Power bogie based on easy-retracting gearbox and side beam single-point suspension motor

Abstract

The power bogie based on the easy-to-retract axle gearbox and the side beam single-point suspension motor belongs to the field of rail vehicle power bogie devices, which includes a frame, a wheel set device consisting of wheels and axles, an easy-to-retract axle gearbox and a side beam single-point suspension motor. The present invention effectively reduces the overall lateral width and turning radius of the bogie on the premise of ensuring the installation position and vibration reduction index of the primary suspension axle box device, so that the curve passing ability of the bogie is further improved, and the annular vibration reduction axle box is easy to install and disassemble for maintenance; after removing the four fastening bolts respectively, the side beam single-point suspension motor can be removed separately from the bottom of the car body through the maintenance trench.

Description

Technical Field

[0001] The invention belongs to the field of rail vehicle power bogie devices, and in particular relates to a power bogie based on an easy-to-retract axle gearbox and a side beam single-point suspension motor. Background Art

[0002] When designing rail train bogies, it is necessary not only to comprehensively consider the structural strength of the frame as the load-bearing body, the effects of various auxiliary vibration-reducing components such as anti-snaking dampers, and the installation method of the brake mechanism, but also to comprehensively design the suspension method of the power bogie motor, the layout space of the motor and its gearbox, and many other factors according to the theoretical speed, load, minimum curve curvature, wind, snow, and flying rocks of the train, according to the needs of different models. Various design schemes developed around the above core ideas are increasingly improved and complicated, which ultimately led to the iterative update and continuous improvement of the manufacturing level of power bogies. The structural schemes of different models are constantly updated, and some new forms of new schemes even completely overturn the old ideas, making their core improvements have obvious differences and innovations.

[0003] like Figure 1 As shown, for a welded side beam formed by welding a plurality of plates to form a box-shaped structure, its welded side beam i is usually a bird-wing-shaped structure with two wings upturned, and a welded wheel axle seat i-2 is welded and fixedly connected to the lower end surface of the inclined surface i-1 at the wing root of each bird-wing-shaped structure. Each welded side beam spring cap cylinder i-3 is welded and fixedly connected to the wing tip of a welded side beam i. Since the curves or curved surfaces of the side beam upper cover plate, the side beam lower cover plate and the two side beam side wall plates i-4 sandwiched between the two of the weldment side beam i are all special bird-wing-shaped structures that match the side beam side wall plates i-4, the clamping and positioning operation of the weldment side beam i during the overall assembly welding is relatively complicated. During its manufacturing process, a large number of positioning fixtures are required to ensure that the two side beam side wall plates i-4 are vertically welded and fixedly connected to the side beam lower cover plate in a parallel posture. The positioning of the multiple side wall plate connecting ribs and the weldment side beam spring cap cylinder i-3 requires additionally designed complex positioning tooling to achieve. For example, the Chinese patent with publication number CN110722319A discloses a railway passenger car frame side beam welding positioning tooling, and the complex positioning tooling structure disclosed therein is additionally designed to improve the accuracy of the assembly and positioning of the side beam spring cap cylinder i-3 and other components, reduce calibration and mapping work, and reduce labor intensity. Similarly, the process of positioning the lower end of the inclined surface at the root of the weldment side beam wing and welding the weldment wheel axle seat i-2 also requires specially designed assembly and positioning tooling for side beam front welding, such as Chinese Patent Publication No. CN108817797A, to be successfully implemented. The design and manufacture of such positioning tooling will inevitably lead to a substantial increase in production costs.

[0004] On the other hand, a motor mount t and a gearbox mount u are usually provided on the existing power bogie frame g, and are used to respectively correspond to the fixed traction motor r and the gearbox s. A dual-motor installation method is adopted in which the front and rear traction motors r are arranged rotationally symmetrically with respect to the geometric center of the power bogie frame g to offset the reverse torque of the two motors, thereby optimizing the overall mechanical stability and vibration balance characteristics of the power bogie. However, this installation method, which relies on the power bogie frame g and is completely rigidly connected to the motor hanger t and the gearbox hanger u, has a layout position and welding manufacturing process, which not only puts forward higher requirements on the structural strength and symmetry accuracy of the crossbeam body, but also increases the overall structural size and turning radius of the bogie, which is not conducive to improving its minimum curve passing ability. In addition, since the lugs of the traction motor r housing are non-removable rigid structures, they interfere with the frame and gearbox structures, causing the traction motor r to be unable to be removed directly from the bottom of the car body through the maintenance trench. Instead, it is necessary to use a car crane to separate the car body above the frame from the frame before the traction motor r can be removed from the top of the frame, which greatly increases the difficulty of motor maintenance and replacement. At the same time, the rigidly connected motor hanger t and gearbox hanger u also lead to the lack of sufficient vibration reduction protection system for the traction motor r and the gearbox s, which makes the installation of auxiliary structures such as anti-snake shock absorbers and anti-roll torsion bars n an indispensable and necessary supplement.

