CN113022626A

CN113022626A - Bogie based on flexible interconnection framework and overhead swing bolster

Info

Publication number: CN113022626A
Application number: CN202011057050.5A
Authority: CN
Inventors: 赵�卓; 姜奕竹; 阴晓铭; 赵克楠
Original assignee: CRRC Changchun Railway Vehicles Co Ltd
Current assignee: CRRC Changchun Railway Vehicles Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-06-25
Anticipated expiration: 2040-09-30
Also published as: CN113022626B

Abstract

A bogie based on a flexible interconnection framework and an overhead swing bolster belongs to the field of power bogie devices of railway vehicles and comprises an axle box, a wheel pair device consisting of wheels and axles, a transverse and longitudinal integrated flexible interconnection framework, an easy-to-withdraw shaft type gear box, a side beam single-point suspension type motor, an integrated vibration reduction type swing bolster and a secondary suspension system. The invention greatly reduces the requirement for vibration reduction of the whole framework, and has the effects of reducing the number of parts and the failure rate, releasing the layout space of the motor and the gear box and overhauling operation allowance, simplifying the size of the framework and simplifying the manufacturing process; according to the invention, after the fastening bolts of the four flexible suspension rubber nodes of the motor and the suspension rubber nodes of the side beam end motor are respectively removed, the side beam single-point suspension motor can be directly and independently removed from the lower part of the vehicle body through the overhaul trench.

Description

Bogie based on flexible interconnection framework and overhead swing bolster

Technical Field

The invention belongs to the field of power bogie devices of railway vehicles, and particularly relates to a bogie based on a flexible interconnection framework and an overhead swing bolster.

Background

When the railway train bogie is designed, not only the structural strength and flexibility of a framework serving as a bearing main body, the action effect of various auxiliary damping components such as anti-snake dampers and the like, the installation mode of a braking mechanism and the like need to be comprehensively considered, but also various factors such as the suspension mode of a motor of the power bogie, the placement position of an axle box on a wheel shaft, the layout space of the motor and a gear box thereof, the structural form and the layout space of primary suspension and secondary suspension devices and the like need to be comprehensively designed according to the theoretical speed per hour, the bearing load, the minimum bend curvature, the road conditions such as wind, snow, flying stones and the like of trains according to different vehicle type requirements. Various design schemes developed around the core idea are improved and complicated day by day, so that iterative updating and continuous progress of the manufacturing level of the power bogie are promoted finally, framework schemes of different vehicle types are updated, and some new schemes of new forms even completely replace old ideas, so that the core improvement of the power bogie has obvious difference and innovation.

As shown in fig. 1 and 2, the frame of the railway passenger car bogie can be divided into a welded frame formed by butt welding a plurality of plate groups and a cast frame formed by integral casting, but the integral structures of the welded frame and the cast frame both belong to a frame which is formed by a cross beam body and two side beams and has a top view in a letter H shape, the geometric center of the frame is an integral cross beam body H or a cross beam body g in a shape like a Chinese character jing, the two types of cross beam bodies are both used for forming a short cross beam in the middle of a letter H stroke structure, and the two side beams are arranged at two ends of the cross beam body in a bilateral symmetry manner; the cross beam body is composed of two small cross beams perpendicular to the side beams. As shown in figure 1, for a welded side beam formed by assembling and welding a plurality of plates to form a box-shaped structure, a welding side beam i is generally a bird wing-shaped structure with two upturned wings, and a welding wheel axle seat i-2 is fixedly welded and connected to the lower end surface of an inclined plane i-1 at the wing root part of each bird wing-shaped structure correspondingly. And each welding piece side beam spring cap cylinder i-3 is fixedly connected to the tip end of one welding piece side beam i in a welding way. The side beam upper cover plate and the side beam lower cover plate of the welding part side beam i and the two welding part side beam side wall plates i-4 clamped between the side beam upper cover plate and the side beam lower cover plate are all special bird wing-shaped structures matched with the side wall plates i-4 of the welding part side beam, so that the clamping and positioning operation during the integral assembly welding of the welding part side beam i is relatively complex, a large number of positioning fixtures are needed to be used in the manufacturing process to ensure that the two welding part side beam side wall plates i-4 are respectively and vertically welded and fixedly connected with the welding part side beam lower cover plate according to the parallel postures, and the positioning of the plurality of side wall plate connecting rib plates and the welding part side beam spring cap barrel i-3 can be realized only by complex positioning tools which are additionally designed. For example, chinese patent publication No. CN110722319A discloses a welding and positioning tool for side beams of a railway carriage frame, and the disclosed complicated positioning tool structure is additionally designed to improve the assembly and positioning accuracy of components such as side beam spring cap cylinders i-3, reduce calibration and mapping work, and reduce labor intensity. Similarly, the process of positioning and welding the wheel axle seat i-2 at the lower end of the inclined plane of the wing root part of the side beam of the weldment can be smoothly implemented only by specially designing a group assembling and positioning tool for the normal assembling and welding of the side beam, wherein the group assembling and positioning tool is disclosed as CN108817797A, and the design and the manufacture of the positioning tool inevitably bring about great increase of the production cost. In the welding and cooling process of the welding side beam i, the welding side beam i is distorted and deformed in multiple directions and different dimensions due to the influence of stress during welding and cooling, so that the welding side beam i generates various asymmetric structural dimension deviations such as stretching, distortion, side inclination and the like, the welding quality can be reluctantly ensured only by additionally adding correction and adjustment operations, particularly, a welding side beam cross beam pipe through hole i-5 serving as a subsequent processing positioning reference can not be penetrated by a welding cross beam pipe g-1 or two welding cross beam pipes g-1 can not be kept parallel if the welding side beam cross beam pipe through hole is not coaxially aligned, calibrated and adjusted, so that the positioning reference and the subsequent machining precision of the whole welding framework are seriously influenced, even symmetrical parts such as an anti-snake-vibration absorber and the like can not fully play the damping function due to the failure of geometric symmetry, and further the vibration characteristic of the framework is influenced, impairing the overall service life of the bogie. However, the adjustment and repair work needs a large amount of surveying and mapping and repeated secondary processing work, and the workload is heavy and complicated, and the efficiency is low. For the cast side beam shown in fig. 2, the cast side beam j and the integral cross beam body h are integrally cast and molded by a casting mold, so that the processes of size measurement, clamping and positioning and the like in the manufacturing process of the welded side beam i are avoided, but compared with the welded side beam i, the flexibility of elastic deformation of the cast side beam is weakened due to the more rigid mechanical property of cast steel, so that the cast side beam needs to be matched with a more complex two-system damping system comprising a side rolling resistant torsion bar and a snake-shaped resistant damper.

As shown in fig. 3 to 5, the secondary suspension device of the conventional bogie includes, but is not limited to, a secondary transverse damper k, two air springs m, an anti-roll torsion bar mechanism n, two secondary vertical dampers v and a secondary transverse stopper w for releasing various vertical vibration and torsional, torsional and overturning stresses between the frame and the vehicle body, and a traction mechanism formed by two secondary traction pull rods p and a traction sleeper beam q together is used for transmitting the driving force of the bogie to the vehicle body underframe supported by the traction mechanism. However, the upper ends of the secondary transverse shock absorber k, the two air springs m, the two secondary vertical shock absorbers v and the anti-rolling torsion bar n on the existing bogie are usually directly connected below the bottom frame of the car body, and the structure causes that when the bogie is butted with the car body or is overhauled and maintained, the crane hoisting or car lifting station of a car lifting machine needs to be occupied for a long time, the speed increase of the production beat is seriously limited, the productivity and the efficiency are limited, in addition, the larger vertical span value between the car body and the frame also puts higher requirements on the respective vertical heights and the mechanical strengths of the secondary transverse shock absorber k, the two air springs m, the two secondary vertical shock absorbers v and the anti-rolling torsion bar n, and the manufacturing and detection costs of the parts are additionally increased. In addition, the structural form and the layout position of the anti-rolling torsion bar n are comprehensively designed according to the span and the height of a framework, the vehicle body load and the complex stress state of the rolling torsional pendulum movement, design parameters of the anti-rolling torsion bar n are usually obtained in a static strength test and a dynamic test of the framework, and extra large amount of test expenses and design research and development time are invested for the design parameters, so that the design cost is further improved, especially partial traditional frameworks are needed, and anti-snake-shaped vibration absorbers are also needed to be additionally arranged on two side beams respectively, so that the rolling and snake-shaped movement of the train bogie is further reduced in an auxiliary mode.

On the other hand, as shown in fig. 1 and 2, the integral cross beam body h or the cross beam body g of the conventional power bogie is generally provided with a motor hanging seat t and a gear box hanging seat u, which are respectively used for fixedly connecting a traction motor r and a gear box s, and a dual-motor installation mode that the front traction motor r and the rear traction motor r are rotationally and symmetrically arranged by using the geometric center of the integral cross beam body h or the cross beam body g is adopted to counteract the reverse torques of the two motors, so that the overall mechanical stability and the vibration balance characteristic of the power bogie are optimized. However, the installation mode depends on the integral cross beam body g or the cross beam body h in a shape like a Chinese character jing and is completely and rigidly connected with the motor hanging seat t and the gear box hanging seat u, the layout positions and the welding manufacturing processes of the motor hanging seat t and the gear box hanging seat u not only put higher requirements on the structural strength and the symmetry precision of the cross beam body, but also occupy most of the space on the inner side of the conventional framework, so that the inner side of the conventional bogie lacks enough space for arranging the axle box a, a typical primary suspension device can only be arranged at two end parts of an axle, the risk of damaging the axle box is increased, the integral structural size and the turning radius of the bogie are increased, the improvement of the minimum curve passing capacity is not facilitated, and the lifting lugs of the shell of the traction motor r are of a rigid structure which can not be removed, so that the lifting lugs, the framework and the gear box structure interfere and block each other, the traction motor r cannot be directly detached from the lower part of the vehicle body in the overhaul trench, and the car lifting jack is required to be used for separating the carriage above the framework from the framework, so that the traction motor r can be detached from the upper part of the framework, and the difficulty in motor maintenance and replacement is greatly increased. Meanwhile, the motor hanging seat t and the gearbox hanging seat u which are rigidly connected also cause that the traction motor r and the gearbox s lack an enough vibration damping protection system, so that the installation of auxiliary structures such as an anti-snake-shaped vibration damper, an anti-side-rolling torsion bar n and the like becomes indispensable necessary supplement.

