70results about How to "Improve curve passability" patented technology

The invention discloses a rapid freight car radial bogie. The rapid freight car radial bogie comprises an axle assembly, a frame, a swing bolster, a braking device, central suspension devices, a radial device, a side bearing device arranged on the swing bolster and an axle box suspension device, wherein the frame is installed on the axle assembly through the axle box suspension device, the two ends of the swing bolster are fixedly installed in the middle of the frame respectively through the central suspension devices, the frame is composed of two side beams and parallel cross beams connected with the side beams, and bearing platforms where the central suspension devices are installed are arranged outside the middle portions of the side beams. The rapid freight car radial bogie structure obviously reduces wheel-rail wear and wheel-rail noise, reduces wheel-rail acting force, reduces vehicle transverse vibration acceleration and improves vehicle operation lateral stability, straight line stability and curve line negotiating capacity. The unsprung mass of the bogie is reduced, the speed of the bogie is high, vehicle braking performance is improved, wheel-rail wear and wheel-rail noise are small, vehicle operation stability is good, and stability and safety are high.

The invention provides a rail vehicle wheel pair motor direct driving system. The system comprises a driving motor, a soft starter and two elastic couplings, and the soft starter is in controlled electrical connection with the driving motor; the driving motor is a permanent magnet synchronous motor with a hollow rotating shaft, the axle of a rail vehicle traverses through the hollow shaft of the driving motor, and then two ends of the axle are fixedly connected with a wheel pair; each of the elastic couplings comprises a driving plate, a pull rod, a rubber ball joint, a driving pin and a connecting bolt, the driving plate is connected with the pull rod through the driving pin, and the rubber ball joint is fixedly arranged in the pull rod; the elastic couplings are fixedly connected with vehicle wheels by allowing the connecting bolts to traverse through the rubber ball joints; and two ends of the rotating shaft of the driving motor are in transmission connection with the elastic couplings respectively. The rail vehicle wheel pair motor direct driving system effectively saves the cost, reduces the noise, improves the transmission efficiency and improves the curve negotiating ability of a bogie; and compared with asynchronous motors with a same capacity, the driving motor has the advantages of greatly reduced size and mass, and obvious energy saving effect.

The invention provides a bogie of a railway vehicle and the railway vehicle. The bogie of the railway vehicle comprises two sets of wheel pairs, load bearing saddles arranged on the rotation shafts of the wheel pairs, and side frames arranged on two load bearing saddles at the same side. Elastic pads are arranged between the load bearing saddles and the side frames. The elastic pads are distributed around the upper surface and the side surface of the load bearing saddles. The bogie with the elastic pad structure having certain angle and large deflection can significantly enhance the curve negotiation performance of the bogie, reduce the abrasion of the wheel, realize the low driving power effect of the wheel track, and reduce the damage to the route.

The invention discloses a toothed rail car bogie. The toothed rail car bogie comprises a framework and two groups of wheel pairs, wherein the two groups of wheel pairs are mounted on the framework; one group of the two groups of wheel pairs is driving wheel pairs; the other group is non-driven wheel pairs; the driving wheel pairs comprise driving shafts and wheels, wherein the wheels are connectedwith the driving shafts through bearings; the wheels independently move relative to the driving shafts; toothed rail wheels are mounted on the driving shafts in the form of interference fit; and a driving device used for driving the driving shaft to rotate is connected to the framework. The toothed rail car bogie has the advantages that the deadweight of the vehicle can be effectively reduced, the structure of the bogie can be simplified, the performance of the bogie can be improved, the curve trafficability of the vehicle can be improved and so on.