[0005] like Figures 2 to 4As shown, the existing large gear s-2 installed inside the snap-fitting spliced ​​gearbox housing s-1 is directly pressed into the bearing outer ring s-3-2 on the large gear bearing s-3 to form a coaxial interference fit, and the gearbox mounting shaft section d-1 on the axle d is directly pressed into the large gear bearing inner ring s-3-1 on the large gear bearing s-3 to form a coaxial interference fit. The coaxial connection form of the interference fit causes the gearbox mounting shaft section d-1, the gearbox bearing s-3 and the large gear s-2 to become an inseparable whole. In addition, due to the low structural strength of the snap-fitting spliced ​​gearbox housing s-1, it cannot be directly used as the fulcrum of the unloading baffle on the wheel axle unloading press. In addition, the bearing of the existing large gear bearing s-3 The inner ring is too narrow, resulting in that even if the unloading baffle on the axle unloading press is converted into a multi-jaw chuck and inserted into the gearbox through the axle through hole on the axial side wall of the gearbox, it is still impossible to reliably apply radial unloading blocking force to the large gear bearing inner ring s-3-1 due to the lack of sufficient radial force points, making it impossible to directly implement axle unloading. As a result, when the axle d or the large gear s-2 is subsequently inspected and repaired, the gearbox housing s-1 that is spliced ​​and spliced ​​must first be released from the original splicing state, and the axle d, the large gear s-2 coaxially fixed to it, and the large gear bearing s-3 must be removed from the frame as a whole, and then transferred to the axle unloading press to complete the unloading and replacement operation. This method is cumbersome, time-consuming and labor-intensive. It is impossible to quickly and easily remove and replace the axle d without removing the large gear s-2 from the snap-fit ​​gearbox housing s-1. It is also impossible to remove the axle d alone and directly perform maintenance and lubrication maintenance on the large gear s-2 in the gearbox housing s-1 through the hole left after the axle d is removed while keeping the snap-fit ​​gearbox housing s-1 in a snap-fit ​​state. Summary of the invention

[0006] The technical problems to be solved by the present invention are as follows:

[0007] 1) During the manufacturing process of the existing welded side beam with a bird-wing-shaped curved structure, a large number of positioning fixtures must be used to ensure that the two side wall plates of the welded side beam are vertically welded and fixedly connected to the lower cover plate of the welded side beam in a parallel posture.

[0008] 2) The positioning process of the multiple side wall plates connecting the ribs of the welded side beams and the spring cap tube of the welded side beams requires additionally designed complex positioning tooling to achieve; and it must be corrected through additional correction and adjustment operations to correct the various asymmetric structural dimensional deviations of different scales and directions of stretching, distortion, tilting, etc. that occur during the welding cooling process, barely ensuring the welding quality.

[0009] 3) The motor installation method relies on the frame and is completely rigidly connected to the motor mount and gearbox mount. The layout position and welding manufacturing process of the motor mount and gearbox mount not only put forward higher requirements on the structural strength and symmetry accuracy of the crossbeam, but also occupies most of the space on the inner side of the conventional frame. At the same time, it also increases the overall structural size and turning radius of the bogie, which is not conducive to improving its minimum curve passing ability.

[0010] 4) Since the lifting lugs of the traction motor casing are non-removable rigid structures, they interfere with the frame and gearbox structures, making it impossible to remove the traction motor directly from under the car body through the maintenance trench. Instead, a car crane must be used to separate the car above the frame from the frame before the traction motor can be removed from above the frame, which greatly increases the difficulty of motor maintenance and replacement.

