CN212386496U - Power bogie based on novel motor suspension structure and temperature-measurable axle box - Google Patents

Abstract

A power bogie based on a novel motor suspension structure and a temperature-measurable axle box belongs to the field of power bogie devices of railway vehicles and comprises a framework, a wheel pair device consisting of wheels and axles, four annular vibration-damping axle boxes, an easily-withdrawn axle type gear box and a side beam single-point suspension type motor. The utility model effectively reduces the transverse width size and the turning radius of the whole bogie on the premise of ensuring the mounting position and the damping index of the primary suspension axle box device, further improves the curve passing capacity of the bogie, and is convenient for mounting, dismounting and maintaining the annular damping axle box; the utility model discloses after demolising four fastening bolt respectively, curb girder single-point suspension type motor can directly remove alone from automobile body below via overhauing the trench.

Description

Power bogie based on novel motor suspension structure and temperature-measurable axle box

Technical Field

The utility model belongs to rail vehicle power bogie device field, concretely relates to power bogie based on new-type motor suspended structure and measurable temperature axle box.

Background

When the railway train bogie is designed, not only the structural strength 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 other comprehensive factors 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 an axle, the layout space of the motor and a gear box thereof and the like need to be comprehensively designed according to the theoretical speed per hour, the bearing load, the minimum curve curvature, the road conditions such as the wind, snow, flying stones and the like of the train 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 to 3, the frame of the bogie of the railway passenger car 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 fig. 1 and 2, for a welded side sill formed by assembling and welding a plurality of plates to form a box-shaped structure, a welded side sill i is generally a bird wing-shaped structure with two upturned wings, and a welded axle seat i-2 is fixedly welded to a lower end surface of an inclined plane i-1 at a wing root part of each bird wing-shaped structure. 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. For the cast side beam shown in fig. 3, 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. In addition, the existing cast side beam, the isosceles trapezoid large interface j-1 of the cast side beam j at the wingtip end, is specially designed for matching the axle box form of the axle box f stacked by multiple layers of rubber tiles e on the isosceles trapezoid, and is not suitable for the wheel set external axle box and the typical primary suspension structure corresponding to the axle box.

A railway vehicle bogie primary suspension apparatus for reducing the pitching vibration generated from wheel rails and axles, as shown in fig. 1 and 2, a conventional typical primary suspension apparatus is composed of a tray-type axle box a and a series of steel springs b mounted on the tray-type axle box a, and the upper ends of the series of steel springs b are used for supporting the circular cap cylinders of the ends of the side members of the bogie. Since the typical primary suspension device is mounted to the end of the axle d outside the wheel c, it is called a wheel-set external axle box. However, the axle box with the wheel set arranged externally greatly increases the total axial width of the wheel set, is easier to be impacted by flying sand and broken stone along the railway, increases the integral turning radius of the bogie, and is not beneficial to the improvement of the passing curvature of the minimum curve of the train. Another recent type of primary suspension device is shown in fig. 3, and it overcomes the old technical problem of the axle box with external wheel set by stacking a plurality of layers of rubber tiles e on both sides of the axle box f with isosceles trapezoid shape to form a built-in primary suspension structure of the axle box which can be arranged on the inner side of the wheel c. However, the isosceles trapezoid axle box built-in type primary suspension structure with the rubber piles on the two sides has the disadvantages of complex manufacturing process, complex dismounting and maintenance procedures and high manufacturing and maintenance cost.

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, and the layout position and the welding manufacturing process of the motor hanging seat t and the gear box hanging seat u not only provide higher requirements for 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 axle box layout space, a typical primary suspension device can only be arranged at two end parts of an axle, the risk of damaging an 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 non-detachable rigid structures, so that the lifting lugs of the shell of the traction motor r interfere with the framework and the gear box structure to 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 greatly influence the layout space and structural form of a primary suspension device, a motor and a gear box, so that the layout scheme of the old primary suspension device cannot meet the requirements of installation positions and vibration reduction indexes, the old reference scheme needs to be overturned, and the design improvement of a brand new concept is made.

