WO2022032806A1

WO2022032806A1 - Bogie and rail vehicle

Info

Publication number: WO2022032806A1
Application number: PCT/CN2020/116389
Authority: WO
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: 中车唐山机车车辆有限公司
Priority date: 2020-08-11
Filing date: 2020-09-21
Publication date: 2022-02-17
Also published as: CN111994109B; CN111994109A

Abstract

A bogie, comprising wheelsets (10), wheelset axle boxes (13), direct drive motors (31), and motor axle boxes (32). Each wheelset (10) comprises an axle (11) and two wheels (12) fixed on the outer peripheral surface of the axle; the axle (11) protrudes out of the two wheels (12); the wheelset axle boxes (13) are arranged at the two ends of the axle (11); each direct drive motor (31) are located between the two wheels (12); each motor axle box (32) is located between the direct drive motor (31) and each wheel (12); the rotor of the direct drive motor (31) is fixedly connected to the inner ring of a motor bearing so as to drive the axle; and the stator (3111) of the direct drive motor (31) is fixedly connected to the outer ring of the motor bearing. Further provided is a rail vehicle having the bogie. By using the direct drive motor (31) on the axle (11) to directly drive the axle (11) to rotate, the present application omits a gear transmission mechanism between the motor and the axle in the prior art, reduces noise when the bogie is used, and is beneficial for improving the riding experience of a passenger.

Description

Bogies and Rail Vehicles

technical field

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

Background technique

The bogie is arranged between the car body and the track, and is one of the most important components on the rail vehicle. The main functions of the bogie are: supporting the car body, bearing and transmitting various loads and forces from the car body to the wheels or from the wheel rail to the car body; ensuring the safe operation of the vehicle, flexibly running along straight lines and Pass the curve smoothly; ease the interaction between the vehicle and the wheel-rail, reduce vibration and shock, and improve the running stability and safety of the vehicle. According to whether there is a power device, the bogie can be divided into a power bogie and a non-power bogie.

In the solution of the related art, the power device on the power bogie generally adopts the combined structure of the traction motor and the gear transmission mechanism, the output end of the traction motor is connected with the gear transmission mechanism, and the terminal gear of the gear transmission mechanism is sleeved on the axle, The driving force of the traction motor is applied to the axle to drive the wheels to rotate.

However, with the solution in the related art, since the gear transmission mechanism generates noise during the working process, the bogie has a relatively large noise, and the power loss during the transmission process is relatively large.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a bogie and a rail vehicle, which are mainly used to solve the problems of high noise and large power loss of the bogie in the related art.

An embodiment of the first aspect of the present application provides a bogie, including:

a wheelset, the wheelset includes an axle and two wheels fixed on the outer peripheral surface of the axle, the axle protrudes beyond the two wheels;

A wheel-to-axle box, the wheel-to-axle box is arranged at both ends of the axle, the wheel-to-axle box includes a wheel-to-axle box bearing and a wheel-to-axle box body, and the inner ring of the wheel-to-axle box bearing is fixed On the outer peripheral surface of the axle, the outer ring of the wheelset axle box bearing is fixed with the wheelset axle box body;

a direct drive motor, located between the two said wheels;

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

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

According to a second aspect of the embodiments of the present application, a rail vehicle is provided, including a vehicle body and the above-mentioned bogie, the vehicle body being disposed on the bogie.