[0011] 5) Due to the fact that the large gear installed inside the snap-fit ​​gearbox housing is pressed into the gearbox mounting shaft section of the axle through the large gear bearing to form an interference fit to form a coaxial fixed connection, the gearbox mounting shaft section, the gearbox bearing and the large gear become an inseparable whole, and due to the low structural strength of the snap-fit ​​gearbox housing, it cannot be directly used as the fulcrum of the unloading baffle on the wheel axle unloading press, and the existing large gear bearing inner ring is too narrow, resulting in that even if the unloading baffle on the wheel axle unloading press is modified into a multi-claw chuck and inserted into the axle through hole on the axial side wall of the gearbox Even when entering the gearbox, there is still a lack of sufficient radial fulcrums, which makes it impossible to reliably apply radial withdrawal blocking force to the inner ring of the large gear bearing, making it impossible to directly withdraw the axle. These factors result in many technical problems such as the inability to quickly and easily remove and replace the axle without removing the large gear from the snap-fit ​​gearbox housing during subsequent maintenance of the axle or large gear, and the inability to pull out the axle alone and directly perform maintenance and lubrication maintenance on the large gear in the gearbox housing through the hole left after the axle is withdrawn while keeping the snap-fit ​​gearbox housing in the snap-fit ​​state.

[0012] The technical solution adopted by the present invention to solve the above technical problems is as follows:

[0013] A power bogie based on an easy-to-retract axle gearbox and a side beam single-point suspension motor, comprising a frame, a wheelset device consisting of wheels and axles, the frame comprising two frame side beams and two frame cross beams, the frame side beams comprising a side beam middle section at a lower position as two bird-wing connecting parts and two bird-wing-shaped side beam cantilever sections symmetrically fixed to both ends of the side beam middle section, the bird-wing-shaped side beam cantilever section being connected by an upwardly tilted section and a horizontally extended section extending horizontally outward;

[0014] The bogie is characterized in that it also includes an easy-to-retract axle gearbox and a side beam single-point suspension motor;

[0015] The frame side beams and frame cross beams are cast one-piece structures. The frame also includes two side beams with built-in gearbox hangers, two gearbox vertical stops, two motor single-point suspension seats and two motor vertical limit stops;

[0016] The two gearbox suspension seats and the gearbox vertical stoppers are rotationally symmetrically fixedly connected to the inner side wall of the cantilever section of the bird-wing-shaped side beam in a sequence from top to bottom; the two motor single-point suspension seats and the two motor vertical limit stops are rotationally symmetrically 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 two motor single-point suspension seats are rotationally symmetrically 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 two motor vertical limit stops 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 bird-wing-shaped side beam;

[0017] The easy-to-retract gearbox is press-fitted onto the gearbox mounting shaft section of the axle, and one side of the easy-to-retract gearbox is connected to the gearbox hanging seat via a gearbox hanging rod;

[0018] 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 to the easy-to-retract shaft type gear box in a rubber node suspension manner.

[0019] An axle mounting hole and a motor coupling mounting hole are provided in the middle of the gearbox housing of the easy-to-retract axle gearbox, and four motor flexible suspension rubber node seat holes distributed in an isosceles trapezoid are fixedly connected on the same side of the gearbox housing around the motor coupling mounting hole, and the included angle β between the centers of the two motor flexible suspension rubber node seat holes located at the bottom and the hole center connecting line of the motor coupling mounting hole is 100°~140°, and the optimal value is 120 degrees; a vertical stop block of the gearbox housing is fixedly connected to the outer wall of the gearbox housing 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 gearbox housing; a housing vertical suspension rod seat is also fixedly connected to the outer wall of the gearbox housing below the gearbox housing vertical stop block, and rubber vibration-damping gaskets are provided at both ends of the gearbox suspension rod, which are used to elastically connect the housing vertical suspension rod seat with the gearbox suspension seat.

[0020] The lower part of the rear end cover of the side beam single-point suspension motor housing 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 half-ring clamp, and the upper part of the rear end cover of the side beam single-point suspension motor housing is fixedly connected with a horizontal motor vertical cantilever stop rod, and the motor vertical cantilever stop rod is suspended directly above the motor vertical limit stop, and the gap value range between the two is 10 to 50 mm; the motor housing located at the end where the motor output shaft is located on the side beam single-point suspension motor is fixedly connected to the four motor flexible suspension rubber node seat holes in an elastic suspension manner through four motor flexible suspension rubber nodes, and the motor output shaft of the side beam single-point suspension motor is rotatably connected to the reduction gear mechanism inside the motor coupling mounting hole through a coupling.