As shown in figures 7 to 9, the large 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 large 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 large gear bearing inner ring s-3-1 on the large 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 large 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. And axle box mounting journal sections d-2 at two ends of the axle d are coaxially and fixedly connected with bearings C-2 of wheels.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is 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 the welding cooling process can be corrected through additionally added correction and adjustment operations to correct various asymmetric structural dimension deviations of stretching, twisting, side tilting and the like with different dimensions and directions in the welding cooling process, so that the welding quality is barely ensured.

3) The existing cast side beam is specially designed for matching the axle box form of an isosceles trapezoid axle box stacked by multiple layers of rubber tiles, and is not suitable for an external wheel set axle box and a typical primary suspension structure corresponding to the external wheel set axle box.

4) In addition, the isosceles trapezoid axle box built-in type primary suspension structure with the rubber piles on the two sides has complex manufacturing process and complex disassembly, assembly and maintenance procedures, and causes high manufacturing and maintenance cost.

5) 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.

6) 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.

7) 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 utility model provides a technical scheme as follows that above-mentioned technical problem took:

the power bogie comprises a framework and a wheel pair device consisting of wheels and axles, wherein the framework comprises two framework side beams and two framework cross beams, the framework side beams comprise side beam middle sections which are used as two bird wing connecting parts and are positioned at lower positions and two bird wing-shaped side beam cantilever sections which are symmetrically fixedly connected to two ends of the side beam middle sections, and the bird wing-shaped side beam cantilever sections are formed by connecting an upward tilted section and a horizontal extending section which extends horizontally and outwards;

the bogie is characterized by further comprising four annular damping axle boxes, an easy-to-withdraw axle type gear box and a side beam single-point suspension type motor;

the framework comprises two side beams, a gearbox hanging seat, two gearbox vertical stopping blocks, four semi-ring clamp type axle box hanging seats, two motor single-point hanging seats and two motor vertical limiting stopping blocks, wherein the side beams and the cross beams of the framework are of a cast and integrally formed structure;

the two gearbox hanging seats and the gearbox vertical stopping blocks are sequentially and respectively rotationally and symmetrically fixedly connected to the inner side wall of the cantilever section of the wing-shaped side beam below the root part of the framework transverse stopping seat from top to bottom; the two motor single-point suspension seats and the two motor vertical limiting stop dogs are respectively and rotationally symmetrically fixedly connected to the inner side wall of the lower part of the inclined section of the cantilever section of the wing-shaped side beam, the two motor single-point suspension seats are rotationally symmetrically fixedly connected to the bottom of the lower end face of the inclined section of the cantilever section of the wing-shaped side beam, and the two motor vertical limiting stop dogs are rotationally symmetrically fixedly connected to the upper end of the junction of the inclined section and the horizontal extension section of the cantilever section of the wing-shaped side beam; the four semi-ring clamp type axle box hanging seats are arranged at the bottom of the far end of each bird wing-shaped side beam cantilever section, and a sensor mounting hole is formed in the upper end face of each semi-ring clamp type axle box hanging seat;

the two annular vibration damping axle boxes are arranged on the inner sides of the wheels and are coaxially and rotatably connected to two ends of an axle, each annular vibration damping axle box comprises an axle bearing, an axle box positioning and temperature measuring heat conducting sheath and a vibration damping rubber ring, the axle box positioning and temperature measuring heat conducting sheath is coaxially and fixedly connected with the outer ring of the axle bearing, the inner ring of the axle bearing is coaxially pressed and fixedly connected to two ends of the axle, sockets for positioning temperature sensors are arranged on the upper parts of the axle box positioning and temperature measuring heat conducting sheath and the vibration damping rubber ring, and the positions of the sockets correspond to sensor mounting holes on the upper end faces of cantilever sections;

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 central connecting line of the shell socket of the axle box positioning and temperature measuring heat conducting sheath and the rubber ring blind hole socket of the vibration damping rubber ring forms an angle of 60 degrees with the horizontal plane.

