CN111994109B

CN111994109B - Bogie and rail vehicle

Info

Publication number: CN111994109B
Application number: CN202010800820.4A
Authority: CN
Inventors: 王伟; 黄雪飞; 兰琪; 何天; 李娜; 张丽博; 李淑华; 杨林; 郑建科
Original assignee: CRRC Tangshan Co Ltd
Current assignee: CRRC Tangshan Co Ltd
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2021-07-27
Anticipated expiration: 2040-08-11
Also published as: CN111994109A; WO2022032806A1

Abstract

The embodiment of the application provides a bogie and a railway vehicle. The bogie comprises a wheel set, a wheel set axle box, a direct drive motor and a motor axle box, wherein the wheel set comprises an axle and two wheels fixed on the peripheral surface of the axle; the direct drive motor is positioned between the two wheels; the motor shaft box is positioned between the direct drive motor and the wheel; the rotor of the direct drive motor is fixedly connected with the inner ring of the motor bearing to drive the axle, and the stator of the direct drive motor is fixedly connected with the outer ring of the motor bearing. This application adopts the setting directly to drive the axletree at the epaxial motor of driving and rotates to save the gear drive mechanism between motor and the axletree among the correlation technique, reduced the noise when the bogie uses, be favorable to improving passenger's experience by bus.

Description

Bogie and rail vehicle

Technical Field

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

Background

The bogie is arranged between the car body and the rail and is one of the most important parts on the rail car. The main functions of the bogie are as follows: the supporting vehicle body is used for bearing and transmitting various loads and acting forces from the vehicle body to wheels or from wheel tracks to the vehicle body; the safe operation of the vehicle is ensured, and the vehicle can flexibly operate along a straight line and smoothly pass through a curve; the interaction between the vehicle and the wheel rail is alleviated, the vibration and the impact are reduced, and the running stability and the safety of the vehicle are improved. According to the unpowered device, the bogie can be divided into a power bogie and a non-power bogie.

In the related art, the power device on the power bogie generally adopts a combination structure of a traction motor and a gear transmission mechanism, an output end of the traction motor is connected with the gear transmission mechanism, and a terminal gear of the gear transmission mechanism is sleeved on an axle so as to apply the driving force of the traction motor on the axle to drive wheels to rotate.

However, with the solutions in the related art, the gear transmission mechanism generates noise during operation, which causes the bogie to have high noise and large power loss during transmission.

Disclosure of Invention

The embodiment of the application provides a bogie and a railway vehicle, which are mainly used for solving the problems of high noise and large power loss of the bogie in the related technology.

According to a first aspect of embodiments of the present application, there is provided a bogie including:

the wheel set comprises an axle and two wheels fixed on the peripheral surface of the axle, and the axle protrudes out of the two wheels;

the wheel-set axle box is arranged at two ends of the axle and comprises a wheel-set axle box bearing and a wheel-set axle box body, the inner ring of the wheel-set axle box bearing is fixed on the outer peripheral surface of the axle, and the outer ring of the wheel-set axle box bearing is fixed with the wheel-set axle box body;

the direct drive motor is positioned between the two wheels;

the motor shaft box is positioned between the direct drive motor and the wheel and comprises a motor bearing and a motor shaft box body, the inner ring of the motor bearing is fixed on the peripheral surface of the axle, and the outer ring of the motor bearing is fixed with the motor shaft box body;

the rotor of the direct drive motor is fixedly connected with the inner ring of the motor bearing to drive the axle, and the stator of the direct drive motor is fixedly connected with the outer ring of the motor bearing.

According to a second aspect of an embodiment of the present application, there is provided a rail vehicle comprising a vehicle body and a bogie as described above, the vehicle body being disposed on the bogie.

The bogie comprises a wheel set, wheel set axle boxes, a direct drive motor and a motor axle box, wherein the wheel set comprises an axle and two wheels fixed on the peripheral surface of the axle; the direct drive motor is positioned between the two wheels; the motor shaft box is positioned between the direct drive motor and the wheel and comprises a motor bearing and a motor shaft box body, the inner ring of the motor bearing is fixed on the peripheral surface of the axle, and the outer ring of the motor bearing is fixed with the motor shaft box body; the rotor of the direct drive motor is fixedly connected with the inner ring of the motor bearing to drive the axle, and the stator of the direct drive motor is fixedly connected with the outer ring of the motor bearing. According to the bogie, the direct drive motor arranged on the axle is adopted to directly drive the axle to rotate, so that a gear transmission mechanism between the motor and the axle in the related technology is omitted, the noise of the bogie in use is reduced, and the riding experience of passengers is improved; the direct drive motor is adopted for driving, so that the loss of motor power can be reduced, and the transmission efficiency is improved; the maintenance frequency is reduced, and the maintenance cost is reduced. In addition, the wheel-set axle boxes are arranged on the outer side of the wheels, so that the space on the inner side of the frame is saved, and other parts can be conveniently installed.

