129 results about "Kingpin" patented technology

The invention relates to a wheel side speed reduction driving integrated assembly coupling kingpin steering and steering trapezoid, and relates to the technical field of automobile wheel side driving suspension assembly angle modules. A wheel-side speed reduction driving integrated assembly coupling kingpin steering and a steering trapezoid comprises a driving motor, a wheel-side speed reducer and a steering knuckle, the upper end and the lower end of the steering knuckle are rotationally connected with an upper control arm and a lower control arm respectively, and the upper end of the steering knuckle is connected with a kingpin steering mechanism. The upper control arm is connected to the kingpin steering mechanism, the kingpin steering mechanism drives the steering knuckle to rotate around the axis of a kingpin, a vertical connecting rod is connected to the upper portion of the lower control arm, the upper end of the vertical connecting rod extends in the longitudinal direction of a vehicle to form a proportional connecting rod, and a spring shock absorber is hinged to the end of the proportional connecting rod. And the middle part of the proportional connecting rod is connected with the vehicle body. The large-angle steering device has the advantages that space layout optimization is achieved, motion interference among all components is avoided, and the large-angle steering effect can be achieved.

A trailer having an adjustable form factor is provided. The trailer includes a first box portion defining a first space and a second box portion defining a second space, wherein the first box portion is attached to the second box portion and configured to at least partially move into the second space to adjust a length of the trailer. The trailer further includes a kingpin attached to the first box portion and configured to engage a fifth wheel coupling of a vehicle and a wheel assembly attached to the second box portion.

The invention relates to a telescopic steering engine assembly and a steering system, and relates to the technical field of vehicle steering engines. A telescopic steering gear assembly comprises an input gear and an output rack, the input rack is meshed with the output gear and can move in the axial direction under driving of the input gear, the telescopic steering gear assembly further comprises at least one telescopic pull rod, the telescopic pull rod is connected with the end of the output rack and can slide in the axial direction of the output rack, and the telescopic pull rod is connected with the end of the output rack and can slide in the axial direction of the output rack. A locking mechanism is installed at the end of the output rack and used for selectively locking or unlocking the telescopic pull rod and the output rack. A steering system comprises a wheel drive unit and a steering engine assembly, the telescopic pull rod is connected with a steering knuckle of the wheel drive unit, and the wheel drive unit is provided with a kingpin steering mechanism. The steering engine has the advantages that the movement stroke of the steering engine is controllable, and diversified steering modes can be flexibly switched.

This invention discloses a calibration unit for a constant velocity universal four-wheel alignment instrument with a hinged rod, belonging to the field of transportation technology. It includes a unit base, a drive motor mounted on one side of the unit base, a constant velocity rotating seat mounted above the unit base, a kingpin assembly mounted above the constant velocity rotating seat, half-shaft assemblies snapped onto both sides of the kingpin assembly, and angle adjustment assemblies sleeved above the kingpin assembly. Two angle adjustment assemblies are included, each comprising an angle adjustment base, an angle adjustment drive arm, an angle adjustment hinge plate, an angle adjustment kingpin sleeve, and an angle adjustment lever. The upper surface of the unit base is movably connected to the lower surface of the angle adjustment base. The inner side of the angle adjustment base is fitted to one end of the angle adjustment drive arm, and the other end of the angle adjustment drive arm is connected to the angle adjustment lever. The end of the angle adjustment lever away from the angle adjustment drive arm is connected to the angle adjustment hinge plate, and the inner side of the angle adjustment hinge plate is connected to the angle adjustment kingpin sleeve. This invention uses a constant velocity universal joint with a hinged rod, improving measurement accuracy.

The invention relates to a paddy field light chassis space six-connecting-rod steering trapezoidal control system and method based on a kingpin inclination angle. The system comprises a paddy field light chassis, a steering trapezoidal control system and a steering trapezoidal control system, wherein the paddy field light chassis is used for mounting a paddy field agricultural implement; the space six-connecting-rod steering trapezoid is arranged below the front end of the paddy field light chassis and used for steering the paddy field light chassis; the electronic gyroscope is arranged in front of the space six-connecting-rod steering trapezoid and used for measuring main pin inclination angle data and inner and outer steering wheel rotation angle data; the vehicle-mounted embedded microcontroller is arranged on the light chassis of the paddy field, is respectively connected with a steering wheel and an electronic gyroscope which are arranged on the light chassis of the paddy field, and is used for turning the electronic gyroscope after receiving a steering command of the steering wheel; according to the main pin inclination angle data and the steering wheel steering input data collected in real time, the steering angle is calculated according to the steering trapezoid two-dimensional kinematics control model, and then the steering angle is sent to the space six-connecting-rod steering trapezoid to conduct steering action, the sideslip phenomenon in paddy field operation is effectively restrained, and the operation precision of agricultural implements is guaranteed.