The axle box positioning and temperature measuring heat conducting sheath and the vibration damping rubber ring are respectively of an annular structure formed by buckling two semi-rings, two heat conducting sheath protrusions arranged along the outer side wall of the circumference are arranged on the outer wall of the axle box positioning and temperature measuring heat conducting sheath, two axle box vibration damping ring clamping grooves arranged along the inner wall of the circumference are arranged on the inner side wall of the vibration damping rubber ring, each heat conducting sheath protrusion is embedded into one corresponding axle box vibration damping ring clamping groove, and the axle box positioning and temperature measuring heat conducting sheath is axially limited in the vibration damping rubber ring; the annular vibration reduction axle box is arranged below the end part of the cantilever section of the bird wing-shaped side beam through the matching of the semi-annular shell and the semi-ring clamp type axle box hanging seat.

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 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 utility model has the advantages as follows:

the main structure of the power bogie frame based on the novel motor suspension structure and the temperature-measurable axle box is formed by the frame side beams and the frame cross beams which are integrally formed by casting technology, so that the situation that in the manufacturing process of the frame, a large number of positioning fixtures are needed to be used to ensure that two welding part side beam side wall plates are respectively and vertically welded and fixedly connected with a welding part side beam lower cover plate according to mutually parallel postures is avoided, and structural size deviations of different scales and directions of stretching, distortion, side inclination and the like in the welding cooling process can be corrected through additionally added correction and adjustment operation, so that the welding quality is ensured.

The semi-ring clamp type axle box hanging seat of the utility model is arranged at the bottom of the far end of the cantilever section of each bird wing-shaped side beam, and the upper end surface of each semi-ring clamp type axle box hanging seat is provided with a sensor mounting hole; the two annular damping axle boxes are arranged on the inner sides of the wheels and coaxially fixedly connected to the two ends of the axle, damping rubber rings arranged inside the annular damping axle boxes are coaxially fixedly connected with the outer rings of the axle bearings, the inner rings of the axle bearings are coaxially and pressure-mounted and fixedly connected to the two ends of the axle, rubber ring blind hole sockets for positioning temperature sensors are arranged on the upper portions of the damping rubber rings of the annular damping axle boxes, shell sockets serving as positioning temperature sensor butt-joint seats are arranged on the upper portions of the axle box positioning and temperature measuring heat conducting sheaths, and the positions of the two sockets of the axle box positioning and temperature measuring heat conducting sheaths. The design scheme ensures that the temperature measuring end of the temperature sensor can be inserted and positioned in the blind hole socket of the rubber ring through the sensor mounting hole and the socket of the shell in sequence, thereby getting rid of the blocking effect of the damping rubber ring on the temperature of the axle box, the semi-ring clamp type axle box hanging seat of the utility model becomes a brand new clamp axle-hung wheel pair built-in type axle box which can accurately measure the temperature of the outer side wall of the axle box from the radial direction, the original structural design thoroughly breaks through the problem that the conventional axle box formed by stacking a plurality of layers of rubber tiles on an isosceles trapezoid can only be made into an open structural form, otherwise the temperature can not be accurately measured from the radial direction, and a typical series of suspension devices commonly constructed with a tray axle housing and a series of steel springs must rely on structural contraindications of weldment side beam spring cap cartridges, therefore, the design and manufacturing process of a complicated special positioning tool for the spring cap barrel of the side beam of the butt welding part is avoided. This design is in abandoning to pile up by multilayer rubber tile in isosceles trapezoid's axle box structure outside, still improves and has reduced the appearance and the size of the big interface of isosceles trapezoid of old foundry goods curb girder wingtip tip portion, and then promotes its mechanical structure intensity by a wide margin to make the installation and the temperature measurement of semi-ring clamp formula axle box hanging seat become possible. In addition, the structure form that the semi-ring clamp type axle box lifting seat is arranged inside the inner sides of the two wheels of the axle box is adopted to reduce the damage risk when the axle box is arranged externally, and on the premise of ensuring the installation position and the vibration reduction index of a primary suspension axle box device, the transverse width size and the turning radius of the whole bogie are effectively reduced, so that the curve passing capacity of the bogie is further improved. The compact type primary suspension structure based on the annular vibration reduction axle box benefits from the layout space saved by a new layout mode of a motor and a gear box, and the semi-annular shell of the compact type primary suspension structure is buckled with the semi-ring clamp type axle box suspension seat into a complete annular structure by adopting a split type clamp form connected by bolts, so that the compact type primary suspension structure is convenient to install, disassemble and maintain, and meanwhile, the adverse effect of welding deformation is avoided.