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 schematic illustration of a bogie according to an embodiment of the present application;

shown in FIG. 2 is a side view of FIG. 1;

shown in fig. 3 is a bottom view of fig. 1;

fig. 4 is a schematic view of a connection structure of a wheel pair and a driving device provided by an embodiment of the application;

FIG. 5 is a schematic view of a motor shaft housing and end cap connection configuration provided by an embodiment of the present application;

FIG. 6 is a simplified structural diagram of an end cap according to an embodiment of the present application;

FIG. 7 illustrates a front view of an end cap provided by an embodiment of the present application;

shown in FIG. 8 is a cross-sectional view A-A of FIG. 7;

FIG. 9 illustrates a simplified schematic diagram of a motor shaft housing from a first perspective provided by an exemplary embodiment of the present application;

FIG. 10 illustrates a simplified schematic diagram of a motor shaft housing from a second perspective in accordance with an exemplary embodiment of the present application;

FIG. 11 illustrates a top view of a motor shaft housing provided in accordance with an embodiment of the present application;

shown in FIG. 12 is a cross-sectional view B-B of FIG. 11;

FIG. 13 is a simplified structural diagram of a framework provided by an embodiment of the present application;

FIG. 14 is a schematic illustration of a side sill provided in accordance with an embodiment of the present application;

FIG. 15 is a simplified structural diagram of a beam according to an embodiment of the present application;

FIG. 16 is a schematic view of a side rail to cross rail connection configuration provided by an embodiment of the present application;

fig. 17 is a schematic structural diagram of a wheel-pair axle box according to an embodiment of the present application.

Reference numerals:

10-wheel pair; 11-axle; 12-a wheel; 13-wheel-pair axle boxes; 131-a spring support seat;

20-a framework; 21-side beam; 211-a first hinge; 2111-hinge pin seat; 2112-pressing sleeve; 2113-a positioning ring; 2114-hinged end cap; 212-a spring mount; 213-brake caliper mount; 214-transverse damper seat; 215-anti-roll torsion bar mount; 216-secondary spring mount; 22-a cross beam; 221-sub-beams; 2211-traction pull rod mounting base; 22111-traction link node mounting base; 22112-triangle rubber node mounting base; 222-a support beam; 2221-lateral bumper mount; 223-connecting beams; 2231-a tie beam body; 2232-a first connecting portion; 2233-a second connecting portion; 2234-a second hinge; 22341-hinge pins; 22342-center bolt;

31-a direct drive motor; 311-a housing; 3111-a stator; 3112-end cover; 31121-end cap body; 31122-a first boss; 31123-a second boss; 31124-first connection plate; 32-motor shaft housing; 321-motor axle box body; 322-a second connecting plate; 323-a positioning platform; 324-a base; 325-positioning round table; 326-a second reinforcing rib; 327-a first reinforcing bar;

40-a spring;

a 50-secondary spring;

60-a traction device.

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 schematic illustration of a bogie according to an embodiment of the present application; shown in FIG. 2 is a side view of FIG. 1; shown in fig. 3 is a bottom view of fig. 1; please refer to fig. 1-3.

The present embodiment provides a bogie comprising at least two wheel sets 10, a frame 20, a primary spring 40, a secondary spring 50 and a traction device 60.

Wherein the wheelsets 10 are arranged below the frame 20 for contacting the rail. The number of wheel pairs 10 can be set as desired, and can be, for example, two, three, etc. Each wheel pair 10 comprises an axle 11 and two wheels 12 fixed on the outer peripheral surface of the axle 11, the wheels 12 are direct parts of the bogie contacting with the track, and the axle 11 is used for transmitting the power of a driving device to the wheels 12 so as to drive the wheels 12 to move along the track. The axle 11 protrudes beyond the two wheels 12, and wheelset axle boxes 13 are connected to both ends of the axle 11. The wheel-set axle box 13 includes a wheel-set axle box bearing and a wheel-set axle box body, an inner race of the wheel-set axle box bearing is fixed to an outer peripheral surface of the axle, and an outer race of the wheel-set axle box bearing is fixed to the wheel-set axle box body. In this embodiment, the axle 11 may be a hollow axle, so as to reduce the weight of the bogie on the premise of satisfying the strength.