Using the bogie and the rail vehicle according to the embodiment of the present application, the bogie includes a wheel set, a wheel set axle box, a direct drive motor and a motor axle box, the wheel set includes an axle and two wheels fixed on the outer peripheral surface of the axle, and the axle protrudes In addition to the two wheels, the wheel-set axle boxes are arranged at both ends of the axle. The wheel-set axle boxes include the wheel-set axle box bearings and the wheel-set axle box body. The inner ring of the wheel-set axle box bearings is fixed on the outer peripheral surface of the axle. The outer ring of the wheel set axle box bearing is fixed with the wheel set axle box body; the direct drive motor is located between the two wheels; the motor axle box is located between the direct drive motor and the wheel, and the motor axle box includes the motor bearing and the motor axle box body. The inner ring of the motor bearing is fixed on the outer peripheral surface of the axle, and the outer ring of the motor bearing is fixed with the motor shaft box body; wherein, 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 connected to the motor The outer ring of the bearing is fixedly connected. The present application adopts the direct drive motor disposed on the axle to directly drive the axle to rotate, thereby eliminating the gear transmission mechanism between the motor and the axle in the related art, reducing the noise when the bogie is in use, and helping to improve the riding experience of passengers ; The use of direct drive motor for driving can also reduce the loss of motor power, improve transmission efficiency, reduce maintenance frequency and reduce maintenance costs. In addition, arranging the wheelset axle box on the outer side of the wheel is beneficial to save the space on the inner side of the frame, so as to facilitate the installation of other components.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an inappropriate limitation to the present application. In the attached image:

1 is a schematic structural diagram of a bogie provided by an embodiment of the present application;

Shown in Figure 2 is a side view of Figure 1;

Shown in Fig. 3 is the bottom view of Fig. 1;

Figure 4 shows a schematic diagram of the connection structure of the wheelset and the drive device provided by an embodiment of the present application;

5 is a schematic diagram of the connection structure of the motor shaft box and the end cover provided by an embodiment of the present application;

Figure 6 shows a schematic structural diagram of an end cap provided by an embodiment of the present application;

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

Shown in Figure 8 is the A-A sectional view of Figure 7;

9 is a schematic structural diagram of a motor shaft box provided by an embodiment of the present application from a first perspective;

Figure 10 shows a schematic structural diagram of a motor shaft box provided by an embodiment of the present application from a second perspective;

Figure 11 shows a top view of a motor axle box provided by an embodiment of the present application;

Shown in Figure 12 is the B-B sectional view of Figure 11;

Figure 13 shows a schematic structural diagram of a framework provided by an embodiment of the present application;

Figure 14 shows a schematic structural diagram of a side beam provided by an embodiment of the present application;

15 is a schematic structural diagram of a beam provided by an embodiment of the present application;

Figure 16 shows a schematic diagram of the connection structure of the side beam and the cross beam provided by an embodiment of the present application;

FIG. 17 shows a schematic structural diagram of a wheelset axle box provided by an embodiment of the present application.

Reference number:

10-wheelset; 11-axle; 12-wheel; 13-wheelset axle box; 131-primary spring support seat;

20-frame; 21-side beam; 211-first hinge part; 2111-hinge pin seat; 2112-pressing sleeve; 2113-positioning ring; 2114-hinge end cover; Clamp hanger; 214-transverse shock absorber seat; 215-anti-roll torsion bar mount; 216-secondary spring mount; 22-beam; 221-sub-beam; 2211-traction rod mount; 22111-traction Tie rod node mount; 22112-triangular plate rubber node mount; 222-support beam; 2221-lateral buffer mount; 223-connecting beam; 2231-connecting beam main body; 2232-first connecting part; 2233-second connecting part ; 2234 - second hinge; 22341 - hinge pin; 22342 - center bolt;

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

40 - a series of springs;

50-Secondary series spring;

60 - Traction device.

detailed description

In order to make the technical solutions and advantages of the embodiments of the present application more clear, the exemplary embodiments of the present application will be 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 embodiments are exhaustive. It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict.

Fig. 1 shows a schematic structural diagram of a bogie provided by an embodiment of the present application; Fig. 2 shows a side view of Fig. 1; Fig. 3 shows a bottom view of Fig. 1; 1 - Figure 3.

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

Wherein, the wheelset 10 is arranged below the frame 20 for contacting the track. The number of wheel pairs 10 can be set as required, such as two, three and so on. Each wheel set 10 includes an axle 11 and two wheels 12 fixed on the outer peripheral surface of the axle 11. The wheels 12 are the direct parts of the bogie in contact with the track. The axle 11 is used to transmit the power of the driving device to the wheels 12, so as to The wheels 12 are driven to move along the track. The axle 11 protrudes beyond the two wheels 12 , and the wheel-set axle boxes 13 are connected to both ends of the axle 11 . The wheelset axlebox 13 includes a wheelset axlebox bearing and a wheelset axlebox body, the inner ring of the wheelset axlebox bearing is fixed on the outer peripheral surface of the axle, and the outer ring of the wheelset axlebox bearing is fixed with the wheelset axlebox body. In this embodiment, the axle 11 can be a hollow shaft, so as to reduce the weight of the bogie on the premise of satisfying the strength.