The utility model discloses a gear box lifting seat and gear box vertical backstop all link firmly on the inside wall that is located bird's wing form curb girder cantilever section in order along same plumb line, easily move back shaft type gear box coaxial arrangement on the gear box installation shaft section of axletree, and the casing vertical lifting rod seat that is located the casing farthest end of easily moving back shaft type gear box only hangs in midair through a gear box jib that all is equipped with rubber damping gasket in both ends and connects on the gear box lifting seat, thereby exert the anti-rotation resistance around the axletree to easily moving back shaft type gear box with the biggest turning moment, the gear box casing vertical backstop piece that is located the middle part of easily moving back shaft type gear box far end is in the top of casing vertical lifting rod seat, and its turning radius relative to axletree mounting hole axis is slightly less than the turning radius of casing vertical lifting rod seat, keep about 100 mm's clearance between gear box vertical, 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 damper seat of the utility model are rotationally and symmetrically fixedly connected to the wing-shaped side beam cantilever section, 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 clamp, 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 framework side beam and the axle, and the structure abandons the old motor installation mode of large-size and 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. This design has not only reduced originally by rigidity jumbo size hanger structure to the inboard partial space degree of occuping of framework curb girder, makes the utility model discloses an axle type wheel becomes possible to built-in axle box installation. 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 fastening bolts of the four motor flexible suspension rubber nodes and the side beam end motor suspension rubber nodes 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 r can be dismantled from the upper part of the frame after the vehicle lifting machine is separated from the, the motor overhauling convenience is greatly improved.

The utility model 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 utility model discloses a power bogie based on new-type motor suspended structure and measurable temperature axle box in its technology manufacture index, it is 100 to 140 separately to make clear that the center of two motor flexible suspension rubber node seat holes that are located the below is the contained angle value range of the contained angle beta of the hole center line of motor coupling mounting hole, its optimum is 120, these core data ranges are the best experience parameter who obtains through a large amount of experimental summaries, can optimize the whole shock characteristic of bogie to the at utmost, the crystallization and the proof that research and development put into.

In addition, the power bogie based on the novel motor suspension structure and the temperature-measurable axle box is used as a brand-new bogie design form, the manufacturing schemes of the four annular vibration-damping axle boxes, the easy-to-withdraw axle type gear box and the side beam single-point suspension type motor are all modularized, different module units can independently implement standardized production, and the assembly line manufacturing is favorably realized, 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 schematic perspective view of a prior art welded frame and a series of steel springs;

FIG. 3 is a schematic perspective view of a prior art cast frame, wheel set and internal axle housing;

FIG. 4 is a schematic view of an assembled relationship of a conventional gear case and an axle;

FIG. 5 is a schematic view of the assembled relationship of the bull gear and axle of FIG. 4;

FIG. 6 is an enlarged partial schematic view of FIG. 5;

FIG. 7 is a schematic perspective view of a power bogie based on a novel motor suspension structure and a temperature-measurable axle box;

FIG. 8 is a schematic diagram of the explosion structure of the power bogie based on the novel motor suspension structure and the axle box capable of measuring temperature;

FIG. 9 is a schematic view of the assembled relationship of the frame and the annular vibration-damping axlebox of the present invention;

fig. 10 is a schematic structural view of an assembly relationship between an easy-to-retract shaft type gear box and a side beam single-point suspension type motor according to the present invention;

fig. 11 is a schematic structural view of the easy-to-retract shaft type gear box of the present invention;

fig. 12 is a schematic structural view of an easy-to-retract shaft type gear box, a side beam single-point suspension motor and a gear box boom of the present invention;

FIG. 13 is a schematic structural view of an easy-to-retract shaft gearbox and gearbox boom of the present invention;

fig. 14 is a schematic structural view of a wheel-set unit, an annular vibration damping axle box, and a temperature sensor according to the present invention;