The invention relates to an active radial system for a rail train. The active radial system comprises a train level controller, a line information measuring unit, train control positive displacement servo controllers and action executing units. Train bodies of the rail train are each provided with one train control positive displacement servo controller and four action executing units connected with the train control positive displacement servo controller, and the four action executing units are symmetrically arranged on the two sides of a front bogie and the two sides of a rear bogie of each train body correspondingly. The line information measuring unit is arranged on the head train body. The line information measuring unit, the train control positive displacement servo controllers and a fault guiding safety unit are all connected to the train level controller, and the train level controller controls the system to work in a precise type autonomous control mode, in a precise type dependency control mode and in a head train guiding type autonomous control mode. According to the active radial system for the rail train, compared with the prior art, the speed of the rail train passing a curve on an existing line can be increased, the operating efficiency is improved, and meanwhile a fault guiding safety function is achieved.

The invention discloses a railway vehicle frame and a bogie. The railway vehicle frame is a layered box-like frame; the frame is provided with a cantilever type motor suspension beam; the height of an upper cover plate of the motor suspension beam is larger than that of a cross beam upper cover plate of the frame; the upper cover plate of the motor suspension beam is fixedly connected with the cross beam upper cover plate of the frame through an upper cover plate on a frame side beam; a mounting space for a magnetic track brake is formed on the frame; the mounting space for the magnetic track brake is positioned under the motor suspension beam; and a secondary suspension mounting seat is arranged at the middle part of the frame side beam. According to the invention, 100% of low-floor target can be realized, the taking area is large, the strength of the layered frame is great and the railway vehicle frame satisfies lightweight requirements.

The invention provides a hub type independent wheel bogie, and relates to the bogie used for high speed trains or urban rail transit vehicles. A framework of the hub type independent wheel bogie includes two symmetrically arranged side frames, a central cross beam and two side cross beams; the side frames are of an H-shaped welding structure, the upper portions of the side frames are provided withinstallation bases with air springs, and the end portions of the side frames are provided with installation bases used for installing braking callipers and installation bases with transverse oil-pressure shock absorbers; the central cross beams and the two side cross beams all adopt seamless steel tube structures; the two end portions of each side cross beam stretch out of the corresponding sideframe and used for installing a shaft box body; independent wheel sets are hung on the side frames of the framework through the shaft box body; the braking callipers are installed on the installationbases of the braking callipers on the end portions of the side frames of the framework; a sensor is installed on the lower portion of a vehicle body and located above the independent wheel sets. Air springs are installed on the installation bases of the air springs of the upper portions of the side frames of the framework; the transverse oil-pressure shock absorbers are installed on the installation bases of the transverse oil-pressure shock absorbers on the end portions of the side frames of the framework. The wheel bogie has the advantages that the structure is novel, processing is simple, the wheeltrack friction is small, the curve passing performance is good, and operation is smooth, steady, efficient and safe.

The invention relates to a four-axis high speed turning frame used for s vehicle, which comprises a truss and four wheel sets, a driving device, a hanging mechanism, a brake device and a driving mechanism which are arranged on the truss, wherein, the wheel sets are arranged on the truss via the hanging mechanism, and each wheel set is respectively connected with the driving mechanism and the driving device which are arranged on the truss. The four wheel sets are divided into two groups in pairs, and two wheel sets in a same group are connected with each other via a balance beam of a bearing with a spherical surface axis box. The balance beam is fixed on the truss via a supporting shaft, and one or more than one screw spring is arranged between the balance beam and the truss. The four-axis high speed turning frame has big traction power, big adhesion weight, big traction capability, good curved line passing performance and small friction consumption of a wheel track.

The invention discloses a framework apparatus based on a novel primary suspension and a longitudinal motor, and belongs to the field of framework apparatuses of railway vehicle power bogies. The apparatus comprises a bidirectional output shaft motor, four primary steel springs, four primary vertical shock absorbers, two gearboxes, two forged piece side beams, a longitudinal motor shell, four wheelset built-in primary suspension axle box devices, two side beam balance connecting rods and four shell side beam connecting columns; the bidirectional output shaft motor is coaxially and fixedly connected in the longitudinal motor shell, and the two gearboxes are rotationally and symmetrically arranged at the two ends of the longitudinal motor shell; and the front output end and the rear output end of the bidirectional output shaft motor are in transmission connection with the corresponding gearboxes through bevel gears respectively. A large amount of framework space can be saved, so that thecompact layout of the wheel set built-in primary suspension axle box devices is implemented, the control difficulty of synchronously controlling two motors is reduced, the motor control program is simplified, the electric energy utilization and conversion efficiency and the control efficiency are improved, and the energy-saving and environment-friendly properties of a train are enhanced.

