200results about How to "Improve handling stability" patented technology

The invention relates to the technical field of force feedback handles, in particular to a remote surgical robot control system based on a force feedback handle and a control method thereof. The method comprises the following steps: carrying out multi-dimensional force data acquisition on an end effector of the surgical robot, and carrying out contact force size, direction and time sequence feature extraction to obtain multi-dimensional force feature data; performing surgical operation safety baseline analysis according to the multi-dimensional force feature data to generate surgical operation safety baseline data; performing dynamic force feedback threshold calculation according to the surgical safety operation baseline data to obtain force feedback threshold range data; and performing adaptive compression processing on different force feedback signals according to the force feedback threshold range data to obtain dynamic force feedback control parameters. Through real-time control instruction optimization and a closed-loop feedback strategy, the system can quickly respond to an operation intention, early warning is carried out on potential risks, and it is ensured that the operation process is safer and more reliable.

The invention provides a torque control method, a vehicle and a computer readable storage medium. The torque control method comprises the steps that whether the vehicle is in a ramp running condition or not is judged; if yes, obtaining a target torque adjustment coefficient of each wheel of the vehicle and the maximum available torque of each wheel; obtaining a target output torque corresponding to each wheel according to the maximum available torque of each wheel and the target torque adjustment coefficient of each wheel; and distributing torque to the corresponding wheels according to the target output torque of each wheel. According to the method, the slip rate of each wheel of the vehicle is changed within an acceptable range, accurate control over the slip rate of each wheel of the vehicle is achieved, the problem that the stability of vehicle operation is affected due to large fluctuation of the slip rate is solved, the vehicle operation stability is enhanced, each wheel is kept at the target output torque, and the service life of the vehicle is prolonged. Therefore, vehicle kinetic energy waste is effectively reduced, and the endurance mileage of the vehicle is increased.

The invention discloses a vehicle roll control method, device and equipment and a storage medium, relates to the technical field of vehicle roll control, and discloses a vehicle roll control method which comprises the steps that the current vehicle speed and the preset moment are obtained; when it is detected that the vehicle meets the roll control condition, the road curvature is calculated based on the preset moment, and the turning radius is obtained according to the road curvature; according to the roll control condition, the current vehicle speed and the turning radius, a target damping coefficient and / or a target suspension height are / is obtained; and according to the target damping coefficient and / or the target suspension height, the suspension damping and / or the suspension height of the vehicle are / is adjusted, and heeling control over the vehicle is completed. By calculating the road curvature and adjusting the suspension damping / height, vehicle roll control is achieved, and the driving stability is improved.

The present invention provides a treatment system for oily wastewater in methanol to olefins products, the treatment system comprises an oil separator, a clarification tank, a filter, a coalescer and a clean water tank which are sequentially connected through pipelines, the oil separator is provided with a water inlet, and the clean water tank is provided with a water outlet; wherein, the inner cavity of the oil separator and the clarification tank is provided with a plurality of partitions arranged at intervals from each other, the partitions divide the inner cavity of the tank into a plurality of reaction chambers, the partitions are provided with connecting ports to connect the reaction chambers, an oil bag is provided in each cavity of the oil separator, and a dosing device is provided in the cavity of the clarification tank to add drugs thereto. In view of the characteristics of methanol to olefin oily wastewater, the present invention treats floating oil, solid attached oil, suspended matter and emulsified oil separately, and modifies the wastewater from three phases of oil, water and solid into two phases of oil and water, thereby reducing the difficulty of treating the oily wastewater and improving the treatment stability of the oily wastewater.