In addition, different train design hourly speed requirements or different side beam structural forms can also have great influence on the layout space and structural form of the primary suspension device, the secondary suspension device, the motor and the gear box, which often results in that the layout scheme of the old primary suspension device or secondary suspension device cannot meet the requirements of installation position and vibration reduction index, and the old reference scheme must be overturned to make design improvement of a brand new concept.

As shown in figures 6 to 8, the big gear s-2 installed inside the housing s-1 of the existing buckling and splicing type gear box is directly pressed with the bearing outer ring s-3-2 on the big gear bearing s-3 to form a coaxially fixed interference fit, the gear box installation shaft section d-1 on the axle d is directly pressed with the big gear bearing inner ring s-3-1 on the big gear bearing s-3 to form a coaxially fixed interference fit, the coaxially fixed form of the interference fit causes the gear box installation shaft section d-1, the gear box bearing s-3 and the big gear s-2 to be an inseparable whole, and because the structural strength of the housing s-1 of the buckling and splicing type gear box is low, the housing can not be directly used as the origin of a releasing baffle plate on a wheel shaft releasing and releasing force machine, and, the bearing inner ring of the existing large gear bearing s-3 is too narrow, so that even if a withdrawal baffle on a wheel shaft withdrawal pressure machine is refitted into a multi-jaw chuck form, the bearing is inserted into the gear box from an axle through hole on the axial side wall of the gear box, and the radial withdrawal stopping acting force cannot be reliably implemented on the inner ring s-3-1 of the large gear bearing because of lack of enough radial acting points, so that the axle withdrawal cannot be directly implemented, when the axle d or the big gear s-2 is repaired subsequently, the original splicing and buckling state of the casing s-1 of the gear box which is buckled and spliced is firstly released, and the axle d, the gearwheel s-2 and the gearwheel bearing s-3 which are coaxially and fixedly connected with the axle d are integrally dismounted from the framework and then transferred to an axle dismounting pressure machine to finish dismounting and replacing operations. The method is complicated in process, time-consuming and labor-consuming, and cannot be used for conveniently and rapidly detaching and replacing the axle d on the premise of not detaching the gearwheel s-2 from the buckled and spliced type gear box shell s-1, or the axle d cannot be detached independently and the gearwheel s-2 in the gear box shell s-1 can be directly overhauled, lubricated and maintained at a hole left after the axle d is removed on the premise of keeping the buckled state of the buckled and spliced type gear box shell s-1.

A median vertical plane is a virtual geometric plane that symmetrically divides an object with a symmetrical structure into two parts that are mirror images of each other.

Disclosure of Invention

The technical problems to be solved by the invention are as follows:

1) in the manufacturing process of the existing welding type side beam with the bird wing-shaped curve structure, a large number of positioning clamps are needed to ensure that the side wall plates of the two welding side beams are respectively and vertically welded and fixedly connected with the lower cover plate of the welding side beam according to the parallel postures.

2) The positioning process of the plurality of side wall plate connecting rib plates of the welding type side beam and the spring cap barrel of the welding side beam can be realized only by additionally designed complex positioning tools; and it must be through the extra correction that increases and adjust and repair the operation and can correct the stretching, distortion, many asymmetric structural dimension deviations such as heeling of different yards and direction appearing in the welding cooling process, guarantee welding quality reluctantly; especially, the through hole of the beam tube of the side beam of the weldment serving as the positioning reference of subsequent processing must be coaxially aligned, calibrated and adjusted, otherwise, the beam tube of the weldment cannot penetrate into the through hole, or two beam tubes of the weldment cannot be kept parallel, so that the positioning reference and subsequent machining precision of the whole welding frame are seriously influenced, even symmetrical parts such as an anti-rolling torsion bar and an anti-snaking shock absorber cannot fully play the damping function because of the failure of geometric symmetry, the vibration characteristic of the frame is influenced, and the whole service life of the bogie is weakened.

3) Moreover, the upper ends of the secondary transverse shock absorbers, the two air springs, the two secondary vertical shock absorbers and the anti-side-rolling torsion bars on the secondary suspension device of the traditional bogie are usually directly connected below the underframe of the car body, and when the structure leads to butt joint of the bogie and the car body or maintenance and repair, the structure needs to occupy the car falling station of a crown block hoisting machine or a car lifting machine for a long time, so that the speed increase of the production beat is seriously restricted, and the improvement of the productivity and the efficiency are limited. Moreover, a larger vertical span value between the carriage and the frame also puts higher requirements on the respective vertical heights and mechanical strengths of the secondary transverse shock absorber, the two air springs, the two secondary vertical shock absorbers and the anti-rolling torsion bar, and the manufacturing and detection costs of the components are additionally increased.

4) On the other hand, rely on whole crossbeam body or well style of calligraphy crossbeam body and completely with motor hanger bracket and gear box hanger bracket rigid connection's motor mounting means, the overall arrangement position and the welding manufacturing process of its motor hanger bracket and gear box hanger bracket, not only all put forward higher requirement to the structural strength and the symmetry precision of crossbeam body, but also occupied most space of conventional framework inboard, cause current bogie inboard to lack sufficient axle box overall arrangement space, cause typical primary suspension device to only can arrange at two tip of axletree, not only increased the impaired risk of axle box, also increased the holistic structural dimension of bogie simultaneously and radius of gyration, be unfavorable for the improvement of its minimum curve throughput.

5) Because the lug of traction motor shell is undetachable rigid structure, cause it to interfere each other with framework and gear box as the structure and block, cause traction motor can't directly remove alone from automobile body below via in overhauing the trench, and must use car lifting jack, with the carriage and the framework separation of framework top, could realize moving back traction motor from the framework top and unload, greatly increased the degree of difficulty that motor maintenance was changed.

6) The large gear installed in the buckled and spliced gear box shell forms an interference fit through the large gear bearing and the gear box installation shaft section of an axle to form a coaxially fixedly connected form, so that the gear box installation shaft section, the gear box bearing and the large gear form an inseparable whole, and the buckled and spliced gear box shell cannot be directly used as an acting point of a withdrawing baffle on an axle withdrawing pressure machine due to low structural strength, and moreover, the inner ring of the bearing of the existing large gear bearing is too narrow, so that even if the withdrawing baffle on the axle withdrawing pressure machine is modified into a multi-claw chuck form and inserted into the gear box from an axle through hole on the axial side wall of the gear box, the inner ring of the large gear bearing cannot be reliably subjected to radial withdrawing blocking acting force due to lack of sufficient radial acting points, and the axle withdrawing cannot be directly implemented, when the factors cause follow-up maintenance of the axle or the gearwheel, the axle cannot be conveniently and rapidly detached and replaced independently on the premise that the gearwheel is not detached from the shell of the lock splicing type gearbox, and the axle cannot be pulled out independently on the premise that the lock state of the shell of the lock splicing type gearbox is kept, and the gearwheel in the shell of the gearbox can be directly maintained, lubricated and maintained through holes left after the axle is detached.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the bogie based on the flexible interconnection framework and the overhead swing bolster comprises an axle box and a wheel pair device consisting of wheels and an axle, and is characterized by further comprising a transverse and longitudinal integrated flexible interconnection framework, an easy-to-withdraw axle type gear box, a side beam single-point suspension type motor, an integrated vibration reduction type swing bolster and a secondary suspension system;

the transverse and longitudinal integrated flexible interconnection framework comprises two transverse and longitudinal integrated frameworks which are rotationally symmetrical with each other, and each transverse and longitudinal integrated framework comprises an integrated side beam and an integrated cross beam which are integrally formed; the integrated side beam comprises a side beam middle section which is used as two bird wing connecting parts and is positioned at a lower position and two bird wing-shaped side beam cantilever sections which are symmetrically and fixedly connected with two ends of the side beam middle section, wherein each bird wing-shaped side beam cantilever section is formed by connecting an inclined section which is tilted upwards and a horizontal extension section which extends horizontally outwards; the integrated cross beam and the middle section of the integrated side beam are integrally formed in a casting mode in an included angle posture of an alpha angle; the value range of the included angle alpha is 60 to 90 degrees;

each transverse and longitudinal integrated framework further comprises a framework spring mounting seat, a framework traction pull rod seat, a framework transverse stopping seat, a side beam self-provided gear box hanging seat, a gear box vertical stopping seat, two semi-ring clamp type shaft box hanging seats, a motor single-point hanging seat, a motor vertical limiting stopping seat, a framework vertical vibration damper seat, an antenna beam hanging seat, a framework transverse vibration damper seat, a flexible interconnection connecting mechanism and an interconnection butt joint seat, wherein the interconnection butt joint seat and the integrated cross beam are symmetrically distributed on the left side and the right side of a vertical plane in the middle section of the side beam, and the flexible interconnection connecting mechanism is inserted into and fixedly connected with the interconnection butt joint seat;

the framework transverse stopping seat is fixedly connected with the upper end of a cantilever section of the bird wing-shaped side beam adjacent to one side of the integrated cross beam; the gearbox hanging seat and the gearbox vertical stopping blocks are sequentially and fixedly connected to the inner side wall of the cantilever section of the bird wing-shaped side beam below the root part of the framework transverse stopping seat from top to bottom; the motor single-point suspension seat, the motor vertical limiting stop and the framework vertical damper seat are all positioned on the cantilever section of the bird-wing-shaped side beam adjacent to one side where the interconnected butt joint seat is positioned, wherein the framework vertical damper seat is fixedly connected to the inner side wall of the lower part of the inclined section of the cantilever section of the bird-wing-shaped side beam, the motor single-point suspension seat is fixedly connected to the bottom of the lower end surface of the inclined section of the cantilever section of the bird-wing-shaped side beam, and the motor vertical limiting stop is fixedly connected to the upper end of the junction of the inclined section and the horizontal extension section of the cantilever section; the antenna beam hanging seat is arranged on the outer side wall of the farthest end of each bird wing-shaped side beam cantilever section, and the semi-ring clamp type axle box hanging seat is arranged at the bottom of the far end of each bird wing-shaped side beam cantilever section; the transverse shock absorber seat is fixedly connected with the middle section of the upper end surface of a corresponding integrated cross beam;

the easy-to-withdraw shaft type gear box is pressed on a gear box mounting shaft section of the axle, and one side of the easy-to-withdraw shaft type gear box is connected to a gear box hanging seat through a gear box hanging rod;

one side of the side beam single-point suspension type motor is fixedly connected to the motor single-point suspension seat, and the other side of the side beam single-point suspension type motor is elastically connected with the easy-to-withdraw shaft type gear box in a rubber node suspension mode;

the integrated vibration damping type swing bolster and the secondary suspension system are positioned above the transverse and longitudinal integrated flexible interconnection framework and are correspondingly connected with the transverse and longitudinal integrated flexible interconnection framework;

the two horizontal and vertical integrated frameworks are symmetrically arranged in a circumferential rotationally symmetrical layout mode, and are flexibly connected through the end heads of the respective integrated cross beams and the flexible interconnection connecting mechanism on the other integrated side beam, so that the horizontal and vertical integrated flexible interconnection frameworks are formed together.