The invention discloses a highway and railway dual-purpose vehicle, which comprises a vehicle body, and further comprises a non-power running portion and a power running portion installed below the vehicle body. The non-power running portion comprises a framework, a traction lifting device and a non-power wheel pair axle box positioning device and braking devices. The power running portion comprises the framework, the traction lifting device, a power wheel pair axle box positioning device and driving devices. The non-power wheel pair axle box positioning device comprises an axle and a pair offirst wheels arranged on the axle. The braking devices are arranged at the both ends of the axle and on the inner sides of the first wheels. The power wheel pair axle box positioning device comprisesa crankshaft and a pair of second wheels arranged on the crankshaft. The driving devices are arranged at the both ends of the crankshaft. The highway and railway dual-purpose vehicle solves the problems that in the prior art the operation speed is slow, the weight is heavy, the running stability is poor, and a large space under the vehicle is occupied.

The invention provides a guide wheel guide control device and a rubber tire guide rail streetcar. The guide wheel guide control device comprises a front wheel base, a rear wheel base and a guide mechanism. A front guide wheel is arranged in the front wheel base. A rear guide wheel is arranged in the rear wheel base. The guide mechanism comprises a hinge center platform and two connecting rod and sliding block assemblies. The two connecting rod and sliding block assemblies are symmetrically arranged on the two sides of the center platform. Each connecting rod and sliding block assembly comprises two connecting rods, a guide rail, a sliding block and a driving mechanism used for driving the sliding block to reciprocate, wherein the guide rail is located between the two connecting rods, and the sliding block is in sliding connection with the guide rail. The connecting rods and the guide rail in one connecting rod and sliding block assembly are hinged to the position between the front wheel base and the hinge center platform, and the connecting rods and the guide rail in the other connecting rod and sliding block assembly are hinged to the position between the rear wheel base and the hinge center platform. The overall structure of the guide wheel guide control device is simplified, and curve passing ability and derailment prevention performance of the rubber wheel guide rail streetcar are improved.

The invention discloses a longitudinal motor type modular power bogie, and belongs to the field of longitudinal motor type railway vehicle bogie devices. The modular power bogie comprises a bidirectional output shaft motor, two wheel sets, four brake clamp units, four primary steel springs, four primary vertical shock absorbers, two anti-snaking shock absorbers, two secondary vertical shock absorbers, two gearboxes, two secondary transverse shock absorbers, two air springs, two forged piece side beams, a longitudinally-arranged motor shell, four wheel set built-in primary suspension axle box devices, a center traction seat mechanism, two side beam balance connecting rods, two combined connecting seats, four shell side beam connecting columns, an n-shaped anti-side-rolling torsion bar mechanism and a traction seat fixing and shock absorbing mechanism. According to the invention, the framework space can be greatly saved, the compact layout of the wheel set built-in primary suspension axle box devices can be implemented, the motor control program can be simplified, the electric energy utilization and conversion efficiency and the control efficiency can be improved, and the energy-saving and environment-friendly properties of the train can be enhanced.