The invention discloses a high-integration full-active electromechanical suspension actuator which comprises an electric driving mechanism, a motion conversion mechanism and a basic damping mechanism, and the output end of the electric driving mechanism is in transmission connection with the vibration output end of the motion conversion mechanism through a power transmission mechanism in a rotating motion mode. The input end of the basic damping mechanism is in transmission connection with the power transmission mechanism; the motion conversion mechanism achieves mutual conversion between linear motion and rotary motion, the linear motion end of the motion conversion mechanism serves as a vibration input end, the rotary motion end of the motion conversion mechanism serves as a vibration output end, and main power is provided for vibration reduction of vibration of the motion conversion mechanism through the electric driving mechanism. Passive damping force is provided for vibration reduction of vibration of the motion conversion mechanism through the basic damping mechanism. The damping device has the advantages that active and passive damping mechanisms are effectively combined, the excellent damping effect can be achieved under the low-frequency, intermediate-frequency and high-frequency working conditions, and the smoothness and the handling stability of an automobile are improved.

The invention discloses a vehicle steer-by-wire redundancy control method, which belongs to the technical field of automobile steering and comprises the following steps: judging whether a current vehicle starts redundancy control or not, when the redundancy control is started to realize steering of the vehicle, enabling wheels to enter a differential steering mode I, judging whether a vehicle steering angle is consistent with a vehicle expected steering angle or not, and if yes, starting a differential steering mode II; if yes, the wheels are kept in the first differential steering mode, if not, whether the current turning angle of the vehicle changes or not is judged, if not, the wheels enter the second differential steering mode, and if yes, the wheels enter the third differential steering mode; and when the wheels enter the differential steering mode I, the differential steering mode II or the differential steering mode III, outputting the optimal left front wheel driving force and the optimal right front wheel driving force in the corresponding steering mode by utilizing the fuzzy sliding mode controller and the lower-layer controller according to the expected steering angle of the vehicle. When the steer-by-wire system loses efficacy or key components in the steering system break down, the automobile can steer stably.

The invention provides an active suspension control method and system based on rolling driving style recognition, and the method comprises the steps: obtaining brake, accelerator pedal opening, steering wheel angle and vehicle speed information from a CAN bus, so as to construct a working condition information base; pedal opening information and steering wheel angle information are extracted and compared with a preset opening threshold value, and the current driving working condition is recognized; historical vehicle speed information is extracted, rolling cutting based on a time window is carried out on a historical vehicle speed track, and a vehicle speed time sequence is obtained; averaging and standard deviation extraction are carried out on the vehicle speed time sequence to extract statistical characteristics, EMD-DFT is applied to jointly extract time sequence characteristics, and a driving style is identified based on the two characteristics; and the driving working condition and the driving style serve as input to achieve active suspension control. Accurate recognition of the driving style is achieved, meanwhile, rolling recognition based on a time window is introduced, the real-time performance of suspension control is improved, and finally the comfort and operation stability of suspension control are improved in combination with human-vehicle factors.

The invention relates to the technical field of vehicle integrated design and control, and provides an independent steer-by-wire system for a full-vector power chassis and a control method of the independent steer-by-wire system for the full-vector power chassis. Then the steering intention is matched with a corresponding driver map curve, the expected transverse speed and the expected yaw velocity are obtained in combination with the driving parameters, the demanded centripetal force needed by the steering intention is compared with the centripetal force capable of being provided by the vehicle under the current driving condition, and a corresponding Ackerman steering map curve is selected to obtain the optimal Ackerman four-wheel steering angle; and finally, controlling a steering angle module of the vehicle to steer according to the optimal Ackerman four-wheel steering angle, the expected transverse speed and the expected yaw velocity. According to the invention, steering control can be well carried out.

The invention belongs to the technical field of frame height adjustment, and particularly provides a commercial vehicle frame height automatic adjustment system and an adjustment control method, and the method comprises the following steps: obtaining a current vehicle speed and a brake frequency in a set time period; the current driving road condition of the vehicle is judged according to the vehicle speed and the braking frequency, and the received target height is corrected according to the driving road condition; the height difference between the current height and the corrected target height is calculated, and a vehicle frame height control adjusting strategy is output; and outputting a corresponding duty ratio according to the vehicle frame height control adjustment strategy, adjusting the inflation volume of an air spring by controlling the on-off state of an electromagnetic valve, and adjusting the vehicle frame to the corrected target height. By monitoring the vehicle speed and the braking frequency in the set time period in real time, the current driving road condition of the vehicle can be intelligently judged, and the target height of the vehicle frame can be dynamically adjusted according to the road condition. And it is ensured that the vehicle can keep the needed vehicle body posture under different road conditions, and therefore the driving safety and stability are improved.

