82results about How to "Guaranteed ride comfort" patented technology

The invention provides a self-adaptive cruising longitudinal adjustment control method and system of a vehicle. The method includes the steps of periodically obtaining the target acceleration and actual acceleration of the vehicle according to a preset period, calculating the acceleration difference value between the target acceleration and the actual acceleration, calculating the original outputtorque of a proportional integer (PI) controller according to the acceleration difference value, conducting gradient limiting treatment and filtering treatment on the original output torque to obtainthe expected output torque, and determining the target torque for being inputted to a motor controller and the target hydraulic pressure intensity for being input to a brake controller according to the expected output torque and the maximum recovery torque of the vehicle. According to the method, by introducing the variable-parameter control and the gradient limiting treatment and filtering treatment, the riding comfort of the vehicle is ensured; motor recovery is conducted as much as possible when the capacity of a motor system is sufficient, compensation is conducted through hydraulic brakewhen the capacity of a motor is insufficient, and economy is ensured.

The invention relates to the technical field of vehicle chassis, and discloses a steering and roll device of a vehicle and a roll control method. The steering and roll device of the vehicle is composed of a roll mechanism and a steering mechanism, a certain angle is formed between the left and right steering arms and the left and right knuckles, which are fixedly connected with each other, the twomechanisms share the body and the main shafts of the left and right steering knuckles. The small left steering arm and the large left steering arm rotate relative to the axis of each arm self-adaptively. The small right steering arm and the large right steering arm rotate relative to the axis of each arm, the independent control of the vehicle steering and body roll can be achieved, steering androll, independent roll or independent steering can be achieved during the driving process of the vehicle. The wheelbase of vehicle does not change. The vehicle body rolls when the method is applied tothe steering of the vehicle, so that the vehicle automatically rolls at a certain angle to resist centrifugal force or overturning force when steering or driving on an inclined road, so as to maintain a stable driving attitude.

The invention aims to provide a fuzzy control method of an automobile nonlinear active suspension system. The method includes the following steps that A, an active suspension system model is established, the state control expectation of the active suspension system is preset, and fractional order differential of a control error signal is defined; B, a fuzzy controller is designed, the control error signal and the fractional order differential of the control error signal are adopted for the fuzzy controller to serve as input variables, and the suspension control force serves as controller output; C, road impact load simulation is conducted on the active suspension system model under the action of the fuzzy controller, and the order parameter of the fractional order differential of the control error signal is determined according to a comprehensive performance index function; D, the control error signal and the fractional order differential of the control error signal serve as the input variables of the fuzzy controller, the output control force of the fuzzy controller is obtained, and control over the actual active suspension system is finished. By means of the fuzzy control method, the problems that by means of an existing technical scheme, scale factors and quantifying factors restrain one another, and the calculated quantity is large are solved, and the fuzzy control method has the advantages of being accurate in control and efficient in calculation.

The invention provides a method and a device for controlling failure of an input shaft speed sensor of an auto mechanical transmission (AMT). When the input shaft speed sensor is in failure, an analogue value very approximate to an actual input shaft speed is calculated, and then the slip of a clutch is calculated according to the analogue value so as to obtain a rational engagement speed for the clutch; therefore, the clutch can work under a rational working condition, and a potential safety hazard is avoided for a vehicle.

In order to suppress postural changes due to pitching movement occurring when a vehicle is braking, the disclosed pitching control device for an electric vehicle and can prevent deceleration discontinuity occurring at the moment when a vehicle stops by means of appropriate control of the vehicle braking force, can effectively control the pitching movement of the vehicle, and can increase stability and controllability and maintain riding comfort for passengers, even if there are substantial changes in travelling resistance due to road surface gradient, or substantial changes in vehicle weight due to an increase or decrease in drivers or load. The disclosed pitching control device for an electric vehicle implements control which suppresses postural changes in the electric vehicle which are generated by the pitching movements of said electric vehicle. When the electric vehicle is stopped, control is carried out such that a braking / driving torque command value outputted to a drive motor for driving the electric vehicle, is a torque which corresponds to travelling resistance, said torque being a value resulting from the power required to maintain a state wherein the electric vehicle is stopped on a road surface having gradient, being converted into the driving motor torque.

