CN111703462B

CN111703462B - Bogie for railway vehicle and railway vehicle

Info

Publication number: CN111703462B
Application number: CN202010575730.XA
Authority: CN
Inventors: 吴坡; 郑建科; 李敬宝; 段泽斌; 金静飞; 王明峰; 王伟
Original assignee: CRRC Tangshan Co Ltd
Current assignee: CRRC Tangshan Co Ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-07-30
Anticipated expiration: 2040-06-22
Also published as: CN111703462A

Abstract

The embodiment of the application provides a bogie for a railway vehicle and the railway vehicle. A bogie, comprising: the wheel set comprises an axle and two wheels fixed on the axle; the axle-box bearing and the wheel-set axle-box, two axle-box bearings are arranged on the axle of the same wheel set and between two wheels, and the wheel-set axle-box is arranged on the axle-box bearings; a frame and a series of steel springs; the framework includes: the side beam comprises two primary mounting parts and a connecting part for connecting the two primary mounting parts; the connecting parts of the two side beams are oppositely sunken in the transverse direction; a cross member connecting the connecting portions of the two side members; wherein a tie steel spring is mounted on the axle box of the wheel sets, and a tie mounting portion of the side sill is seated on the tie steel spring so that the frame is seated on both wheel sets. The railway vehicle comprises the bogie. The embodiment of the application solves the technical problems that the existing motor direct-drive bogie is complex in structure and large in mass.

Description

Bogie for railway vehicle and railway vehicle

Technical Field

The application relates to the technical field of railway vehicles, in particular to a bogie for a railway vehicle and the railway vehicle.

Background

The traditional bogie has a complex structure and large mass. The heavier components of the truck include the axle, wheelset, frame, etc. The wheelset axle boxes of the conventional bogie usually adopt an axle box external mode, namely the wheelset axle boxes are positioned at the outer sides of two wheels of the same wheelset, so that the length of an axle for mounting the axle boxes is small, and the mass of the bogie is large. In addition, the frame of the bogie with the external axleboxes has a large size in the transverse direction, so that the mass of the frame is also large.

Therefore, the existing bogie has a complex structure and large mass, and is a technical problem which needs to be solved urgently by a person skilled in the art.

The above information disclosed in the background section is only for enhancement of understanding of the background of the present application and therefore it may contain information that does not form the prior art that is known to those of ordinary skill in the art.

Disclosure of Invention

The embodiment of the application provides a bogie for a railway vehicle and the railway vehicle, and aims to solve the technical problems that an existing motor direct-drive bogie is complex in structure and large in mass.

The embodiment of the application provides a bogie for rail vehicle includes:

the wheel pair comprises an axle and two wheels fixed on the axle;

the axle-box bearing and the wheel-set axle-box, the two axle-box bearings are installed on the axle of the same wheel set and between the two wheels, and the wheel-set axle-box is installed on the axle-box bearings;

a frame and a series of steel springs; the frame includes:

the side beam comprises two primary mounting parts and a connecting part for connecting the two primary mounting parts; the connecting parts of the two side beams are oppositely sunken in the transverse direction;

a cross member connecting the connecting portions of the two side members;

wherein the set of steel springs is mounted on the wheelset axle boxes and a set of mounting portions of the side beams are seated on the set of steel springs so that the frame is seated on both of the wheelsets.

The embodiment also provides the following technical scheme:

a rail vehicle comprises the bogie.

Due to the adoption of the technical scheme, the embodiment of the application has the following technical effects:

the width of the track determines the distance between two wheels of the same wheel pair; the wheel-set axle box is arranged between two wheels of the same wheel set, namely, the wheel-set axle box adopts a built-in mode; correspondingly, the distance between the opposite primary mounting parts of the two side beams is determined, and the connecting parts of the two side beams are recessed towards each other in the transverse direction, namely the distance between the opposite connecting parts of the two side beams in the transverse direction is smaller than the distance between the opposite primary mounting parts of the two side beams; correspondingly, the length of the cross beam in the transverse direction is also smaller. A series of steel springs are mounted on the axle boxes of the wheelsets, and a series of mounting portions of the side beams are seated on the series of steel springs, thereby achieving seating of the frame on both of the wheelsets. According to the bogie provided by the embodiment of the application, the framework of the bogie is small in transverse size, the mass of the framework is small, the unsprung mass of the bogie is small, and the trend of light weight development of the bogie is met.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a perspective view of a truck for a rail vehicle according to an embodiment of the present application;