An axle mounting hole and a motor coupler mounting hole are formed in the middle of a gearbox shell of the easy-to-withdraw shaft type gearbox, four motor flexible suspension rubber node seat holes distributed according to an isosceles trapezoid are fixedly connected to the same side of the gearbox shell on the periphery of the motor coupler mounting hole, the included angle beta between the center of each of the two lower motor flexible suspension rubber node seat holes and the hole center connecting line of the motor coupler mounting hole is 100-140 degrees, and the optimal value is 120 degrees; a gear box shell vertical stop block is fixedly connected to the outer side wall of the gear box shell at the intersection of the extension line of the center connecting line of the axle mounting hole and the motor coupling mounting hole and the gear box shell; the outer side wall of the gear box shell below the vertical stop block of the gear box shell is fixedly connected with a vertical hanging rod seat of the shell, and two ends of the gear box hanging rod are respectively provided with a rubber vibration damping gasket which is used for elastically connecting the vertical hanging rod seat of the shell with the gear box hanging seat.

The lower part of the rear end cover of the side beam single-point suspension type motor shell is fixedly connected to a motor single-point suspension seat through a side beam end motor suspension rubber node and a motor suspension rubber node semi-ring clamp, the upper part of the rear end cover of the side beam single-point suspension type motor shell is fixedly connected with a horizontal motor vertical cantilever stop rod, the motor vertical cantilever stop rod is suspended right above a motor vertical limiting stop, and the range of the gap value between the motor vertical limiting stop rod and the motor vertical cantilever stop rod is 10-50 mm; a motor shell positioned at the end of a motor output shaft on the side beam single-point suspension type motor is fixedly connected to four motor flexible suspension rubber node seat holes in an elastic suspension mode through four motor flexible suspension rubber nodes respectively, and the motor output shaft of the side beam single-point suspension type motor is rotatably connected to a reduction gear mechanism inside a motor coupler mounting hole through a coupler.

The integrated damping type swing bolster and secondary suspension system comprises a swing bolster, two secondary air springs under two bolster beams, two traction pull rods, a transverse shock absorber under the bolster beams, two vertical shock absorbers and two side bearings; the swing bolster is of a box-type structure, an inner cavity of the swing bolster is used as an air chamber of the secondary air springs with the two underlying sleeper beams, and the bottoms of the two ends of the swing bolster are provided with interfaces connected with air inlets and air outlets of the secondary air springs with the two underlying sleeper beams; two end parts of the swing bolster are fixedly connected with two swing bolster traction pull rod seats which hang downwards in a rotational symmetry mode around the mass center of the swing bolster, the lower end face of the middle of the swing bolster is fixedly connected with a transverse damper seat, the side wall of the middle of the swing bolster is fixedly connected with two vertical damper seats in a rotational symmetry mode, one side, close to the swing bolster traction pull rod seat, of the side wall of the middle of the swing bolster is fixedly connected with two swing bolster transverse stop seats in a rotational symmetry mode, and the center of the swing bolster is provided with a center pin hole;

the two sleeper beam underlying secondary air springs are correspondingly placed on the two structural overhead spring mounting seats one by one and are positioned at the bottoms of two ends of the swing bolster; one end of each traction pull rod is fixedly connected to the swing bolster traction pull rod seat through a rubber node, and the other end of each traction pull rod is fixedly connected to the two framework traction pull rod seats through a rubber node; one end of the sleeper beam underlying transverse shock absorber is fixedly connected to the transverse shock absorber seat through a rubber node, and the other end of the sleeper beam underlying transverse shock absorber is fixedly connected to a corresponding framework transverse shock absorber seat through a rubber node; one ends of the two vertical shock absorbers are fixedly connected to the vertical shock absorber seat through rubber nodes, and the other ends of the two vertical shock absorbers are fixedly connected to the framework vertical shock absorber seat through rubber nodes; two side bearings are fixedly connected to the upper end face of the swing bolster and are located right above the two sleeper beams underlying secondary air springs.

The outer diameter of the gear box mounting shaft section of the axle is reduced to 80% of the original value to form a small-diameter gear box mounting shaft section; the inside of the easy-to-withdraw shaft type gear box also comprises an easy-to-withdraw shaft type large gear bearing inner ring radial thickening sleeve and two large gear bearing end covers provided with screw hole arrays;

the inner diameter of the radial thickening sleeve of the inner ring of the easy-to-withdraw shaft type large gear bearing is the same as the outer diameter of the mounting shaft section of the small-diameter gear box, and the inner diameter and the outer diameter are coaxially and fixedly connected through press mounting; the inner ring of the bull gear bearing on the bull gear bearing is coaxially and fixedly connected on the outer diameter of the radial thickening sleeve of the inner ring of the easy-to-withdraw shaft type bull gear bearing through press fitting; the axial direction outer circumferential end face of the axial direction thickening sleeve of the inner ring of the easy-to-withdraw large gear bearing is provided with a screw hole array which is arranged along the axial direction, two large gear bearing end covers are fixedly connected to the front end face and the rear end face of the axial direction thickening sleeve of the inner ring of the easy-to-withdraw large gear bearing through bolt groups which are arranged along the circumferential direction respectively, and the front end face and the rear end face of the large gear bearing are sealed in the axle mounting hole; the flange of the gear box electric brush mechanism is fixedly connected with the corresponding screw hole on the outer diameter side wall of the axle mounting hole through a plurality of bolts.

The flexible interconnection connecting mechanism is a steel spring combined type rubber node or a joint ball bearing.

The steel spring combined type rubber node comprises two steel spring node flange plates, a rubber elastic core shaft and a double-layer steel spring ring group, wherein the double-layer steel spring ring group is coaxially sleeved on the outer diameter of the rubber elastic core shaft, and two ends of the double-layer steel spring ring group and two ends of the rubber elastic core shaft are respectively and coaxially fixedly connected with one corresponding steel spring node flange plate; the double-layer steel spring ring group comprises a large-diameter outer ring steel spring and a small-diameter inner ring steel spring which are coaxially nested.

The joint ball bearing comprises a joint ball bearing side beam end connecting flange, a joint ball bearing crossbeam end connecting flange, a ball bearing outer ring, a ball bearing inner ring, a ball bearing dustproof end cover, a buckled ball socket retaining frame group and a self-lubricating ring groove ball hinge, wherein a ball socket is arranged in the buckled ball socket retaining frame group, and the self-lubricating ring groove ball hinge is embedded in the ball socket of the buckled ball socket retaining frame group and forms a rotary friction pair with the ball socket; the ball bearing inner ring is coaxially nested on the inner diameter side wall of the central shaft hole of the self-lubricating ring groove ball hinge to form interference fit, and the ball bearing outer ring is coaxially nested on the outer diameter side wall of the buckled ball socket retainer group to form interference fit;

the joint ball bearing beam end connecting flange is coaxially plugged on the rear end face of a central shaft hole of the self-lubricating ring groove ball hinge and is fixedly connected with an adjacent integrated beam through a bolt; the joint ball bearing side beam end connecting flange is coaxially blocked at the front ends of the buckled ball socket retainer group and the self-lubricating ring groove ball hinge and is fixedly connected with an adjacent interconnection butt joint seat through bolts; the ball bearing dustproof end cover is fixedly connected to the outer end face of the joint ball bearing side beam end connecting flange through bolts.

The buckling type ball socket retainer group comprises a first half ball socket retainer and a second half ball socket retainer which are completely identical and are buckled and fixedly connected with each other, and a retainer circumferential ring groove is arranged on the outer diameter of a buckled circumferential boundary line of the first half ball socket retainer and the second half ball socket retainer; and a plurality of retainer radial through holes pointing to the ball socket mass center are uniformly distributed on the bottom surface of the ring groove of the retainer circumferential ring groove according to the same circumferential angle.

An equatorial plane ring groove superposed with an axial vertical plane of the self-lubricating ring groove spherical hinge is arranged on the outer spherical surface of the self-lubricating ring groove spherical hinge, a plurality of weft ring grooves forming gamma included angles with the plane where the equatorial plane ring groove is located are further arranged on the outer spherical surface of the self-lubricating ring groove spherical hinge, the included angle gamma ranges from 10 degrees to 50 degrees, and the optimal value is 30 degrees; the equatorial ring groove and the plurality of weft ring grooves are intersected at the spherical pole.