The invention discloses a suspended type monorail transit track beam, belongs to the technical field of rail traffic and aims at providing the suspended type monorail transit track beam. By improvingthe vibration absorbing performance of the suspended type monorail transit track beam, the train running comfort is improved. The suspended type monorail transit track beam comprises a track beam topplate, track beam web plates and track beam bottom plates, wherein the track beam web plates are arranged on the left and right sides of the track beam top plate, and the track beam bottom plates arearranged on the internal side walls of the track beam web plates; vibration absorbing rubber pads are arranged on the track beam bottom plates; running rails are arranged on the vibration absorbing rubber pads; and the running rails are connected to the track beam bottom plates through fastener systems. The suspended type monorail transit track beam is applicable to the suspended type monorail transit track beams.

The invention discloses a double-wishbone front-suspension system applied to driving of an inner rotor hub motor. The double-wishbone front-suspension system comprises a steering knuckle, an upper control arm, a lower control arm, a shock absorber spherical hinge lower supporting arm, a spring damper assembly, and the inner rotor hub motor. The steering knuckle is provided with an upward extendingsupporting arm, the upper control arm is hinged to the top end of the supporting arm to form a first hinge point, and the lower control arm is hinged to the lower end of the steering knuckle to forma second hinge point. The shock absorber spherical hinge lower supporting arm comprises a hollow cylinder with a side opening in one side and a rectangular flat plate vertically placed with the hollowcylinder, wherein the extended end of the rectangular flat plate is connected with the middle part of the supporting arm through a ball head pin to form a third hinge point. The upper end of the spring damper assembly is supported on a vehicle body, and a cylinder barrel at the lower part of the spring damper assembly is fixed in the hollow cylinder, the inner rotor hub motor is matched with thehollow cylinder of the steering knuckle, wherein the third hinge point is located on a connecting line between the first hinge point and the second hinge point. The double-wishbone front-suspension system solves the problem of interference of the wheel hub motor on the arrangement of suspension components and various components during wheel steering and up and down movement.

The invention discloses a chassis system of an electric wheel automobile and an optimization method of the chassis system. The chassis system comprises a differential steering module, a differential brake module and an active suspension module. The differential steering module comprises a steering wheel torque angle sensor, a gear-rack steering gear, two hub motors, a vehicle speed sensor, two wheel speed sensors, a yaw velocity sensor and a differential steering control ECU. The active suspension module comprises an elastic element, a damping element, a force generator and a guiding mechanism. The differential brake module comprises a brake pedal position sensor and a differential brake control ECU. Under a steering / braking working condition, the chassis system is optimized based on an NSGA-II algorithm with the steering road sense, the steering sensitivity and the suspension smoothness as performance indexes and parameters of the three modules of the chassis system as optimization variables, so that the automobile smoothness is guaranteed while the good steering road sense and steering sensitivity are obtained by the system, and accordingly the overall comprehensive performance of the chassis system of the electric wheel automobile is improved.

The invention discloses a combined type interconnected air suspension in a vehicle air suspension system and an interconnection mode control method thereof. On the basis of a traditional interconnected air suspension, transverse interconnected pipelines, longitudinal interconnected pipelines and diagonal interconnected pipelines are added, interconnection states are achieved through air springs without absorbers, an electromagnetic valve is added into each interconnected pipeline, and five modes of non-interconnection, transverse interconnection, longitudinal interconnection, four-corner interconnection and diagonal interconnection are achieved. On the one hand, contradiction of control stability and ride comfort of a vehicle is further relieved through the four interconnection modes of non-interconnection, transverse interconnection, longitudinal interconnection and four-corner interconnection and the capacity for adjusting the roll stiffness and the pitching stiffness of the air suspension, and on the other hand, by means of the diagonal interconnection mode, the ride comfort can be improved to a certain extent and certain control stability is ensured when the vehicle runs at a high speed, so that the sensitivity requirement of a control system is lowered, and the ride safety is ensured.