The frame 20 is the main load-bearing structure of the bogie and is used for mounting other parts on the bogie. The frame 20 includes two side members 21 disposed opposite to each other and a cross member 22 connecting the two side members 21, and the side members 21 are perpendicular to the axles 11 and connected to the wheel-set axle boxes 13 at the same end of the two axles 11.

Specifically, the cross member 22 includes a main body portion for connecting the traction device and a connecting portion for hinging with the side member 21, the connecting portion is provided at both ends of the main body portion, and the width of the connecting portion is gradually reduced in a direction away from the main body portion; the end of the connecting portion facing away from the main body portion is movably connected to the side member 21.

Through the arrangement, the side beams 21 are connected with the cross beams 22 in a hinged mode, the rotational freedom degree is completely released, and the side beams 21 and the wheel pairs have good follow-up performance. This embodiment has realized framework 20's flexibility, and framework 20 self also can undertake the orbit distortion volume of partly, reduces the amount of deflection change that the orbit distortion brought for the bogie all has good adaptability on straight circuit and curve, is favorable to improving passenger's comfort level. The width of the connecting portion is gradually reduced so that a gap can be formed between the connecting portion and the side member 21, and the gap can ensure that the cross member 22 can have a greater amount of rotation relative to the side member 21, avoiding collision of the cross member 22 with the side member 21. In addition, the space in the partial gap can be fully utilized to arrange other parts (such as a brake clamp hanging seat and the like) on the bogie.

The driving device is used for providing power for the bogie, in the embodiment, the driving device can be a direct drive motor 31, the direct drive motor 31 is arranged on the axle 11 and located between the two wheels 12, and the direct drive motor 31 is used for directly driving the axle 11 to rotate, so that a middle transmission structure can be omitted.

The driving device further comprises motor axle boxes 32 arranged on two sides of the direct drive motor 31, the motor axle boxes 32 are located between the direct drive motor 31 and the corresponding wheels 12, and the motor axle boxes 32 are used for providing support for the direct drive motor so that the direct drive motor 31 can be fixed on the axle 11. The motor shaft housing 32 includes a motor bearing and a motor shaft housing body 321, an inner race of the motor bearing is fixed to an outer circumferential surface of the axle 11, and an outer race of the motor bearing is fixed to the motor shaft housing body 321. The rotor of the direct drive motor 31 is fixedly connected with the inner ring of the motor bearing to drive the axle 11, and the stator of the direct drive motor 31 is fixedly connected with the outer ring of the motor bearing.

A series of springs 40 are mounted between the wheelset axle boxes 13 and the side rails 21 of the frame 20; the secondary spring 50 is installed between the side member 21 of the frame 20 and the vehicle body; a traction device 60 is mounted on the cross member 22 for connection to the vehicle body for transferring loads.

In the embodiment, the direct drive motor 31 arranged on the axle 11 is adopted to directly drive the axle 11 to rotate, so that a gear transmission mechanism between the motor and the axle in the related technology is omitted, the noise of the bogie during use is reduced, and the riding experience of passengers is improved. The direct drive motor 31 is adopted for driving, and intermediate transmission mitigation is omitted, so that the loss of motor power can be reduced, and the transmission efficiency is improved. Compared with a gear transmission structure, the direct drive motor 31 can reduce maintenance frequency and maintenance cost. Furthermore, locating the wheelset axleboxes 13 outboard of the wheels 12 facilitates saving space inboard of the frame 20 for mounting other components.

Fig. 4 is a schematic view of a connection structure of a wheel pair and a driving device provided by an embodiment of the application; please continue to refer to fig. 4. In this embodiment, the outer shape of the housing 311 may be set as needed, and may be, for example, a cylindrical shape or a prismatic shape. The housing 311 is fitted over the axle 11, a rotor (not shown) and a stator 3111 are provided in the housing 311, the stator 3111 is provided on the housing 311, and the rotor is provided on the axle 11. When the direct drive motor 31 is powered on, a magnetic force is generated between the stator 3111 and the rotor to drive the rotor to rotate, so that the axle 11 rotates along with the rotor, and the wheel 12 is driven.

FIG. 5 is a schematic view of a motor shaft housing and end cap connection configuration provided by an embodiment of the present application; please continue to refer to fig. 5. In this embodiment, both ends of the housing 311 are provided with end covers 3112, and the end covers 3112 have end cover shaft holes for the axle 11 to pass through. Two end covers 3112 are fixed at two ends of the housing 311, the axle 11 passes through two end cover shaft holes and the hollow part of the housing 311, and one end of the end cover 3112 departing from the housing 311 is fixed to the motor axle box body, so that the stator 3111 is fixedly connected to the outer ring of the motor bearing. That is, the motor shaft housing 32 is disposed on the axle 11 through a motor bearing, and one end of the motor shaft housing 32 is further connected to the end cover 3112 of the housing 311, and the housing 311 is supported by the motor shaft housing 32 disposed on both sides of the housing 311, so that the stator 3111 and the rotor in the housing 311 can be separated from each other by a gap in which the axle 11 can rotate to transmit power.