The invention relates to a thrust wheel and a bogie, and in particular relates to a thrust wheel (which is applicable to heavy-duty railway wagons, can reduce loss and unsprung mass, and can reduce the operation cost, improve the quality of operation and greatly increase the carrying capacity) for heavy-duty railway wagons, and a bogie thereof. The bogie comprises a central crossbeam, side frames and wheel sets, wherein the side frames are symmetrically connected to the two ends of the central crossbeam, and the wheel sets are symmetrically arranged at the two ends of each side frame by a wheel set shaft; and the bogie is characterized in that the bogie also comprises at least a pair of thrust wheels arranged between the wheel sets; the thrust wheel is arranged on the side frame and comprises a rim, a radial plate and a hub which are integrally arranged; and the external wheel surface of the rim is not provided with a wheel flange, and the operating surface of the rim is axially horizontal and 115mm in width. The thrust wheel and bogie provided by the invention has the advantages that: the carrying capacity of the bogie is greatly increased, the contact stress to a wheel rail is reduced, the abrasion of the wheel rail is reduced, the quality of operation is improved, and the operating cost is reduced; meanwhile, the bogie is simple in structure, low in manufacturing difficulty, and low in cost.

The invention discloses a superconducting electric electromagnetic hybrid maglev train, which comprises L-shaped suspension frames and an I-shaped ground rail, and is characterized in that the upper end of each suspension frame is connected with a train body through an air spring; the suspension frames are arranged on the two sides of the ground rail, and the suspension frames and the ground railare arranged at intervals. A plurality of superconducting magnets is arranged at the lower end of each suspension frame. An 8-shaped upper-layer suspension coil and an 8-shaped lower-layer suspensioncoil are arranged at the upper end and the lower end of the ground rail respectively, an upper-layer power generation coil and a lower-layer power generation coil are arranged at the lower end of thesuspension frame, and the upper-layer suspension coil is electrically connected with the lower-layer suspension coil; and a propelling coil is arranged above the upper-layer suspension coil. The invention has the advantages of large operation air gap, self-stabilization, good suspension guiding dynamic performance, better curve passing capacity, higher superconducting magnet magnetic field utilization rate and lower track construction cost.

The invention discloses an axle box cross connection type express freight car bogie. The bogie comprises an axle assembly, a framework, axle box suspension devices, a swing bolster, a foundation brakedevice, side bearings, an empty and load adjusting device and a central suspension device, the axle box suspension devices are installed at the two ends of the axle assembly respectively, the framework is located above the four axle box suspension devices, and the four axle box suspension devices are connected in a crossed mode through a crossed connection device; the cross connection device comprises two pull rods which are located below the swing bolster and arranged in a cross mode, and the two tail ends of each pull rod are hinged to an axle box suspension device of the bogie through elastic spherical hinges respectively. Constraint of the front wheel set and the rear wheel set is enhanced; the shearing rigidity between the wheel sets is increased, the snaking instability critical speed of the bogie is greatly increased, the axle box cross connection device can be suspended by adopting an axle box with soft rigidity, the operation stability is ensured, the head shaking constraintof the wheel sets can be released, the wheel rail acting force, wheel rail abrasion and operation noise are reduced, and the overall dynamic performance of the vehicle is improved.

The invention relates to a bearing platform type sleeper beam structure for a railway vehicle. The bearing platform type sleeper beam structure comprises an upper cover plate, a lower cover plate and a web. A notch corresponding to a secondary steel spring of a bogie is formed in the lower cover plate. A box which is located between the lower cover plate and upper cover plate and used for being inserted into the upper end of the secondary steel spring is fixed at the notch. The box and the notch coordinate to form a bearing platform structure. A pin hole allowing for insertion of a secondary steel spring positioning pin is formed at the top of the box. A positioning pin mounting seat allowing for insertion of the secondary steel spring positioning pin is fixed at the back of the box. The bearing platform type sleeper beam structure is suitable for the bogie with secondary steel spring, the steel spring is disposed on a swing bolster, vehicle curve negotiation rate is increased, and vehicle production and maintenance cost is lowered. A connector of a sleeper beam and the steel spring of the bogie is submerged into the sleeper beam, and the rigidity and height requirements of the secondary steel spring can be satisfied by strength of the rib plate reinforced bearing platform box and the positioning pin mounting seat.

