WO2021258504A1

WO2021258504A1 - Bogie for railway vehicle and railway vehicle

Info

Publication number: WO2021258504A1
Application number: PCT/CN2020/106691
Authority: WO
Inventors: 郑建科; 王伟; 吴瑞梅; 王波; 邵立云; 廖胡兵; 吕海龙
Original assignee: 中车唐山机车车辆有限公司
Priority date: 2020-06-22
Filing date: 2020-08-04
Publication date: 2021-12-30
Also published as: CN111703461B; CN111703461A

Abstract

A bogie for a railway vehicle and a railway vehicle comprising same. The bogie comprises: a wheel set comprising an axle (11) and two wheels (12); two wheel set axle boxes (2) and two bearings (3) for the axle boxes, with inner rings of the bearings (3) for the axle boxes being fixed on the peripheral surface of the axle (11) in a sleeving manner and being located between the two wheels (12), and the wheel set axle boxes (2) being sleeved on the peripheral surface of outer rings of the bearings (3) for the axle boxes, so as to enable the axle (11) to rotate relative to the wheel set axle boxes (2); and a permanent magnet direct drive electric motor (4) arranged between the two wheel set axle boxes (2), with the permanent magnet direct drive electric motor (4) comprising an electric motor shell (41), a rotor (42) and a stator, the rotor (42) being fixed on the peripheral surface of the axle (11) in a sleeving manner, so as to directly drive the axle (11), the stator and the electric motor shell (41) being fixed into a whole and being sleeved on the outer side of the rotor (42), the electric motor shell (41) and the wheel set axle boxes (2) being fixed into a whole, and the bearings (3) for the axle boxes being reused as bearings which support the stator and the electric motor shell (41). The bogie solves the technical problem of the complex structure and large mass of a related electric motor direct drive bogie.

Description

Bogie for rail vehicle and rail vehicle

Technical field

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

Background technique

The traditional bogie drive system adds a transmission gearbox and a coupling on the basis of the traction motor. The gear meshing friction pair and gear coupling of the gear transmission will produce varying degrees of noise and vibration during the meshing process; the transmission process It will also cause power loss and reduce efficiency; in addition, the gear meshing friction pair will gradually wear out, repair and replacement will increase the operation and maintenance costs, etc., and also cause the quality of the bogie to be very large.

The motor direct-drive bogie refers to a bogie that removes the transmission components between the motor and the wheel set of the traditional bogie, and directly transmits the output torque or force of the traction motor to the wheel set. The design idea of this kind of bogie is to cancel the gear transmission system of the traditional bogie, and adopt a direct drive system without gear transmission. The feature of the direct drive bogie is that the motor directly drives the wheel pair, eliminating the need for gear transmission mechanism and motor suspension device. Link. The structure of the related motor direct-drive bogie is complicated, and the mass is still relatively large.

Therefore, the related motor direct-drive bogie has a complicated structure and a relatively large mass, which is an urgent technical problem to be solved by those skilled in the art.

The above-mentioned information disclosed in the background art is only used to enhance the understanding of the background of the present application, and therefore it may contain information that does not form related technologies known to those of ordinary skill in the art.

Summary of the invention

The embodiments of the present application provide a bogie for a rail vehicle and a rail vehicle, so as to solve the technical problems of a related electric motor direct-drive bogie with a complicated structure and a large mass.

The embodiment of the present application provides a bogie for rail vehicles, including:

A wheel set, the wheel set includes an axle and two wheels sleeved and fixed on the outer peripheral surface of the axle;

Two wheel set axle boxes and two axle box bearings, the inner ring of the axle box bearings is sleeved and fixed on the outer peripheral surface of the axle and is located between the two wheels; the wheel set 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 wheel set axle box;

The permanent magnet direct drive motor is arranged between the two wheelset axle boxes, and the permanent magnet direct drive motor includes a motor housing, a rotor and a stator;

Wherein, the rotor is sleeved and fixed on the outer peripheral surface of the axle to directly drive the axle, the stator and the motor housing are fixed as a whole and sleeved on the outer side of the rotor, and the motor housing is connected to the outer periphery of the rotor. The wheel set axle box is fixed as a whole, and the axle box bearing is reused as a bearing supporting the stator and the motor housing.

This embodiment also provides the following technical solutions:

A rail vehicle includes the above-mentioned bogie.