FIG. 6 is a simplified structural diagram of an end cap according to an embodiment of the present application; FIG. 7 illustrates a front view of an end cap provided by an embodiment of the present application; shown in FIG. 8 is a cross-sectional view A-A of FIG. 7; FIG. 9 illustrates a simplified schematic diagram of a motor shaft housing from a first perspective provided by an exemplary embodiment of the present application; FIG. 10 illustrates a simplified schematic diagram of a motor shaft housing from a second perspective in accordance with an exemplary embodiment of the present application; FIG. 11 illustrates a top view of a motor shaft housing provided in accordance with an embodiment of the present application; shown in FIG. 12 is a cross-sectional view B-B of FIG. 11; please refer to fig. 6-12.

Optionally, the end cover 3112 of this embodiment includes an end cover 31121, one end of the end cover 31121 facing the housing 311 is provided with a first boss 31122 for connecting the housing 311, two end surfaces of the housing 311 are respectively provided with a clamping groove, and the two end covers 3112 and the housing 311 are installed in a clamping fit manner through the first boss 31122 and the clamping groove.

The end cover body 31121 has an end cover body threaded hole, the housing 311 has a housing threaded hole matched with the end cover body threaded hole, and the bolt sequentially passes through the end cover body threaded hole and the housing threaded hole to realize the fixed connection of the end cover 3112 and the housing 311.

A second boss 31123 is provided at one end of the end cover body 31121 facing away from the housing 311, and a first connection plate 31124 for connecting the motor shaft housing 32 is provided on the outer peripheral side of the second boss 31123.

The motor shaft housing 32 includes a motor shaft housing body 321, one end of the motor shaft housing body 321 facing the end cover 3112 is provided with a second connecting plate 322 for connecting the end cover 3112, and the motor shaft housing 32 and the end cover 3112 are fixed by the connection of the first connecting plate 31124 and the second connecting plate 322.

In an optional embodiment, a plurality of first fixing holes are formed on the first connecting plate 31124, a plurality of second fixing holes are formed on the second connecting plate 322, the plurality of first fixing holes correspond to the plurality of second fixing holes one to one, and the fasteners sequentially penetrate through the first fixing holes and the second fixing holes to fixedly connect the first connecting plate 31124 and the second connecting plate 322.

One side of the motor axle box body 321 facing the direct drive motor 31 is provided with an annular butt joint groove; the part of the second boss 31123 protruding from the first connection plate 31124 serves as an alignment boss; the alignment protrusion and the alignment groove are in butt joint to realize alignment of the end cover 3112 and the motor shaft box body 321.

FIG. 13 is a simplified structural diagram of a framework provided by an embodiment of the present application; FIG. 14 is a schematic illustration of a side sill provided in accordance with an embodiment of the present application; FIG. 15 is a simplified structural diagram of a beam according to an embodiment of the present application; please refer to fig. 13-15.

Optionally, in this embodiment, both ends of the cross beam 22 are movably connected to the two side beams 21, respectively, that is, a certain displacement may be generated between the cross beam 22 and the side beams 21 in any direction, so that the frame 20 becomes a flexible frame, and the frame 20 itself also bears a part of the twisting amount, thereby reducing the change of the deflection of the series of springs 40 caused by the rail twisting. That is, the present embodiment can make the vehicle body more suitable for a curved road by changing the angles of the cross member 22 and the side member 21 in the horizontal direction; the vehicle body is more suitable for the concave-convex rail surface through the change of the cross beam 22 and the side beam 21 in the vertical direction; the bogie is ensured to have certain flexibility, the influence caused by the distortion of the track is alleviated, and the stability of the vehicle body is favorably maintained.

Optionally, in this embodiment, the middle of the side beam 21 is provided with a first hinge 211, the two ends of the cross beam 22 are provided with second hinges 2234, and the side beam 21 and the cross beam 22 are hinged by the first hinge 211 and the second hinges 2234.

Specifically, fig. 16 is a schematic view of a connection structure of a side beam and a cross beam according to an embodiment of the present application; please refer to fig. 16. In this embodiment, the first hinge portion 211 includes a hinge pin seat 2111 disposed in the side beam 21, a cavity is formed in the hinge pin seat 2111, a pressing sleeve 2112, a positioning ring 2113 and a hinge end cover 2114 are disposed in the cavity, the positioning ring 2113 is located at a side away from the cross beam 22, one end of the pressing sleeve 2112 close to the cross beam 22 abuts against an inner wall of the cavity, the positioning ring 2113 presses the end of the pressing sleeve 2112 away from the cross beam 22 through a fastener, and the positioning ring 2113 is sleeved on an outer side of the hinge end cover 2114. The pressing sleeve 2112 can be a rubber sleeve to better adapt to deformation.