[0021] The outer diameter of the gearbox mounting shaft section of the axle is reduced to 80% of the original value, forming a small-diameter gearbox mounting shaft section; the easy-to-retract gearbox also includes a radially thickened sleeve of the inner ring of the easy-to-retract large gear bearing and two large gear bearing end covers with a screw hole array;

[0022] The inner diameter of the radially thickened sleeve of the inner ring of the easy-to-withdraw type large gear bearing is the same as the outer diameter of the small-diameter gearbox mounting shaft section, and the two are coaxially fixed by press-fitting; the inner ring of the large gear bearing on the large gear bearing is coaxially fixed to the outer diameter of the radially thickened sleeve of the inner ring of the easy-to-withdraw type large gear bearing by press-fitting; an array of screw holes opened along its radial direction is provided on the radial outer circumferential end face of the radially thickened sleeve of the inner ring of the easy-to-withdraw type large gear bearing, and the two large gear bearing end covers are respectively fixed to the front and rear end faces of the radially thickened sleeve of the inner ring of the easy-to-withdraw type large gear bearing by bolt groups along the circumferential array, and the front and rear end faces of the large gear bearing are sealed in the axle mounting hole; the flanges of the gearbox brush mechanism are coaxially fixed to the corresponding screw holes on the outer diameter side wall of the axle mounting hole by multiple bolts.

[0023] The beneficial effects of the present invention are as follows:

[0024] The main structure of the power bogie frame based on the easy-to-retract axle gearbox and the side beam single-point suspension motor is composed of frame side beams and frame cross beams that are integrally formed by a casting process. This avoids the need to use a large number of positioning fixtures during the manufacturing process of the frame to ensure that the two welded side beam side wall plates are vertically welded and fixedly connected to the welded side beam lower cover plates in a parallel posture, and avoids the need to perform additional corrective and adjustment operations to correct various asymmetric structural dimensional deviations such as stretching, distortion, and roll in different scales and directions that occur during the welding cooling process to ensure welding quality.

[0025] The gearbox hanger and the gearbox vertical stop of the present invention are fixedly connected in sequence along the same plumb line on the inner side wall of the cantilever section of the bird-wing-shaped side beam. The easy-to-retract axle gearbox is coaxially installed on the gearbox mounting shaft section of the axle, and the shell vertical hanger seat located at the farthest end of the shell of the easy-to-retract axle gearbox is suspended and connected to the gearbox hanger only by a gearbox hanger with rubber vibration-damping gaskets at both ends, thereby applying anti-rotation resistance around the axle to the easy-to-retract axle gearbox with the maximum rotational torque. The gearbox shell vertical stop block located in the middle of the far end of the easy-to-retract axle gearbox is above the shell vertical hanger seat, and its rotation radius relative to the axis of the axle mounting hole is slightly smaller than the rotation radius of the shell vertical hanger seat. A movable gap of about 100 mm is maintained between the gearbox vertical stop and the gearbox shell vertical stop block, and the maximum rotational displacement of the gearbox shell vertical stop block is limited. On the other hand, similar to the suspension method of the easy-to-retract gearbox, the motor single-point suspension seat and the motor vertical limit stop of the present invention are rotationally symmetrically fixed to the bird-wing-shaped side beam cantilever section, and the lower part of the rear end cover of the side beam single-point suspension motor housing is fixed to the motor single-point suspension seat through a side beam end motor suspension rubber node and a motor suspension rubber node half-ring clamp, and the motor vertical cantilever stop rod is suspended directly above the motor vertical limit stop; at the same time, the motor housing at the end where the motor output shaft is located on the side beam single-point suspension motor is fixed to the four motor flexible suspension rubber node seat holes in an elastic suspension manner through four motor flexible suspension rubber nodes. The suspension method of the aforementioned easy-to-retract gearbox and the side beam single-point suspension motor enables the weight and vibration load of both to be completely borne by the frame side beams and the axles. This structure abandons the old motor installation method that relies on the frame and is completely connected to the motor mount and gearbox mount in a large-size, rigid form, thereby reducing the structural strength of the crossbeam and the process requirements for symmetry accuracy and assembly accuracy, and simplifying the complexity of frame manufacturing. This design not only reduces the space occupied by the rigid large-size suspension structure on the inner side of the frame side beam, but also reserves sufficient operating space for the disassembly and maintenance of the gearbox and motor structure, greatly optimizing the assembly and disassembly scheme of the motor. The easy-to-retract gearbox is fixedly connected with four motor flexible suspension rubber node seat holes distributed in an isosceles trapezoid on the same side of the gearbox housing around the motor coupling mounting hole, and the centers of the two motor flexible suspension rubber node seat holes located below are respectively at an angle β of 100° to 140° with the hole center connection line of the motor coupling mounting hole, and the frame traction rod seat is fixedly connected to the outer wall of the middle part of the middle section of the side beam. This design enables the side beam single-point suspension motor to be removed separately from the bottom of the car body through the maintenance trench after the fastening bolts of the four motor flexible suspension rubber nodes and the motor suspension rubber nodes at the side beam end are removed respectively, completely getting rid of the old mode of using a car crane to separate the car body from the frame above the frame before the traction motor can be removed from the top of the frame, greatly improving the convenience of motor maintenance.