The invention has the following beneficial effects:

the bogie based on the flexible interconnection frameworks and the overhead swing bolster breaks through the traditional structure and idea limitations of the conventional bogie through a plurality of innovative layout designs, the main structure of each transverse and longitudinal integrated framework is formed by integrated side beams and integrated cross beams which are integrally formed by casting technology, the integrated cross beams are connected with the middle sections of the integrated side beams in the included angle posture of an alpha angle, and the interconnection butt-joint seats and the integrated cross beams are symmetrically distributed on the left side and the right side of the vertical plane in the middle sections of the side beams. The two horizontal and vertical integrated frameworks are symmetrically arranged in a circumferential rotationally symmetrical layout mode, and are flexibly connected through the end heads of the respective integrated cross beams and the flexible interconnection connecting mechanism on the integrated side beam of the other side, so that the horizontal and vertical integrated flexible interconnection frameworks are formed together. The structure can adapt to the irregularity of the track through flexible deflection, and is favorable for reducing the wheel load shedding rate and enhancing the curve passing capacity of the framework. In the design scheme, the transverse and longitudinal integrated frameworks integrally formed by casting technology enable the main structure of the metro bogie disclosed by the invention to avoid the procedures of parallel positioning and assembly welding of traditional welding type side beam wall plates. The flexible interconnection connecting mechanism can adopt flexible connecting components with certain rigidity and elastic deformation capacity, such as steel spring combined rubber nodes or joint ball bearings and the like, the flexible connecting component technology combines two transverse and longitudinal integrated framework main body structures which are symmetrically arranged in a circumferential rotation symmetrical layout mode to change the old H-shaped framework form of vertically connecting two side beams through two thick cross beams on the traditional bogie, so that the two transverse and longitudinal integrated frameworks of the invention can automatically adapt to the angle deflection of mutual distortion, stretching, side inclination and the like generated in the advancing process of the frameworks, and the additional correction and adjustment operation of the transverse beam pipe of an old welding part is not needed to correct the structural dimension deviation of multiple asymmetries, such as stretching, distortion, side inclination and the like in different dimensions and directions in the welding and cooling process, thereby overcoming the inherent process difficulty that the side beam group must be corrected through heavy and complex mapping and adjustment operation during the welding process, the assembly operation flow between the side beam and the cross beam is simplified and optimized in a low-increasing degree. The structural form that two horizontal and vertical integrated frameworks are flexibly connected through the flexible interconnection connecting mechanism and are symmetrically arranged in the circumferential rotational symmetry layout mode also greatly reduces the overall vibration reduction requirement of the framework, and the effects of reducing the number of parts and the failure rate, releasing the layout space of the motor and the gear box and overhauling operation allowance, simplifying the size of the framework and simplifying the manufacturing process are achieved.

The gearbox hanging seat and the gearbox vertical stopping block are sequentially and fixedly connected on the inner side wall of the cantilever section of the bird wing-shaped side beam along the same plumb line, the easy-to-withdraw shaft type gearbox is coaxially arranged on the gearbox mounting shaft section of an axle, the casing vertical hanging rod seat at the farthest end of the casing of the easy-to-withdraw shaft type gearbox is only hung and connected on the gearbox hanging seat through a gearbox hanging rod of which the upper end and the lower end are provided with rubber damping gaskets, so that the easy-to-withdraw shaft type gearbox is applied with anti-rotation resistance around the axle by the maximum rotation moment, the gearbox casing vertical stopping block at the middle part of the far end of the easy-to-withdraw shaft type gearbox is positioned above the casing vertical hanging rod seat, the rotation radius of the gearbox vertical stopping block relative to the axle mounting hole axis is slightly smaller than that of the casing vertical hanging rod seat, and a movable gap of about 100, and the maximum value of the rotary displacement of the vertical stop block of the gear box shell is limited. On the other hand, similar to the suspension mode of the easy-to-withdraw shaft type gear box, the motor single-point suspension seat, the motor vertical limit stop and the framework vertical shock absorber seat are all positioned on the wing-shaped side beam cantilever section adjacent to one side where the interconnection butt joint seat is positioned, the lower part of the rear end cover of the side beam single-point suspension type motor shell is fixedly connected to the motor single-point suspension seat through a side beam end motor suspension rubber node and a motor suspension rubber node semi-ring hoop, and the motor vertical cantilever stop rod is suspended right above the motor vertical limit stop; meanwhile, a motor shell positioned at the end of the motor output shaft on the side beam single-point suspension type motor is fixedly connected to four motor flexible suspension rubber node seat holes in an elastic suspension mode through four motor flexible suspension rubber nodes respectively. The suspension mode of the easy-to-withdraw shaft type gear box and the side beam single-point suspension type motor enables the weight and the vibration load of the easy-to-withdraw shaft type gear box and the side beam single-point suspension type motor to be completely borne by the integrated side beam and the axle, and the structure abandons the old motor installation mode of a large-size rigid connection mode which is supported on the integral cross beam body or the cross beam body in a shape of Chinese character jing and is completely connected with the motor hanging seat and the gear box hanging seat, so that the process requirements on the structural strength, the symmetry precision and the group precision of the cross beam are reduced, and the complexity of. The design scheme not only reduces the occupied degree of the rigid large-size hanging seat structure to the inner side part of the side beam of the framework originally, but also enables the axle-hung wheel to be installed on the built-in axle box. The design also reserves enough operating space for the disassembly and the overhaul of the gear box and the motor structure, greatly optimizes the assembly and disassembly scheme of the motor, the easy-to-withdraw shaft type gear box is fixedly connected with four motor flexible suspension rubber node seat holes distributed according to an isosceles trapezoid on the same side of the gear box shell at the periphery of a motor coupler mounting hole of the gear box, the centers of two motor flexible suspension rubber node seat holes positioned below are respectively provided with an included angle beta of 100-140 degrees with the hole center connecting line of the motor coupler mounting hole, and a frame traction pull rod seat is fixedly connected on the outer side wall in the middle part of the middle section of the side beam, so that after the four motor flexible suspension rubber nodes and the fastening bolts of the motor suspension rubber nodes at the ends of the side beam are respectively dismantled, the side beam single-point suspension motor can be directly and independently dismantled from the lower part of the vehicle body through an overhaul trench, the old mode that the traction motor can be dismantled from the upper part of the frame after the vehicle lifting machine, the motor overhauling convenience is greatly improved.

The integrated vibration reduction type swing bolster and the secondary suspension system are positioned above the horizontal and vertical integrated flexible interconnection framework and are correspondingly connected with the horizontal and vertical integrated flexible interconnection framework, the swing bolster is of a box-type structure, an inner cavity of the swing bolster is used as an air chamber of two secondary air springs with two underneath sleeper beams, and the bottoms of two ends of the swing bolster are provided with interfaces connected with air inlets and air outlets of the two secondary air springs with two underneath sleeper beams; two end parts of the swing bolster are fixedly connected with two swing bolster traction pull rod seats which hang downwards in a rotational symmetry mode around the mass center of the swing bolster, the lower end face of the middle of the swing bolster is fixedly connected with a transverse damper seat, the side wall of the middle of the swing bolster is fixedly connected with two vertical damper seats in a rotational symmetry mode, one side, close to the swing bolster traction pull rod seat, of the side wall of the middle of the swing bolster is fixedly connected with two swing bolster transverse stop seats in a rotational symmetry mode, and the center of the swing bolster is provided with a center pin hole; the two sleeper beam underlying secondary air springs are correspondingly placed on the two structural overhead spring mounting seats one by one and are positioned at the bottoms of two ends of the swing bolster; one end of each traction pull rod is fixedly connected to the swing bolster traction pull rod seat through a rubber node, and the other end of each traction pull rod is fixedly connected to the two framework traction pull rod seats through a rubber node; one end of the sleeper beam underlying transverse shock absorber is fixedly connected to the transverse shock absorber seat through a rubber node, and the other end of the sleeper beam underlying transverse shock absorber is fixedly connected to a corresponding framework transverse shock absorber seat through a rubber node; one ends of the two vertical shock absorbers are fixedly connected to the vertical shock absorber seat through rubber nodes, and the other ends of the two vertical shock absorbers are fixedly connected to the framework vertical shock absorber seat through rubber nodes; two side bearings are fixedly connected to the upper end face of the swing bolster and are located right above the two sleeper beams underlying secondary air springs. The integrated damping type swing bolster and the secondary suspension system directly integrate various damping buffer components with the integrated damping type swing bolster and the secondary suspension system, greatly reduces the connecting process of the components such as the prior secondary transverse shock absorber, two air springs, two secondary vertical shock absorbers, an anti-rolling torsion bar and the like and a vehicle body, can realize the rapid falling of a carriage and a framework to be paired, shortens the occupied time of a crown block and a car lifting jack, improves the turnover efficiency of a production line, and is convenient for independent replacement and maintenance. The integrated vibration damping type swing bolster and the secondary suspension system also enable the two sleeper beam underlying type secondary air springs, the sleeper beam underlying type transverse vibration absorbers and the two vertical vibration absorbers to be directly connected to the lower portion of the swing bolster through the transverse and longitudinal integrated flexible interconnection framework of the invention instead of being directly connected to the lower portion of a vehicle body from the framework like the traditional secondary suspension device of a bogie, so that the respective length requirements of the two system vibration damping buffer components are greatly reduced, the manufacturing cost is reduced, and the strength is improved. In addition, when the integrated vibration-damping type swing bolster and the secondary suspension system are used together with the transverse-longitudinal integrated flexible interconnection framework and the built-in axle box of the hoop axle-hung wheel pair, the three systems form a brand-new comprehensive vibration-damping structure together, vertical and longitudinal torques generated by the side rolling motion of a vehicle body can be fully released, all the vibrations of transverse, longitudinal, vertical, snaking torsion, side rolling and the like generated by a motor and a gear box are effectively eliminated, and further a more ideal anti-side rolling balance effect is achieved, so that the vibration influence degree of a bogie on the vehicle body is reduced to the minimum, the balance stability and comfort of the vehicle body are enhanced, the fatigue loss of the whole structure is effectively reduced, and the whole service life of the bogie and the vehicle body is greatly prolonged.