FIG. 2 is a top view of the truck shown in FIG. 1;

FIG. 3 is a side view of the truck shown in FIG. 1;

FIG. 4 is a front view of the truck shown in FIG. 1;

FIG. 5 is a cross-sectional view A-A of the truck shown in FIG. 2;

FIG. 6 is a cross-sectional view B-B of the truck shown in FIG. 2;

FIG. 7 is a perspective view of the bogie of FIG. 2 with the wheel set and the permanent magnet direct drive motor integrally mounted;

FIG. 8 is a perspective view of a motor end cap of the truck shown in FIG. 1;

FIG. 9 is a schematic view of another angle of the motor end cap shown in FIG. 8;

FIG. 10 is a cross-sectional view of the motor end cap C-C shown in FIG. 8;

FIG. 11 is a perspective view of a wheelset axlebox of the truck shown in FIG. 1;

FIG. 12 is a perspective view of another angle of the wheelset axlebox of FIG. 11;

FIG. 13 is a perspective view of the frame of the truck shown in FIG. 1;

FIG. 14 is a top view of the frame of FIG. 12;

FIG. 15 is a side view of the frame of FIG. 12;

FIG. 16 is a front view of the frame of FIG. 12;

fig. 17 is a perspective view of a draft gear of the truck shown in fig. 1.

Description of reference numerals:

11-axle, 12-wheels,

2-wheel pair axle box, 21-axle box through hole, 22-axle box flanging, 221 axle box bolt hole, 23 butt-joint groove,

24-axle box one-line mounting interface, 25-axle box longitudinal mounting seat, 26-axle box vertical mounting seat,

3-a bearing for the axle box,

4-permanent magnet direct drive motor, 41-motor shell, 42-rotor,

43-motor end cover, 431-end cover shaft hole, 432-end cover main body, 432-1 end cover main body threaded hole,

433-flanging of the motor end cover, 433-1 bolt holes of the motor end cover,

434 abutting protrusions, 435-buckles, 436 sealing ring mounting grooves,

437 a longitudinal installation seat at the motor,

5-frame, 51-side beam, 511-series mounting part, 511-1 side beam-series mounting interface,

512-connecting part, 513-longitudinal mounting seat at side beam, 514-bending part,

515-transverse damper seat at the connection, 516-brake device mounting seat,

52-beam, 521-beam longitudinal mounting seat, 53-secondary mounting seat,

61-a first series steel spring, 62-a second series air spring,

71-side longitudinal links, 73-middle longitudinal links,

81-traction device, 811-transverse damper seat at traction device, 82-transverse damper.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Example one

FIG. 1 is a perspective view of a truck for a rail vehicle according to an embodiment of the present application; FIG. 2 is a top view of the truck shown in FIG. 1; FIG. 3 is a side view of the truck shown in FIG. 1; FIG. 4 is a front view of the truck shown in FIG. 1; FIG. 5 is a cross-sectional view A-A of the truck shown in FIG. 2; FIG. 6 is a cross-sectional view B-B of the truck shown in FIG. 2; FIG. 7 is a perspective view of the bogie of FIG. 2 with the wheel set and the permanent magnet direct drive motor integrally mounted; FIG. 13 is a perspective view of the frame of the truck shown in FIG. 1; FIG. 14 is a top view of the frame of FIG. 12; FIG. 15 is a side view of the frame of FIG. 12; fig. 16 is a front view of the frame of fig. 12.