FIG. 15 is a schematic view of the construction of the annular vibration-damped axle housing of the present invention with the axle bearing and semi-annular housing removed;

FIG. 16 is an exploded view of the annular shock absorbing axle housing of the present invention with the axle bearing and semi-annular housing removed;

fig. 17 is a schematic structural view of the axle, the easy-to-withdraw shaft type bull gear bearing inner race radial thickening sleeve and the bull gear bearing end cap of the present invention;

fig. 18 is a schematic axial sectional view of the axle, the easy-to-retract shaft type bull gear bearing inner race radial thickening sleeve and the bull gear bearing end cap of the present invention after being assembled;

fig. 19 is a schematic structural view of the present invention when the probing multi-jaw chuck is used to remove the axle from the gear wheel.

Detailed Description

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

As shown in fig. 7 to 19, the power bogie based on the novel motor suspension structure and the axle box capable of measuring temperature of the present invention comprises a frame a, a wheel pair device composed of a wheel c and an axle d, wherein the frame a comprises two frame side beams a-1 and two frame cross beams a-2, the frame side beam a-1 comprises a side beam middle section a-1-1 serving as two bird wing connection parts and located at a lower position and two bird wing-shaped side beam cantilever sections a-1-2 symmetrically fixed at two ends of the side beam middle section 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 horizontally extended section extending outwards;

the bogie is characterized by further comprising four annular damping axle boxes B, an easy-to-withdraw axle type gear box D and a side beam single-point suspension type motor E;

the framework side beam A-1 and the framework cross beam A-2 are of a cast integral structure, and the framework A further comprises two side beam self-provided gear box lifting seats A-6, two gear box vertical stoppers A-7, four semi-ring clamp type axle box lifting seats A-8, two motor single-point lifting seats A-9 and two motor vertical limit stoppers A-10;

the two gearbox hanging seats A-6 and the gearbox vertical stopping seats A-7 are sequentially and respectively rotationally and symmetrically fixedly connected to the inner side walls of the bird wing-shaped side beam cantilever sections A-1-2 below the root of the framework transverse stopping seat A-5 in sequence from top to bottom; two motor single-point suspension seats A-9 and two motor vertical limit stoppers A-10 are respectively and rotationally symmetrically fixedly connected to the inner side wall of the lower part of the cantilever section A-1-2 of the wing-shaped side beam, the two motor single-point suspension seats A-9 are rotationally symmetrically fixedly connected to the bottom of the lower end face of the cantilever section A-1-2 of the wing-shaped side beam, and the two motor vertical limit stoppers A-10 are rotationally symmetrically fixedly connected to the upper end of the junction of the cantilever section A-1-2 of the wing-shaped side beam and the horizontal extension section; the four 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, and the upper end face of each semi-ring clamp type axle box hanging seat A-8 is provided with a sensor mounting hole A-8-1;

the two annular vibration-damping axle boxes B are arranged on the inner sides of the wheels c and are coaxially and rotatably connected to two ends of an axle d, each annular vibration-damping axle box B comprises an axle bearing B-2, an axle box positioning and temperature-measuring heat-conducting sheath B-3 and a vibration-damping rubber ring B-1, the axle box positioning and temperature-measuring heat-conducting sheath B-3 is coaxially and fixedly connected with the outer ring of the axle bearing B-2, the inner ring of the axle bearing B-2 is coaxially and fixedly connected to two ends of the axle d in a press-fitting manner, sockets for positioning a temperature sensor G are arranged on the upper portions of the axle box positioning and temperature-measuring heat-conducting sheath B-3 and the vibration-damping rubber ring B-1, and the positions of the sockets correspond to sensor mounting holes A-;

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 lifting seat A-6 through a gear box lifting 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 central connecting line of the shell socket B-3-1 of the axle box positioning and temperature measuring heat conducting sheath B-3 and the rubber ring blind hole socket B-1-1 of the vibration damping rubber ring B-1 forms an angle of 60 degrees with the horizontal plane.