Due to the adoption of the above technical solutions, the embodiments of the application have the following technical effects:

The setting method of the wheel set axle box has the following characteristics: First, the two wheel set axle boxes are fixed between the two wheels, which belongs to the built-in method of the wheel set axle box; secondly, the axle box is fixed on the axle with the inner ring of the bearing. , The wheel set axle box is sleeved on the outer ring of the axle box bearing, that is, the outer ring of the axle box bearing supports the wheel set axle box. In this way, the inner ring of the wheel, axle and axle box bearing is fixed on Together, and can rotate relative to the wheelset axle box. The permanent magnet direct drive motor as a drive motor has the following characteristics: first, the rotor is fixed on the axle to directly drive the axle, that is, the permanent magnet direct drive motor directly drives the axle; second, the stator is fixed as a whole The support required by the motor housing is not achieved by separately setting the bearing, but by fixing the motor housing and the wheel set axle box as a whole, so that the motor housing, the stator and the wheel set axle box are fixed as one body, and the wheel The axle box is sleeved on the outer ring of the axle box bearing, so that the outer ring of the axle box bearing also supports the stator and the motor housing, that is, the axle box bearing is reused as the opposite The stator and the motor housing support the bearing. In the bogie for rail vehicles of the embodiment of the application, the wheel-set axle box is built-in, and the length of the axle is shorter, which in turn makes the axle mass smaller; the axle box uses a set of bearings to support the wheel-set axle box and The method of the stator and the motor housing eliminates the need to separately provide separate bearings for the stator and the motor housing, which makes the structure of the bogie simple and the unsprung mass is small, which is in line with the development trend of lightweight bogies.

Description of the drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The exemplary embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation of the application. In the attached picture:

Fig. 1 is a three-dimensional schematic diagram of a bogie for rail vehicles according to an embodiment of the application;

Figure 2 is a top view of the bogie shown in Figure 1;

Figure 3 is a side view of the bogie shown in Figure 1;

Figure 4 is a front view of the bogie shown in Figure 1;

Figure 5 is an A-A sectional view of the bogie shown in Figure 2;

Figure 6 is a B-B sectional view of the bogie shown in Figure 2;

Fig. 7 is a perspective view of the wheelset of the bogie of Fig. 2 and the permanent magnet direct drive motor installed as a whole;

Figure 8 is a perspective view of the motor end cover of the bogie shown in Figure 1;

Fig. 9 is a schematic diagram of another angle of the motor end cover shown in Fig. 8;

Figure 10 is a cross-sectional view of the motor end cover C-C shown in Figure 8;

Figure 11 is a perspective view of the wheelset axle box of the bogie shown in Figure 1;

Figure 12 is a perspective view of the wheelset axle box shown in Figure 11 from another angle;

Figure 13 is a perspective view of the frame of the bogie shown in Figure 1;

Figure 14 is a top view of the frame described in Figure 12;

Figure 15 is a side view of the frame described in Figure 12;

Figure 16 is a front view of the frame described in Figure 12;

Fig. 17 is a perspective view of the traction device of the bogie shown in Fig. 1.

Description of reference signs:

11-axle, 12 wheels,

2-wheel axle box, 21- axle box through hole, 22- axle box flange, 221 axle box bolt hole, 23 butt groove,

24-axis box primary installation interface, 25-axis box longitudinal mounting seat, 26-axis box vertical mounting seat,

3-axle box bearings,

4-permanent magnet direct drive motor, 41-motor housing, 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-Motor end cover flanging, 433-1 motor end cover bolt hole,

434 butt bump, 435-buckle, 436 sealing ring installation groove,

437 Longitudinal mounting seat at the motor,

5-Frame, 51-side beam, 511-first series installation part, 511-1 side beam first-series installation interface,

512-Connecting part, 513-Longitudinal mounting seat at side beam, 514-Bending part,

515-transverse shock absorber seat at the connection part, 516-braking device mounting seat,

52-cross beam, 521 longitudinal mounting seat at the cross beam, 53-second series mounting seat,

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

71-side longitudinal link, 72-vertical lifting, 73-middle longitudinal link,

81-traction device, 811-transverse shock absorber seat at the traction device, 82-transverse shock absorber.

detailed description

In order to make the technical solutions and advantages of the embodiments of the present application clearer, the exemplary embodiments of the present application are described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and Not all examples are exhaustive. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other if there is no conflict.