The invention provides a road-rail car driven by rubber wheels. The road-rail car driven by rubber wheels comprises a car frame. Rotary rubber-wheel sets are arranged at the front end and the rear end of the car frame correspondingly, and each rubber-wheel set comprises two car wheels; the convertible car for the highways and the railways driven by the rubber wheels is characterized in that each rubber-wheel set is provided with a railway guiding device, and the railway guiding device comprises an upper rotary seat, a lower rotary seat and guide wheels capable of lifting; bearings are arranged between the upper rotary seat and the lower rotary seat, a restoring plate extending downwards is arranged at the bottom of the upper rotary seat, and a plurality of rubber blocks are arranged on the lower rotary seat; the multiple rubber blocks are symmetrically arranged on the two sides of the restoring plate, the restoring plate is clamped among the rubber blocks, and the guide wheels are arranged on the lower rotary seat; and the upper rotary seat is fixed at the bottom of the car frame, and the railway guiding device is located.between the two car wheels of the corresponding rubber-wheel sets. And thus, the curve passage capacity and the universality of the road-rail car driven by rubber wheels are improved.

The invention discloses a new structure of a motor wheel set unit of motor rigid shaft-holding gearless driving. Compared with the traditional wheel set motor unit which transfers torque by gear drive, the structure well solves the contradictions between the high rotating speed and the low torque of the motor, and between the low rotating speed and the large torque of the wheel set, and one more gear drive system is provided. The new wheel set motor enables the center line of the motor to be overlapped with the center line of the wheel set axle, wherein the axle is a motor rotor and the motor shell is a motor stator. Without the gear drive, the electromagnetic torque generated by the motor directly drives the axle, the counter torque generated by the motor shell is balanced by a motor pull rod arranged on the shell, and the rubber joints at two ends of the motor pull rod are respectively connected with the motor shell and a truck beam. The motor wheel set unit of motor rigid shaft-holding gearless driving disclosed by the invention is capable of realizing the functions of the traditional wheel set motor unit, satisfying the growing requirements on energy saving as well as environmental protection and improving the curved passing capacity of a bullet train, and has the characteristics of being simple and convenient in structure, high in efficiency, safe and reliable.

The invention relates to a railway vehicle bogie which comprises a first wheel pair, a second wheel pair, a first side frame, a second side frame, a swing bolster, a damping device, a carrying saddle, a secondary spring suspension and a constant-contact side bearing. The first side frame and the second side frame are mounted on outer sides of two ends of the first wheel pair and the second wheel pair, and the railway vehicle bogie is characterized in that a two-stage-stiffness primary suspension system is mounted between a small guide frame on an end portion of each side frame and the carrying saddle, and a first pull rod and a second pull rod are connected between triangle holes of the first side frame and the second side frame and intercrossed. The railway vehicle bogie has the advantages that the railway vehicle bogie is simple in structure, convenient to maintain and high in adaptability to twisted lines, shear deformation of the two side frames of the bogie is restrained by elasticity, and diamonding is inhibited, so that the bogie has a certain capacity to restore a correct position, dynamic acting force of wheel / rail parts is relieved, radial capacity between wheels and rails of the bogie, vehicle running speed and curve passage capacity are improved, and vehicle running quality is improved.

The invention discloses an axle box built-in subway bogie based on a flexible interconnection framework and an upper swing bolster, and belongs to the field of railway vehicle power bogie devices. The flexible interconnection frame comprises a wheel set device composed of wheels and axles, a horizontal and longitudinal integrated flexible interconnection frame, four annular vibration reduction axle boxes, an easy-to-withdraw shaft type gearbox, a side beam single-point suspension type motor, an integrated vibration reduction type swing bolster and a secondary suspension system. The damping requirement for the whole framework is greatly reduced, and the effects of reducing the number of parts, reducing the failure rate, releasing the layout space of a motor and a gearbox and releasing the maintenance operation allowance are achieved; on the premise of ensuring the mounting position and the vibration reduction index of the primary suspension axle box device, the transverse width size and the turning radius of the whole bogie are effectively reduced, the curve passing capacity of the bogie is further improved, and the annular vibration reduction axle box is convenient to mount, dismount and maintain; and after four fastening bolts are respectively dismounted, the side beam single-point suspension type motor can be directly and independently dismounted from the lower part of the vehicle body through the maintenance trench.