[0026] The present invention reduces the outer diameter of the gearbox installation shaft section on the original axle to 80% of the original value, forming a small-diameter gearbox installation shaft section; a newly-added radially thickened sleeve of the inner ring of the large gear bearing of the easy-to-withdraw type is coaxially nested on the outer diameter of the small-diameter gearbox installation shaft section in the form of interference fit, and the inner ring of the large gear bearing on the large gear bearing is coaxially fixed to the outer diameter of the radially thickened sleeve of the inner ring of the large gear bearing of the easy-to-withdraw type by press fitting; in this way, the inner ring of the large gear bearing, which was originally too narrow in the radial direction, is thickened in a reverse direction, so that when the wheel axle is unloaded on the press, the baffle plate can be unloaded After being modified into a multi-jaw chuck, the multi-jaw chuck claws can be inserted into the gearbox from the axle mounting holes on the axial side wall of the gearbox, and the anti-movement stop force can be evenly and reliably applied to the axial outer end face of the radially thickened sleeve of the inner ring of the easy-to-retract large gear bearing which is coaxially fixed to the inner ring of the large gear bearing. This makes it possible to remove the axle separately and directly perform maintenance and lubrication on the large gear in the gearbox housing through the hole left after the axle is removed without removing the large gear from the snap-fit ​​gearbox housing.

[0027] The process manufacturing indicators of the power bogie based on the easy-to-retract gearbox and the side beam single-point suspension motor of the present invention clearly stipulate that the angle β between the centers of the two motor flexible suspension rubber node seat holes located below and the lines connecting the centers of the motor coupling mounting holes is in the range of 100° to 140°, and the optimal value is 120°. These core data ranges are the best empirical parameters obtained through a large number of experimental summaries, which can optimize the overall vibration characteristics of the bogie to the greatest extent and are the crystallization and proof of research and development investment.

[0028] In addition, as a new bogie design, the power bogie based on the easy-to-withdraw axle gearbox and the side beam single-point suspension motor has modularized the manufacturing solutions of the easy-to-withdraw axle gearbox and the side beam single-point suspension motor. Different module units can be independently produced in a standardized manner, which is conducive to realizing assembly line manufacturing, thereby greatly improving production efficiency, reducing production costs and creating economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional structural schematic diagram of an existing welded frame bogie;

[0030] Figure 2 It is a schematic diagram of the assembly relationship between the existing gear box and the axle;

[0031] Figure 3 yes Figure 2 Schematic diagram of the assembly relationship between the large gear and the axle;

[0032] Figure 4 yes Figure 3 A partial enlarged schematic diagram of

[0033] Figure 5 It is a three-dimensional structural schematic diagram of a power bogie based on an easy-to-retract axle gearbox and a side beam single-point suspension motor of the present invention;

[0034] Figure 6 It is an exploded structural schematic diagram of a power bogie based on an easy-to-retract axle gearbox and a side beam single-point suspension motor of the present invention;

[0035] Figure 7 It is a structural schematic diagram of the framework in the present invention;