Example one

Fig. 1 is a perspective schematic view of a bogie for rail vehicles according to an embodiment of the application; Fig. 2 is a top view of the bogie shown in Fig. 1; Fig. 3 is a side view of the bogie shown in Fig. 1; Fig. 4 Fig. 1 is a front view of the bogie shown in Fig. 1; Fig. 5 is an AA cross-sectional view of the bogie shown in Fig. 2; Fig. 6 is a BB cross-sectional view of the bogie shown in Fig. 2; Fig. 7 is a wheel of the bogie shown in Fig. 2 Fig. 8 is a perspective view of the motor end cover of the bogie shown in Fig. 1; Fig. 9 is a schematic diagram of another angle of the motor end cover shown in Fig. 8; Fig. 10 Fig. 8 is a cross-sectional view of the motor end cover CC; Fig. 11 is a perspective view of the wheel set axle box of the bogie shown in Fig. 1; Fig. 12 is a perspective view of the wheel set axle box shown in Fig. 11 from another angle.

As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11 and Fig. Shelves, including:

A wheel set, the wheel set includes an axle 11 and two wheels 12 sleeved and fixed on the outer peripheral surface of the axle;

Two wheelset axle boxes 2 and two axle box bearings 3, the inner ring of the axle box bearing 3 is sleeved and fixed on the outer peripheral surface of the axle 11 and located between the two wheels 12, The axle box 2 is sleeved on the outer peripheral surface of the outer ring of the axle box bearing 3, so that the axle 11 can rotate relative to the wheel set axle box 2;

The permanent magnet direct drive motor 4 is arranged between the two wheelset axle boxes 2. The permanent magnet direct drive motor includes a motor housing 41, a rotor 42 and a stator;

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

In the bogies for rail vehicles in the embodiments of the present application, the wheel-set axle boxes are arranged with the following characteristics: First, the two wheel-set axle boxes are fixed between the two wheels, which belongs to the built-in wheel-set axle box; Secondly, the inner ring of the axle box bearing is fixed on the axle, and the wheel set axle box is sleeved on the outer ring of the axle box bearing, that is, the outer ring of the axle box bearing supports the wheel set axle box. In this way, the wheel , The inner ring of the axle and the axle box bearing is fixed together and can rotate relative to the wheel set axle box. The permanent magnet direct drive motor as a drive motor has the following characteristics: firstly, the rotor is fixed on the axle to directly drive the axle, that is, the permanent magnet direct drive motor directly drives the axle; secondly, it is fixed as an integral stator The support required by the motor housing is not achieved by separately setting the bearing, but by fixing the motor housing and the wheel set axle box as a whole, so that the motor housing, the stator and the wheel set axle box are fixed as one body, and the wheel The axle box is sleeved on the outer ring of the axle box bearing, so that the outer ring of the axle box bearing also supports the stator and the motor housing, that is, the axle box bearing is reused as the opposite The stator and the motor housing support the bearing. In the bogie for rail vehicles of the embodiment of the application, the wheel-set axle box is built-in, and the length of the axle is shorter, which in turn makes the axle mass smaller; the axle box uses a set of bearings to support the wheel-set axle box and The method of the stator and the motor housing eliminates the need to separately provide separate bearings for the stator and the motor housing, which makes the structure of the entire bogie simple and the unsprung mass is small, which is in line with the development trend of lightweight bogies.

Regarding the specific manner in which the bearing for the axle box is reused as the bearing supporting the stator and the motor housing. As shown in Figures 2, 5 and 7, the motor housing 41 is a cylindrical motor housing.

As shown in Figure 5, Figure 7, Figure 8, Figure 9 and Figure 10, the permanent magnet direct drive motor 4 further includes two motor end covers 43, the motor end cover 43 has a through end cover shaft hole 431; The two motor end covers 43 are respectively fixed on the 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;

The two motor end covers 43 are respectively located between the motor housing 41 and the two wheelset axle boxes 2, and the motor end cover 43 and the wheelset axle box 2 on the same side are fixed to The motor housing 41 and the wheelset axle box 2 are fixed as a whole, and the motor end cover 43 is reused as the end cover of the wheelset axle box.

On the one hand, the motor end cover is the motor end cover of the permanent magnet direct drive motor, which is fixed on both ends of the motor housing and is located between the motor housing and the wheelset axle box; The wheel set axle box is fixed, so that the motor housing and the wheel set axle box are fixed as a whole through the motor end cover; at the same time, the motor end cover serves as the end cover of the wheel set axle box, achieving multiple functions of one component, so that The bogie has fewer parts, which is beneficial to control the quality of the bogie.

Specifically, the motor housing is a cylindrical motor housing.