The frame 20 is the main bearing structure of the bogie, and is used to install other components on the bogie. The frame 20 includes two opposite side members 21 and a cross member 22 connecting the two side members 21 . The side members 21 are perpendicular to the axles 11 and are connected to the wheelset axle boxes 13 located at the same end of the two axles 11 .

Specifically, the cross beam 22 includes a main body part for connecting the traction device and a connecting part for hinged connection with the side beam 21 , the connecting parts are arranged at both ends of the main body part, and the width of the connecting part gradually decreases in the direction away from the main body part ; One end of the connecting part away from the main body part is movably connected with the side beam 21 .

Through the above arrangement, the side beam 21 and the cross beam 22 are hingedly connected, and the rotational freedom is completely released, so that the side beam 21 and the wheelset have good followability. This embodiment realizes the flexibility of the frame 20, and the frame 20 itself can also bear a part of the track twist, reducing the deflection change caused by the track twist, so that the bogie has good adaptability on both straight and curved roads. Conducive to improving passenger comfort. The width of the connecting portion is gradually reduced so that a gap can be formed between the connecting portion and the side beam 21 , and the gap can ensure that the cross beam 22 can have a larger amount of rotation relative to the side beam 21 to avoid collision between the cross beam 22 and the side beam 21 . In addition, the space in the part of the clearance can be fully utilized to set other parts on the bogie (such as the brake caliper hanger, etc.).

The driving device is used to provide power for the bogie. In this embodiment, the driving device can be selected as a direct drive motor 31, which is arranged on the axle 11 and located between the two wheels 12. The direct drive motor 31 is used for direct drive. The axle 11 is driven to rotate, so that the intermediate transmission structure can be omitted.

The driving device also includes motor axle boxes 32 arranged on both 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 to provide support for the direct drive motor, so that the The direct drive motor 31 can be fixed to the axle 11 . The motor shaft box 32 includes a motor bearing and a motor shaft box body 321 , the inner ring of the motor bearing is fixed on the outer peripheral surface of the axle 11 , and the outer ring of the motor bearing is fixed with the motor shaft box body 321 . The rotor of the direct drive motor 31 is fixedly connected to the inner ring of the motor bearing to drive the axle 11 , and the stator of the direct drive motor 31 is fixedly connected to the outer ring of the motor bearing.

The primary spring 40 is installed between the wheelset axle box 13 and the side beam 21 of the frame 20; the secondary spring 50 is installed between the side beam 21 of the frame 20 and the vehicle body; the traction device 60 is installed on the cross beam 22 for Attach the car body to transfer the load.

In this embodiment, the direct-drive motor 31 disposed on the axle 11 is used to directly drive the axle 11 to rotate, thereby eliminating the gear transmission mechanism between the motor and the axle in the related art, reducing the noise when the bogie is in use, and helping to improve passenger traffic. ride experience. The direct drive motor 31 is used for driving, since intermediate transmission relief is omitted, the loss of motor power can be reduced, and the transmission efficiency can be improved. Compared with the gear transmission structure, the use of the direct drive motor 31 can also reduce maintenance frequency and maintenance cost. In addition, arranging the wheelset axle box 13 on the outer side of the wheel 12 is beneficial to save the space inside the frame 20 so as to facilitate the installation of other components.

FIG. 4 shows a schematic diagram of the connection structure of the wheelset and the driving device provided by an embodiment of the present application; please continue to refer to FIG. 4 . In this embodiment, the outer shape of the casing 311 can be set as required, for example, it can be cylindrical or prismatic. The casing 311 is sleeved on the axle 11 . The casing 311 is provided with a rotor (not shown in the figure) and a stator 3111 , which are arranged opposite to each other. When the direct drive motor 31 is energized, a magnetic force is generated between the stator 3111 and the rotor to drive the rotor to rotate, so that the axle 11 rotates with the rotor, thereby driving the wheels 12 .