The second hinge portion 2234 includes a hinge pin 22341 and a center bolt 22342, the hinge pin 22341 is inserted into the pressing sleeve 2112 and abuts against the hinge end cap 2114, and the center bolt 222342 is fixed in the hinge pin 22341 after passing through the hinge end cap 2114, so that the first hinge portion 211 and the second hinge portion 2234 are hinge-connected.

Through the scheme, the side beams 21 are connected with the cross beams 22 in a hinged mode, the rotational freedom degree is completely released, and the side beams 21 and the wheel pair 10 have good follow-up performance. This embodiment has realized framework 20's flexibility, and framework 20 self also can undertake the orbit distortion volume of partly, reduces the amount of deflection change that the orbit distortion brought for the bogie all has good adaptability on straight circuit and curve, is favorable to improving passenger's comfort level.

In this embodiment, the main body portion of the cross beam 22 includes two sub-cross beams 221 disposed oppositely and two support beams 222 disposed between the two sub-cross beams 221, and the connecting portion includes two connecting beams 223 respectively connecting two ends of the two sub-cross beams 221.

The connecting beam 223 includes a connecting beam main body 2231, a first connecting portion 2232 and a second connecting portion 2233 for connecting the two sub-beams are arranged at one end of the connecting beam main body 2231 facing the sub-beams, the first connecting portion 2232 and the second connecting portion 2233 intersect, a gap is formed between each of the first connecting portion 2232 and the second connecting portion 2233 and the side beam 21, and a second hinge portion 2234 is arranged at one end of the connecting beam main body 2231 facing away from the sub-beams. In this embodiment, the connecting beam main body 2231, the first connecting portion 2232 and the second connecting portion 2233 form a substantially isosceles triangle structure, and the gap between the first connecting portion 2232 and the second connecting portion 2233 and the side beam 21 can ensure that the cross beam 22 can have a larger rotation amount relative to the side beam 21, thereby preventing the cross beam 22 from colliding with the side beam 21. In addition, the space in the partial gap can be fully utilized to arrange other parts (such as a brake clamp hanging seat and the like) on the bogie.

In the present embodiment, both ends of the cross member 22 are hinged to the side members 21, so that the cross member 22 can have a larger displacement amount with respect to the side members 21, and the degree of flexibility of the frame 20 is improved. The beam frame constituted by the two sub-beams 221 and the two support beams 222 ensures the strength of the beam 22 itself.

Further, two supporting beams 222 are respectively provided with a transverse buffer mounting seat 2221, the transverse buffer mounting seats 2221 are arranged on one side of one supporting beam 222 facing the other supporting beam 222, the two transverse buffer mounting seats 2221 are oppositely arranged, two ends of each transverse buffer are respectively connected to the two transverse buffer mounting seats 2221, transverse movement limiting of the bogie can be achieved by arranging the transverse buffers on the transverse buffer mounting seats 2221, and the effects of buffering and damping transverse swinging of rubber are achieved, so that the installation and operation of the vehicle are ensured.

Optionally, the two sub-beams 221 are respectively provided with a traction pull rod mounting seat 2211, the traction pull rod mounting seats 2211 include a traction pull rod node mounting seat 22111 and a triangle rubber node mounting seat 22112 for connecting a direct drive motor, and the traction pull rod node mounting seats 22111 and the triangle rubber node mounting seats 22112 are integrally formed, so that the direct drive motor 31 is connected with the framework 20, the traction pull rod is connected with the framework 20, the transmission of traction force and driving force is ensured, and the provision and transmission of vehicle operation power are realized. One end of the traction pull rod is connected to the traction pull rod node mounting seat 22111, and the other end of the traction pull rod is connected to the traction device 60 on the framework 20; one end of the connecting pull rod is connected to the triangle rubber node mounting seat 22112, and the other end of the connecting pull rod is connected to the shell 311 of the direct drive motor 31.