The invention reduces the outer diameter of the gear box mounting shaft section on the original axle to 80 percent of the original value to form a small-diameter gear box mounting shaft section; the newly added radial thickening sleeve of the inner ring of the easy-to-withdraw shaft type large gear bearing is coaxially nested on the outer diameter of the mounting shaft section of the small-diameter gear box in an interference press-fitting mode, and the inner ring of the large gear bearing on the large gear bearing is coaxially and fixedly connected on the outer diameter of the radial thickening sleeve of the inner ring of the easy-to-withdraw shaft type large gear bearing through press-fitting; the inner ring of the gearwheel bearing which is originally too narrow in the radial direction is turned and thickened by the mode, so that after a retreating baffle on an axle retreating pressure machine is modified into a multi-jaw chuck form, the multi-jaw chuck jaws of the wheel axle retreating pressure machine can be inserted into the gear box from an axle mounting hole on the axial side wall of the gear box, and the anti-channeling stopping acting force is uniformly and reliably applied to the axial outer end face of the shaft-easy-retreating type gearwheel bearing inner ring radial thickening sleeve coaxially and fixedly connected with the gearwheel bearing inner ring, so that the operation process of directly overhauling, lubricating, maintaining and the like the gearwheel in the gear box shell by independently removing the axle from a hole left after the axle is retreated becomes possible on the premise that the gearwheel is not removed from the buckled spliced gear box shell.

The flexible interconnection connecting mechanism can be a steel spring combined type rubber node or a joint ball bearing, and the end of the integrated cross beam can be flexibly and fixedly connected with the interconnection butt joint seat positioned at the middle section of the integrated side beam on the other horizontal and vertical integrated framework in a flange and bolt connection mode. The flexible interconnection connecting mechanism is connected with the framework in a flange mode, so that the mounting efficiency is improved, and meanwhile, the influence of welding deformation on the framework structure is avoided. A ball socket is arranged in the joint ball bearing buckled ball socket retainer group, and a self-lubricating ring groove ball hinge is embedded in the ball socket of the buckled ball socket retainer group and forms a rotary friction pair with the ball socket; the buckled ball socket retainer group comprises a first hemispherical socket retainer and a second hemispherical socket retainer which are completely identical and are buckled and fixedly connected with each other, and a retainer circumferential ring groove is arranged on the outer diameter of a buckled circumferential boundary line of the first hemispherical socket retainer and the second hemispherical socket retainer; at least four retainer radial through holes pointing to the ball socket mass center are uniformly distributed on the bottom surface of the ring groove of the retainer circumferential ring groove according to the same circumferential angle. In addition, when the buckled ball socket retainer group is made of metal or ceramic materials with higher hardness and carbon rod materials which generate scale powder through friction are embedded in the equatorial plane annular groove and the two weft annular grooves which are distributed on the outer spherical surface of the self-lubricating ring groove ball hinge, the equatorial plane annular groove and the two weft annular grooves on the outer spherical surface of the self-lubricating ring groove ball hinge automatically rub the inner side wall of the ball socket of the buckled ball socket retainer group in the friction pair rotating process of the ball socket, so that the scale powder with the lubricating function is automatically generated through rotation and abrasion, thereby playing the role of self-lubricating of the ball socket. When lubricant containing 3% -5% of molybdenum disulfide is injected into the equatorial ring groove and the two weft ring grooves, the lubricating function can be achieved.

In the process manufacturing indexes of the bogie based on the flexible interconnection framework and the overhead swing bolster, the value range of an included angle alpha between a given integrated cross beam and an integrated side beam is definitely 60 degrees to 90 degrees, and the optimal value of the included angle alpha is 90 degrees; the range of the included angle beta between the center of each of the two lower motor flexible suspension rubber node seat holes and the connecting line of the hole centers of the motor coupler mounting holes is 100-140 degrees, and the optimal value is 120 degrees; the range of an included angle gamma between the weft line ring groove on the outer spherical surface of the self-lubricating ring groove spherical hinge and the plane where the equatorial plane ring groove is located is 10-50 degrees, the optimal value is 30 degrees, the core data ranges are the optimal empirical parameters obtained through a large number of test summaries, the overall vibration characteristic of the bogie can be optimized to the greatest extent, and the method is a crystal and a proof of research and development investment.

In addition, the bogie based on the flexible interconnection framework and the overhead swing bolster is a brand-new bogie design form, the transverse and longitudinal integrated flexible interconnection framework, the easy-to-withdraw shaft type gear box, the side beam single-point suspension type motor and the manufacturing scheme of the integrated vibration reduction type swing bolster and the secondary suspension system are all modularized, and different module units can independently implement standardized production and are beneficial to realizing assembly line manufacturing, so that the production efficiency is greatly improved, the production cost is reduced, and the economic value is created.

Drawings

FIG. 1 is a schematic perspective view of a prior art welded frame truck;

FIG. 2 is a perspective view of a prior art cast frame;

FIG. 3 is a schematic perspective view of a prior art secondary suspension system and a traction mechanism;

FIG. 4 is a schematic illustration of the exploded structure of FIG. 3;

FIG. 5 is a schematic perspective view of a prior art cast frame, secondary suspension and traction mechanism;

FIG. 6 is a schematic view of the assembled relationship of a prior art gearbox and axle;

FIG. 7 is a schematic view showing the assembled relationship of the bull gear and the axle of FIG. 6;

FIG. 8 is an enlarged partial schematic view of FIG. 7;

FIG. 9 is a schematic perspective view of the present invention truck based on a flexible interconnecting frame and an overhead bolster;

FIG. 10 is a schematic illustration of an exploded construction of the present invention truck based on a flexible interconnecting frame and an overhead bolster;

FIG. 11 is a schematic illustration of the integrated vibration damping bolster and secondary suspension system of the present invention;

FIG. 12 is a schematic illustration of the exploded structure of FIG. 11;

FIG. 13 is a schematic structural view of the integrated transverse and longitudinal flexible interconnecting frame of the present invention;

FIG. 14 is a schematic structural view of the integrated transverse and longitudinal flexible interconnecting frame and integrated vibration damping bolster and secondary suspension system of the present invention;

FIG. 15 is a schematic structural view of a shaft-reversing gear box of the present invention;

FIG. 16 is a schematic structural view of an easy-to-retract shaft gearbox, side beam single point undermount motor, and gearbox boom of the present invention;

FIG. 17 is a schematic structural view of an easy-to-retract shaft gearbox and gearbox boom of the present invention;

FIG. 18 is a schematic structural view of an axle, an easily withdrawn shaft type bull gear bearing inner race radial thickening sleeve and a bull gear bearing end cap in the present invention;

FIG. 19 is a schematic axial cross-sectional structural view of the axle, the easy-to-retract shaft bull gear bearing inner race radial thickening sleeve, and the bull gear bearing end cap of the present invention after assembly;

FIG. 20 is a schematic view of the present invention in use with a penetrating multi-jaw chuck for removing an axle from a bull gear;

FIG. 21 is a schematic structural view of a flexible interconnect link and integrated beam of the present invention;

FIG. 22 is a schematic structural view of the flexible interconnection connection of the present invention as a steel spring composite rubber node;

FIG. 23 is an axial cross-sectional structural schematic view of the flexible interconnection connection of the present invention being an articulating ball bearing;

FIG. 24 is an exploded view of the flexible interconnection connection of the present invention in the form of an articulated ball bearing;

FIG. 25 is a schematic view of the snap-together ball-and-socket retainer set and self-lubricating ring groove ball hinge of the present invention;

FIG. 26 is a schematic axial cross-sectional view of a snap-together ball and socket retainer set in accordance with the present invention;

fig. 27 is a front view schematically showing the structure of the self-lubricating ring groove ball hinge of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 9 to 27, the bogie based on the flexible interconnecting framework and the overhead bolster of the invention comprises an axle box, a wheel pair device consisting of wheels and an axle, and is characterized in that the bogie further comprises a transverse and longitudinal integrated flexible interconnecting framework, an easy-to-withdraw shaft type gear box, a side beam single-point suspension type motor and an integrated vibration-damping type bolster and secondary suspension system;

the transverse and longitudinal integrated flexible interconnection framework comprises two transverse and longitudinal integrated frameworks which are rotationally symmetrical with each other, and each transverse and longitudinal integrated framework comprises an integrated side beam 1-1 and an integrated cross beam 1-2 which are integrally formed; the integrated side beam 1-1 comprises two side beam middle sections 1-1-1 which are used as two bird wing connecting parts and are positioned at lower positions and two bird wing-shaped side beam cantilever sections 1-1-2 which are symmetrically and fixedly connected with two ends of the side beam middle sections 1-1-1, and the bird wing-shaped side beam cantilever section 1-1-2 is formed by connecting an upward tilted section and a horizontal extending section which extends horizontally and outwards; the integrated cross beam 1-2 and the middle section of the integrated side beam 1-1 are integrally formed in a casting mode in an included angle posture of an alpha angle; the value range of the included angle alpha is 60 to 90 degrees;

each transverse and longitudinal integrated framework also comprises a framework spring mounting seat 1-3, a framework traction pull rod seat 1-4, a framework transverse stopping seat 1-5, a side beam self-provided gear box hanging seat 1-6, a gear box vertical stopping seat 1-7, two semi-ring clamp type axle box hanging seats 1-8, a motor single-point hanging seat 1-9, a motor vertical limiting stopping seat 1-10, a framework vertical shock absorber seat 1-11, an antenna beam hanging seat 1-12, a framework transverse shock absorber seat 1-13, a flexible interconnection connecting mechanism 1-14 and an interconnection butt joint seat 1-15, the interconnecting butt joint seats 1-15 and the integrated cross beam 1-2 are symmetrically distributed on the left side and the right side of the vertical plane in the middle section 1-1-1 of the side beam, and the flexible interconnecting connection mechanisms 1-14 are inserted into and fixedly connected with the interconnecting butt joint seats 1-15;