The invention discloses a high-integration driving unit with an active variable geometric positioning parameter function. The high-integration driving unit is mainly composed of a wheel assembly, a suspension system, a first actuator and a second actuator. The actuator is arranged on the upper control arm, so that the mechanical load borne by the actuating mechanism during working is effectively reduced. The interior of the actuator is driven by a self-locking mechanism, continuous energy consumption is not needed when positioning parameters are maintained, and the steady-state power consumption of the system is remarkably reduced. In the aspect of mechanism connection, through combined arrangement of kinematic pairs, accurate matching of the degree of freedom of movement of the mechanism is achieved, the problems of interference and movement uncertainty in the adjusting process are effectively solved, and the accuracy of action execution is ensured. The unit integrates the functions of steering, active variable camber, active variable kingpin caster angle and fault tolerance. Dynamic real-time adjustment of geometric parameters is achieved through the compact structural layout, the vehicle control limit and stability are improved, and meanwhile the space utilization rate and work reliability are extremely high.

The invention provides a method and device for determining vehicle rack force and related equipment. On one hand, the stress conditions of two steering wheels on a steering shaft are firstly obtained, then the master pin total torque of the steering shaft is determined on the basis of the stress conditions of the steering wheels in combination with master pin parameters of the steering shaft, and the first rack force of the steering shaft is determined from the mechanical angle according to the master pin total torque; on the other hand, the second rack force of the steering shaft can be determined from the angle of kinematics according to the motion data of the target vehicle; on the other hand, the third rack force of the steering shaft can be determined from the angle for driving the steering shaft according to the output condition of the steering motor of the steering shaft. That is to say, when the rack force of the steering shaft is estimated, three times of rack force estimation can be carried out from three angles of kingpin stress, kinematics and a driving motor, and then the actual rack force is determined by integrating the rack force estimated for three times based on the actual situation of the vehicle. Thus, the rack force is determined by integrating multiple aspects, and the accuracy of the rack force can be improved.

A drive plate assembly for a king pin removal tool comprising a drive member, the drive plate assembly comprises a drive plate and an insert. The drive plate defines a main opening and a flange recess. The insert comprises a shaft portion and a flange portion and defining a drive opening. The insert is arranged such that the shaft portion is within the main opening, the flange portion is within the flange recess, and the drive member is adapted to be threaded into the drive opening. When the drive member is received within the drive opening and axially rotated relative to the insert, a drive force applied by the drive member forces the flange portion of the insert against a surface of the drive plate defining at least a portion of the flange recess.

The utility model relates to a hanging device for non-standard basket pulley head of shallow silo inclined roof, which comprises a parapet slope, a shallow silo trestle column is vertically installed at the lower right end of the parapet slope, and a basket working steel wire rope is wound around the outer surface of the shallow silo trestle column, a runway hole is formed in the connecting bottom plate, and the inside of the runway hole is fixed on the parapet slope through an M12 expansion nut, the pulley body is fixedly connected to the inner wall of the fixed side plate through a kingpin, and the U-shaped rope clamp groove penetrates the U-shaped rope clamp plate. The hanging device for non-standard basket pulley head of shallow silo inclined roof meets the safety requirements in the operation process of the basket, does not need to install a front support, is easy to install for an operator, reduces the work of installing a counterweight block for a standard basket, is convenient to disassemble in the later period, can be taken down after the M12 expansion nut is loosened, can be recycled, only needs to replace the expansion bolt, and has low cost.

A simulator is provided. The simulator includes a kingpin configured to couple to a fifth-wheel of a vehicle, a vertical actuator attached to the kingpin and configured to vertically actuate the kingpin, a horizontal actuator attached to the vertical actuator and configured to horizontally actuate the kingpin, and a simulation controller communicatively coupled to the vertical actuator and the horizontal actuator. The simulation controller is configured to retrieve predefined scenario data from a memory device and control the vertical actuator and the horizontal actuator based on the predefined scenario data to simulate mechanical effects of a trailer on the vehicle.