In practice, as shown in fig. 1, 2, 3, 4, 5, 6, 7, 13, 14, 15 and 16, the bogie for a railway vehicle according to the embodiment of the present application includes:

the wheel set comprises two wheel sets arranged side by side, wherein each wheel set comprises an axle 11 and two wheels 12 fixed on the axles;

two axle box bearings 3 are mounted on the axle of the same wheelset at positions between the two wheels, and a wheelset axle box 2 is mounted on the axle box bearings 3;

a frame 5 and a series of springs; specifically, the first series of springs are steel springs 61; the frame 5 includes:

the side beam comprises two side beams 51 which are arranged in parallel, wherein two primary mounting parts 511 are arranged at two ends of each side beam 51, a connecting part 512 for connecting the two primary mounting parts is arranged in the middle of each side beam 51, and the connecting parts 512 of the two side beams are oppositely sunken in the transverse direction;

a cross member 52 connecting the connecting portions 512 of the two side members;

the steel spring 61 is mounted on the wheelset axle box 2, and the side member mounting portions 511 are seated on the steel spring 61, so that the frame 5 is seated on both wheelsets.

In practice, as shown in fig. 1 and 2, the bogie further comprises two secondary air springs 62;

the framework 5 further comprises two secondary mounting seats 53, and the two secondary mounting seats 53 are respectively fixed on the outer sides of the middle positions of the connecting parts 512 of the two side beams and protrude out of the two ends of the side beams in the transverse direction;

wherein, two of the secondary air springs 62 are mounted on the two secondary mounting seats 53.

In the prior art, the secondary mounting seats are arranged on the middle position of the side beam, and the position corresponds to the secondary air spring mounting seat of the vehicle body. In the bogie frame according to the embodiment of the present invention, the connecting portions of the two side members are recessed in the lateral direction, so that the space between the connecting portions of the two side members is reduced, and in order to match the position of the secondary air spring mounting seat of the vehicle body, the secondary mounting seat is disposed outside the middle position of the connecting portions of the two side members.

In an implementation, the bogie further comprises a tread braking device;

as shown in the figure, the frame further includes two brake device mounting seats 516, two brake device mounting seats 516 are fixed to the bottom of the middle position of the connecting portion of each side beam, and the two brake device mounting seats 516 are respectively exposed from two sides of the secondary mounting seat 53;

wherein the tread brake device is mounted at the brake device mounting seat.

Since the connecting portions of the side members are recessed inward, the space between the connecting portions of the two side members is small. The two braking device mounting seats are respectively exposed from two sides of the secondary mounting seat, so that mounting positions are provided for the tread braking devices, and the tread braking devices are matched with wheels.

In practice, as shown in fig. 6, two axle box primary mounting interfaces 24 are arranged at intervals along the longitudinal direction on the outer top of the wheel-pair axle box;

the inner top of the first series mounting part 511 of the side beam is provided with two first series mounting interfaces 511-1 of the side beam at intervals along the longitudinal direction;

every two of the primary steel springs 61 are respectively mounted with two axle box primary mounting interfaces 24 of the same wheel-pair axle box, and two side beam primary mounting interfaces 511-1 of the primary mounting interface are located on the two primary steel springs 61.

The outer top of each wheel-pair axle box is provided with two axle box primary mounting interfaces, correspondingly, the inner top of each primary mounting part is also provided with two side beam primary mounting interfaces, and the two axle box primary mounting interfaces and the two side beam primary mounting interfaces are arranged at intervals along the longitudinal direction. Thus, the frame and the axle are suspended by four groups of steel springs, so that the vertical, longitudinal and transverse acting forces can be transmitted better.

In implementation, as shown in fig. 6, the bottom of the connecting part of the side beam is provided with two side beam longitudinal mounting seats 513;

the wheel set axle box is provided with an axle box longitudinal mounting seat 25;

the bogie further comprises lateral longitudinal connecting rods 71, and two ends of each lateral longitudinal connecting rod 71 are respectively connected with the longitudinal mounting seats 25 at the axle boxes and the longitudinal mounting seats 513 at the side beams, so that longitudinal connection between the wheel pair axle boxes and the framework is realized.

In this way, a longitudinal connection of the axlebox and the frame is achieved.

In practice, as shown in fig. 6, 13 and 15, the ends of the side beams have downward bends 514;

the wheel set axle box is provided with an axle box vertical mounting seat 26;

the bogie further comprises a vertical lifting crane, wherein the upper end and the lower end of the vertical lifting crane are respectively connected with the inner side of the bending part 514 and the vertical mounting seat 26 at the axle box position, so that the vertical connection of the wheel pair axle box and the framework is realized.