[0036] Figure 8 It is a structural schematic diagram of the easy-to-retract gearbox, the side beam single-point suspension motor and the gearbox suspension rod in the present invention;

[0037] Fig. 9 It is a structural schematic diagram of the easy-to-retract shaft gearbox of the present invention;

[0038] Fig.10 It is a partial exploded structural schematic diagram of the easy-to-retract gearbox, the side beam single-point suspension motor and the gearbox suspension rod in the present invention;

[0039] Fig.11 It is a structural schematic diagram of the easy-to-retract shaft gearbox and the gearbox suspension rod in the present invention;

[0040] Fig.12 It is a structural schematic diagram of the axle, the radially thickened sleeve of the inner ring of the easy-to-retract large gear bearing and the large gear bearing end cover in the present invention;

[0041] Fig.13 It is a schematic diagram of the axial cross-sectional structure of the axle, the radially thickened sleeve of the inner ring of the easy-to-retract large gear bearing and the large gear bearing end cover after being assembled in the present invention;

[0042] Fig.14 It is a structural schematic diagram of the present invention when the axle is unloaded from the large gear by using the probe-type multi-jaw chuck. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below with reference to the accompanying drawings.

[0044] like Figures 5 to 14As shown, the power bogie based on the easy-to-retract axle gearbox and the side beam single-point suspension motor of the present invention comprises a frame A, a wheelset device consisting of a wheel c and an axle d, 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 which is located at a lower position and serves as two bird-wing connecting parts, and two bird-wing-shaped side beam cantilever sections A-1-2 which are symmetrically fixed to both ends of the side beam middle section A-1-1, and the bird-wing-shaped side beam cantilever section A-1-2 is connected by an upwardly tilted section and a horizontally extended section extending horizontally outward;

[0045] Characterized in that the bogie also includes an easy-to-retract axle gearbox D and a side beam single-point suspension motor E;

[0046] The frame side beam A-1 and the frame cross beam A-2 are cast integral structures. The frame A also includes two side beams with built-in gearbox hangers A-6, two gearbox vertical stops A-7, two motor single-point suspension seats A-9 and two motor vertical limit stops A-10;

[0047] The two gearbox suspension seats A-6 and the gearbox vertical stopper A-7 are rotationally symmetrically fixedly connected to the inner side wall of the bird-wing-shaped side beam cantilever section A-1-2 in sequence from top to bottom; the two motor single-point suspension seats A-9 and the two motor vertical limit stops A-10 are rotationally symmetrically fixedly connected to the inner side wall of the lower part of the inclined section of the bird-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 surface of the inclined section of the bird-wing-shaped side beam cantilever section A-1-2, and the two motor vertical limit stops A-10 are rotationally symmetrically fixedly connected to the upper end of the junction of the inclined section and the horizontal extension section of the bird-wing-shaped side beam cantilever section A-1-2;

[0048] The easy-to-retract gearbox D is pressed onto the gearbox mounting shaft section d-1 of the axle d, and one side of the easy-to-retract gearbox D is connected to the gearbox suspension seat A-6 via the gearbox suspension rod H;

[0049] One side of the 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 to the easy-to-retract shaft type gear box D in a rubber node suspension manner.

[0050] The gearbox housing D-1 of the easy-to-retract gearbox D is provided with an axle mounting hole D-1-1 and a motor coupling mounting hole D-1-2 in the middle. Four motor flexible suspension rubber node seat holes D-2 distributed in an isosceles trapezoid are fixedly connected on the same side of the gearbox housing D-1 around the motor coupling mounting hole D-1-2. The center of the two motor flexible suspension rubber node seat holes D-2 located at the bottom is respectively connected to the hole center of the motor coupling mounting hole D-1-2. The angle β is 100° to 140°, and the optimal value is 12 0 degrees; a gearbox housing vertical stop block D-4 is fixedly connected to the outer wall of the gearbox housing D-1 where the extension line of the center line of the axle mounting hole D-1-1 and the motor coupling mounting hole D-1-2 intersects with the gearbox housing D-1; a housing vertical hanger seat D-3 is also fixedly connected to the outer wall of the gearbox housing D-1 below the gearbox housing vertical stop block D-4, and rubber vibration-damping gaskets are provided at both ends of the gearbox hanger H, which are used to elastically connect the housing vertical hanger seat D-3 with the gearbox hanger seat A-6.