An articulated aluminum alloy EMU car body bottom frame end structure, comprising a car end connection area and a passenger compartment passage area arranged in the longitudinal direction, the car end connection area and the passenger compartment passage area are composed of an articulated seat, two traction beams, The "mesh"-shaped overall frame structure composed of two bolster beams, two side beams and partition walls; the hinge seat is located in the middle of the car end connection area, the upper surface of the traction beam, the upper surface of the bolster beam and the The upper surface of the side beam is flush; the partition wall is arranged in parallel with the two sleeper beams and is connected with the other end of the traction beam and the side beam; the lower part of the two traction beams and the two sleeper beams is provided with a hinged support for supporting the fixed hinge seat Structure; a side floor is arranged above the frame structure between the two traction beams and the side beams; the upper surface of the passenger compartment passage area is slightly lower than the upper surface of the end connection area, and the lower surface of the traction beam is connected to the middle floor of the hinged support structure , the upper surface of the traction beam is connected with the side floors on both sides, forming a concave structure in the cross-sectional direction of the vehicle body.

The invention discloses a controller-based active radial bogie and an active steering control method thereof. The controller-based active radial bogie comprises an active radial bogie body, a drivingcircuit, a displacement sensor and the controller; the active radial bogie body comprises a main framework, an auxiliary framework and a radial driving mechanism; the main framework is hinged to the auxiliary framework; the two ends of the radial driving mechanism are connected with a front rotating arm and a rear rotating arm of the main framework respectively; the displacement sensor is installed on the main framework; the displacement sensor and an pulse encoder are connected with the controller; the controller is connected with a motor of the radial driving mechanism through the driving circuit. With the controller-based active radial bogie and the active steering control method thereof, the active steering control effect of the active radial bogie can be improved; the running stability and curve trafficability of a railway vehicle are improved; control is stable; steering control precision is high; immunity to external interference is almost realized; accurate active steering is achieved; the abrasion of wheel sets is effectively reduced; and the service lives of the wheel sets are prolonged.

The invention discloses a framework apparatus based on a novel damping structure, and belongs to the field of framework devices of railway vehicle power bogies. The apparatus comprises a bidirectionaloutput shaft motor, four primary steel springs, four primary vertical dampers, two anti-snaking dampers, two secondary vertical dampers, two gear boxes, two forged piece side beams, a longitudinally-arranged motor shell, two side beam balance connecting rods, two combined connecting seats, four wheel set built-in primary suspension axle box devices, an n-shaped anti-side-rolling torsion bar mechanism and four shell side beam connecting columns. According to the invention, a large amount of framework space can be saved, the compact layout of the wheel set built-in primary suspension axle box devices is implemented, the programming difficulty of synchronously controlling two motors is reduced, the motor control program is simplified, the electric energy utilization and conversion efficiencyand the control efficiency are improved, and the energy-saving and environment-friendly properties of a train are enhanced.

The invention discloses a variable-section bullet train, which comprises a train body. The train body comprises a middle area identical in section size and narrowing areas at the front and and / or therear end of the middle area. The narrowing areas are connected with the middle area, and the section of each narrowing area is gradually narrowed towards a direction away from the middle area. By thevariable-section bullet train, the requirement of small limit of the bullet train can be met, and great performance of the train passing through small-curve-radius rails is achieved.