The invention discloses an elevator device, which can prevent or reduce the ear plugging feeling and the earache without a special device and without greatly reducing the running efficiency. The elevator device is provided with a control device (10) that responds to the elevator cage calling (7a) and the elevator hall calling (8a) to perform the logging-on of the target floor, and outputs the running order to a driving device (5) so as to accelerate the elevator cage (1), or to run the elevator cage at a given speed, or decelerate the elevator cage, so as to finally reach the target floor. The control device (10) calculates the lifting distance from the starting floor to the target floor; when the lifting distance exceeds a specified value, the acceleration or the deceleration is determined in the way that the acceleration or the deceleration of the elevator cage (1) is determined to be smaller if the lifting distance is longer, so as to reduce the atmosphere variation rate inside the elevator cage, and to prevent or reduce the ear plugging feeling and the earache of the passengers, thereby facilitate the operation of the elevator cage at a rating speed, and preventing the reduction of the running efficiency.

The invention belongs to the technical field of automobile energy conservation, and particularly relates to an automobile vibration energy recovery system and a control method. The automobile vibration energy recovery system is used for recovering energy consumed during vibration in the automobile driving process, and converting mechanical energy produced during vibration into recyclable electric energy. However, energy produced during vibration of an automobile is scattered, and the recovery efficiency is low if the energy is directly recovered into electric energy. By means of the automobile vibration energy recovery system, mechanical energy is firstly converted into pneumatic energy so that scattered energy can be concentrated, and then the pneumatic energy is concentrated and converted into electric energy; through the control over the energy releasing moment of the pneumatic energy, an electric generator can work within a high generating capacity range all the time, and then the energy recovery efficiency is improved.

The invention discloses a ballast track laser intelligent track lifting and lining system. The ballast track laser intelligent track lifting and lining system comprises a track lifting and lining tamper (1) and is characterized by further comprising an integrated full-route measurement device, the full-route measurement device comprises a laser transmitting device (4) and an image receiving device (5), the image receiving device (5) is arranged on a front end image receiving trolley (7), and the laser transmitting device (4) is arranged on a laser transmitting movable trolley (2) in a distance. The image receiving device (5) is provided with a two-dimensional automatic tracking mechanism. A construction method includes the steps that route geometrical shape parameters are input, and track lifting and lining are conducted; each time the ballast track laser intelligent track lifting and lining system advances by a set distance, an electrical control system collects front end lifting and lining quantity data, a gva system outputs track lifting and lining quantity data control operation of an operation position, and the gva system feeds back track lifting and lining quantity data of an operation process. By means of the ballast track laser intelligent track lifting and lining system and the construction method, ballast track accurate track lifting and lining measurement workloads are greatly reduced, construction accuracy is improved, the advantages of the full-route measurement system and a large track maintenance machine are given into full play, and the problem of man-made errors occurring in the connection between the measurement procedure and the track lifting and lining construction procedure is thoroughly solved.

The present invention provides a pneumatic tire, which ensures the rock performance and improves the cutting resistance. A pneumatic tire 1 comprises a sidewall portion 3 provided with a side protector 9 protruding from a contour line S of the sidewall portion. The side protector 9 is composed of first protector blocks 11 arranged in the tire circumferential direction at intervals and second protector ribs 12 connecting therebetween. In a tire meridian section including each second protector rib 12, the second protector rib 12 has a triangular cross-sectional shape having an apex 13 at which the protruding height from the contour line S becomes maximum, and radially outer and inner oblique sides 14 and 15 extending radially outwardly and inwardly from the apex 13. Each of the radially outer and inner oblique sides 14 and 15 is a concave circular arc whose center is positioned outside the tire.

