm installation support, a left front car body installation hole supporting column, a left rear control arm installation support, a left middle car body installation hole supporting column, a left rear car body installation hole supporting column, a right front control arm installation support, a right front car body installation hole supporting column, a right rear control arm installation support, a right middle car body installation hole supporting column, a right rear car body installation hole supporting column, a front suspension installation support of a power assembly, a left rear suspension installation support of the power assembly and a right rear suspension installation support of the power assembly. The problem that the inblock cast of the large-scale aluminum auxiliary frame is difficult is solved, the arrangement, function and crashworthiness requirements of Macpherson double wishbone suspension on the auxiliary frame are met, and the advantages of high strength, high rigidity, light weight and the like are achieved.

The invention discloses an integrated double-cross arm suspension wheel side electric driving system for a steering wheel. According to the integrated double-cross arm suspension wheel side electric driving system for the steering wheel, a motor shell is fixedly connected with a gearbox shell, and is supported to a vehicle frame through a second elastic hinge to serve as a lower cross arm of a double-cross arm suspension; one end of a connecting rod of the lower cross arm is connected with the gearbox shell through a first rotating hinge; one end of a connecting rod of a steering joint is connected with the steering joint through a third rotating hinge; the connecting rod of the lower cross arm is connected with the connecting rod of the steering joint through a second rotating hinge; one end of an upper cross arm is supported to the vehicle frame through a first elastic hinge; the other end of the upper cross arm is connected with the steering joint through a first spherical hinge; a half-shaft sleeve is machined on the steering joint; a wheel hub is supported to the half-shaft sleeve through a wheel hub bearing; a steering joint arm on the steering joint is connected with a steering tie rod through a second spherical hinge; one end of a universal joint is fixedly connected with the output shaft of a gearbox; the other end of the universal joint is fixedly connected with a half shaft; the half shaft is fixedly connected with the wheel hub; and the wheel hub is fixedly connected a brake rotating piece and a wheel rim. The integrated double-cross arm suspension wheel side electric driving system for the steering wheel has the advantages that the motor shell, the gearbox shell and the lower cross arm of the double-cross arm suspension are integrated, so that the vibration of a motor relative to the vehicle frame is reduced, and the equivalent unsprung weight is light.

The invention discloses a wheel leg type all-terrain mounting platform, which comprises a mounting platform body, a radar system arranged on the mounting platform body and mounting platform single legs arranged at four corners of the bottom of the mounting platform body. The mounting platform single legs include an actuator, a connecting lever, a damping spring, double wishbone suspensions, a steering motor, and wheel legs, the middle point of the connecting lever is connected with the mounting platform body, the inner end is connected with the actuator, the outer end is connected with the topend of the damping spring, the bottom end of the damping spring is connected with the double wishbone suspensions, the inner sides of the double wishbone suspensions are connected with the bottom ofthe mounting platform body, the outer sides are connected with the steering motor, the steering motor is connected with the wheel legs, and the wheel legs are connected with the driving wheels provided with the wheel hub motor. The mounting platform has excellent dynamic ride comfort, and can realize 360-degree dead-angle-free steering by adopting four-wheel drive mode, and can realize driving ineach direction of 360-degree at the same time, and can realize switching of active / passive attitude adjustment mode of the mounted platform.

The invention provides a double wishbone independent suspension used for a wheel hub motor, and relates to the technical field of automobile parts. The double wishbone independent suspension comprisesan upper wishbone and a lower wishbone which are arranged in parallel at an interval, wherein one end of the upper wishbone and one end of the lower wishbone are connected to the upper and lower endsof a steering knuckle through a T-shaped pivot mechanism respectively; the other ends of the upper wishbone and the lower wishbone are connected onto a rigid arm through pivots respectively; the rigid arm is fixedly connected onto a car body; and the steering knuckle is connected with a wheel hub connecting shaft and a steering transmission mechanism. The T-shaped pivot mechanism comprises a transverse shaft and a vertical shaft connected to the middle part of the transverse shaft in an included angle of 80 to 90 degrees with the transverse shaft, the upper wishbone is rotatably connected onto the transverse shaft in a sleeving mode, and the steering knuckle is rotatably connected onto the vertical shaft in the sleeving mode. The double wishbone independent suspension solves the problem that a double wishbone independent suspension in the prior art cannot serve as a drive axle of the wheel hub motor.

The invention relates to a wheel-type electrically driven vehicle of a modular body. The vehicle with a modular structure comprises a frame-type body, a modular replaceable shell and a wheel drive module installed on a frame-type body chassis, wherein the wheel drive module comprises four wheel motors, a double-wishbone suspension and cables. The four wheel motors are respectively connected with four wheels and directly drive the four wheels of the whole vehicle, the wheel motors are connected on a beam of the frame-type body chassis through the double-wishbone suspension, and the cables are used to transmit driving signals. Compared with the prior art, the wheel-type electrically driven vehicle of the modular body has the advantages of a modular and light body structure, a replaceable shell to meet the needs of diverse appearance and the like. Furthermore, with the use of the four-wheel drive mode, distributed drive and modular assembly of the wheel-type electrically driven vehicle of the modular body is easy.

A human-propellable vehicle (1) is described which comprises a chassis (2), and a rear wheel assembly (5) mounted to a rear portion of the chassis. The rear wheel assembly comprises a double wishbone suspension assembly, each wishbone (14, 22) of the double wishbone suspension assembly being coupled to the chassis at first and second coupling points, the second coupling point for each wishbone being closer to the rear of the chassis, and closer to the longitudinal axis of the vehicle, than the first coupling point for that wishbone. By using a double wishbone set up at the rear of the bike it is possible to control weight transfer more efficiently. By providing a second coupling point for each wishbone which is closer to the rear of the chassis, and closer to the longitudinal axis of the vehicle, than the first coupling point for that wishbone, it is possible to utilise a setup without having to adopt a higher seating position and without having to increase the rear wheel track beyond an acceptable width.