The utility model provides a pretreatment device for jacquard fabric, and belongs to the technical field of machinery. The problem of poor stability in the prior art is solved. The pretreatment device for the jacquard fabric comprises a rack and further comprises an upper material passing roller, a lower material passing roller, a tensioning roller and a transmission assembly, the upper material passing roller is axially and fixedly connected to the upper portion of the rack, the lower material passing roller is axially and fixedly connected to the middle of the rack, and the tensioning roller is axially and fixedly connected to the rack and located on the side portion of the lower material passing roller; the upper material passing roller, the lower material passing roller and the tensioning roller are connected through the transmission assembly, and the upper material passing roller, the lower material passing roller and the tensioning roller can be driven to rotate synchronously through the transmission assembly. The pretreatment device for the jacquard fabric is high in stability.

The invention provides an electric vehicle path tracking and stability cooperative control method. The method comprises the following steps: constructing a non-linear vehicle ideal dynamic model based on lateral and yaw; establishing a long-short-term memory network prediction model of a nonlinear system, integrating the long-short-term memory network prediction model into a model prediction control algorithm, completing the establishment of a path tracking controller, and outputting a front wheel rotation angle through the path tracking controller; constructing a stability controller; constructing a torque distribution model of multi-target collaborative optimization, and outputting an additional yaw moment through the torque distribution model; butting the front wheel steering angle with the BP neural network, training and outputting a phase plane inward contraction coefficient and an outward expansion coefficient, dividing a phase plane area, judging an area where the vehicle is located, and outputting the front wheel steering angle and the additional yawing moment after cooperative control according to a cooperative control weight coefficient. And finally, path tracking and stability cooperative control of the four-wheel independent drive electric vehicle are realized.

The invention discloses a vehicle semi-active suspension heaven and earth shed control method and system, electronic equipment and a medium, and the method comprises the steps: determining a heaven shed control damping force according to a sprung vertical speed, a sprung vertical speed and a heaven shed damping coefficient, and determining an earth shed control damping force according to the sprung vertical speed, the sprung vertical speed and an earth shed damping coefficient; the road roughness is determined according to the vehicle body pitch angle speed, the vehicle body roll angle speed, the sprung vertical acceleration and the sprung vertical speed; determining a damper operation mode according to the driving mode, and determining a heaven and earth shed distribution coefficient according to the road roughness and the damper operation mode; target damping force is determined according to the ceiling control damping force, the ground ceiling control damping force and the ceiling and ground ceiling distribution coefficient, and then vibration reduction control is conducted on the current vehicle according to the target damping force. According to the method, the accuracy of vehicle semi-active suspension control is improved, so that the riding comfort, the handling stability and the driving safety of the vehicle are improved, and the method can be applied to the technical field of vehicle control.

The invention discloses an extra-high voltage insulator, which solves the problem that dust and ice layers on umbrella skirts are not easy to treat when the extra-high voltage insulator is mounted in the air, and comprises a core rod, end connecting columns are symmetrically mounted at two ends of the core rod, umbrella skirt bodies are mounted on the core rod at equal intervals, the upper surfaces of the umbrella skirt bodies are conical, and the lower surfaces of the umbrella skirt bodies are conical. A rotating treatment assembly is installed between the two end connecting columns and comprises a longitudinal plate arranged on one side of the core rod, umbrella skirt treatment units are installed on the longitudinal plate at equal intervals, the number of the umbrella skirt treatment units is the same as that of the umbrella skirt bodies, and the umbrella skirt treatment units correspond to the umbrella skirt bodies one to one; the umbrella skirt processing unit is used for cleaning and icebreaking the top wall of the umbrella skirt body; during working, the top wall of the umbrella skirt body is cleaned through the bristles arranged below the mounting block, the crushing plate above the mounting block is used for crushing an ice layer on the top wall of the umbrella skirt body, and different effects are achieved according to the use environment.