In the transverse direction, a wheel pair axle box, a motor end cover, a motor shell, the motor end cover and the wheel pair axle box are sequentially and fixedly connected into a whole between two wheels, so that the movement of the wheel pair axle box along the axle in the transverse direction is limited. The side longitudinal connecting rods connect the wheel-set axle boxes with the bottoms of the connecting parts of the side beams of the framework, so that the wheel-set axle boxes are limited to move in the longitudinal direction; the vertical hoist connects the wheel-set axle-box to the frame, limiting movement of the wheel-set axle-box in the vertical direction. Synchronous operation of the frame and the wheel pair is realized through limitation in three directions.

In implementation, as shown in fig. 13 and 14, there are two cross beams 52, two cross beams 52 are parallel to each other, and each cross beam 52 is provided with a cross beam longitudinal mounting seat 521;

a motor shell of the permanent magnet direct drive motor is provided with a motor longitudinal mounting seat 437;

the bogie further comprises an intermediate longitudinal link 73; two ends of the middle longitudinal connecting rod 73 are respectively connected with the transverse beam longitudinal mounting seat 521 and the motor longitudinal mounting seat 437, so that the permanent magnet direct drive motor and the framework are longitudinally connected.

Therefore, the longitudinal connection between the permanent magnet direct drive motor and the framework is conveniently realized.

In practice, as shown in fig. 1, 2, 17, the bogie further comprises a traction device 81 and a transverse damper 82; the traction device 81 is arranged between the two cross beams 52, and the two sides of the traction device are provided with a transverse damper seat 811 at the traction device;

the middle position of the connecting part is provided with a connecting part transverse damper seat 515, and two ends of the transverse damper 82 are respectively connected with the traction device transverse damper seat 811 and the connecting part transverse damper seat 515, so that the transverse damping of the traction device is realized.

In this way, the damping of the traction device in the transverse direction is achieved by a simple construction.

In the implementation, rubber nodes are respectively arranged at two ends of the longitudinal connecting rod and are installed through bolts and cylindrical nuts;

wherein the longitudinal links include the middle longitudinal link and the side longitudinal links.

The rubber node can buffer vibration and curvilinear motion caused by unevenness of a part of the track.

Specifically, the distance between two axles of the bogie is 1600 mm.

The bogie adopts a small wheelbase of 1600 mm, and the longitudinal direction is minimized, so that the whole structure of the framework is smaller, the mass of the framework is lower, and the trend of light weight development of the framework and the bogie is met.

Example two

FIG. 8 is a perspective view of a motor end cap of the truck shown in FIG. 1; FIG. 9 is a schematic view of another angle of the motor end cap shown in FIG. 8; FIG. 10 is a cross-sectional view of the motor end cap C-C shown in FIG. 8; FIG. 11 is a perspective view of a wheelset axlebox of the truck shown in FIG. 1; figure 12 is a perspective view of the wheelset axlebox of figure 11 at another angle.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12, the bogie for a railway vehicle according to the embodiment of the present invention further has the following features.

In this embodiment, the inner ring of the axle-box bearing 3 is fitted and fixed to the outer circumferential surface of the axle 11, and the wheelset axle-box 2 is fitted and fixed to the outer circumferential surface of the outer ring of the axle-box bearing 3 so that the axle 11 can rotate relative to the wheelset axle-box 2;

the bogie further comprises:

the permanent magnet direct drive motor 4 is arranged between the two wheel set axle boxes 2 and comprises a motor shell 41, a rotor 42 and a stator;

the rotor 42 is fixedly sleeved on the outer peripheral surface of the axle 11 to directly drive the axle 11, the stator and the motor housing 41 are fixed into a whole and sleeved on the outer side of the rotor, the motor housing 41 and the wheel set axle box 2 are fixed into a whole, and the bearing 3 for the axle box is reused as a bearing for supporting the stator.