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

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

Regarding the specific structure of the motor end cover.

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

An end cover main body 432, the end cover shaft hole 431 passes through the middle of the end cover main body 432;

The motor end cover flange 433, 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 provided on the outer side of the protruding part; the motor end The cover flange has bolt holes 433-1 for the motor end cover;

As shown in Figures 11 and 12, the wheelset axle box 2 has an axle box through hole 21, and the axle box through hole 21 is sleeved on the outer ring of the axle box bearing 3; the axle box through hole One end of 21 is convexly provided with an axle box flange 22, and the axle box flange 22 has an axle box bolt hole 221;

The motor end cover 43 and the wheelset axle box 2 are fixed by bolts, nuts, the motor end cover bolt holes 433-1 and the axle box bolt holes 221.

One side of the motor end cover is provided with a motor end cover flange, the motor end cover flange has a motor end cover bolt hole; the wheel set axle box is provided with an axle box flange, and the axle box flange has an axle box bolt hole, Through the bolt hole of the motor end cover, the bolt hole of the axle box, the bolt and the nut, the flange of the motor end cover and the flange of the axle box are fixed together, and then the motor end cover and the wheelset axle box are fixed together.

In implementation, as shown in Fig. 8, Fig. 9 and Fig. 10, the hole wall of the end cover shaft hole protrudes from the flange of the motor end cover as a butting protrusion 434, and the shaft box through hole is installed in the shaft box One side of the flanging has a butting groove 23;

The docking protrusion 434 and the docking groove 23 are docked to realize the alignment of the motor end cover and the wheelset axle box.

The presence of the alignment protrusions and the butting grooves can facilitate the alignment of the shaft hole of the end cover and the through hole of the shaft box in the length direction, and the bolt hole of the shaft box and the bolt hole of the motor end cover can be easily realized by turning. The alignment makes the fixing operation of the motor end cover and the wheel set axle box convenient.

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

A buckle 435, the buckle is a closed shape buckle 435 connected end to end; the buckle 435 and the motor end cover flange 433 are respectively arranged on opposite sides of the end cover main body 432;

The two end faces of the motor housing are respectively provided with clamping slots;

The two motor end caps and the motor housing are installed in cooperation with each other through the buckle and the card slot;

The end cover body 432 has an end cover body threaded hole 432-1, and the motor housing has a motor housing threaded hole that matches with the end cover threaded hole. Through a bolt, the end cover body threaded hole 432-1 is The threaded hole of the motor housing realizes the fixed connection between the motor end cover and the motor housing;

Wherein, the position of the buckle is matched with the slot of the motor housing.

The buckle and the slot, the threaded hole of the main body of the end cover, the threaded hole and the bolt of the motor shell, and the simple structure realize the fixation of the motor end cover and the motor shell.

In implementation, as shown in FIGS. 8 and 12, the motor end cover flange 433 and the axle box flange 22 each have four lugs, and the four lugs are located at the four vertices of the rectangular frame. ；

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

There are four motor end cover bolt holes 433-1, and they are respectively located at the four lugs of the motor end cover flange 433.

The bolt hole of the axle box and the bolt hole of the motor end cover in this position, matched with the bolt and nut, can firmly fix the motor end cover and the wheel set axle box together.

In implementation, as shown in FIGS. 5 and 10, the end cap body 432 is a flat, tapered funnel-shaped end cap body;

The motor end cover flange 433 is arranged at the cone-shaped funnel nozzle of the end cover main body 432, and the buckle 435 is disposed at the edge position of the cone-shaped funnel cylindrical structure of the end cover main body 432.

The motor end cover with the above structure has a simple structure and is convenient for processing and manufacturing.

Specifically, as shown in Figures 8 and 9, the end cap body 432 is an end cap body with a tapered funnel cylindrical structure formed by cutting the upper and lower edges in parallel to reduce weight and avoid other parts of the bogie. part.

In implementation, the bogie also includes a sealing ring;

As shown in FIG. 9, the end cap main body 432 is provided with a closed-shaped sealing ring installation groove 436 connected end to end at a position on the periphery of the end cap shaft hole;

The sealing ring is placed in the sealing ring installation groove 436 to achieve a seal between the end cover main body and the wheelset axle box.

The sealing ring and the sealing ring installation groove are matched to realize the seal between the motor end cover and the wheel set axle box, and reduce external dust entering the inside of the wheel set axle box through the installation place 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 housing and motor end cover with the above-mentioned structure are simple in structure and easy to process and manufacture.