The present invention relates to a four-wheel independent steering system with a steering motor mounted on a double wishbone suspension knuckle. The four-wheel independent steering system comprises the steering motor, an upper swing arm, a lower swing arm, and a knuckle for driving wheels to steer. The upper swing arm and the lower swing arm are connected with a body. The steering system also comprises a motor bracket. The motor bracket is connected with the knuckle by a thrust bearing, the steering motor is fixed on the motor bracket, and the output shaft of the steering motor is connected with the knuckle by a key, the upper swing arm is connected with the motor bracket through a hooke joint, and the lower swing arm is connected with the knuckle through a spherical hinge. Compared with the prior art, the advantages of the double wishbone independent suspension and a wire steering system are combined, good suspension kinematic characteristics are achieved, a steering servo motor assembly is arranged on the wheel rim, so that the integration of the suspension and the steering system is realized, and the integration level is high.

The invention provides a method and device for analyzing forward-looking geometrical movement of a suspension. The method comprises the following steps: establishing a model of a double-wishbone independent suspension first side in a local coordinate system, inputting the rotation angle of an active arm, and outputting the location of each point and the wheel jump; converting the location of each point in the local coordinate system to a geodetic coordinate system to obtain a double-wishbone independent suspension model; receiving the input wheel jump, and calculating the rotation angle of the active arm and the location of each point of the double-wishbone independent suspension first side; and calculating the forward-looking geometrical performance parameter of the double-wishbone independent suspension model. According to the method provided by the invention, the double-wishbone suspension is simplified from a three-dimensional space to a two-dimensional plane for analysis, and the simplification meets the computational accuracy requirements of the general forward-looking geometrical performance parameter and can be applied to the early design and parameter optimization of this type of suspensions. By simplifying the double-wishbone independent suspension of automobiles, the forward-looking geometrical performance parameter of the suspension can be real-timely calculated in a wheel jump adjusting process, and the efficiency and quality of the geometrical arrangement of the suspension in the initial development stage can be improved.

An arm material for an upper arm or a lower arm is provided which constitutes a double wishbone suspension or the like of an automobile and which has a flat, hollow, closed cross-sectional shape and enables further decreases in size, decreases in weight, and increases in strength.An arm material for an automobile suspension has a body made from a parts material made by metal. The parts material made by metal has a flat, hollow, closed cross-sectional shape having a pair of opposing long sides and is formed from a single member in its lengthwise direction. The body has at least a first bent portion which is bent in a plane roughly parallel to the pair of long sides.

The invention discloses a vehicle body double-wishbone independent suspension roll prevention and control method, and a structure. According to the structure, hinge points where a left lower wishboneand a right lower wishbone of a common double-wishbone suspension are fixed to a vehicle frame are changed into movable hinge points which are connected with a motor swing arm through a rotating pin,so that the connecting points can move up and down to drive shock absorber lower supporting points on the left and right lower cross arms to move up and down. Upper supporting points of the shock absorbers are connected with a carriage, a frame in the bearing type vehicle body is integrated with the carriage, the left-right height of the carriage on the cross section can be changed when the uppersupporting points of the left-right shock absorbers move up and down, and the purpose of changing the roll state of the carriage is achieved. And a control system disclosed in the invention adopts a classic feedback control structure, is easy to implement and good in control effect, and can effectively improve the overlarge side inclination prevention capacity and comfort of the vehicle.

The invention aims to provide an upper oscillating arm assembly of an automobile double-wishbone suspension, which has the advantages of light weight, simple structure, low manufacture cost and convenience for installation. The upper oscillating arm assembly of the automobile double-wishbone suspension comprises an upper oscillating arm body provided with a ball pin assembly and is characterized in that two free ends of the oscillating arm body are connected by bolts; the upper oscillating arm body is subjected to punch forming by a single layer of steel plate; the cross section of the upper oscillating arm body is of a groove shape of which the opening faces upwards or downwards; and the opening of the groove shape is gradually reduced to free ends on two ends from the ball pin assembly. The upper oscillating arm assembly of the automobile double-wishbone suspension has the advantages of simple and reasonable structure, light weight, low manufacture cost and convenience for install and is very suitable to apply for low and medium-grade automobiles.

The invention belongs to the technical field of automobile steering devices and particularly relates to an independent steering device for a rail-mounted four-wheel-drive electric automobile. The independent steering device comprises an annular component, a main steering base frame and a hub assembly, wherein the main steering base frame is linked with the annular component in a sliding manner, amain steering mechanism is arranged on the main steering base frame, the main steering base frame can be driven to slide along the annular component by the main steering mechanism and is linked with the hub assembly through a damping assembly; and the hub assembly comprises an auxiliary steering mechanism and a rotatable hub, the hub is linked with the auxiliary steering mechanism, and the hub canrotate through the auxiliary steering mechanism. According to the independent steering device, the problems of independent steering, sensitivity and smoothness of the electric automobile are solved,the structures including a steering transverse tie lever, a steering node arm and the like of a traditional steering system are omitted, an auxiliary steering motor drives an auxiliary steering gear to drive a steering part so as to realize small steering of vehicle wheels, and the main steering motor drives the whole double wishbone suspension frame system to rotate so as to realize large steering.