The bogie for the railway vehicle provided by the embodiment of the application has the following characteristics in the setting mode of the wheel pair axle box: firstly, two wheel-set axle boxes are fixed between two wheels, and the method belongs to a wheel-set axle box built-in mode; and then, the inner ring of the bearing for the axle box is fixed on the axle, and the wheel-set axle box is sleeved on the outer ring of the bearing for the axle box, namely, the outer ring of the bearing for the axle box plays a role in supporting the wheel-set axle box, so that the wheel, the axle and the inner ring of the bearing for the axle box are fixed together and can rotate relative to the wheel-set axle box. The setting mode of the permanent magnet direct drive motor as the drive motor has the following characteristics: firstly, the way that the rotor is fixed on the axle realizes the direct drive of the axle, namely the way that the permanent magnet direct drive motor directly drives the axle; secondly, the support required by the stator and the motor shell which are fixed into a whole is realized not by a mode of independently arranging a bearing, but by fixing the motor shell and the wheel-set axle box into a whole, the motor shell is realized, the stator and the wheel-set axle box are fixed into a whole, and the wheel-set axle box is sleeved on the outer ring of the bearing for the axle box, so that the outer ring of the bearing for the axle box also plays a supporting role for the stator and the motor shell, namely the bearing for the axle box is reused as a bearing for supporting the stator and the motor shell. According to the bogie for the railway vehicle, the length of the axle is shorter due to the built-in mode of the wheel set axle box, so that the mass of the axle is smaller; the axle box is with one set of bearing, and the mode of supporting wheel pair axle box and stator and motor housing simultaneously no longer need set up the bearing alone for stator and motor housing alone for the simple structure of whole bogie, unsprung mass is less, accords with the lightweight development trend of bogie.

The axle box bearing is multiplexed into a specific form of a bearing that supports the stator and the motor case. As shown in fig. 2, 5 and 7, the motor housing 41 is a cylindrical motor housing;

as shown in fig. 5, 7, 8, 9 and 10, the permanent-magnet direct-drive motor 4 further includes two motor end covers 43, and the motor end covers 43 have end cover shaft holes 431 penetrating therethrough; the two motor end covers 43 are respectively fixed at two ends of the motor housing 41, and the axle 11 passes through the two end cover shaft holes 431 and the hollow part of the motor housing;

two the motor end cover 43 is located respectively between motor housing 41 and two the wheel pair axle box 2, and is located same one side motor end cover 43 with the wheel pair axle box 2 is fixed, in order to realize motor housing 41 with the wheel pair axle box 2 is fixed as an organic whole, motor end cover 43 multiplexing is as the end cover of wheel pair axle box.

The motor end covers are the motor end covers of the permanent magnet direct drive motor, are fixed at two ends of a motor shell and are positioned between the motor shell and the wheel set axle box; on the other hand, the motor end cover and the wheel-set axle box which are positioned on the same side are fixed, so that a motor shell and the wheel-set axle box are fixed into a whole through the motor end cover; meanwhile, the motor end cover is used as the end cover of the wheel set axle box, so that one part has multiple functions, the parts of the bogie are fewer, and the quality of the bogie is favorably controlled.

Specifically, the motor housing is a cylindrical motor housing.

Specifically, the end cover shaft hole is located in the middle of the motor end cover.

Specifically, the rotor and the stator are both located in the motor housing, and the stator is fixed with the motor housing.

The specific structure of the motor end cover is related.

In practice, as shown in fig. 8, 9 and 10, the motor end cover 43 includes:

an end cap body 432, the end cap shaft hole 431 passing through the middle of the end cap body 432;

the hole wall of the end cover shaft hole protrudes from one side of the end cover main body 432, and the motor end cover flange 433 is arranged on the outer side of the protruding part; the motor end cover flanging is provided with a motor end cover bolt hole 433-1;

as shown in fig. 11 and 12, the wheelset axle box 2 has an axle box through hole 21, and the axle box through hole 21 is fitted to the outer ring of the axle box bearing 3; one end of the axle box through hole 21 is convexly provided with an axle box flange 22, and the axle box flange 22 is provided with an axle box bolt hole 221;

the motor end cover 43 and the wheel set axle box 2 are fixed through bolts, nuts, motor end cover bolt holes 433-1 and axle box bolt holes 221.

One side of the motor end cover is provided with a motor end cover flanging, and the motor end cover flanging is provided with a motor end cover bolt hole; one side of the wheel set axle box is provided with an axle box flanging, the axle box flanging is provided with an axle box bolt hole, and the motor end cover flanging and the axle box flanging are fixed together through the matching of a motor end cover bolt hole, an axle box bolt hole, a bolt and a nut, so that the motor end cover and the wheel set axle box are fixed together.