Specifically, the seal ring installation groove is an annular seal ring installation groove;

The card slot is a ring-shaped card slot, and the buckle is a ring-shaped buckle.

The annular sealing ring installation groove is convenient for processing and installation of the sealing ring. The ring-shaped slot is convenient for processing and installation of the buckle.

Specifically, the axle is an axle with a hollow shaft structure;

Two wheels fixed on the same axle are arranged symmetrically;

The bearing for the axle box is a rolling bearing.

Specifically, there is an interference fit between the wheel and the axle;

There is an interference fit between the inner ring of the axle box bearing and the axle;

There is an interference fit between the rotor and the axle.

Example two

On the basis of the first embodiment, the bogie for rail vehicles of the embodiment of the present application also has the following characteristics.

In implementation, as shown in Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 13, Figure 14, Figure 15, and Figure 16, the bogie also includes a frame 5 and a series of suspension devices; the frame 5 includes :

Two side beams 51 are arranged in parallel. Both ends of the side beam 51 are two primary mounting parts 511, and the middle is a connecting part 512 connecting the two primary mounting parts. The connection of the two side beams The portions 512 are recessed oppositely in the lateral direction;

The cross beam 52 connects the connecting portions 512 of the two side beams;

Wherein, the first suspension device is installed on the wheelset axle box 2, the first installation part 511 of the side beam is seated on the first suspension device, and the frame 5 is seated on two Above the wheel set 12.

The width of the track determines the distance between the two wheels of the same wheel set; the wheel set axle box is arranged between the two wheels of the same wheel set, that is, the wheel set axle box is built-in; correspondingly, the two side beams are opposite The distance between the primary installation parts is also determined. The connecting parts of the two side beams are recessed in the transverse direction, that is, the distance between the opposite connecting parts of the two side beams in the transverse direction is smaller than that of the primary installation of the two side beams. Correspondingly, the length of the beam in the transverse direction is also smaller. In this way, the size of the bogie frame in the lateral direction is small, the mass of the frame is also small, and the unsprung mass of the bogie is also small, which is in line with the development trend of lightweight bogies.

In implementation, as shown in Figure 1 and Figure 2, the bogie also includes two secondary air springs 62;

The frame 5 also includes two secondary mounting seats 53, which are respectively fixed on the outside of the middle position of the connecting portion 512 of the two side beams, and protrude from the lateral direction. Both ends of the side beams;

Among them, the two secondary air springs 62 are mounted on the two secondary mounting seats 53.

In the related art, the second-series mounting seats are all set on the middle position of the side beams, and this position also corresponds to the second-series air spring mounting seat of the vehicle body. In the bogie frame of the embodiment of the present application, since the connecting parts of the two side beams are recessed in the transverse direction, the space between the connecting parts of the two side beams is reduced, in order to cooperate with the secondary air spring of the car body The position of the mounting seat is the frame of the bogie of the embodiment of the present application, and the setting position of the secondary mounting seat is outside the middle position of the connecting portion of the two side beams.

In implementation, the bogie also includes a tread brake device;

As shown in the figure, the frame further includes a braking device mounting seat 516, and two braking device mounting seats 516 are fixed at the bottom of the middle position of the connecting portion of each side beam, and two braking devices Mounting seats 516 are respectively located on both sides of the second-series mounting seats 53;

Wherein, the tread brake device is installed at the brake device mounting seat.

In implementation, as shown in FIG. 6, the first suspension device includes a series spring 61;

The outer top of the wheelset axle box is provided with two axle box primary installation interfaces 24 at intervals along the longitudinal direction;

The inner top of the primary installation portion 511 of the side beam is provided with two side beam primary installation interfaces 511-1 at intervals along the longitudinal direction;

Every two of the primary springs 61 are respectively installed on the two axle box primary mounting interfaces 24 of the same wheelset axle box, and the two side beams of the primary mounting part are located on the two primary mounting interfaces 511-1. Above the first series of spring 61.

The outer top of each wheelset axle box is provided with two axle box primary installation interfaces. Correspondingly, the inner top of each primary installation part is also provided with two side beam primary installation interfaces, and the two axle boxes are one-series installation interfaces. The installation interface and the primary installation interface of the two side beams are arranged at intervals along the longitudinal direction. In this way, the frame and the axle are suspended by four sets of primary springs, which can better transmit the forces in the vertical, longitudinal and horizontal directions.