The invention provides a kingpin assembly for a commercial vehicle and the vehicle. The rolling parts are arranged at the two ends of the main pin and matched with the thrust tapered roller bearings, the rolling parts are used for bearing loads in the radial direction of the main pin assembly, and the thrust tapered roller bearings are used for bearing loads in the axial direction of the main pin assembly. According to the kingpin assembly of the structure, loads from all system directions of the vehicle can be effectively decomposed to the rolling part and the thrust tapered roller bearing, and the problem that the kingpin assembly is pressed due to the fact that the same bearing component is subjected to excessive loads at the same time is effectively solved. According to the main pin assembly, the bearing capacity of the main pin assembly can be further improved, meanwhile, the main pin assembly adopting the structure is simple in structure and convenient to install, the safety performance of a vehicle with the main pin assembly is effectively improved, the main pin assembly can be particularly suitable for a heavy-load commercial vehicle, and the practicability of the main pin assembly is further improved.

The application provides a hollow front axle of a micro-light truck with a shock absorber hole and a manufacturing method thereof, and belongs to the technical field of automobile parts, comprising a hollow axle body, a shock absorber ring, a steering limiting block and a fist end plugging. The hollow axle body comprises a middle beam, a bent neck and a fist. The two ends of the middle beam are provided with the bent necks, the end of the bent neck is provided with the fist, the inside of the fist is provided with a rectangular hole, the rectangular hole is welded solid through the fist end plugging, the fist is provided with a king pin hole for installing a king pin, the king pin hole is provided with a lock pin hole along the axial direction, the rear side of the fist is provided with a limiting block groove, and the limiting block groove is embedded and welded with the steering limiting block. The end of the bent neck is provided with the shock absorber hole, the front and rear sides of the end of the bent neck are provided with blind holes, and the front and rear sides of the blind holes are welded with the shock absorber ring. The shock absorber hole is processed on the solid structure, the strength requirement of installing the shock absorber pin shaft is met, and the inner cavity of the hollow front axle is prevented from being filled with water when the shock absorber pin shaft is assembled, so that the service life is reduced.

The invention relates to a gapless meshing kingpin steering gear with a self-locking structure, and belongs to the technical field of automobile steering equipment. The gapless meshing kingpin steering gear with the self-locking structure comprises a power assembly, a shell, a worm, an idle gear A, an idle gear B, an adjusting assembly, a transmission shaft A, a transmission shaft B and a transmission gear D, the shell is provided with a worm through a power assembly and a bearing; a worm gear and a transmission gear A are arranged on the shell on one side of the worm through a bearing and a transmission shaft A; the worm is meshed with the worm gear; a transmission gear B and a transmission gear C are arranged on the shell on one side of the transmission gear A through a bearing and a transmission shaft B; and a transmission gear D is arranged on the shell on one side of the transmission gear C through a bearing and an output shaft. The gapless meshing kingpin steering gear with the self-locking structure is compact in structure, ingenious in design and particularly suitable for the use requirement of a new energy automobile steering system.

The utility model relates to the technical field of maintenance of steering knuckles, and discloses a simple claw master pin dismounting tool which comprises a base and a supporting frame arranged on the base. The jack is mounted in the middle of the upper surface of the base, and the circular jacking column is arranged right above the jack, so that the steering knuckle master pin can be quickly disassembled; the circular jacking column is fixedly connected to the top of an inner cavity of the supporting frame, and the axis of the circular jacking column and the axis of a jacking rod of the jack are both arranged on the same axis. Through cooperation of the base, the supporting frame, the jack and the circular jacking column and a parallel face formed between the jack and the circular jacking column, the steering knuckle can be conveniently placed, then the jack can conveniently eject out a master pin of the steering knuckle, damage to the steering knuckle caused by a hammer knocking mode is avoided, and the dismounting efficiency and safety of the master pin are improved; the maintenance efficiency of the steering knuckle is improved, the overall structure is simple, and practicability is improved.

Device (12) for inductive energy transfer between a traction battery (10) and an electric motor (8) of a semi-trailer truck (2) with a tractor unit (4) and with a semi-trailer (6), wherein the tractor unit (4) has the traction battery (10) or the electric motor (8), comprising - a kingpin (14) formed by means of a ferromagnetic first core (22) which is provided with a first transformer winding (24), and - a fifth wheel coupling (18) with a seat (20) for the kingpin (14), wherein the fifth wheel coupling (18) has a ferromagnetic second core (30) with a second transformer winding (32), - wherein the ferromagnetic first core (22) is I-shaped and the ferromagnetic second core (30) is U-shaped, - wherein its U-shaped legs (34) face the seat (20) of the fifth wheel coupling (18), so that when the kingpin (14) is received in the seat (20) a transformer core is formed by means of the ferromagnetic first core (22) and by means of the ferromagnetic second core (30), and - wherein the second core (30) is curved inwards on its U-shaped legs (34) at the free end.