The invention discloses an elevator arrangement structure. The elevator arrangement structure comprises a traction machine (1), an elevator car (3), a pair of elevator car diversion sheaves (4), a counterweight (6), a counterweight diversion sheave (7), a pair of elevator car guide rails (8), a pair of counterweight guide rails (9) and a traction rope (10), wherein the elevator car diversion sheaves (4) are arranged on the left side and the right side of the elevator car (3) respectively. The pair of elevator car guide rails (8) and the pair of counterweight guide rails (9) are located on the same side of the elevator car (3). The center connecting line of the pair of elevator car guide rails (8) is parallel to the center connecting line of the pair of counterweight guide rails (9). The traction rope (10) intersects with the center connecting line of the pair of elevator car guide rails (8) on the extension line of the connecting line connecting the pair of elevator car diversion sheaves (4), so that an acute angle which is 60-90 degrees is formed. Compared with the prior art, the elevator arrangement structure is more compact, the utilization rate of the space of a shaft is increased, the elevator car operates more smoothly, and passengers can take the elevator car more comfortably.

The invention relates to a multi-energy-source fuel cell vehicle thermal management system and a control method thereof. The fuel cell vehicle thermal management system comprises a fuel cell subsystem, a storage battery subsystem, a super capacitor subsystem, a heat exchange subsystem and a post-processing subsystem. The control method comprises the steps of detecting the output current and the output power of each energy source, the cooling liquid outlet temperature of each energy source and the heat required by a passenger compartment, and switching the control method of the heat managementsystem among an extremely cold mode, a small cycle, a medium cycle, a large cycle and an extremely hot mode according to the parameters. In each mode, the thermal management system controller realizesthe optimal efficiency of the whole power source part by controlling the flow of the cooling liquid passing through each subsystem, and the quick response of the whole power source part needs to be considered in a low-temperature environment, so that the economy of the fuel cell vehicle and the quick response performance in the low-temperature environment are improved.

The invention discloses a vehicle-mounted intelligent child seat and a control method thereof, and relates to the field of intelligent seats, the child seat comprises a seat adjusting assembly, a temperature adjusting assembly, a sensor assembly, a pressure sensing assembly and a seat controller, and the seat adjusting assembly comprises an angle adjusting motor used for adjusting the angle of a seat backrest and a rotation adjusting motor used for adjusting the rotation angle of the seat; the temperature adjusting assembly comprises a backrest temperature adjusting piece used for adjusting the temperature of the seat backrest and a cushion temperature adjusting piece used for adjusting the temperature of a seat cushion; the sensor assembly comprises a seat backrest temperature sensor usedfor monitoring the temperature of the seat backrest and a seat cushion temperature sensor used for monitoring the temperature of the seat cushion; and the pressure sensing assembly comprises a pressure sensor used for sensing pressure on the seat cushion. According to the child safety seat, the sitting comfort of a child is guaranteed, and meanwhile the convenience of seat adjustment is improved.

The invention relates to a strong-robustness self-adaptive driving antiskid control method used for a hub motor driven electric vehicle and capable of improving acceleration comfort. Influence of tirerelaxation characteristics during design is fully considered, and a regional pole assignment algorithm is used to assign poles near a real axis to reduce longitudinal jitter of acceleration during intervention of a driving antiskid system; a segmented robust control method is adopted to ensure the robustness of a controller when the working condition changes, and a gain scheduling algorithm is used to ensure the adaptability of the controller at any vehicle speed; the anti-skid method provided by the invention has the advantages that the robustness is high, adaptability to working condition is high, the stability of anti-skid control during running at any vehicle speed with change of road adhesion and vertical load can be ensured, the smoothness requirement of the vehicle during intervention of driving anti-skid control is met, longitudinal oscillation of vehicle body acceleration is reduced, and the riding comfort during vehicle acceleration is improved.