The invention provides a distributed steer-by-wire vehicle fault-tolerant control method. The method comprises the steps that a distributed steer-by-wire vehicle dynamics model, a two-degree-of-freedom reference model and a steering motor failure model are established; in the design of the upper fault-tolerant controller, a self-adaptive terminal sliding mode control method is adopted, the method has the characteristics of high robustness and self-adaptive parameter change, and the robustness of the system can be considered while the target tracking performance is ensured. In the design of a lower-layer torque and rotation angle optimal distribution reconstruction controller, a failure factor is introduced, two more objective functions are established on the basis of minimizing the tire load rate, and errors between longitudinal and lateral forces and expected target values and errors between yawing moment and additional yawing moment are reduced while the optimized objective functions are ensured to have solutions. According to the method, the uncertainty of the system during the steering failure is fully considered, and the robustness of the system can be considered while the target tracking performance is ensured, so that the control stability of the distributed steer-by-wire vehicle during the steering failure is improved.

The utility model provides an all-terrain vehicle which comprises a left front constant-speed driving shaft, a right front constant-speed driving shaft, a left rear constant-speed driving shaft, a right rear constant-speed driving shaft, a front axle and a rear axle, and the left front constant-speed driving shaft comprises a first inner ball cage type constant-speed universal joint connected with the front axle; the right front constant-speed driving shaft comprises a second inner ball cage type constant-speed universal joint connected with the front axle; the left rear constant-speed driving shaft comprises a third inner ball cage type constant-speed universal joint connected with the rear axle; the right rear constant-speed driving shaft comprises a fourth inner ball cage type constant-speed universal joint connected with the rear axle; the distance between the center of the left front wheel and the center of the right front wheel in the left-right direction is L1, the distance between the center of the left rear wheel and the center of the right rear wheel in the left-right direction is L2, and the distance between the steel ball center of the first inner spherical cage type constant velocity universal joint and the steel ball center of the second inner spherical cage type constant velocity universal joint in the left-right direction is LF. The distance between the steel ball center of the third inner spherical cage type constant velocity universal joint and the steel ball center of the fourth inner spherical cage type constant velocity universal joint in the left-right direction is LR; wherein LF / L1 is larger than or equal to 0.08 and smaller than or equal to 0.25, and LR / L2 is larger than or equal to 0.11 and smaller than or equal to

The present invention relates to a conjugated diene polymer, a method for producing a conjugated diene polymer, a conjugated diene polymer composition, and a rubber composition. The purpose of the present invention is to provide a conjugated diene polymer which has extremely excellent processability when made into a sulfide, and which has excellent wear resistance, handling stability, and breaking strength after being made into a sulfide. A conjugated diene-based polymer which is a copolymer of a conjugated diene compound and an aromatic vinyl compound, and which has a Mooney viscosity measured at 100 DEG C of 40-170, a Mooney stress relaxation rate measured at 100 DEG C of 0.239-0.35, and a branching degree (Bn) of 8 or more as determined by a GPC-light scattering measurement method with a viscosity detector, and which contains a nitrogen atom.