The invention provides a hinge pin type bogie adopting a single permanent magnet direct drive motor and double shafts for simultaneously driving an urban rail vehicle. The hinge pin type bogie comprises a bogie framework, wherein the bogie framework is composed of side beams and a sleeper beam and integrally forms an H-shaped framework after being mounted, permanent magnet motor mounting holes are formed in the bogie framework, the motor mounting holes are formed in two sides of the sleeper beam, and the motor mounting holes are longitudinally and transversely arranged in a symmetrical manner along the bogie; an air spring mounting base is arranged on the sleeper beam, and the bogie framework is connected with a vehicle body through two air springs; and a permanent magnet direct drive motor is longitudinally arranged below the sleeper beam, outputs torque from two ends, and transmits the torque to a wheel pair through an elastic coupling and a gear box. Due to the adoption of a single-motor frame suspension type structure, the unsprung weight and the overall weight of the bogie are reduced, and the size of the bogie is also reduced; and meanwhile, a face gear is used as a transmission gear, so that the bearing capacity and the transmission stability are improved.

The invention discloses a driving system based on a high-temperature superconducting magnetic levitation demonstration model. The system comprises a model trolley, a permanent magnet track, a displacement sensor, a single-chip microcomputer, a power supply and a driving coil. The model trolley is placed on the permanent magnet track. The model trolley comprises a shell and a heat preservation inner shell. Vehicle-mounted permanent magnets are arranged at the four corners in the shell. A liquid nitrogen filling port and a liquid nitrogen outlet are formed in the shell. The liquid nitrogen filling port and the liquid nitrogen outlet are communicated with the heat preservation inner shell. A high-temperature superconducting block is arranged at the bottom of the heat preservation inner shell.The displacement sensor is arranged in the middle of the upper end of the driving coil. The bottom face of the driving coil is fixed to the permanent magnet rail. The power source is electrically connected with the displacement sensor, the single-chip microcomputer and the driving coil. The displacement sensor is used for detecting passing or leaving of the model trolley, the single-chip microcomputer is used for controlling the driving coil to be powered on / off, and the displacement sensor is connected with the single-chip microcomputer. The system has the advantages of high curve passing performance, low cost, good acceleration and deceleration stability and the like.

The invention discloses a framework device based on a longitudinal motor and a novel center pin boss, and belongs to the field of railway vehicle bogie framework devices. The device comprises a bidirectional output shaft motor, two anti-snaking shock absorbers, two secondary vertical shock absorbers, two gear boxes and two secondary transverse shock absorbers, and the device is characterized by further comprising two forged piece side beams, a longitudinal motor shell, a center traction base mechanism, two side beam balance connecting rods, four shell side beam connecting columns and a traction base fixing and shock absorbing mechanism; the bidirectional output shaft motor is coaxially and fixedly connected into the longitudinal motor shell, and the two gear boxes are rotationally and symmetrically arranged at the two ends of the longitudinal motor shell; and the front output end and the rear output end of the bidirectional output shaft motor are in transmission connection with the corresponding gear boxes through bevel gears respectively. A large amount of framework space can be saved, a motor control program can be simplified, the electric energy utilization and conversion efficiency and the control efficiency are improved, and the energy-saving and environment-friendly attributes of a train are enhanced.

The invention discloses a railway freight car side bearing and a railway freight car bogie. The side bearing comprises a wearing plate, a side bearing seat, a rubber elastomer, a roller assembly and acover plate; the wearing plate is mounted on the upper side of the cover plate; the roller assembly is installed on the side bearing seat; the rubber elastomer comprises an inner core, a rubber layerand an outer sleeve which are sequentially connected in a sleeved mode from inside to outside; a plurality of metal inner sleeves are fixedly embedded in the rubber layer; a closed sliding cavity isformed between the side bearing seat and the cover plate; the rubber elastomer is supported on the lower side face of the cover plate; and the rubber elastomer is installed in the sliding cavity. Therubber elastomer of the side bearing is arranged in a closed mode, external acid-base pollution and gravel dust interference are avoided, and the service life of the rubber elastomer which is a vulnerable part is prolonged.