FIG. 5 shows a schematic diagram of the connection structure of the motor shaft box and the end cover 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 caps 3112 , and the end caps 3112 have a through-end cap shaft hole for the axle 11 to pass through. The two end caps 3112 are fixed on both ends of the casing 311, the axle 11 passes through the shaft holes of the two end caps and the hollow part of the casing 311, and the end of the end cap 3112 facing away from the casing 311 is fixed with the motor shaft box body, so as to realize The stator 3111 is fixedly connected to the outer ring of the motor bearing. That is, the motor axle box 32 is arranged on the axle 11 through the motor bearing, and one end of the motor axle box 32 is also connected to the end cover 3112 on the casing 311 , and the casing is connected by the motor axle boxes 32 arranged on both sides of the casing 311 311 supports, so that the stator 3111 and the rotor in the housing 311 can be separated from each other by a certain gap, and the axle 11 can rotate within the gap to transmit power.

Figure 6 shows a schematic diagram of the structure of an end cap provided by an embodiment of the present application; Figure 7 shows a front view of an end cap provided by an embodiment of the present application; Figure 8 shows Figure 7 AA cross-sectional view; shown in FIG. 9 is a schematic structural diagram of the motor axle box provided by an embodiment of the present application from a first perspective; what is shown in FIG. 10 is the motor axle box provided by an embodiment of the present application. A schematic diagram of the structure from two perspectives; FIG. 11 shows a top view of a motor axle box provided by an embodiment of the present application; FIG. 12 shows a BB cross-sectional view of FIG. 11 ; please continue to refer to FIGS. 6-12 .

Optionally, the end cap 3112 of this embodiment includes an end cap body 31121, and one end of the end cap body 31121 facing the casing 311 is provided with a first boss 31122 for connecting the casing 311, and two end faces of the casing 311 have clips respectively. slot, the two end caps 3112 and the housing 311 are snap-fitted and installed through the first boss 31122 and the card slot.

The end cap body 31121 has a threaded hole of the end cap body, the casing 311 has a casing threaded hole matched with the threaded hole of the end cap body, and the bolts pass through the threaded hole of the end cap body and the threaded hole of the casing in turn to realize the end cap 3112 and the casing 311 fixed connection.

One end of the end cover body 31121 away from the casing 311 is provided with a second boss 31123 , and a first connecting plate 31124 for connecting the motor shaft box 32 is provided on the outer peripheral side of the second boss 31123 .

The motor shaft box 32 includes a motor shaft box body 321 , one end of the motor shaft box 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 box 32 and the end cover 3112 pass through the first connecting plate 31124 It is fixed by connection with the second connecting plate 322 .

In an optional embodiment, the first connection plate 31124 is provided with a plurality of first fixing holes, the second connection plate 322 is provided with a plurality of second fixing holes, the plurality of first fixing holes and the plurality of second fixing holes The fixing holes correspond to each other one by one, and the fasteners pass through the first fixing hole and the second fixing hole in sequence so that the first connecting plate 31124 and the second connecting plate 322 are fixedly connected.

The side of the motor shaft box body 321 facing the direct drive motor 31 is provided with an annular butting groove; the part of the second boss 31123 protruding from the first connecting plate 31124 serves as an alignment protrusion; the alignment protrusion and the butting groove The docking realizes the alignment of the end cover 3112 and the motor shaft box body 321 .

Figure 13 shows a schematic structural diagram of a frame provided by an embodiment of the application; Figure 14 shows a schematic structural diagram of a side beam provided by an embodiment of the application; Figure 15 shows the application A schematic structural diagram of a beam provided in an embodiment; please continue to refer to FIGS. 13-15 .