FIG. 17 illustrates a schematic diagram of a wheel-pair axle box according to an embodiment of the present application; please refer to fig. 1 and 17. Further, two primary spring mounting seats 212 are arranged at two ends of the side beam 21 of the present embodiment, and the two primary spring mounting seats 212 are arranged at intervals; both ends of the wheel-set axle box 13 are connected to a spring mounting seat 212 through a spring 40, two sides of the wheel-set axle box 13 are respectively provided with a spring supporting seat 131, the lower end of the spring 40 is mounted on the spring supporting seat 131, and the upper end of the spring 40 is connected to the spring mounting seat 212. A series of springs 40 provide attachment and positioning between the frame 20 and the wheel-set 10, allowing the frame 20 to dampen vertical vibrations caused by road irregularities. In this embodiment, a series of springs 40 may be selected from a steel spring, a rubber stack spring, or a combination of a steel spring and a rubber spring.

The side beam 21 further comprises two brake caliper mount bases 213 located on either side of the first hinge portion 211, the brake caliper mount bases 213 being disposed on the side of the side beam 21 facing the cross beam 22. The brake caliper mount 213 is used to mount a brake caliper for tread braking, and the brake caliper mount 213 is disposed inside between the two wheel pairs 10, so that the installation space can be fully utilized, and the installation space utilization degree of the frame 20 can be improved.

The side beam 21 further includes a transverse damper seat 214 disposed below the first hinge 211, the transverse damper seat 214 being located on the same side of the side beam 21 as the series of spring mounts 212. The transverse damper seat 214 is used for mounting a transverse damper on the traction device, one end of the transverse damper is connected with the transverse damper seat 214, and the other end of the transverse damper is connected with the traction device 60 on the framework 20, so that transverse vibration caused by track unevenness or curvilinear motion in the running process of the vehicle is relieved.

The side beam 21 further includes an anti-roll torsion bar mount 215, the anti-roll torsion bar mount 215 and a series of spring mounts 212 being located on the same side of the side beam 21 and being located adjacent to the transverse damper mount 214. The anti-roll torsion bar mounting seat 215 is used for mounting an anti-roll torsion bar, and two ends of the anti-roll torsion bar are respectively connected to the anti-roll torsion bar mounting seats 215 on the two side beams 21, so that shaking between a vehicle and a bogie is prevented, and the running safety of the vehicle is ensured.

The side member 21 further includes a secondary spring mount 216 disposed above the first hinge portion 211, the secondary spring mount 216 being disposed on the side member 21 opposite the primary spring mount 212. The secondary spring 50 is installed on the secondary spring installation seat 216 and connected with the vehicle body, the secondary spring 50 can further relieve the vibration of the wheel set 10, the vibration of the vehicle body is reduced through two-stage relieving, and the comfort of passengers is ensured. The secondary spring 50 may be selected to be an air spring.

Referring to fig. 6 to 12, the motor axle housing 32 of the present embodiment further includes a positioning platform 323 and a base 324 disposed on an outer peripheral side of the motor axle housing body 321, the positioning platform 323 and the base 324 are disposed opposite to each other, the positioning platform 323 is used for mounting and positioning the motor axle housing 32, and the base 324 is used for providing a support when the motor axle housing 32 is placed.

The base 324 includes an annular protrusion disposed on an outer circumferential side of the motor shaft housing body 321, and the annular protrusion can play a role of supporting well, and can reduce the weight of the motor shaft housing body 321 due to its hollow interior.

The motor shaft housing 32 further includes a reinforcing rib disposed on the outer periphery of the motor shaft housing body 321 and located between the positioning platform 323 and the base 324, and the reinforcing rib enables the motor shaft housing body 321 to have a thinner wall thickness, thereby reducing the weight of the motor shaft housing body 321. The motor shaft box body 321 can be ensured to have good strength by arranging the reinforcing ribs, and the lightweight of the motor shaft box 32 is facilitated.

The reinforcing ribs include a plurality of first reinforcing ribs 327 positioned at the middle portion of the motor shaft housing body 321, and the plurality of first reinforcing ribs 327 are spaced apart from each other. The first reinforcing ribs 327 may be distributed on the motor shaft housing body 321 in a protruding manner.

The reinforcing ribs further comprise second reinforcing ribs 326 positioned on one side, away from the direct drive motor 31, of the motor axle box body 321, and the length of the second reinforcing ribs 326 in the direction of the axle 11 is smaller than the length of the first reinforcing ribs 327 in the direction of the axle 11. The second reinforcing ribs 326 mainly serve to reinforce the strength of the end portions to prevent the local strength from being too low.

The motor shaft box body 321 is internally provided with a positioning round platform 325 for fixing a motor bearing, the inner diameter of the positioning round platform 325 is smaller than the outer diameter of the motor bearing, one end of the motor bearing, which deviates from the direct drive motor 31, is abutted against the positioning round platform 325, one side of the motor bearing, which faces the direct drive motor 31, is abutted against the end cover 3112, and the positioning round platform 325 can limit the displacement of the motor bearing so as to keep the motor bearing stable.