[0051] The lower part of the rear end cover of the side beam single-point suspension motor E housing 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 half-ring clamp E-2, and the upper part of the rear end cover of the side beam single-point suspension motor E housing is fixedly connected with a horizontal motor vertical cantilever stop rod E-4, and the motor vertical cantilever stop rod E-4 is suspended directly above the motor vertical limit stop A-10, and the gap value between the two ranges from 10 to 50 mm; the motor housing at the end where the motor output shaft is located on the side beam single-point suspension motor E is fixedly connected to the four motor flexible suspension rubber node seat holes D-2 in an elastic suspension manner through four motor flexible suspension rubber nodes D-5, and the motor output shaft of the side beam single-point suspension motor E is rotatably connected to the reduction gear mechanism inside the motor coupling mounting hole D-1-2 through the coupling E-3.

[0052] The outer diameter of the gearbox mounting shaft section d-1 of the axle d is reduced to 80% of the original value, forming a small-diameter gearbox mounting shaft section d-3; the easy-to-retract gearbox D also includes a radially thickened sleeve D-7 of the inner ring of the easy-to-retract large gear bearing and two large gear bearing end covers D-6 with a screw hole array;

[0053] The inner diameter of the radially thickened sleeve D-7 of the inner ring of the large gear bearing that is easy to withdraw is the same as the outer diameter of the small diameter gearbox mounting shaft section d-3, and the two are coaxially fixed by press fitting; the large gear bearing inner ring s-3-1 on the large gear bearing s-3 is coaxially fixed to the outer diameter of the radially thickened sleeve D-7 of the inner ring of the large gear bearing that is easy to withdraw by press fitting; the radial outer circumferential end face of the radially thickened sleeve D-7 of the inner ring of the large gear bearing that is easy to withdraw is provided with an array of screw holes opened along its radial direction, and the two large gear bearing end covers D-6 are respectively fixed to the front and rear end faces of the radially thickened sleeve D-7 of the inner ring of the large gear bearing that is easy to withdraw by bolt groups along the circumferential array, and the front and rear end faces of the large gear bearing s-3 are sealed in the axle mounting hole D-1-1; the flanges of the gearbox brush mechanism D-8 are coaxially fixed to the corresponding screw holes on the outer diameter side wall of the axle mounting hole D-1-1 by multiple bolts.

[0054] When the present invention is specifically applied to a power bogie based on an easy-to-retract gearbox and a side beam single-point suspension motor, the angle β between the center of each of the two motor flexible suspension rubber node seat holes D-2 located below and the center of the motor coupling mounting hole D-1-2 is set to 120°.

Claims

1. A power bogie based on an easy-to-retract axle gearbox and a side beam single-point suspension motor, comprising a frame (A), a wheelset device consisting of a wheel (c) and an axle (d), the frame (A) comprising two frame side beams (A-1) and two frame cross beams (A-2), the frame side beam (A-1) comprising a side beam middle section (A-1-1) at a lower position as two bird-wing connecting parts and two bird-wing-shaped side beam cantilever sections (A-1-2) symmetrically fixed to both ends of the side beam middle section (A-1-1), the bird-wing-shaped side beam cantilever section (A-1-2) being connected by an upwardly tilted section and a horizontally extended section extending horizontally outward; It is characterized in that The bogie also includes an easy-to-retract axle gearbox (D) and a side beam single-point suspension motor (E); The frame side beam (A-1) and the frame cross beam (A-2) are cast integral structures, and the frame (A) also includes two side beams with gearbox hangers (A-6), two gearbox vertical stops (A-7), two motor single-point suspension seats (A-9) and two motor vertical limit stops (A-10); The two gearbox suspension seats (A-6) and the gearbox vertical stoppers (A-7) are rotationally symmetrically fixedly connected to the inner side wall of the bird-wing-shaped side beam cantilever section (A-1-2) in sequence from top to bottom; the two motor single-point suspension seats (A-9) and the two motor vertical limit stops (A-10) are rotationally symmetrically fixedly connected to the inner side wall of the lower part of the inclined section of the bird-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 surface of the inclined section of the bird-wing-shaped side beam cantilever section (A-1-2); the two motor vertical limit stops (A-10) are rotationally symmetrically fixedly connected to the upper end of the junction of the inclined section and the horizontal extension section of the bird-wing-shaped side beam cantilever section (A-1-2); The easy-to-retract axle gearbox (D) is press-fitted onto the gearbox mounting shaft section (d-1) of the axle (d), and one side of the easy-to-retract axle gearbox (D) is connected to the gearbox suspension seat (A-6) via a gearbox suspension rod (H); One side of the 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 to the easy-to-retract shaft type gear box (D) in a rubber node suspension manner.