In implementation, as shown in fig. 8, 9 and 10, the hole wall of the end cover shaft hole protrudes from the motor end cover flange to serve as a butt-joint protrusion 434, and the axle box through hole has a butt-joint groove 23 at a side where the axle box flange is disposed;

the butt joint of the butt joint protrusion 434 and the butt joint groove 23 realizes the alignment of the motor end cover and the wheel-pair axle box.

The existence of butt joint protruding and butt joint recess, realization end cover shaft hole that can be convenient and axle box through-hole counterpoint on length direction, can be convenient realization axle box bolt hole and motor end cover bolt hole counterpoint through rotating for the fixed simple operation of motor end cover and wheel pair axle box.

In an implementation, as shown in fig. 9 and 10, the motor end cover 43 further includes:

a clasp 435 that is an end-to-end closed shape clasp 435; the buckle 435 and the motor end cover flange 433 are respectively arranged on two opposite sides of the end cover main body 432;

two end faces of the motor shell are respectively provided with a clamping groove;

the two motor end covers and the motor shell are installed in a clamping and matching mode through the buckles and the clamping grooves;

the end cover main body 432 is provided with an end cover main body threaded hole 432-1, the motor shell is provided with a motor shell threaded hole matched with the end cover threaded hole, and the end cover main body threaded hole 432-1 and the motor shell threaded hole realize the fixed connection of the motor end cover and the motor shell through bolts;

the position of the buckle is matched with the clamping groove of the motor shell.

The motor end cover is simple in structure, and the motor end cover and the motor shell are fixed.

In practice, as shown in fig. 8 and 12, the motor end flange 433 and the pedestal flange 22 each have four lobes, and the four lobes are located at the four vertices of the rectangular frame;

the number of the axle box bolt holes 221 is four, and the four axle box bolt holes are respectively located at four lugs of the axle box flange 22;

the number of the motor end cover bolt holes 433-1 is four, and the motor end cover bolt holes are respectively located at four lugs of the motor end cover flanging 433.

The axle box bolt hole and the motor end cover bolt hole in the positions are matched with the bolt and the nut, and the motor end cover and the wheel pair axle box can be stably fixed together.

In practice, as shown in fig. 5 and 10, the end cap body 432 is a flat, cone-funnel shaped end cap body;

the motor end cover flange 433 is arranged at the conical funnel mouth part of the end cover main body 432, and the buckle 435 is arranged at the edge position of the conical funnel cylindrical structure of the end cover main body 432.

The motor end cover with the structure has a simple structure and is convenient to process and manufacture.

Specifically, as shown in fig. 8 and 9, the end cover body 432 is a conical funnel-shaped end cover body having a shape formed by cutting the upper and lower edges in parallel, so as to reduce the weight and avoid other parts of the bogie.

In an implementation, the bogie further comprises a sealing ring;

as shown in fig. 9, the end cover main body 432 is provided with sealing ring mounting grooves 436 in an end-to-end closed shape at the periphery of the end cover shaft hole;

the seal ring is disposed in the seal ring mounting groove 436 to effect a seal between the end cap body and the wheelset axle housing.

The sealing ring is matched with the sealing ring mounting groove, so that sealing between the motor end cover and the wheel set axle box is realized, and external dust is reduced from entering the wheel set axle box through the mounting positions of the motor end cover and the wheel set axle box.

Specifically, the motor housing is a cylindrical motor housing; the end cover shaft hole is located in the middle of the motor end cover.

The motor shell and the motor end cover with the structure are simple in structure and convenient to process and manufacture.

Specifically, the sealing ring mounting groove is an annular sealing ring mounting groove;

the clamping groove is an annular clamping groove, and the buckle is an annular buckle.

The annular sealing ring mounting groove is convenient to process and mount the sealing ring. The annular clamping groove is convenient to process and install the buckle conveniently.

Specifically, the axle is of a hollow shaft structure;

two wheels fixed on the same axle are symmetrically arranged;

the bearing for the axle box is a rolling bearing.

Specifically, the wheels and the axle are in interference fit;

the inner ring of the bearing for the axle box is in interference fit with the axle;

and the rotor and the axle are in interference fit.