The outer ring of the motor bearing is in threaded connection with the motor axle box body 321, the inner ring of the motor bearing is in interference connection with the axle 11, and the axle 11 can drive the inner ring of the motor bearing to rotate relative to the outer ring of the motor bearing through balls arranged between the outer ring and the inner ring of the motor bearing.

Example two

The present embodiment provides a railway vehicle, comprising a vehicle body and a bogie as described in the first embodiment above, the vehicle body being disposed on the bogie.

The railway vehicle of the embodiment adopts the bogie of the first embodiment, so that the noise is low, and the riding experience of passengers is improved.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically connected, electrically connected or can communicate with each other; 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.

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, comprising:

the wheel set comprises an axle and two wheels fixed on the peripheral surface of the axle;

the direct drive motor is positioned between the two wheels;

the rotor of the direct drive motor is fixed with the inner ring of the motor bearing through a connecting piece to drive the axle, and the stator of the direct drive motor is fixed with the outer ring of the motor bearing through a connecting piece;

the outer peripheral side of the motor axle box body is provided with a positioning platform and a base, and the positioning platform and the base are arranged oppositely; the positioning platform is used for installing other parts, and the base is used for providing support when the motor shaft box is placed.

2. The bogie as recited in claim 1, wherein the direct drive motor further comprises:

a housing, the rotor and the stator being disposed within the housing, the housing being fixed with the stator;

the end covers are provided with end cover shaft holes which penetrate through, the end covers are fixed at two ends of the shell, the axle passes through the two end cover shaft holes and the hollow part of the shell, one end of the end cover deviates from the shell, and the motor axle box body is fixed, so that the stator is fixedly connected with the outer ring of the motor bearing.

3. The truck of claim 2, wherein the end cap comprises:

the end cover comprises an end cover body, wherein one end of the end cover body facing the shell is provided with a first boss used for being connected with the shell;

two end faces of the shell are respectively provided with a clamping groove, and the two end covers and the shell are installed in a clamping and matching mode through the first bosses and the clamping grooves;

the end cover body is provided with an end cover body threaded hole, the shell is provided with a shell threaded hole matched with the end cover body threaded hole, and a bolt sequentially penetrates through the end cover body threaded hole and the shell threaded hole to realize the fixed connection of the end cover and the shell.

4. The bogie according to claim 3, wherein one end of the end cover body facing away from the shell is provided with a second boss, and the outer peripheral side of the second boss is provided with a first connecting plate for connecting the motor shaft box;

the motor shaft box body is provided with a first connecting plate used for connecting the end cover, and the end cover is connected with the motor shaft box body through the first connecting plate.

5. The bogie of claim 4, wherein the first connecting plate is provided with a plurality of first fixing holes, the second connecting plate is provided with a plurality of second fixing holes, the plurality of first fixing holes correspond to the plurality of second fixing holes one to one, and fasteners sequentially penetrate through the first fixing holes and the second fixing holes to fixedly connect the first connecting plate and the second connecting plate.

6. The bogie as recited in claim 4, wherein one side of the motor axle box body facing the direct drive motor is provided with an annular butt groove;

the part of the second boss protruding out of the first connecting plate is used as an alignment boss;

the alignment protrusion and the butt joint groove are in butt joint to achieve alignment of the end cover and the motor axle box body.

7. The bogie according to any one of claims 1 to 6, further comprising a frame including two oppositely disposed side beams and a cross beam connecting the two side beams, wherein the side beams are perpendicular to the axle and connected to the wheelset axlebox, and two ends of the cross beam are movably connected to the two side beams respectively.

8. The bogie of claim 7, wherein the side beam is provided with a first hinge at a middle portion thereof and a second hinge at both ends thereof, and the side beam is hingedly connected to the cross beam via the first and second hinges.

9. The bogie according to claim 8, wherein the first hinge part comprises a hinge pin seat arranged in the side beam, a cavity is formed in the hinge pin seat, a pressing sleeve, a positioning ring and a hinge end cover are arranged in the cavity, the positioning ring is positioned on one side far away from the cross beam, one end of the pressing sleeve close to the cross beam abuts against the inner wall of the cavity, the positioning ring presses one end of the pressing sleeve far away from the cross beam through a fastener, and the positioning ring is sleeved on the outer side of the hinge end cover;

the second hinge part comprises a hinge pin and a central bolt, the hinge pin penetrates through the pressure sleeve and is abutted against the hinge end cover, and the central bolt penetrates through the hinge end cover and then is fixed in the hinge pin.