The axle box positioning and temperature measuring heat conducting sheath B-3 and the vibration damping rubber ring B-1 are respectively of an annular structure formed by buckling two semi-rings, the outer wall of the axle box positioning and temperature measuring heat conducting sheath B-3 is provided with two heat conducting sheath protrusions B-3-2 which are arranged along the circumferential outer side wall, the inner side wall of the vibration damping rubber ring B-1 is provided with two axle box vibration damping ring clamping grooves B-1-2 which are arranged along the circumferential inner wall, each heat conducting sheath protrusion B-3-2 is embedded into one corresponding axle box vibration damping ring clamping groove B-1-2, and the axle box positioning and temperature measuring heat conducting sheath B-3 is axially limited in the vibration damping rubber ring B-1; the annular vibration reduction axle box B is arranged below the end part of the cantilever section A-1-2 of the wing-shaped side beam of the bird by matching a semi-annular shell B-4 with a semi-ring clamp type axle box hanging seat A-8.

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-withdraw shaft type gearbox D, four motor flexible suspension rubber node seat holes D-2 distributed according to an isosceles trapezoid 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, the center of each of two lower motor flexible suspension rubber node seat holes D-2 and the hole center connecting line of the motor coupler mounting hole D-1-2 form an included angle beta of 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 an extension line of a 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 gearbox shell vertical stop block D-4 is fixedly connected with a shell vertical hanging rod seat D-3, and two ends of a gearbox hanging rod H are respectively provided with a rubber vibration damping gasket which is used for elastically connecting the shell vertical hanging rod seat D-3 with a gearbox hanging seat A-6.

The lower part of the rear end cover of the side beam single-point suspension type motor E shell is fixedly connected to a 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 hoop E-2, the upper part of the rear end cover of the side beam single-point suspension type motor E shell is fixedly connected with a horizontal motor vertical cantilever stop rod E-4, the motor vertical cantilever stop rod E-4 is suspended right above a motor vertical limiting stop A-10, and the range of the gap value of the motor vertical cantilever stop rod E-4 and the motor vertical limiting stop rod A-10 is 10-50 mm; a motor shell of the side beam single-point suspension type motor E, which is positioned at the end of the motor output shaft, 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 respectively, and the motor output shaft of the side beam single-point suspension type motor E is rotatably connected to a reduction gear mechanism inside the motor coupler mounting hole D-1-2 through a coupler E-3.

The outer diameter of a gear box mounting shaft section d-1 of the axle d is reduced to 80 percent of the original value to form 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 mounting shaft section D-3 of the small-diameter gear box, and the two 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 fixedly connected on the outer diameter of the easy-to-withdraw shaft type bull gear bearing inner ring radial thickening sleeve D-7 through press fitting; the end face of the radial outer circumference of the radial thickening sleeve D-7 of the inner ring of the easy-to-withdraw shaft type large gear bearing is provided with a screw hole array arranged along the radial direction of the easy-to-withdraw shaft type large gear bearing, two large gear bearing end covers D-6 are respectively and fixedly connected to the front end face and the rear end face of the radial thickening sleeve D-7 of the inner ring of the easy-to-withdraw shaft type large gear bearing through bolt groups arranged along the circumference, 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.

When the power bogie based on the novel motor suspension structure and the temperature-measurable axle box is applied, the included angle beta between the center of the two motor flexible suspension rubber node seat holes D-2 below and the hole center connecting line of the motor coupler mounting holes D-1-2 is set to be 120 degrees.

Claims (6)