In implementation, as shown in Figure 6, the bottom of the connecting portion of the side beam is provided with two longitudinal mounting seats 513 at the side beam;

The wheel set axle box is provided with a longitudinal mounting seat 25 at the axle box;

The bogie also includes a side longitudinal link 71, both ends of the side longitudinal link 71 are respectively connected to the longitudinal mounting seat 25 at the axle box and the longitudinal mounting seat 513 at the side beam to realize the The longitudinal connection of the wheelset axle box and the frame.

In this way, the longitudinal connection of the axle box and the frame is realized.

In implementation, as shown in Figure 6, Figure 13 and Figure 15, the end of the side beam has a downward bending part 514;

The wheelset axle box is provided with a vertical mounting seat 26 at the axle box;

The bogie also includes a vertical lifting 72. The upper and lower ends of the vertical lifting 72 are respectively connected to the inner side of the bent portion 514 and the vertical mounting seat 26 at the axle box to realize the wheel The vertical connection of the axle box and the frame.

In the transverse direction, between the two wheels, there are the wheel set axle box, the motor end cover, the motor housing, the motor end cover, and the wheel set axle box are fixedly connected as a whole, which limits the movement of the wheel set axle box in the transverse direction along the axle. move. The side longitudinal link connects the wheel set axle box with the bottom of the connection part of the frame side beam, restricting the movement of the wheel set axle box in the longitudinal direction; the vertical lifting connects the wheel set axle box and the frame, restricting the wheel set axle box and the frame. The movement of the axle box in the vertical direction. The synchronous operation of the frame and the wheel set is realized through the restriction of three directions.

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

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

The bogie also includes a middle longitudinal link 73; both ends of the middle longitudinal link 73 are respectively connected to the longitudinal mounting seat 521 at the beam and the longitudinal mounting seat 437 at the motor to realize the permanent magnet direct drive The longitudinal connection of the motor and the frame.

In this way, the longitudinal connection of the permanent magnet direct drive motor and the frame is conveniently realized.

In implementation, as shown in Figure 1, Figure 2, Figure 17, the bogie also includes a traction device 81 and a transverse shock absorber 82; the traction device 81 is installed between the two beams 52, on both sides of the traction device The transverse shock absorber seat 811 where the traction device is provided;

Wherein, a transverse damper seat 515 at the connecting portion is provided in the middle of the connecting portion, and both ends of the transverse damper 82 are respectively connected to the transverse damper seat 811 at the traction device and the connecting portion. The transverse damper seat 515 is used to realize the damping of the traction device in the transverse direction.

In this way, the damping of the traction device in the transverse direction is realized through a simple structure.

In the implementation, the two ends of the longitudinal connecting rod are respectively provided with rubber nodes, which are installed by bolts and cylindrical nuts;

Wherein, the longitudinal link includes the middle longitudinal link and the side longitudinal link.

The rubber nodes can cushion part of the vibration and curve movement caused by the uneven track.

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

That is, the bogie adopts a small wheelbase of 1600 mm, and the longitudinal direction is minimized, so the overall structure of the frame is small, and the quality of the frame is low, which is in line with the development trend of lightweight construction of the frame and the bogie.

Example three

The embodiment of the present application provides a rail vehicle, including the bogie described in the first or second embodiment.

In the description of this application and its embodiments, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "height", etc. is based on the orientation or positional relationship shown in the drawings, and is only for It is convenient to describe the application and simplify the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore cannot be understood as a limitation of the application.

In this application and its embodiments, unless otherwise clearly stipulated and limited, the terms "set", "install", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, can be fixed The connection can also be detachable connection, or integrated; it can be mechanical connection, it can be electrical connection, it can also be communication; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components Or the interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood according to specific circumstances.

In the present application and its embodiments, unless expressly stipulated and defined otherwise, the "on" or "under" of the first feature of the second feature may include direct contact between the first feature and the second feature, or include the first feature. The second feature is not in direct contact but through another feature between them. Moreover, "above", "above" and "above" the second feature of the first feature include the first feature being directly above and obliquely above the second feature, or merely indicating that the level of the first feature is higher than that of the second feature. The “below”, “below”, and “below” of the first feature of the second feature include the first feature directly above and obliquely above the second feature, or it simply means that the level of the first feature is smaller than the second feature.

The above disclosure provides many different implementations or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described above. Of course, they are only examples, and are not intended to limit the application. In addition, the present application may repeat reference numerals and/or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and/or settings discussed. In addition, this application provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and/or the use of other materials.