The utility model discloses a lorry-mounted crane supporting leg soft leg detection structure which comprises a base body, the base body is provided with an oblong-hole-shaped sliding groove used for installing a main pin shaft, the main pin shaft slides up and down in the sliding groove, a large bearing, a spacer bush and a flat washer are arranged on the main pin shaft, and a large check ring is arranged in a groove of the main pin shaft. The flat washer is located between the base body and the large check ring. A positioning screw, a driving lever pin shaft and a travel switch are arranged on the base body, a driving lever and a torsion spring are arranged on the driving lever pin shaft, a small check ring is arranged in a groove of the driving lever pin shaft, a swing rod of the travel switch swings along with the driving lever, an auxiliary pin shaft is arranged on the driving lever, an inner check ring is arranged in a groove of the auxiliary pin shaft, and a small bearing is arranged on the auxiliary pin shaft. According to the utility model, the modular design is adopted, the structure is compact, installation and use are convenient, and the use cost is low; through the amplification effect of the deflector rod, the detection precision is high, and the response is timely; and the stability of hoisting operation is improved, and tipping accidents are reduced.

The invention discloses a multi-mode kingpin steering type high-integration traveling unit based on an active tie rod. The multi-mode kingpin steering type high-integration traveling unit comprises a wheel assembly, a kingpin steering system, a suspension system, an active steering tie rod system and a steering control mechanism. The high-integration driving unit can achieve various steering modes through a main pin steering motor in combination with a clutch set in an active steering tie rod system. All clutches are combined in a trapezoidal steering mode, and steering pull rods are fixedly connected into a whole; in the steering decoupling mode, mechanical constraint is disconnected, and independent steering of the left wheel and the right wheel is achieved through a main pin steering motor; the active toe-in mode improves high-speed handling stability by dynamically fine tuning wheel geometric parameters. In the safety level, the system covers a single-motor fault-tolerant mode, a fully-mechanized dual-motor fault-tolerant mode and a cross-system braking mode for generating frictional resistance by utilizing limit deflection of wheels on the two sides when a braking system fails. According to the invention, high-reliability redundancy and multi-dimensional motion control are realized, and the flexibility and safety of the vehicle are improved.

The application discloses a vehicle deviation correction compensation control method and device, equipment and storage medium, and belongs to the technical field of vehicle management. The method comprises the following steps: acquiring deviation reference information of a vehicle; acquiring a first steering torque difference of the vehicle under the condition that the deviation reference information meets a deviation correction condition, wherein the first steering torque difference is a difference between a kingpin rotation torque corresponding to a first side steering wheel of the vehicle and a kingpin rotation torque corresponding to a second side steering wheel of the vehicle; determining a first compensation torque of the vehicle according to the first steering torque difference; and controlling a steering wheel of the vehicle based on the first compensation torque, so that the vehicle keeps straight driving. In the method, the first steering torque difference is caused by any factor leading to vehicle deviation, therefore, the first compensation torque determined by the first steering torque difference considers more comprehensive factors, so that the first compensation torque is more accurate, and the effect of deviation correction compensation control is improved.

The present application relates to the technical field of vehicles, and particularly relates to a virtual kingpin steering angle module, comprising: a wheel assembly; a steering knuckle, the upper part of the steering knuckle being provided with an upper mounting seat; a steering mechanism, the output end of the steering mechanism being connected with the upper mounting seat through a three-ball-pin universal joint, the steering mechanism driving the wheel assembly to rotate through the steering knuckle; an upper control arm, the upper control arm comprising an integral lifting lug and an upper cross arm; wherein the three-ball-pin universal joint comprises a ball cage and three ball pin heads which are arranged in the ball cage and uniformly distributed in the circumferential direction, forming a virtual kingpin axis with the center of the three-ball-pin universal joint as a reference, and realizing load decoupling of the steering torque and the ground vertical force. The present application has the advantages that through the spatial arrangement of the three groups of spherical pairs, the torque can be reliably transmitted, the redundant constraints can be reasonably released, the small angular displacement and the adaptive swing around the central axis are allowed, the rigid conflict is avoided, the internal additional stress is significantly reduced, and the load and wear of the bearings and transmission parts are reduced.