Optionally, in this embodiment, the two ends of the beam 22 are respectively movably connected to the two side beams 21, that is, a certain displacement can be generated in any direction between the beam 22 and the side beams 21 in this embodiment, so that the frame The frame 20 becomes a flexible frame, and the frame 20 itself also bears a part of the torsion, reducing the deflection of the primary spring 40 caused by the track twist. That is to say, this embodiment can make the vehicle body more adaptable to the curved road by changing the angle of the cross member 22 and the side member 21 in the horizontal direction; Concave and convex rail surface; to ensure that the bogie has a certain flexibility, to alleviate the influence of track distortion, and to maintain the stability of the car body.

Optionally, in this embodiment, the middle part of the side beam 21 is provided with a first hinge part 211 , and both ends of the beam 22 are provided with a second hinge part 2234 , and the side beam 21 and the beam 22 are connected by the first hinge part 211 and the second hinge part. Section 2234 is hingedly connected.

Specifically, FIG. 16 shows a schematic diagram of a connection structure between a side beam and a cross beam provided by 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, and a pressure sleeve 2112, a positioning ring 2113 and a hinge end cover 2114 are arranged in the cavity. , the positioning ring 2113 is located on the side away from the beam 22, the end of the pressure sleeve 2112 close to the beam 22 abuts on the inner wall of the cavity, the positioning ring 2113 presses the end of the pressure sleeve 2112 away from the beam 22 through the fastener, the positioning ring 2113 It is sleeved on the outside of the hinged end cover 2114 . The pressure sleeve 2112 can choose a rubber sleeve to better adapt to the deformation.

The second hinge portion 2234 includes a hinge pin 22341 and a center bolt 22342. The hinge pin 22341 is passed through the pressing sleeve 2112 and abuts with the hinge end cover 2114. The center bolt 222342 passes through the hinge end cover 2114 and is fixed in the hinge pin 22341. Thus, the first hinge portion 211 and the second hinge portion 2234 are hingedly connected.

Through the above solution, the side beams 21 and the cross beams 22 are hingedly connected, and the rotational freedom is completely released, so that the side beams 21 and the wheelset 10 have good followability. This embodiment realizes the flexibility of the frame 20, and the frame 20 itself can also bear a part of the track twist, reducing the deflection change caused by the track twist, so that the bogie has good adaptability on both straight and curved roads. Conducive to improving passenger comfort.

In this embodiment, the main part of the beam 22 includes two sub-beams 221 arranged opposite to each other and two supporting beams 222 arranged between the two sub-beams 221 , and the connecting part includes two connecting beams 223 respectively connecting the two ends of the two sub-beams 221 .

The connecting beam 223 includes a connecting beam main body 2231. One end of the connecting beam main body 2231 facing the sub-beam is provided with a first connecting portion 2232 and a second connecting portion 2233 for connecting the two sub-beams. The first connecting portion 2232 and the second connecting portion 2233 intersect, a gap is formed between the first connecting portion 2232, the second connecting portion 2233 and the side beam 21, and the end of the connecting beam main body 2231 facing away from the cross beam is provided with a second hinge portion 2234. 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. The clearance can ensure that the cross beam 22 can have a larger amount of rotation relative to the side beam 21 , so as to avoid collision between the cross beam 22 and the side beam 21 . In addition, the space in the part of the clearance can be fully utilized to set other parts on the bogie (such as the brake caliper hanger, etc.).

In this embodiment, both ends of the beam 22 are hinged with the side beam 21 , so that the beam 22 can have a larger displacement relative to the side beam 21 , thereby improving the flexibility of the frame 20 . The beam frame formed by the two sub beams 221 and the two supporting beams 222 ensures the strength of the beam 22 itself.

Further, the two support beams 222 are provided with lateral buffer mounts 2221, the lateral buffer mounts 2221 are arranged on the side of the support beam facing 222 to the other support beam 222, and the two lateral buffer mounts 2221 are opposite to each other. The two ends of the lateral buffer are respectively connected to the two lateral buffer mounts 2221. By setting the lateral buffer on the lateral buffer mounts 2221, the lateral movement limit of the bogie can be realized, and the lateral swing of the rubber can be realized. The buffer and vibration damping effect ensure the installation and operation of the vehicle.