Although some optional embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be interpreted as including some optional embodiments and all changes and modifications falling within the scope of this application.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application also intends to include these modifications and variations.

Claims

A bogie for rail vehicles, which is characterized in that it comprises:

A wheel set, the wheel set includes an axle and two wheels sleeved and fixed on the outer peripheral surface of the axle;

Two wheel set axle boxes and two axle box bearings, the inner ring of the axle box bearings is sleeved and fixed on the outer peripheral surface of the axle and is located between the two wheels; the wheel set 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 wheel set axle box;

The permanent magnet direct drive motor is arranged between the two wheelset axle boxes, and the permanent magnet direct drive motor includes a motor housing, a rotor and a stator;

Wherein, the rotor is sleeved and fixed on the outer peripheral surface of the axle to directly drive the axle, the stator and the motor housing are fixed as a whole and sleeved on the outer side of the rotor, and the motor housing is connected to the outer periphery of the rotor. The wheel set axle box is fixed as a whole, and the axle box bearing is reused as a bearing supporting the stator and the motor housing.
The bogie according to claim 1, wherein the motor housing is a cylindrical motor housing;

The permanent magnet direct drive motor further includes two motor end covers, the motor end covers have end cover shaft holes penetrating through; the two motor end covers are respectively fixed on both ends of the motor housing, and the axle passes through Pass through the two shaft holes of the end cover and the hollow part of the motor housing;

The two motor end covers are respectively located between the motor housing and the two wheelset axle boxes, and the motor end cover and the wheelset axle box on the same side are fixed to realize the motor housing It is fixed as a whole with the wheel set axle box, and the motor end cover is reused as the end cover of the wheel set axle box.
The bogie according to claim 2, wherein the motor end cover comprises:

An end cover main body, the end cover shaft hole passes through the middle of the end cover main body;

The motor end cover is flanged, the hole wall of the end cover shaft hole protrudes from one side of the end cover main body, and the motor end cover flange is provided on the outer side of the protruding part; the motor end cover flange With bolt holes for the motor end cover;

The wheelset axle box has an axle box through hole, and the axle box through hole is sleeved on the outer ring of the axle box bearing; one end of the axle box through hole is convexly provided with an axle box flange, and the axle Box flanges have axle box bolt holes;

The motor end cover and the wheelset axle box are fixed by bolts, nuts, bolt holes of the motor end cover and the axle box bolt holes.
The bogie according to claim 3, wherein the wall of the shaft hole of the end cover protrudes from the flange of the motor end cover as a butting protrusion, and the axle box through hole is provided with the flange of the axle box. Has a butting groove on one side;

The butting protrusion and the butting groove are butted to realize the alignment of the motor end cover and the wheel set axle box.
The bogie according to claim 4, wherein the motor end cover further comprises:

A buckle, the buckle is a closed-shape buckle connected end to end; the buckle and the flange of the motor end cover are respectively arranged on opposite sides of the end cover main body;

The two end faces of the motor housing are respectively provided with clamping slots;

The two motor end caps and the motor housing are installed in cooperation with each other through the buckle and the card slot;

The end cover body has a threaded hole of the end cover body, the motor housing has a threaded hole of the motor housing that matches with the threaded hole of the end cover. The fixed connection between the motor end cover and the motor housing.
The bogie according to claim 5, wherein the motor end cover flange and the axle box flange each have four lugs, and the respective four lugs are located at the four vertices of the rectangular frame ；

There are four axle box bolt holes, and they are respectively located at the four lugs of the axle box flange;

There are four bolt holes of the motor end cover, and they are respectively located at the four lugs of the flange of the motor end cover.
The bogie according to claim 6, wherein the end cover body is a flat cone-shaped funnel-shaped end cover body;

The flange of the motor end cover is arranged on the cone-shaped funnel nozzle of the end cover main body, and the buckle is arranged at the edge position of the cone-shaped funnel cylindrical structure of the end cover main body.
The bogie according to claim 7, wherein the end cap body is a cone-shaped funnel cylindrical structure formed by cutting the upper and lower edges in parallel to reduce weight and avoid the bogie Other parts.
The bogie according to claim 8, further comprising a sealing ring;

The end cap main body is provided with a closed-shaped sealing ring installation groove connected end to end at a position on the periphery of the end cap shaft hole;

The sealing ring is placed in the sealing ring installation groove to realize the seal between the end cover main body and the wheelset axle box.
The bogie according to claim 9, wherein the motor housing is a cylindrical motor housing; the shaft hole of the end cover is located in the middle of the motor end cover.
The bogie according to claim 10, wherein the sealing ring installation groove is an annular sealing ring installation groove;