EXAMPLE III

The embodiment of the application provides a railway vehicle, which comprises the bogie in the first embodiment or the second embodiment.

In the description of the present application and the embodiments thereof, it is to be understood that the terms "top", "bottom", "height", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In this application and its embodiments, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integral to; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application and its embodiments, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The above disclosure provides many different embodiments or examples for implementing different structures of the application. The components and arrangements of specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A bogie for a railway vehicle, comprising:

the wheel pair comprises an axle and two wheels fixed on the axle;

a frame and a series of steel springs; the frame includes:

a cross member connecting the connecting portions of the two side members; wherein said set of steel springs are mounted on said wheelset axle boxes and a set of mounting portions of said side beams are seated on said set of steel springs such that said frame is seated on both of said wheelsets;

the permanent magnet direct drive motor is arranged between the two wheel pair axle boxes; the permanent magnet direct drive motor comprises a motor end cover; the motor end cover includes:

the motor end cover is provided with an end cover shaft hole which penetrates through the end cover main body;

the motor end cover flanging is arranged on the outer side of the protruding part; the motor end cover flanging is provided with a motor end cover bolt hole;

the wheel set axle box is provided with an axle box through hole which is sleeved on the outer ring of the bearing for the axle box; one end of the axle box through hole is convexly provided with an axle box flanging, and the axle box flanging is provided with an axle box bolt hole;

the motor end cover and the wheel set axle box are fixed through bolts and nuts, and bolt holes of the motor end cover and bolt holes of the axle box.

2. The bogie of claim 1, further comprising two secondary air springs;

the framework further comprises two secondary mounting seats, the two secondary mounting seats are respectively fixed on the outer sides of the middle positions of the connecting parts of the two side beams and protrude out of the two ends of the side beams in the transverse direction;

and the two secondary air springs are arranged on the two secondary mounting seats.

3. The truck of claim 2 further comprising a tread brake;

the framework further comprises brake device mounting seats, two brake device mounting seats are fixed at the bottom of the middle position of the connecting part of each side beam, and the two brake device mounting seats are respectively exposed out of two sides of the secondary mounting seat;

wherein the tread brake device is mounted at the brake device mounting seat.

4. The bogie according to claim 3, wherein the outer top of the wheel-pair axle boxes are provided with two axle-box-train mounting interfaces spaced apart in the longitudinal direction;

the inner top of the first series of mounting parts of the side beams is provided with two first series of mounting interfaces of the side beams at intervals along the longitudinal direction;

every two one is steel spring and two axle box one of same wheel pair axle box are installed with the installation interface respectively, two curb girder one of one installation department is installed the interface and is located two one on the steel spring.

5. The bogie of claim 4, wherein the bottom of the connecting portion of the side beam is provided with two side beam longitudinal mounts;

the wheel set axle box is provided with an axle box longitudinal mounting seat;

the bogie further comprises side longitudinal connecting rods, and two ends of each side longitudinal connecting rod are respectively connected with the longitudinal mounting seat at the axle box and the longitudinal mounting seat at the side beam, so that longitudinal connection of the wheel pair axle box and the framework is realized.

6. The truck of claim 5 wherein the ends of the side beams have downward bends;

the wheel set axle box is provided with an axle box vertical mounting seat;

the bogie further comprises a vertical lifting crane, wherein the upper end and the lower end of the vertical lifting crane are respectively connected with the inner side of the bending part and the vertical mounting seat at the axle box, so that the wheel pair axle box and the framework are vertically connected.

7. A bogie as claimed in claim 6 in which there are two said cross beams, two said cross beams being parallel to each other, each said cross beam being provided with a cross beam longitudinal mount;

a motor shell of the permanent magnet direct drive motor is provided with a motor longitudinal mounting seat;

the bogie further comprises an intermediate longitudinal link; and two ends of the middle longitudinal connecting rod are respectively connected with the longitudinal mounting seat at the cross beam and the longitudinal mounting seat at the motor, so that the longitudinal connection between the permanent magnet direct drive motor and the framework is realized.