1. The power bogie comprises a framework (A) and a wheel pair device consisting of wheels (c) and an axle (d), wherein the framework (A) comprises two framework side beams (A-1) and two framework cross beams (A-2), the framework side beams (A-1) comprise 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 fixedly connected to the two ends of the side beam middle sections (A-1-1), and the bird wing-shaped side beam cantilever sections (A-1-2) are formed by connecting an upward tilted section and a horizontal extending section which extends horizontally and outwards;

the bogie is characterized by also comprising four annular damping axle boxes (B), an easy-to-withdraw axle type gear box (D) and a side beam single-point suspension type motor (E);

the framework side beam (A-1) and the framework cross beam (A-2) are of a cast integrated structure, and the framework (A) further comprises two side beam self-provided gear box hanging seats (A-6), two gear box vertical stopping blocks (A-7), four semi-ring clamp type axle box hanging seats (A-8), two motor single-point hanging seats (A-9) and two motor vertical limiting stopping blocks (A-10);

the two gearbox hanging seats (A-6) and the vertical gear box stopping blocks (A-7) are sequentially and respectively rotationally and symmetrically fixedly connected to the inner side walls of the bird wing-shaped side beam cantilever sections (A-1-2) below the root parts of the framework transverse stopping seats (A-5) from top to bottom; two motor single-point suspension seats (A-9) and two motor vertical limit stoppers (A-10) are respectively and rotationally symmetrically 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 two motor single-point suspension seats (A-9) are rotationally symmetrically 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 two motor vertical limit stoppers (A-10) are rotationally symmetrically 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 four 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), and a sensor mounting hole (A-8-1) is formed in the upper end face of each semi-ring clamp type axle box hanging seat (A-8);

two annular damping axle boxes (B) are arranged on the inner sides of the wheels (c) and are coaxially and rotatably connected with the two ends of the axle (d), each annular damping axle box (B) comprises an axle bearing (B-2), the axle box positioning and temperature measuring heat conducting sheath (B-3) and the vibration damping rubber ring (B-1), the axle box positioning and temperature measuring heat conducting sheath (B-3) is coaxially and fixedly connected with the outer ring of the axle bearing (B-2), the inner ring of the axle bearing (B-2) is coaxially and fixedly pressed and connected with the two ends of an axle (d), the upper parts of the axle box positioning and temperature measuring heat conducting sheath (B-3) and the vibration damping rubber ring (B-1) are respectively provided with a socket for positioning a temperature sensor (G), and the position of the socket corresponds to a sensor mounting hole (A-8-1) on the upper end face of the cantilever section (A-1-2) of the bird wing-shaped side beam;

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 the 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.

2. The power bogie based on the novel motor suspension structure and the temperature measurable axle box according to claim 1, characterized in that the central connecting line of the shell socket (B-3-1) of the axle box positioning and temperature measuring heat conducting sheath (B-3) and the rubber ring blind hole socket (B-1-1) of the damping rubber ring (B-1) forms an angle of 60 degrees with the horizontal plane.

3. The power bogie based on the new motor suspension structure and the measurable temperature axle box as claimed in claim 1, the temperature-measuring and locating device is characterized in that the axle box locating and temperature-measuring heat-conducting sheath (B-3) and the vibration-damping rubber ring (B-1) are respectively of an annular structure formed by buckling two semi-rings, the outer wall of the axle box locating and temperature-measuring heat-conducting sheath (B-3) is provided with two heat-conducting sheath protrusions (B-3-2) arranged along the circumferential outer side wall, the inner side wall of the vibration-damping rubber ring (B-1) is provided with two axle box vibration-damping ring clamping grooves (B-1-2) arranged along the circumferential inner wall, each heat-conducting sheath protrusion (B-3-2) is embedded into one corresponding axle box vibration-damping ring clamping groove (B-1-2), and the axle box locating and temperature-measuring heat-conducting sheath (B-3) is axially limited in the; the annular damping axle box (B) is arranged below the end part of the cantilever section (A-1-2) of the bird wing-shaped side beam through the matching of a semi-annular shell (B-4) and a semi-ring clamp type axle box hanging seat (A-8).

4. The power bogie based on the novel motor suspension structure and the temperature measurable axle box 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-withdraw axle gearbox (D), four motor flexible suspension rubber node seat holes (D-2) distributed in an isosceles trapezoid are fixedly connected to the same side of the gearbox shell (D-1) at 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).

5. The power bogie based on the novel motor suspension structure and the temperature measurable axle box as claimed in claim 4, wherein the lower part of the rear end cover of the shell of the side beam single-point suspension 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 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).

6. The power bogie based on the new motor suspension structure and the measurable temperature axle box according to 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.

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