The invention discloses a slow cooling device and a slow cooling method for surfacing of a ball and a valve seat. The device comprises a base, a cooling treatment assembly arranged on the surface of the base, a heating treatment assembly arranged on one side of the surface of the base and a burr removing assembly arranged on the other side of the surface of the base, the cooling treatment assembly comprises vertical plates fixedly connected to the two sides of the surface of the base, openings are formed in the surfaces of the vertical plates, and transverse blocks are detachably connected to the interiors of the openings; the output end of the motor is connected with the input end of a rotating shaft, one end of the rotating shaft extends out of the transverse block, one end of the rotating shaft is detachably connected with fan blades, the rotating shaft drives the fan blades with one ends connected in a matched mode to rotate, and the ball placed on the surface of the base and valve seat surfacing are rapidly cooled. The cooling block works to reduce the temperature around the whole fan blade, the cooling block is installed in an inner groove formed in the surface of the vertical plate through a wire, and then cooling measures of the ball and valve seat surfacing high-precision device are rich before machining.

The present invention provides a pneumatic tire that ensures wet performance and improves handling stability during high-speed cornering. The pneumatic tire has a tread portion (2). The tire has ground contact ends, namely, a first ground contact end (T1), a second ground contact end (T2), and a third ground contact end (T3), when the tire is assembled relative to a regular rim at a regular internal pressure and loaded with 100%, 75%, and 50% of the regular load and ground contact with a flat surface at a camber angle of 0°. A main groove (3) and a shoulder area (5) are provided in the tread half area (2h). At least one first inclined groove (6) is provided in the shoulder area (5). The first inclined groove (6) extends in a manner that intersects at least the first ground contact end (T1), the second ground contact end (T2), and the third ground contact end (T3). The depth of the first inclined groove (6) at the first ground contact end (T1) is smaller than the depth of the first inclined groove (6) at the second ground contact end (T2) and the third ground contact end (T3).

The invention discloses a protection device of a laser cutting machine, which solves the problem of poor waste gas treatment effect caused by long time from waste gas generation to waste gas treatment, and comprises a laser cutter, a laser cutting head is mounted on the laser cutter, the laser cutting head comprises a laser emission head mounted on the laser cutter, and the laser emission head is connected with the laser cutter. A laser emission head is installed at the bottom end of the laser emitter, clamping grooves are symmetrically formed in the two sides of a shell of the laser emitter, a waste gas treatment assembly is installed on the outer side of the laser emission head and used for treating waste gas generated in the cutting process, and the waste gas treatment assembly comprises an installation sleeve arranged on the outer side of the laser emission head in a sleeving mode. An inner cavity is formed in the mounting sleeve; the waste gas treatment assembly is mounted on the outer side of the laser emission head, so that the distance between the waste gas treatment assembly and the waste gas generation position is shortened, the waste gas circulation distance and the waste gas treatment time are shortened, and the waste gas treatment effect is improved.

The utility model relates to the technical field of tires, and provides a super high performance car tire, comprising: a carcass; a plurality of longitudinal main drainage grooves are arranged on the tread of the carcass; the inner side of the tread of the carcass has an inner tread pattern area, and the outer side has an outer tread pattern area; a plurality of first auxiliary drainage grooves and a plurality of second auxiliary drainage grooves are alternately arranged on the inner tread pattern area; a knife groove is also arranged between adjacent first auxiliary drainage grooves and second auxiliary drainage grooves; a plurality of third auxiliary drainage grooves and a plurality of fourth auxiliary drainage grooves are alternately arranged on the outer tread pattern area. The utility model can improve the dry and wet grip and drainage performance, reduce the risk of hydroplaning, and improve the wet driving safety and driving comfort.

The utility model relates to the field of stabilizer bar, especially transverse stabilizer bar's adjustable connecting structure of four -wheel electric vehicle. The utility model discloses stabilizer bar, axle bush and pull rod, stabilizer bar is trapezoidal, and the both ends are punched into the ear piece, axle bush is covered in the middle part of stabilizer bar, and pull rod is provided with two, and is hinged in the both ends of stabilizer bar respectively, and pull rod is installed on the frame, and axle bush is connected with hydraulic device still, and the top of hydraulic device is fixed with bolt and set up on the frame. Axle bush connects hydraulic device, and is electrically connected with automobile ECU and is equipped with electric control proportional valve, can automatically or manually adjust the lateral stabilizer bar roll stiffness according to the intention of driver or road condition. When driving fiercely or high -speed driving, ECU controls electric control proportional valve to adjust hydraulic device output pressure according to sensor group feedback, and the roll stiffness is increased, and the control stability and high -speed driving safety are enhanced.