The card slot is a ring-shaped card slot, and the buckle is a ring-shaped buckle.
The bogie according to claim 11, wherein the two wheels fixed on the same axle are symmetrically arranged;

The bearing for the axle box is a rolling bearing.
The bogie according to claim 12, characterized in that there is an interference fit between the wheel and the axle;

There is an interference fit between the inner ring of the axle box bearing and the axle;

There is an interference fit between the rotor and the axle.
The bogie according to claim 13, further comprising a frame and a series of suspension devices; the frame comprises:

Two side beams arranged in parallel, the side beams including two primary mounting parts and a connecting part connecting the two primary mounting parts; the connecting parts of the two side beams are recessed toward each other in a transverse direction;

Cross beam, connecting the connecting parts of the two side beams;

Wherein, the first suspension device is installed on the wheelset axle box, the first installation part of the side beam is located on the first suspension device, and the frame is located on the two wheelsets Above.
The bogie according to claim 14, further comprising two secondary air springs;

The frame also includes two secondary mounting seats, the two secondary mounting seats are respectively fixed on the outside of the middle position of the connecting portion of the two side beams, and protrude from the two side beams in the transverse direction. end;

Wherein, the two secondary air springs are installed on the two secondary mounting seats.
The bogie according to claim 15, further comprising a tread braking device;

The frame also includes a brake device mounting seat, and two brake device mounting seats are fixed at the bottom of the middle position of the connecting portion of each side beam, and the two brake device mounting seats are respectively located on the two Tie both sides of the mounting seat;

Wherein, the tread brake device is installed at the brake device mounting seat.
The bogie according to claim 16, wherein the primary suspension device includes a primary spring;

The outer top of the wheelset axle box is provided with two axle box primary installation interfaces at intervals along the longitudinal direction;

The inner top of the primary installation portion of the side beam is provided with two side beam primary installation interfaces at intervals along the longitudinal direction;

Every two of the primary springs are respectively installed with two axle box primary mounting interfaces of the same wheelset axle box, and the two side beams of the primary mounting portion are located on the two primary springs. Above.
The bogie according to claim 17, wherein the bottom of the connecting part of the side beam is provided with two longitudinal mounting seats at the side beam;

The wheel set axle box is provided with a longitudinal mounting seat at the axle box;

The bogie also includes a side longitudinal link, both ends of the side longitudinal link are respectively connected to the longitudinal mounting seat at the axle box and the longitudinal mounting seat at the side beam to realize the wheel set axle box The longitudinal connection with the frame.
The bogie according to claim 18, wherein the end of the side beam has a downward bending part;

The wheelset axle box is provided with a vertical mounting seat at the axle box;

The bogie also includes a vertical hoist. The upper end and the lower end of the vertical hoist are respectively connected to the inner side of the bending part and the vertical mounting seat at the axle box, so as to realize the axle box and the axle box. The vertical connection of the frame.
The bogie according to claim 19, wherein there are two cross beams, the two cross beams are parallel to each other, and each of the cross beams is provided with a longitudinal mounting seat at the cross beam;

The motor housing of the permanent magnet direct drive motor is provided with a longitudinal mounting seat at the motor;

The bogie also includes a middle longitudinal link; both ends of the middle longitudinal link are respectively connected to the longitudinal mounting seat at the beam and the longitudinal mounting seat at the motor to realize the permanent magnet direct drive motor and the The vertical connection of the framework.
The bogie according to claim 20, further comprising a traction device and a transverse shock absorber; the traction device is installed between the two beams, and the traction device is provided on both sides of the traction device. Lateral shock absorber seat;

Wherein, the intermediate position of the connecting portion is provided with a transverse shock absorber seat at the connecting portion, and both ends of the transverse shock absorber are respectively connected to the transverse shock absorber seat at the traction device and the transverse shock absorber seat at the connecting portion. A device seat to realize the damping of the traction device in the transverse direction.
The bogie according to claim 21, wherein the two ends of the longitudinal connecting rod are respectively provided with rubber nodes, which are installed by bolts and cylindrical nuts;

Wherein, the longitudinal link includes the middle longitudinal link and the side longitudinal link.
The bogie according to claim 22, wherein the distance between the two axles of the bogie is 1600 mm.
A rail vehicle, characterized by comprising the bogie according to any one of claims 1 to 23.