10. The bogie according to claim 8, wherein the cross member comprises two sub cross members disposed oppositely, two support beams disposed between the two sub cross members, and two connecting beams respectively connecting both ends of the two sub cross members;

the connecting beam comprises a connecting beam main body, a first connecting portion and a second connecting portion which are used for connecting the two sub-beams are arranged at one end, facing the sub-beams, of the connecting beam main body, the first connecting portion and the second connecting portion are intersected, gaps are formed between the first connecting portion and the second connecting portion and the side beams, and a second hinged portion is arranged at one end, facing away from the sub-beams, of the connecting beam main body.

11. The bogie according to claim 10, wherein a lateral bumper mount is provided on each of the two support beams, the lateral bumper mount being provided on a side of the support beam facing the other support beam, the two lateral bumper mounts being disposed opposite to each other;

two ends of the transverse buffer are respectively connected to the two transverse buffer mounting seats.

12. The bogie according to claim 11, wherein a traction pull rod mounting seat is arranged on each of the two sub-beams, the traction pull rod mounting seats comprise a traction pull rod node mounting seat and a triangle rubber node mounting seat, and the traction pull rod node mounting seats and the triangle rubber node mounting seats are integrally formed;

the bogie further comprises a traction pull rod, a connecting pull rod and a traction device; the traction device is positioned in a frame-shaped space enclosed by the sub-beams and the support beams;

one end of the traction pull rod is connected to the traction pull rod node mounting seat through a rubber node, and the other end of the traction pull rod is connected to the traction device on the framework through a rubber node; one end of the connecting pull rod is connected to the triangular plate rubber node mounting base, and the other end of the connecting pull rod is connected to the shell of the direct drive motor.

13. The bogie of claim 8, wherein two primary spring mounts are provided at each end of the side beam, the two primary spring mounts being spaced apart;

the bogie further comprises a series of springs, and the series of springs are installed between two ends of the wheel-set axle box and the series of spring installation seats.

14. The truck of claim 13 wherein the side beam further includes two brake caliper mounts on either side of the first hinge, the brake caliper mounts being disposed on a side of the side beam facing the cross beam;

the bogie further comprises a brake caliper for providing braking, the brake caliper being mounted on the brake caliper mount.

15. The truck of claim 14 wherein said side beam further includes a transverse damper seat disposed below said first hinge, said transverse damper seat being located on the same side of said side beam as said series of spring-mounted seats;

the bogie further comprises a transverse shock absorber, one end of the transverse shock absorber is connected with the transverse shock absorber seat, and the other end of the transverse shock absorber is connected with the traction device on the framework.

16. The truck of claim 15 wherein said side beam further includes a roll bar mount located on the same side of said side beam as said series of spring mounts and disposed proximate said transverse damper mount;

the bogie further comprises an anti-rolling torsion bar, and two ends of the anti-rolling torsion bar are respectively connected to the anti-rolling torsion bar mounting seats on the two side beams.

17. The truck of claim 16 wherein the side sill further includes a secondary spring mount disposed above the first hinge, the secondary spring mount being disposed on an opposite side of the side sill from the primary spring mount;

the bogie further comprises a secondary spring, one end of the secondary spring is connected to the secondary spring mounting seat, and the other end of the secondary spring is used for connecting a vehicle body.

18. The bogie of claim 1, wherein the base includes an annular projection disposed on an outer peripheral side of the motor axle housing body.

19. The bogie of claim 18, wherein the outer periphery of the motor axle housing body is further provided with a reinforcing rib, and the reinforcing rib is positioned between the positioning platform and the base.

20. The bogie of claim 19, wherein the reinforcing rib comprises a plurality of first reinforcing ribs positioned in a central portion of the motor shaft housing body, the plurality of first reinforcing ribs being spaced apart from one another.

21. The bogie of claim 20, wherein the reinforcing rib further comprises a second reinforcing rib positioned on a side of the motor axle box body facing away from the direct drive motor, and a length of the second reinforcing rib in the direction of the axle is less than a length of the first reinforcing rib in the direction of the axle.

22. The bogie according to claim 1, wherein a positioning circular truncated cone for fixing the motor bearing is arranged in the motor axle box body, the inner diameter of the positioning circular truncated cone is smaller than the outer diameter of the motor bearing, and one end of the motor bearing, which is far away from the direct drive motor, abuts against the positioning circular truncated cone.

23. The bogie of claim 22, wherein the outer race of the motor bearing is threadably coupled to the motor axle housing body and the inner race of the motor bearing is in interference engagement with the axle.

24. A rail vehicle, characterized by comprising a vehicle body and a bogie as claimed in any one of claims 1-23, said vehicle body being arranged on said bogie.