2. The power bogie based on the easy-to-retract axle gearbox and the side beam single-point suspension motor as claimed in claim 1, characterized in that: The gearbox housing (D-1) of the easy-to-retract gearbox (D) is provided with an axle mounting hole (D-1-1) and a motor coupling mounting hole (D-1-2) in the middle thereof. Four motor flexible suspension rubber node seat holes (D-2) distributed in an isosceles trapezoid are fixedly connected on the same side of the gearbox housing (D-1) around the motor coupling mounting hole (D-1-2). The included angle β between the center of each of the two motor flexible suspension rubber node seat holes (D-2) located at the bottom and the line connecting the hole center of the motor coupling mounting hole (D-1-2) is 100° to 140°, and the optimal value is 120°. A gearbox housing vertical stopper (D-4) is fixedly connected to the outer wall of the gearbox housing (D-1) at the intersection of the extended line of the center line of the axle mounting hole (D-1-1) and the motor coupling mounting hole (D-1-2) and the gearbox housing (D-1); a housing vertical suspension rod seat (D-3) is also fixedly connected to the outer wall of the gearbox housing (D-1) below the gearbox housing vertical stopper (D-4), and rubber vibration-damping gaskets are provided at both ends of the gearbox suspension rod (H), which are used to elastically connect the housing vertical suspension rod seat (D-3) and the gearbox suspension seat (A-6).

3. The power bogie based on the easy-to-retract axle gearbox and the side beam single-point suspension motor as claimed in claim 2, characterized in that: The lower part of the rear end cover of the housing 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 half-ring clamp (E-2); the upper part of the rear end cover of the housing 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 directly above the motor vertical limit stop (A-10), and the gap value between the two ranges from 10 to 50 mm; the motor housing at the end where the motor output shaft of the side beam single-point suspension motor (E) is located is fixedly connected to the four motor flexible suspension rubber node seat holes (D-2) in an elastic suspension manner through four motor flexible suspension rubber nodes (D-5); the motor output shaft of the side beam single-point suspension motor (E) is rotationally connected to the reduction gear mechanism inside the motor coupling mounting hole (D-1-2) through a coupling (E-3).

4. The power bogie based on the easy-to-retract axle gearbox and the side beam single-point suspension motor as claimed in claim 1, characterized in that: The outer diameter of the gearbox mounting shaft section (d-1) of the axle (d) is reduced to 80% of the original value, forming a small-diameter gearbox mounting shaft section (d-3); the easy-to-retract gearbox (D) also includes a radially thickened sleeve (D-7) of the inner ring of the easy-to-retract large gear bearing and two large gear bearing end covers (D-6) provided with a screw hole array; The inner diameter of the radially thickened sleeve (D-7) of the inner ring of the easy-to-retract large gear bearing is the same as the outer diameter of the small-diameter gear box mounting shaft section (d-3), and the two are coaxially fixed by press-fitting; the inner ring (s-3-1) of the large gear bearing (s-3) is coaxially fixed to the outer diameter of the radially thickened sleeve (D-7) of the inner ring of the easy-to-retract large gear bearing by press-fitting; the radial outer circumferential end surface of the radially thickened sleeve (D-7) of the inner ring of the easy-to-retract large gear bearing is provided with a The radially opened screw hole array and the two large gear bearing end covers (D-6) are respectively fixedly connected to the front and rear end surfaces of the radially thickened sleeve (D-7) of the inner ring of the easy-to-retract large gear bearing through bolt groups along the circumferential array, and the front and rear end surfaces of the large gear bearing (s-3) are sealed in the axle mounting hole (D-1-1); the flanges of the gear box brush mechanism (D-8) are coaxially fixedly connected to the corresponding screw holes on the outer diameter side wall of the axle mounting hole (D-1-1) through multiple bolts.

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