The invention discloses an electro-hydraulic integrated type self-energy supplying active suspension actuator which comprises an actuator main body and an actuator controller, wherein the actuator main body comprises a piston barrel, a piston, an upper piston rod, a lower piston rod, an upper lug ring, a lower lug ring, an upper piston barrel end cover, a lower piston barrel end cover, an upper sleeve, an upper guide base, an upper oil seal, a first sealing ring, a lower sleeve, a lower guide base, a lower oil seal, a second sealing ring and a hydraulic oil; a check valve set, a hydraulic motor module and a brushless direct current motor are embedded into the piston; the check valve set comprises a flow valve, a compression valve, a compensation valve and a rebound valve; the hydraulic motor module comprises a hydraulic motor shell, a shaft sleeve, a first gear, a second gear and a third gear. The invention also discloses a control method for the electro-hydraulic integrated type self-energy supplying active suspension actuator. The electro-hydraulic integrated type self-energy supplying active suspension actuator is novel and reasonable in design, convenient in realization and low in cost; the suspension actuator can be under the optimal vibration attenuation state; the driving smoothness and the operation stability of the vehicle can be more effectively promoted.

The present invention provides a self-balancing table assembly. The self-balancing table assembly is set in an electric seat. The electric seat is provided with: a motor that rotates under the drive of the motor and drives the seat back to realize angle adjustment. The synchronizing rod, and the table board arranged on the back of the seat back through a table board rotating shaft, the self-balancing table board assembly includes: a gear box mechanism, including: a gear box housing, assembled in the gear box housing and being driven by the synchronizing rod A transverse bevel gear that penetrates axially, a longitudinal bevel gear that meshes with the transverse bevel gear; a worm gear mechanism, including: a worm gear box housing, a worm gear that is concentrically assembled with the table rotation axis, and a worm that engages with the worm gear; and connecting the longitudinal Flexible shafts for bevel gears and worms. The present invention is based on the existing electric seat, in which a gear box mechanism, a flexible shaft and a worm gear mechanism are added to provide an automatic seat that can automatically follow the change of the inclination angle of the backrest and adjust the inclination angle of the table so that it is always parallel to the floor. Balance table assembly.

The invention discloses an external variable-cross-section balanced ventilation system for rapid trains. The external variable-cross-section balanced ventilation system comprises an air-conditioning unit, a variable-cross-section main air supply channel, at least one secondary air supply channel and an air return channel, wherein the variable-cross-section main air supply channel is arranged on a longitudinal central line of a train body, and one end of the air supply channel is connected with an exhaust end of the air-conditioning unit; the secondary air supply channels are arranged on two longitudinal sides of the main air supply channel and are provided with at least one air supply opening; the end part of the air return channel is connected with an air inlet end of the air-conditioning unit, and the air return channel is provided with at least one air return opening; the secondary air supply channel is connected with the main air supply channel through a spiral air pipe; and the secondary air supply channel and the air return channel are communicated with areas to be supplied with air in carriages respectively through the air supply opening and the air return opening. The external variable-cross-section balanced ventilation system has the beneficial effect that in a long and narrow carriage, because the length of the main air supply channel and the length of the secondary air supply channel are equal to the length of the areas to be supplied with the air and a single-pore-plate regulating device is arranged on a connecting part between the spiral air pipe and the main air supply channel, equivalent air is ensured to be supplied to various areas, so that the uniformity in air supply is enhanced and the traveling comfortableness is guaranteed.