a framework spring mounting seat 1-3 is fixedly connected to the upper end of the middle part of the middle section 1-1-1 of the side beam, a framework traction pull rod seat 1-4 is fixedly connected to the outer side wall of the middle part of the middle section 1-1-1 of the side beam, and a framework transverse stopping seat 1-5 is fixedly connected to the upper end of a bird wing-shaped side beam cantilever section 1-1-2 adjacent to one side of the integrated cross beam 1-2; the gearbox hanging seat 1-6 and the gearbox vertical stopping seat 1-7 are sequentially and fixedly connected to the inner side wall of the bird wing-shaped side beam cantilever section 1-1-2 below the root part of the framework transverse stopping seat 1-5 from top to bottom; a motor single-point suspension seat 1-9, a motor vertical limit stop 1-10 and a framework vertical shock absorber seat 1-11 are all positioned on the cantilever section 1-1-2 of the bird-wing-shaped side beam adjacent to one side of the interconnected butt-joint seat 1-15, wherein the framework vertical shock absorber seat 1-11 is fixedly connected to the inner side wall of the lower part of the inclined section 1-1-2 of the bird-wing-shaped side beam, the motor single-point suspension seat 1-9 is fixedly connected to the bottom of the lower end surface of the inclined section 1-1-2 of the bird-wing-shaped side beam, and the motor vertical limit stop 1-10 is fixedly connected to the upper end of the junction of the inclined section 1-1-2 of the bird-wing-shaped side beam and the horizontal extension section; the antenna beam hanging seats 1-12 are arranged on the outer side wall of the farthest end of each bird wing-shaped side beam cantilever section 1-1-2, and the semi-ring clamp type axle box hanging seats 1-8 are arranged at the bottom of the far end of each bird wing-shaped side beam cantilever section 1-1-2; the transverse shock absorber seat 1-13 is fixedly connected with the middle section of the upper end surface of a corresponding integrated beam 1-2;

the four annular vibration reduction axle boxes are arranged on the inner side of the wheel c and are coaxially and rotatably connected to the two ends of the axle, inner rings of axle bearings 1-2 of the annular vibration reduction axle boxes are coaxially pressed and fixedly connected to the two ends of the axle, and the annular vibration reduction axle boxes are arranged below the end parts of the cantilever sections 1-1-2 of the bird wing-shaped side beams through the matching of semi-annular shells 1-1 and semi-ring clamp type axle box hanging seats 1-8;

the easy-to-withdraw shaft type gear box is pressed on a gear box mounting shaft section 1-1 of the axle, and one side of the easy-to-withdraw shaft type gear box is connected to a gear box lifting seat 1-6 through a gear box lifting rod;

one side of the side beam single-point suspension type motor is fixedly connected to the motor single-point suspension seats 1-9, and the other side of the side beam single-point suspension type motor is elastically connected with the easy-to-withdraw shaft type gear box in a rubber node suspension mode;

the two horizontal and vertical integrated frameworks are symmetrically arranged in a circumferential rotationally symmetrical layout mode, and are flexibly connected with the flexible interconnection connecting mechanism 1-14 on the other integrated side beam 1-1 through the end head of the respective integrated cross beam 1-2, so that the horizontal and vertical integrated flexible interconnection frameworks are jointly formed.

An axle mounting hole 1-1-1 and a motor coupler mounting hole 1-1-2 are formed in the middle of a gearbox shell 1-1 of the easy-to-withdraw shaft type gearbox, four motor flexible suspension rubber node seat holes 1-2 distributed according to an isosceles trapezoid are fixedly connected to the same side of the gearbox shell 1-1 at the periphery of the motor coupler mounting hole 1-1-2, an included angle beta formed by connecting the centers of two lower motor flexible suspension rubber node seat holes 1-2 and a hole center connecting line of the motor coupler mounting holes 1-1-2 is 100-140 degrees, and the optimal value is 120 degrees; a gear box shell vertical stop block 1-4 is fixedly connected to the outer side wall of the gear box shell 1-1 at the intersection of the extension line of the central connecting line of the axle mounting hole 1-1-1 and the motor coupling mounting hole 1-1-2 and the gear box shell 1-1; the outer side wall of the gearbox shell 1-1 below the gearbox shell vertical stop block 1-4 is fixedly connected with a shell vertical hanging rod seat 1-3, and two ends of the gearbox hanging rod are respectively provided with a rubber vibration damping gasket which is used for elastically connecting the shell vertical hanging rod seat 1-3 with the gearbox hanging seat 1-6.

The lower part of the rear end cover of the side beam single-point suspension type motor shell is fixedly connected to a motor single-point suspension seat 1-9 through a side beam end motor suspension rubber node 1-1 and a motor suspension rubber node semi-ring hoop 1-2, the upper part of the rear end cover of the side beam single-point suspension type motor shell is fixedly connected with a horizontal motor vertical cantilever stop rod 1-4, the motor vertical cantilever stop rod 1-4 is suspended right above a motor vertical limiting stop 1-10, and the range of the gap value between the motor vertical limiting stop rod and the motor vertical limiting stop rod is 10-50 mm; a motor shell positioned at the end of a motor output shaft on the side beam single-point suspension type motor is fixedly connected to four motor flexible suspension rubber node seat holes 1-2 through four motor flexible suspension rubber nodes 1-5 in an elastic suspension mode respectively, and the motor output shaft of the side beam single-point suspension type motor is rotatably connected to a reduction gear mechanism inside the motor coupling mounting hole 1-1-2 through a coupling 1-3.

The integrated damping type swing bolster and secondary suspension system comprises a swing bolster 1-1, two secondary air springs 1-2 arranged below two bolster beams, two traction pull rods 1-3, transverse dampers 1-4 arranged below the bolster beams, two vertical dampers 1-5 and two side bearings 1-6; the swing bolster 1-1 is of a box-shaped structure, an inner cavity of the swing bolster is used as an air chamber of two sleeper beam underlying secondary air springs 1-2, and the bottoms of two ends of the swing bolster 1-1 are provided with interfaces connected with air inlets and air outlets of the two sleeper beam underlying secondary air springs 1-2; two end parts of the swing bolster 1-1 are fixedly connected with two swing bolster traction pull rod seats 1-1-1 which are suspended downwards in a rotational symmetry manner around the mass center of the swing bolster 1-1, the lower end surface of the middle part of the swing bolster 1-1 is fixedly connected with a transverse damper seat 1-1-2, the side wall of the middle part of the swing bolster 1-1 is fixedly connected with two vertical damper seats 1-1-3 in a rotational symmetry manner, one side of the side wall of the middle part of the swing bolster 1-1, which is close to the swing bolster traction pull rod seats 1-1, is fixedly connected with two swing bolster transverse stop seats 1-1-4 in a rotational symmetry manner, and the center of the swing bolster 1-1 is provided with a center;

the two sleeper beam underlying secondary air springs 1-2 are correspondingly arranged on the two frame spring mounting seats 1-3 one by one and are positioned at the bottoms of two ends of the swing bolster 1-1; one end of each of the two traction pull rods 1-3 is fixedly connected to the bolster traction pull rod seat 1-1-1 through a rubber node, and the other end of each of the two traction pull rods is fixedly connected to the two framework traction pull rod seats 1-4 through a rubber node; one end of a horizontal shock absorber 1-4 arranged below the sleeper beam is fixedly connected to the horizontal shock absorber seat 1-1-2 through a rubber node, and the other end of the horizontal shock absorber is fixedly connected to a corresponding framework horizontal shock absorber seat 1-13 through a rubber node; one ends of the two vertical shock absorbers 1-5 are fixedly connected to the vertical shock absorber seats 1-1-3 through rubber nodes, and the other ends of the two vertical shock absorbers are fixedly connected to the framework vertical shock absorber seats 1-11 through rubber nodes; two side bearings 1-6 are fixedly connected to the upper end face of the swing bolster 1-1 and are positioned right above the two sleeper beams underlying secondary air springs 1-2.

The outer diameter of a gear box mounting shaft section 1-1 of an axle is reduced to 80 percent of the original value to form a small-diameter gear box mounting shaft section 1-3; the inside of the easy-to-withdraw shaft type gear box also comprises an easy-to-withdraw shaft type large gear bearing inner ring radial thickening sleeve 1-7 and two large gear bearing end covers 1-6 provided with screw hole arrays; the inner diameter of the radial thickening sleeve 1-7 of the inner ring of the easy-to-withdraw shaft type large gear bearing is the same as the outer diameter of the mounting shaft section 1-3 of the small-diameter gear box, and the two are coaxially and fixedly connected through press mounting; a bull gear bearing inner ring 1-3-1 on the bull gear bearing 1-3 is coaxially fixedly connected on the outer diameter of an easy-to-withdraw shaft type bull gear bearing inner ring radial thickening sleeve 1-7 through press fitting; the end faces of the radial outer circumference of the radial thickening sleeve 1-7 of the inner ring of the easy-to-withdraw shaft type large gear bearing are provided with screw hole arrays which are arranged along the radial direction of the easy-to-withdraw shaft type large gear bearing, two large gear bearing end covers 1-6 are respectively and fixedly connected to the front end face and the rear end face of the radial thickening sleeve 1-7 of the inner ring of the easy-to-withdraw shaft type large gear bearing through bolt groups which are arranged along the circumference, and the front end face and the rear end face of the large gear bearing 1-3 are sealed in the axle; the flange plates of the electric brush mechanisms 1-8 of the gear box are coaxially and fixedly connected with corresponding screw holes on the outer diameter side wall of the axle mounting hole 1-1-1 through a plurality of bolts.

The flexible interconnection connecting mechanisms 1-14 are steel spring combined type rubber nodes 1-14a or joint ball bearings 1-14 b.

The steel spring combined type rubber node 1-14a comprises two steel spring node flange plates 1-14a-1, a rubber elastic core shaft 1-14a-2 and a double-layer steel spring ring group 1-14a-3, wherein the double-layer steel spring ring group 1-14a-3 is coaxially sleeved on the outer diameter of the rubber elastic core shaft 1-14a-2, and two ends of the double-layer steel spring ring group 1-14a-3 and the rubber elastic core shaft 1-14a-2 are respectively and coaxially fixedly connected with one corresponding steel spring node flange plate 1-14 a-1; the double-layer steel spring ring group 1-14a-3 comprises a large-diameter outer ring steel spring and a small-diameter inner ring steel spring which are coaxially nested.