The present invention provides a method for coordinated control of path tracking and stability of an electric vehicle, comprising: constructing a nonlinear ideal vehicle dynamics model based on lateral and yaw; establishing a long short-term memory network prediction model of a nonlinear system, and integrating the long short-term memory network prediction model into a model prediction control algorithm, completing the construction of a path tracking controller, and outputting a front wheel turning angle through the path tracking controller; constructing a stability controller; constructing a torque distribution model for multi-objective coordinated optimization, and outputting an additional yaw moment through the torque distribution model; connecting the front wheel turning angle with a BP neural network, training and outputting phase plane contraction and expansion coefficients and dividing the phase plane area, judging the area where the vehicle is located, and outputting the front wheel turning angle and additional yaw moment after coordinated control according to a coordinated control weight coefficient, so as to finally realize the path tracking and coordinated stability control of a four-wheel independent drive electric vehicle.

The invention provides a tire cornering stiffness identification method, and relates to the technical field of vehicle parameter identification. Comprising the following steps: S1, establishing a lateral force tire model; s2, designing a tire lateral force estimator; s3, designing a slip angle feedback estimator based on the lateral force estimated in the step S2; and S4, designing a cornering stiffness online identification algorithm based on the lateral force estimated in the step S2 and the slip angle estimated in the step S3. According to the identification method, the real-time lateral force and the slip angle of the tire are considered, the tire cornering stiffness can be estimated in real time, the steps are simple and clear, the accuracy of a calculation result is high, and the problems that most existing tire cornering stiffness obtaining methods are tedious in steps, complex in calculation, low in accuracy and the like are solved.

The invention discloses a vehicle bottom intelligent pneumatic suite structure arrangement optimization method and device, a medium and a product, and relates to the technical field of vehicle aerodynamics and optimizing.The method comprises the steps that a pneumatic suite target height prediction model corresponding to a current working mode is determined as a current pneumatic suite target height prediction model; inputting the vehicle speed, the environment wind speed and the wind direction at the current moment into a current pneumatic suite target height prediction model to obtain a target arrangement state of the pneumatic suite; and a plurality of adjustable device control modules are controlled, so that each pneumatic part in the pneumatic suite reaches the target height. The arrangement state of the vehicle bottom pneumatic suite structure is dynamically adjusted based on the vehicle speed and the wind field environment change during driving, and the operation stability and the fuel economy of the vehicle during high-speed driving are improved.

The invention discloses a model prediction control vehicle obstacle avoidance method based on road and obstacle modeling, and belongs to the technical field of automatic driving and intelligent vehicle trajectory tracking control. Aiming at the problems of insufficient environment modeling, rigid constraint processing, poor limited perception scene adaptability and the like of traditional model prediction control, the invention provides a model prediction control method fusing road and obstacle models. According to the method, constructed structured road boundary and obstacle information is embedded into an optimization target of model prediction control in a continuous differentiable penalty term form, so that soft constraint fusion of a road rule and a safe distance is realized. According to the method, the environmental adaptability and the control reliability in a limited perception structured scene are remarkably enhanced while the driving safety and the track smoothness are improved.

This invention provides a chip inspection device with a defective product collection function, including a collection frame with multiple internal partitions. A rotary motor is fixedly connected to one side of the collection frame, and a positioning gear ring is fixedly connected to the upper side of the rotary motor. A rotary support is fixedly connected to the power output end of the rotary motor. Multiple rotary joints are fixedly connected to one side of the rotary support, and a flip gear is fixedly connected to the movable end of each rotary joint. A micro switch is fixedly connected to one side of the flip gear. The rotary motor drives the rotary support to rotate, and the meshing relationship between the positioning gear ring and the flip gear causes the chip to automatically flip during rotation. When the rotary support rotates 180 degrees, the flip gear can rotate 360 ​​degrees, thereby enabling image inspection of both the front and back sides of the chip at different workstations. This allows for double-sided inspection to be completed in one go, improving inspection efficiency. At the same time, the chip's falling position can help determine the defective surface, facilitating classified collection.