Provided is a tire / wheel assembly with which durability during run-flat travel is improved to at least the level in the prior art. The tire / wheel assembly is obtained by providing a run-flat support 3to the inside of a tread part of a pneumatic tire 2, and is characterized in that: the run-flat support 3 comprises a foam; the height h of the run-flat support is at least 1 / 2 of the height H of theinner cavity of the pneumatic tire 2; when the internal pressure of the pneumatic tire is higher than a prescribed air pressure, the run-flat support 3 is not in contact with a rim 1 of a wheel, andside parts 5 and the inner circumferential surfaces of bead parts 6 of the pneumatic tire; and when the internal pressure of the pneumatic tire 2 is equal to or less than the prescribed air pressure,the inside of the run-flat support 3 in the radial direction of the tire is in contact with the outer circumference of the rim 1 of the wheel and / or the inner circumferential surfaces of the bead parts 3 of the pneumatic tire 2.

The invention discloses a suspension type car anti-impact seat. The suspension type car anti-impact seat comprises a vertical stand column fixed to a bottom plate of a compartment, a horizontal supporting rod fixed to the stand column, a seat body with a backrest being hinged to the end of the supporting rod, a pair of top pulleys fixed to the inner top wall of the compartment, bottom pulleys fixed to the bottom plate of the compartment, a hoisting rope and a tensioning rope. One end of the hoisting rope is fixed to one end of the top of the backrest of the seat body and sequentially winds across the pulleys, the other end of the hoisting rope is fixed to the other end of the top of the backrest of the seat body, and the hoisting rope is tensioned. The bottom of the tensioning rope is connected with the bottom plate of the compartment, and the top of the tensioning rope is fixed to a cushion of the seat body and tensions the cushion of the seat body downwards. The hoisting rope sequentially winds across one top pulley, the bottom pulleys and the other top pulley. The suspension type car anti-impact seat can effectively relieve injury to the bodies of passengers in the compartment when a car is impacted in a landmine explosion accident.

The invention discloses a crawler-type high-efficiency spraying vehicle, which includes a vehicle frame, the bottom of the vehicle frame is movably connected with a walking crawler, the left side of the top of the vehicle frame is fixedly connected with an engine, and the top of the vehicle frame is located at The right side of the engine is fixedly connected with a hydraulic rod, the top of the hydraulic rod is fixedly connected with a seat, the top of the vehicle frame is fixedly connected with a strut on the right side of the seat, and the top of the strut is fixedly connected with a control panel. The present invention uses a control panel, a ton bucket, a bearing, an electric telescopic rod, a first motor, a driving gear, a driven gear, a base, a water pump, a first hose, a second hose, a spray pipe, a second motor, and a transmission rod. Used in conjunction with the stirring blade, it can not only adjust the angle of spraying, but also can stir the liquid medicine inside the ton bucket while spraying the medicine, so that the medicine will not settle, which improves the efficiency of spraying medicine and ensures the spraying effect. Effect.

The invention discloses an acceleration control method of an electric vehicle, and relates to the technical field of new energy vehicles, and the acceleration control method comprises the following steps: S1, the vehicle is selected to enter a power mode or an economic mode according to the accelerator opening A, the current vehicle speed V and the current acceleration a in the driving process ofthe vehicle; s2, the acceleration is not limited when the power mode is entered; and S3, when the vehicle enters the economic mode, the full-speed range of the vehicle is divided into a plurality of vehicle speed intervals, acceleration limit values are set in the vehicle speed intervals, and the output torque of a motor is controlled according to the acceleration limit value in the vehicle speedinterval where the current vehicle speed V is located so as to realize segmental limitation of the acceleration. When the vehicle enters the economic mode, the full-speed range is segmented, and the acceleration limit value of each segment is set, so that the acceleration of the vehicle is gentler, the overall performance is more excellent, the riding comfort of people is fully guaranteed, and thesafety and economy of the vehicle are effectively improved.