The joint ball bearing 1-14b comprises a joint ball bearing side beam end connecting flange 1-14b-1, a joint ball bearing cross beam end connecting flange 1-14b-2, a ball bearing outer ring 1-14b-3, a ball bearing inner ring 1-14b-4, a ball bearing dustproof end cover 1-14b-5, a buckled ball socket retainer group 1-14b-6 and a self-lubricating ring groove ball hinge 1-14b-7, wherein a ball socket is arranged in the buckled ball socket retainer group 1-14b-6, and the self-lubricating ring groove ball hinge 1-14b-7 is embedded into the buckled ball socket retainer group 1-14b-6 and forms a rotary friction pair with the ball socket; the ball bearing inner ring 1-14b-4 is coaxially nested on the inner diameter side wall of the central shaft hole of the self-lubricating ring groove ball hinge 1-14b-7 to form interference fit, and the ball bearing outer ring 1-14b-3 is coaxially nested on the outer diameter side wall of the buckled ball socket retainer group 1-14b-6 to form interference fit;

the joint ball bearing beam end connecting flange 1-14b-2 is coaxially plugged on the rear end face of a central shaft hole of the self-lubricating ring groove ball hinge 1-14b-7, and the joint ball bearing beam end connecting flange 1-14b-2 is fixedly connected with an adjacent integrated beam 1-2 through bolts; the joint ball bearing side beam end connecting flange 1-14b-1 is coaxially plugged at the front ends of the buckled ball socket retainer group 1-14b-6 and the self-lubricating ring groove ball hinge 1-14b-7, and the joint ball bearing side beam end connecting flange 1-14b-1 is fixedly connected with the adjacent interconnection butt joint seat 1-15 through bolts; the ball bearing dustproof end cover 1-14b-5 is fixedly connected to the outer end face of the joint ball bearing side beam end connecting flange 1-14b-1 through bolts.

The buckled ball socket retainer group 1-14b-6 comprises a first half ball socket retainer 1-14b-6a and a second half ball socket retainer 1-14b-6b which are completely identical and are buckled and fixedly connected with each other, and a retainer circumferential ring groove 1-14b-6-1 is arranged on the outer diameter of a buckled circumferential boundary line of the first half ball socket retainer and the second half ball socket retainer; a plurality of radial retainer through holes 1-14b-6-2 pointing to the ball socket mass center are uniformly distributed on the bottom surface of the circumferential ring groove 1-14b-6-1 of the retainer according to the same circumferential angle.

An equatorial plane ring groove 1-14b-7-a1 coincident with an axial vertical plane is arranged on the outer spherical surface of the self-lubricating ring groove ball hinge 1-14b-7, a plurality of weft ring grooves 1-14b-7-a2 forming an included angle gamma with the plane where the equatorial plane ring groove 1-14b-7-a1 is located are further arranged on the outer spherical surface of the self-lubricating ring groove ball hinge 1-14b-7-a 7, the value range of the included angle gamma is 10-50 degrees, and the optimal value is 30 degrees; the equatorial ring groove 1-14b-7-a1 and the plurality of weft ring grooves 1-14b-7-a2 intersect at the pole of a sphere.

When the bogie based on the flexible interconnection framework and the overhead swing bolster is specifically applied, the angle alpha value of the included angle between the integrated cross beam 1-2 and the integrated side beam 1-1 is set to be 90 degrees; the center of each of two motor flexible suspension rubber node seat holes 1-2 positioned below and the connecting line of the hole centers of the motor coupler mounting holes 1-1-2 form an included angle beta of 120 degrees, two latitude line ring grooves 1-14b-7-a2 on the outer spherical surface of a self-lubricating ring groove spherical hinge 1-14b-7 are arranged, the two latitude line ring grooves are in mirror symmetry with the equatorial plane ring groove 1-14b-7-a1, and the plane where the two latitude line ring grooves and the equatorial plane ring groove 1-14b-7-a1 are located form an angle gamma of 30 degrees. The number of the retainer radial through holes 1-14b-6-2 on the bottom surface of the ring groove of the retainer circumferential ring groove 1-14b-6-1 is four, and the four through holes are distributed on the circumference of the retainer circumferential ring groove 1-14b-6-1 at intervals of a circumferential angle of 90 degrees.

Claims

1. The bogie based on the flexible interconnection framework and the overhead swing bolster comprises an axle box (B) and a wheel pair device consisting of wheels (c) and an axle (D), and is characterized by further comprising a transverse and longitudinal integrated flexible interconnection framework (A), an easy-to-withdraw shaft type gear box (D), a side beam single-point suspension type motor (E), an integrated vibration reduction type swing bolster and a secondary suspension system (F);

the transverse and longitudinal integrated flexible interconnection framework (A) comprises two transverse and longitudinal integrated frameworks which are rotationally symmetrical with each other, and each transverse and longitudinal integrated framework comprises an integrated side beam (A-1) and an integrated cross beam (A-2); the integrated side beam (A-1) comprises two side beam middle sections (A-1-1) which are used as two bird wing connecting parts and are positioned at lower positions and two bird wing-shaped side beam cantilever sections (A-1-2) which are symmetrically and fixedly connected with the two ends of the side beam middle sections (A-1-1), and the bird wing-shaped side beam cantilever section (A-1-2) is formed by connecting an upward tilted section and a horizontal extension section which extends horizontally and outwards; the integrated cross beam (A-2) and the middle section of the integrated side beam (A-1) are integrally formed in a casting mode in an included angle posture of an alpha angle; the value range of the included angle alpha is 60 to 90 degrees;

each transverse and longitudinal integrated framework also comprises a framework spring mounting seat (A-3), a framework traction pull rod seat (A-4), a framework transverse stopping seat (A-5), a side beam self-provided gear box hanging seat (A-6), a gear box vertical stopping seat (A-7), two semi-ring clamp type axle box hanging seats (A-8), a motor single-point hanging seat (A-9), a motor vertical limiting stopping seat (A-10), a framework vertical shock absorber seat (A-11), an antenna beam hanging seat (A-12), a framework transverse shock absorber seat (A-13), a flexible interconnection connecting mechanism (A-14) and an interconnection butt joint seat (A-15), wherein the interconnection butt joint seat (A-15) and the integrated cross beam (A-2) are symmetrically distributed on the left side and the right side of a median plane of the middle section (A-1-1), the flexible interconnection connecting mechanism (A-14) is inserted into and fixedly connected with the interconnection butt joint seat (A-15);

the framework transverse stopping seat (A-5) is fixedly connected with the upper end of a bird wing-shaped side beam cantilever section (A-1-2) adjacent to one side of the integrated cross beam (A-2); the gearbox hanging seat (A-6) and the gearbox vertical stopping block (A-7) are sequentially and fixedly connected to the inner side wall of the bird wing-shaped side beam cantilever section (A-1-2) below the root of the framework transverse stopping seat (A-5) from top to bottom; the motor single-point suspension seat (A-9), the motor vertical limit stop (A-10) and the framework vertical shock absorber seat (A-11) are all positioned on the wing-shaped side beam cantilever section (A-1-2) adjacent to one side of the interconnected butt joint seat (A-15), wherein the framework vertical shock absorber seat (A-11) is fixedly connected to the inner side wall of the lower part of the inclined section of the wing-shaped side beam cantilever section (A-1-2), the motor single-point suspension seat (A-9) is fixedly connected to the bottom of the lower end face of the inclined section of the wing-shaped side beam cantilever section (A-1-2), and the motor vertical limit stop (A-10) is fixedly connected to the upper end of the junction of the inclined section and the horizontal extending section of the wing-shaped side beam cantilever section (A-1-2); the antenna beam hanging seats (A-12) are arranged on the outer side wall of the farthest end of each bird wing-shaped side beam cantilever section (A-1-2), and the semi-ring clamp type axle box hanging seats (A-8) are arranged at the bottom of the far end of each bird wing-shaped side beam cantilever section (A-1-2); the transverse shock absorber seat (A-13) is fixedly connected with the middle section of the upper end surface of a corresponding integrated beam (A-2);

the easy-to-withdraw shaft type gear box (D) is pressed on a gear box mounting shaft section (D-1) of the axle (D), and one side of the easy-to-withdraw shaft type gear box (D) is connected to a gear box hanging seat (A-6) through a gear box hanging rod (H);

one side of a side beam single-point suspension type motor (E) is fixedly connected to a motor single-point suspension seat (A-9), and the other side of the side beam single-point suspension type motor (E) is elastically connected with an easy-to-withdraw shaft type gear box (D) in a rubber node suspension mode;

the integrated vibration damping type swing bolster and secondary suspension system (F) is positioned above the transverse and longitudinal integrated flexible interconnection framework (A) and correspondingly connected with the transverse and longitudinal integrated flexible interconnection framework (A);

the two horizontal and vertical integrated frameworks are symmetrically arranged in a circumferential rotationally symmetrical layout mode, and are flexibly connected through the end head of the respective integrated transverse beam (A-2) and the flexible interconnection connecting mechanism (A-14) on the other integrated side beam (A-1), so that the horizontal and vertical integrated flexible interconnection frameworks (A) are formed together.

2. The bogie based on the flexible interconnected framework and the overhead bolster as claimed in claim 1, wherein an axle mounting hole (D-1-1) and a motor coupler mounting hole (D-1-2) are formed in the middle of a gearbox shell (D-1) of the easy-to-retract shaft type gearbox (D), four motor flexible suspension rubber node seat holes (D-2) distributed in an isosceles trapezoid shape are fixedly connected to the same side of the gearbox shell (D-1) on the periphery of the motor coupler mounting hole (D-1-2), an included angle β between the center of each of the two lower motor flexible suspension rubber node seat holes (D-2) and a hole center connecting line of the motor coupler mounting hole (D-1-2) is 100-140 degrees, and the optimal value is 120 degrees; a gear box shell vertical stop block (D-4) is fixedly connected to the outer side wall of the gear box shell (D-1) at the intersection of the extension line of the central connecting line of the axle mounting hole (D-1-1) and the motor coupling mounting hole (D-1-2) and the gear box shell (D-1); the outer side wall of the gearbox shell (D-1) below the vertical stop block (D-4) of the gearbox shell is fixedly connected with a shell vertical lifting rod seat (D-3), and two ends of a gearbox lifting rod (H) are respectively provided with a rubber vibration reduction gasket which is used for elastically connecting the shell vertical lifting rod seat (D-3) with the gearbox lifting seat (A-6).