The device (2) uses the kingpin (6) of semi-trailers (1) to increase power efficiency and safety by detecting longitudinal forces to control acceleration, braking, and power regeneration with the help of load cells (7) or a hydraulic cylinder (19) with load transducer sensors (20), activating the electric motor during acceleration (A) and regenerative braking during deceleration (D). It can be integrated with systems such as EBS, TCS, and ESC. The device (2) is mounted on the semi-trailer friction plate (1) and sends information to the acceleration / regeneration controls. The device (2) contributes to optimizing vehicle performance, focusing on power savings and safety in transport operations.

The invention relates to a side-mounted passive follow-up steering suction nozzle wheel assembly for a sweeper truck. The side-mounted passive follow-up steering suction nozzle wheel assembly comprises a mounting bracket, two ball head assemblies, a bearing seat, a shaft, a tire assembly and the like. The two ball head assemblies are connected with the installation support through the tapered ball rods of the ball head assemblies, the ball seats with the flanges of the ball head assemblies are connected with the bearing seat, and therefore the double-ball-head parallel suspension is formed, a virtual master pin is formed, the connecting line of the two ball rod installation holes is arranged to form an included angle with the perpendicular line, and the adjusting shim is additionally arranged on the lower ball head assembly. Kingpin backward inclination and kingpin inward inclination are achieved respectively, and the tire assembly is endowed with the functions of passive follow-up steering, automatic aligning and linear stable walking. Particularly, through the structural design, the central plane of the tire coincides with the axis of the virtual main pin, zero transverse offset distance is achieved, and the eccentric wear phenomenon of the side-mounted steering wheel is eliminated fundamentally. In addition, the tire assembly adopts a multi-stage sealing and special bearing structure, so that the durability and the safety under severe working conditions are improved.

The embodiment of the application provides a kind of vehicle steering control method and vehicle, the method comprises: obtaining the kingpin angle signal and target angle signal of vehicle;Determine the shimmy characteristic quantity based on kingpin angle signal, wherein the shimmy characteristic quantity is used to indicate the dynamic modal characteristics of harmful angular oscillation of wheel assembly around kingpin shaft;Utilize shimmy characteristic quantity to generate state weight coefficient;Based on weight coefficient and target angle signal, generate motor control instruction for controlling vehicle steering.Solve the technical problems that the existing technology causes angle module kingpin steering system to rely on fixed parameter filter or high bandwidth observer to suppress shimmy, leading to band mismatch, unable to guarantee steering tracking precision.

The utility model relates to the technical field of safety rope hanging and taking equipment, in particular to an electric iron tower safety rope hanging and taking device which comprises a main body base, a pull plate, a main pin shaft, a pull ring and a self-locking structure, a connecting hole is formed in the main body base, the main pin shaft is movably arranged in the connecting hole, and the main pin shaft is connected with the self-locking structure; the self-locking structure comprises a first connecting rod, a second connecting rod, a first swing arm, a second swing arm, a first limiting clamping plate and a second limiting clamping plate, the first swing arm is movably arranged on a first rotating shaft of the main body base, and one end of the first swing arm is connected with a first plug pin on the main pin shaft through the first connecting rod; the second swing arm is movably arranged on a second rotating shaft of the main body base, and one end of the second swing arm is connected with a first plug pin on the main pin shaft through a second connecting rod. The safety rope lifting device can be matched with the unmanned aerial vehicle for lifting and transporting, a self-locking structure is formed after the unmanned aerial vehicle arrives at a designated position, and an operator can hang a safety rope conveniently.

A press tool for displacing a first part along a drive axis relative to a second part comprises a drive plate defining a drive opening, an anchor plate, a drive screw assembly, and a spacing system. The drive screw assembly comprises a drive screw member and a drive screw cap. The spacing system supports the drive plate and the anchor plate relative to first part such that the drive screw member and the first part are aligned with the drive axis. The drive screw member engages the drive plate such that rotation of the drive screw member relative to the drive plate assembly displaces the drive screw through the drive opening to displace the first part along the drive axis relative to the second part.