8. The truck of claim 7 further comprising a traction device and a transverse damper; the traction device is arranged between the two beams, and the two sides of the traction device are provided with the transverse shock absorber seats at the traction device;

the middle position of the connecting part is provided with a transverse shock absorber seat at the connecting part, and two ends of the transverse shock absorber are respectively connected with the transverse shock absorber seat at the traction device and the transverse shock absorber seat at the connecting part, so that the shock absorption of the traction device in the transverse direction is realized.

9. The bogie according to claim 8, wherein the longitudinal connecting rod is provided at both ends thereof with rubber nodes, respectively, and is mounted by bolts and cylindrical nuts;

10. The bogie according to claim 9, wherein the inner race of the axle box bearing is fixedly fitted to the outer peripheral surface of the axle; the wheelset axle box is sleeved on the outer peripheral surface of the outer ring of the axle box bearing so that the axle can rotate relative to the wheelset axle box;

the permanent magnet direct drive motor comprises a motor shell, a rotor and a stator;

the rotor is fixedly sleeved on the outer peripheral surface of the axle so as to directly drive the axle, the stator and the motor shell are fixed into a whole and sleeved on the outer side of the rotor, the motor shell and the wheel pair axle box are fixed into a whole, and the bearing for the axle box is reused as a bearing for supporting the stator and the motor shell.

11. The bogie of claim 10, wherein the motor housing is a cylindrical motor housing;

the number of the motor end covers is two; the two motor end covers are respectively fixed at two ends of the motor shell, and the axle penetrates through the axle holes of the two end covers and the hollow part of the motor shell;

two the motor end cover is located respectively motor housing and two between the wheel pair axle box, and be located with one side the motor end cover with the wheel pair axle box is fixed, in order to realize motor housing with the wheel pair axle box is fixed as an organic whole, the motor end cover is multiplexing to be the end cover of wheel pair axle box.

12. The bogie of claim 11, wherein the wall of the axle hole of the end cap protrudes from the flange of the end cap of the motor to serve as a docking protrusion, and the pedestal through hole has a docking groove at a side where the pedestal flange is disposed;

and the butt joint of the butt joint bulge and the butt joint groove realizes the alignment of the motor end cover and the wheel pair axle box.

13. The bogie of claim 12, wherein the motor end cap further comprises:

the buckle is in a closed shape connected end to end; the buckle and the motor end cover flanging are respectively arranged on two sides of the end cover main body, which are opposite to each other;

the end cover main body is provided with an end cover main body threaded hole, the motor shell is provided with a motor shell threaded hole matched with the end cover threaded hole, and the end cover main body threaded hole and the motor shell threaded hole are fixedly connected through a bolt;

14. The bogie of claim 13, wherein the motor end cap flange and the pedestal flange each have four lobes, and wherein each of the four lobes are located at four vertices of a rectangular frame;

the number of the axle box bolt holes is four, and the four axle box bolt holes are respectively positioned at four lugs of the axle box flanging;

the number of the motor end cover bolt holes is four, and the motor end cover bolt holes are respectively located at four convex lugs of the motor end cover flanging.

15. The truck of claim 14 wherein the end cap body is a flat cone funnel shaped end cap body;

the motor end cover flanging is arranged at the conical funnel mouth part of the end cover main body, and the buckle is arranged at the edge position of the conical funnel cylindrical structure of the end cover main body.

16. The truck of claim 15 wherein the end cap body is a conical funnel shaped end cap body having a top and bottom edge cut parallel to reduce weight and avoid other components of the truck.

17. The truck of claim 16 further comprising a seal ring;

the end cover main body is provided with sealing ring mounting grooves which are connected end to end and are in a closed shape at the periphery of the end cover shaft hole;

the seal ring is disposed in the seal ring mounting groove to effect sealing between the end cap body and the wheelset axle housing.

18. The bogie of claim 17, wherein the motor housing is a cylindrical motor housing; the end cover shaft hole is located in the middle of the motor end cover.

19. The truck of claim 18 wherein the seal ring mounting groove is an annular seal ring mounting groove;

20. The bogie of claim 19, wherein two wheels fixed to the same axle are symmetrically disposed; the axle is of a hollow shaft structure;

the bearing for the axle box is a rolling bearing.

21. A rail vehicle comprising a bogie as claimed in any one of claims 1 to 20.