3. The bogie based on the flexible interconnected framework and the overhead swing bolster as claimed in claim 2, wherein the lower part of the rear end cover of the shell of the side beam single-point suspension type motor (E) is fixedly connected to the motor single-point suspension seat (A-9) through a side beam end motor suspension rubber node (E-1) and a motor suspension rubber node semi-ring clamp (E-2), the upper part of the rear end cover of the shell of the side beam single-point suspension type motor (E) is fixedly connected with a horizontal motor vertical cantilever stop rod (E-4), and the motor vertical cantilever stop rod (E-4) is suspended right above a motor vertical limit stop (A-10), and the gap value of the two is 10-50 mm; a motor shell at the end of a motor output shaft on a side beam single-point suspension type motor (E) is fixedly connected to four motor flexible suspension rubber node seat holes (D-2) in an elastic suspension mode through four motor flexible suspension rubber nodes (D-5), and the motor output shaft of the side beam single-point suspension type motor (E) is rotatably connected to a reduction gear mechanism inside a motor coupler mounting hole (D-1-2) through a coupler (E-3).

4. The flexible interconnected frame and overhead bolster based bogie as claimed in claim 1, wherein said integrated dampened bolster and secondary suspension system (F) comprises a bolster (F-1), two bolster below secondary air springs (F-2), two traction links (F-3), bolster below lateral shock absorbers (F-4), two vertical shock absorbers (F-5) and two side bearings (F-6); the swing bolster (F-1) is of a box-shaped structure, an inner cavity of the swing bolster is used as an air chamber of the secondary air spring (F-2) with two underlying sleeper beams, and the bottoms of the two ends of the swing bolster (F-1) are provided with interfaces connected with air inlets and air outlets of the secondary air spring (F-2) with two underlying sleeper beams; two end parts of the swing bolster (F-1) are fixedly connected with two swing bolster traction pull rod seats (F-1-1) which are hung downwards in a rotational symmetry manner around the mass center of the swing bolster (F-1), the lower end surface of the middle part of the swing bolster (F-1) is fixedly connected with a transverse damper seat (F-1-2), the side wall of the middle part of the swing bolster (F-1) is fixedly connected with two vertical damper seats (F-1-3) in a rotational symmetry manner, one side of the side wall of the middle part of the swing bolster (F-1), which is close to the swing bolster traction pull rod seat (F-1-1), is fixedly connected with two swing bolster transverse stop seats (F-1-4) in a rotational symmetry manner, and the center of the swing bolster (F-1) is provided;

the two sleeper beam underlying secondary air springs (F-2) are correspondingly arranged on the two overhead spring mounting seats (A-3) one by one and are positioned at the bottoms of the two ends of the swing bolster (F-1); one end of each of the two traction pull rods (F-3) is fixedly connected to the swing bolster traction pull rod seat (F-1-1) through a rubber node, and the other end of each of the two traction pull rods (F-3) is fixedly connected to the two framework traction pull rod seats (A-4) through a rubber node; one end of a horizontal shock absorber (F-4) arranged below the sleeper beam is fixedly connected to the horizontal shock absorber seat (F-1-2) through a rubber node, and the other end of the horizontal shock absorber is fixedly connected to a corresponding framework horizontal shock absorber seat (A-13) through a rubber node; one ends of the two vertical shock absorbers (F-5) are fixedly connected to the vertical shock absorber seats (F-1-3) through rubber nodes, and the other ends of the two vertical shock absorbers are fixedly connected to the framework vertical shock absorber seats (A-11) through rubber nodes; two side bearings (F-6) are fixedly connected with the upper end surface of the swing bolster (F-1) and are positioned right above the two sleeper beams underlying secondary air springs (F-2).

5. The flexible interconnecting frame and overhead bolster based bogie as claimed in claim 1, wherein the outer diameter of the gear box mounting shaft section (d-1) of the axle (d) is reduced to 80% of the original value, forming a small diameter gear box mounting shaft section (d-3); the inside of the easy-to-withdraw shaft type gear box (D) also comprises an easy-to-withdraw shaft type large gear bearing inner ring radial thickening sleeve (D-7) and two large gear bearing end covers (D-6) provided with screw hole arrays;

the inner diameter of the radial thickening sleeve (D-7) of the inner ring of the easy-to-withdraw shaft type large gear bearing is the same as the outer diameter of the small-diameter gear box mounting shaft section (D-3), and the inner diameter and the outer diameter are coaxially and fixedly connected through press mounting; a bull gear bearing inner ring (s-3-1) on the bull gear bearing (s-3) is coaxially and fixedly connected on the outer diameter of the axial-direction thickening sleeve (D-7) of the easy-to-withdraw shaft type bull gear bearing inner ring through press fitting; the radial outer circumferential end face of the easy-to-withdraw shaft type large gear bearing inner ring radial thickening sleeve (D-7) is provided with a screw hole array which is arranged along the radial direction of the easy-to-withdraw shaft type large gear bearing inner ring radial thickening sleeve, two large gear bearing end covers (D-6) are fixedly connected to the front end face and the rear end face of the easy-to-withdraw shaft type large gear bearing inner ring radial thickening sleeve (D-7) through bolt groups which are arranged along the circumferential array respectively, and the front end face and the rear end face of the large gear bearing (s-3) are sealed in the axle mounting hole (D; the flange plates of the gear box electric brush mechanism (D-8) are coaxially and fixedly connected with corresponding screw holes on the outer diameter side wall of the axle mounting hole (D-1-1) through a plurality of bolts.

6. The bogie based on flexible interconnection frame and overhead bolster according to claim 1, characterized in that the flexible interconnection connection mechanism (a-14) is a steel spring combination rubber node (a-14a) or a joint ball bearing (a-14 b).

7. The bogie based on the flexible interconnected frame and the overhead bolster according to claim 6, wherein the steel spring combined type rubber node (A-14a) comprises two steel spring node flanges (A-14a-1), a rubber elastic core shaft (A-14a-2) and a double-layer steel spring ring group (A-14a-3), the double-layer steel spring ring group (A-14a-3) is coaxially sleeved on the outer diameter of the rubber elastic core shaft (A-14a-2), and two ends of the double-layer steel spring ring group (A-14a-3) and the rubber elastic core shaft (A-14a-2) are coaxially fixedly connected with a corresponding steel spring node flange (A-14 a-1); the double-layer steel spring ring group (A-14a-3) comprises a large-diameter outer ring steel spring and a small-diameter inner ring steel spring which are coaxially nested.

8. A bogie based on a flexible interconnecting frame and an overhead bolster as claimed in claim 6, the joint ball bearing (A-14b) comprises a joint ball bearing side beam end connecting flange (A-14b-1), a joint ball bearing transverse beam end connecting flange (A-14b-2), a ball bearing outer ring (A-14b-3), a ball bearing inner ring (A-14b-4), a ball bearing dustproof end cover (A-14b-5), a buckled ball socket retainer group (A-14b-6) and a self-lubricating ring groove ball hinge (A-14b-7), a ball socket is arranged in the buckled ball socket retainer group (A-14b-6), and a self-lubricating ring groove ball hinge (A-14b-7) is embedded in the ball socket of the buckled ball socket retainer group (A-14b-6) and forms a rotary friction pair with the ball socket; the ball bearing inner ring (A-14b-4) is coaxially nested on the inner diameter side wall of the central shaft hole of the self-lubricating ring groove ball hinge (A-14b-7) to form interference fit, and the ball bearing outer ring (A-14b-3) is coaxially nested on the outer diameter side wall of the buckled ball socket retainer group (A-14b-6) to form interference fit;

the joint ball bearing beam end connecting flange (A-14b-2) is coaxially plugged on the rear end face of a central shaft hole of the self-lubricating ring groove spherical hinge (A-14b-7), and the joint ball bearing beam end connecting flange (A-14b-2) is fixedly connected with an adjacent integrated beam (A-2) through bolts; the joint ball bearing side beam end connecting flange (A-14b-1) is coaxially plugged at the front ends of the buckling type ball socket retainer group (A-14b-6) and the self-lubricating ring groove ball hinge (A-14b-7), and the joint ball bearing side beam end connecting flange (A-14b-1) is fixedly connected with an adjacent interconnection butt joint seat (A-15) through bolts; the ball bearing dustproof end cover (A-14b-5) is fixedly connected to the outer end face of the joint ball bearing side beam end connecting flange (A-14b-1) through bolts.

9. The flexible interconnecting frame and overhead bolster-based bogie according to claim 8, wherein said snap-fit ball-and-socket retainer group (a-14b-6) comprises a first half ball-and-socket retainer (a-14b-6a) and a second half ball-and-socket retainer (a-14b-6b) which are identical and fixedly fastened to each other, and a retainer circumferential ring groove (a-14b-6-1) is formed on the outer diameter of the circumferential boundary line where the two are fastened; a plurality of radial retainer through holes (A-14b-6-2) pointing to the ball socket center of mass are uniformly distributed on the bottom surface of the circumferential ring groove (A-14b-6-1) of the retainer according to the same circumferential angle.

10. The bogie based on flexible interconnected frames and overhead bolster according to claim 8, characterized in that the outer spherical surface of the self-lubricating ring groove ball hinge (a-14b-7) is provided with an equatorial ring groove (a-14b-7-a1) coinciding with its axial vertical plane, the outer spherical surface of the self-lubricating ring groove ball hinge (a-14b-7) is further provided with a plurality of latitudinal ring grooves (a-14b-7-a2) forming an included angle γ with the plane where the equatorial ring groove (a-14b-7-a1) is located, the included angle γ ranges from 10 to 50 degrees, and the optimal value is 30 degrees; the equatorial ring groove (A-14b-7-a1) and the plurality of weft ring grooves (A-14b-7-a2) each intersect at a spherical pole (T).