The utility model relates to mechanical engineering, primarily transport engineering, and specifically to stabilizers of lateral (transverse) stability (tilt) of railway cars, primarily passenger cars, as well as to trackless transport. The end of a tie rod of a torsion stabilizer of lateral stability of a car body comprises: a housing (7) in the form of a body of revolution with a threaded shank for connection with a coupling rod of the tie rod; a ball joint located in the cavity of the housing (7) with an outer ring installed in the housing (7) and an inner ring installed on a symmetrical kingpin (3); two opposite identical flanges (5, 6) with sleeve parts (13, 14), detachably connected to the ends of the kingpin (3).In this case, the possibility of rigid installation of the tip in a socket-forming U-shaped bracket (2) in cross-section on the frame (1) of the body with two spaced parallel mounting cheeks (9, 10) and with an overlay support plate (8), with a distance B between the mounting cheeks (9, 10) of the latter (2), central through holes (12) in the cheeks (9, 10) of diameter D and threaded holes (15) in the cheeks (9, 10) for bolts (4) for fastening the tip by means of its flanges (5, 6) is provided. The body (7) of the tip is made with a length less than the value B, and the pin (3) and the sleeve part (13, 14) of the flanges (5, 6) are made with diameters less than the value D with the possibility of their installation in the body (7), previously inserted into the socket (socket space) (11) of the bracket (2) between the cheeks (9, 10), through the central hole (12) of the cheek (9 (10)) from the outside of the socket (11).In the recommended particular case, the flanges (5, 6) are provided with a through hole (18), and the kingpin (3) is provided with a threaded hole (19) at the ends, with the possibility of their bolted connection with partial coverage of the kingpin (3) by the sleeve parts (13, 14) of the flanges (5, 6). An additional feature of the device is provided. The use allows for improvement of the TEV, including adaptability to the original mounting socket-forming bracket as part of the frame, as well as expansion of the range of device options in the conditions of a variety of designs of rolling stock cars. 1 sp. f-ly, 2 fig.

The application discloses a kind of automobile steering knuckle main pin hole drilling equipment, it is related to drilling equipment technical field, including operation table and the clamping assembly of setting in operation table top;Still include: drill table, it is set with two and symmetrically distributed in the two sides of operation table;Feed assembly, in the top of two drill tables each set a group, for control fixedly connected in its movable end movable platform linear motion.The application is worn by the accurate perception and intelligent matching of two sides drill bit wear state by the structure of symmetrically arranged double drill table and rotary table, in combination with torque sensor real-time monitoring and data comparison component, the coaxiality precision and processing stability of main pin hole are effectively guaranteed when system detects that the difference of two sides torque exceeds threshold value by transverse comparison, can automatically select the pair of wear state closest from two sides alternative drill bit to switch, simultaneously, by longitudinal comparison to independently evaluate and early warning to each drill bit life, make full use of tool life.

The invention relates to a device and method for disassembling a main pin bush on a front drive axle, and relates to the technical field of upper main pin bush disassembling. The front end of a loading rod of the device faces the front drive axle and is provided with an expansion core, the periphery of the expansion core is sleeved with an expansion sleeve, and a torsion nut, the expansion core and the expansion sleeve are all arranged in the upper main pin bush; the expansion sleeve is provided with a plurality of claw strip blocks which are annularly arranged, the claw strip blocks are clamped and hooked with the step surface of the upper main pin bushing, and the torsion nut is arranged at the front end of the loading rod and used for adjusting the relative position of the expansion core and the expansion sleeve; the rear end of the loading rod is connected with a fixed handle in a fastening mode, and the periphery of the loading rod is sleeved with an inertia hammering sleeve in a sliding mode. By means of the method, efficient and lossless disassembly of the upper kingpin bush is achieved, scratching of the inner wall of a bush hole in a traditional method is avoided, the hidden danger of leakage of lubricating oil is fundamentally eradicated, and therefore the integrity of parts is guaranteed, the maintenance cost is remarkably reduced, and the overall service life of a steering system is prolonged.

A truck suitable is described herein that is suitable for attachment to a skateboard, the truck including: a kingpin having a shaft with a first end portion and a second end portion; an elastic bushing having a hub with a plurality of outwardly-extending spokes, the hub having an opening for receiving the shaft of the kingpin; a baseplate having an opening for receiving the first end portion of the kingpin, the baseplate; a first undulating surface fixed relative to the baseplate and facing the elastic bushing for seating the elastic bushing; a hanger having an opening for receiving the second end portion of the kingpin; and a second undulating surface fixed relative to the hanger and facing the elastic bushing for seating the elastic bushing; wherein hanger is pivotable relative to the baseplate about the kingpin.