Provided is a bias tire for a two-wheeled vehicle, which can improve the handling stability during cornering. The bias tire for a two-wheeled vehicle (1) includes a carcass (6) of a bias structure. It includes a tread rubber (7) forming a tread portion (2) and a sidewall rubber (8) forming a sidewall portion (3). The tread rubber (7) is connected to the sidewall rubber (8) via an interface (9). The outer end (9a) of the interface (9) in the tire axial direction is closer to the inner side of the tire radial direction than the end of the tread portion (2) in the tire axial direction, i.e., the tread end (Te), and is located on the outer surface of the tire.

The utility model discloses a straight pipe feeding mechanism with rotary upright function belongs to straight pipe conveying device technical field. The mechanism includes the frame with the storage bin, pushes the lift subassembly, conveying mechanism and rotary upright mechanism, and the lift subassembly sets up in the storage bin, is used for pushing the straight pipe from the storage bin to conveying mechanism, and the rotary upright mechanism sets up in the end of conveying mechanism, including rotary cylinder, the material receiving base and the sleeve, and the material receiving base is connected with rotary cylinder output end, and the sleeve sets up on the material receiving base and can be covered into the pipe hole of straight pipe. The mechanism can convert the horizontal posture straight pipe into the upright state in the conveying end, has simplified the subsequent procedure's clamping path, has shortened the processing period, has reduced the workpiece damage risk, has promoted the stability of small bore or long size straight pipe processing, has effectively improved the straight pipe automation processing efficiency.

The utility model discloses a front suspension and car, include: front subframe, including front crossbeam, rear crossbeam, left longitudinal beam and right longitudinal beam, left longitudinal beam and right longitudinal beam all include longitudinal beam upper plate and longitudinal beam lower plate, and longitudinal beam upper plate and longitudinal beam lower plate are formed the first box -like structure with the inner chamber through longitudinal beam flange welding, and the first box -like structure inside is equipped with the reinforcing support, front suspension lower swing arm is installed in the left longitudinal beam and right longitudinal beam of front subframe, and front suspension lower swing arm includes swing arm body, and swing arm body includes swing arm upper plate, intermediate reinforcing plate and swing arm lower plate, and swing arm upper plate and swing arm lower plate are formed the second box -like structure with the inner chamber through lower swing arm flange welding, and intermediate reinforcing plate sets up between swing arm upper plate and swing arm lower plate, and the edge of intermediate reinforcing plate is welded in the second box -like structure, the utility model has improved the strength, rigidity and buckling performance greatly, can guarantee the comfort simultaneously and improve the front wheel transverse positioning precision significantly, thereby improve the control stability and security of whole car.

The invention relates to the technical field of automobile tires, and particularly discloses a spare tire, which is used for solving the problem of insufficient safety of a spare tire in the prior art. Comprising two steel wire rings, the outer sides of the steel wire rings are wrapped with supporting apex, a sidewall is distributed on the outer side of the supporting apex, a polyester tire body layer is arranged between the supporting apex and the sidewall, a lining layer is arranged on the inner side of the supporting apex where the polyester tire body layer is located, two steel wire belt plies are arranged at the upper end of the lining layer, and tread layers are arranged on the outer sides of the steel wire belt plies. The tire further comprises a pattern structure arranged on the tread layer. By optimizing the tread pattern design, the control stability of the tire in the running process is improved, and the braking distance is reduced; by optimizing the contour and structural design of the tire, the tire stress in the driving process is improved, the tire wear is delayed, the effective driving time of the tire is prolonged, and the driving safety is ensured.