The invention aims to provide a fuzzy control method of an automobile nonlinear active suspension system. The method includes the following steps that A, an active suspension system model is established, the state control expectation of the active suspension system is preset, and fractional order differential of a control error signal is defined; B, a fuzzy controller is designed, the control error signal and the fractional order differential of the control error signal are adopted for the fuzzy controller to serve as input variables, and the suspension control force serves as controller output; C, road impact load simulation is conducted on the active suspension system model under the action of the fuzzy controller, and the order parameter of the fractional order differential of the control error signal is determined according to a comprehensive performance index function; D, the control error signal and the fractional order differential of the control error signal serve as the input variables of the fuzzy controller, the output control force of the fuzzy controller is obtained, and control over the actual active suspension system is finished. By means of the fuzzy control method, the problems that by means of an existing technical scheme, scale factors and quantifying factors restrain one another, and the calculated quantity is large are solved, and the fuzzy control method has the advantages of being accurate in control and efficient in calculation.

The invention provides a top-layer vehicle body attitude control method based on pitching rolling force compensation, which belongs to the technical field of vehicle chassis control. According to thevehicle body posture control method, whether the ideal damping force is within the effective damping range which can be provided by a shock absorber or not is judged through a suspension controller, the ideal damping force exceeding the effective damping range of the shock absorber is corrected, and the state of the acceleration is judged through a logic threshold value control method; and on thebasis, distribution calculation of a pitching force weight coefficient and a rolling force weight coefficient is carried out, so that the ideal damping force is always in the effective range providedby the damping force of the shock absorber. The problem of vehicle body posture deterioration in the vehicle driving process is solved, and the riding comfort and safety are improved.

The invention discloses a chassis system of an electric wheel automobile and an optimization method of the chassis system. The chassis system comprises a differential steering module, a differential brake module and an active suspension module. The differential steering module comprises a steering wheel torque angle sensor, a gear-rack steering gear, two hub motors, a vehicle speed sensor, two wheel speed sensors, a yaw velocity sensor and a differential steering control ECU. The active suspension module comprises an elastic element, a damping element, a force generator and a guiding mechanism. The differential brake module comprises a brake pedal position sensor and a differential brake control ECU. Under a steering / braking working condition, the chassis system is optimized based on an NSGA-II algorithm with the steering road sense, the steering sensitivity and the suspension smoothness as performance indexes and parameters of the three modules of the chassis system as optimization variables, so that the automobile smoothness is guaranteed while the good steering road sense and steering sensitivity are obtained by the system, and accordingly the overall comprehensive performance of the chassis system of the electric wheel automobile is improved.

The invention discloses a control arm bushing and a vehicle with the same. The control arm bushing comprises an outer skeleton, an inner skeleton and a rubber body arranged between the outer skeleton and the inner skeleton, wherein the inner skeleton or the outer skeleton is a rolling bearing. The control arm bushing disclosed by the invention adopts the rolling bearing type inner skeleton or outer skeleton, so that when a control arm rotates relative to an accessory vehicle frame, the torque cannot be applied to the rubber body in the control arm bushing. Therefore, the control arm bushing mainly buffers the relative upward and downward movement of the control arm and the accessory vehicle frame, and does not need to buffer the relative rotation. When the comfort of passengers is basically maintained, and the bearing stress of the control arm bushing is greatly decreased, so that the service life of the control arm bushing is greatly prolonged.

The invention discloses a rear-row safety belt structure, and relates to the field of automobile safety, the rear-row safety belt structure comprises a lock catch assembly, a retractor assembly and a guide assembly.The lock catch assembly comprises a lock catch mounting support located in an automobile rear side wall interior trimming panel and a lock catch mounting plate located above the lock catch mounting support; a safety belt outlet is formed in the upper portion of the rear side wall interior trim panel. The retractor assembly comprises a retractor mounting support and a rear-row safety belt retractor mounted on the retractor mounting support, and the retractor mounting support is located behind the lock catch mounting support and a rear-row seat backrest of the automobile. The guide assembly comprises a safety belt guide frame assembly arranged above the lock catch mounting plate, and one end of a safety belt braid contained in the rear-row safety belt retractor bypasses the safety belt guide frame assembly and penetrates out of a safety belt outlet. The width of the rear-row seat can be effectively increased, and therefore the riding comfort of rear-row passengers is guaranteed.