Optionally, two sub-beams 221 are provided with traction rod mounting bases 2211. The traction rod mounting bases 2211 include traction rod node mounting bases 22111 and triangular plate rubber node mounting bases 22112 for connecting the direct drive motor. The traction rod node mounting bases 22111 and the triangular plate rubber node mounting seat 22112 are integrally formed, which not only realizes the connection between the direct drive motor 31 and the frame 20, but also realizes the connection between the traction rod and the frame 20, ensures the transmission of traction and driving force, and realizes the transmission of vehicle running power. Provide and deliver. One end of the traction rod is connected to the traction rod node mounting seat 22111, and the other end of the traction rod is connected to the traction device 60 on the frame 20; on the housing 311 of the drive motor 31 .

FIG. 17 shows a schematic structural diagram of a wheelset axle box provided by an embodiment of the present application; please refer to FIGS. 1 and 17 . Further, both ends of the side beam 21 in this embodiment are provided with two primary spring mounting seats 212, and the two primary spring mounting seats 212 are arranged at intervals; both ends of the wheelset axle box 13 pass through the primary spring 40. Connected to the first series spring mounting seat 212, the two sides of the wheelset axle box 13 are respectively provided with first series spring support seats 131, the lower end of the first series spring 40 is installed on the first series spring support seat 131, and the first series spring 40 The upper end is connected to a series of spring mounts 212 . A series of springs 40 realize the connection and positioning between the frame 20 and the wheelset 10, so that the frame 20 can relieve the vertical vibration caused by road unevenness. In this embodiment, the primary spring 40 can be selected from a primary rigid spring, a rubber pile spring, or a combination of a steel spring and a rubber spring.

The side beam 21 further includes two brake caliper hangers 213 located on both sides of the first hinge portion 211 , and the brake caliper hangers 213 are arranged on the side of the side beam 21 facing the cross beam 22 . The brake caliper hanger 213 is used to install the brake caliper for tread braking. The brake caliper hanger 213 is arranged on the inner side between the two wheel pairs 10 , making full use of the space for installation and improving the installation space of the frame 20 degree of utilization.

The side beam 21 further includes a lateral shock absorber seat 214 disposed below the first hinge portion 211 , and the lateral shock absorber seat 214 and the primary spring mounting seat 212 are located on the same side of the side beam 21 . The transverse shock absorber seat 214 is used to install the transverse shock absorber on the traction device, one end of the transverse shock absorber is connected to the transverse shock absorber seat 214, and the other end of the transverse shock absorber is connected to the traction device 60 on the frame 20 to Alleviate lateral vibration caused by uneven track or curved movement during vehicle operation.

The side beam 21 further includes an anti-roll torsion bar mounting seat 215 , and the anti-roll torsion bar mounting seat 215 and the primary spring mounting seat 212 are located on the same side of the side beam 21 and close to the lateral shock absorber seat 214 . The anti-roll torsion bar mounting seat 215 is used to install the anti-roll torsion bar, and the two ends of the anti-roll torsion bar are respectively connected to the anti-roll torsion bar mounting seat 215 on the two side beams 21 to prevent the vehicle from steering Shake between the racks to ensure the safe operation of the vehicle.

The side beam 21 further includes a secondary spring mounting seat 216 disposed above the first hinge portion 211 , and the secondary spring mounting seat 216 is provided on the other side of the side beam 21 opposite to the primary spring mounting seat 212 . The secondary spring 50 is installed on the secondary spring mounting seat 216 and connected to the vehicle body. The secondary spring 50 can further alleviate the vibration of the wheelset 10, and reduces the vibration of the vehicle body through two-stage mitigation, ensuring the comfort of passengers. The secondary spring 50 can optionally be an air spring.

Please continue to refer to FIGS. 6-12 below. Further, the motor shaft box 32 of this embodiment also includes a positioning platform 323 and a base 324 arranged on the outer peripheral side of the motor shaft box body 321. The platform 323 is used for installation and positioning of the motor shaft box 32 , and the base 324 is used to provide support when the motor shaft box 32 is placed.

The base 324 includes an annular protrusion disposed on the outer peripheral side of the motor shaft box body 321 . The annular protrusion can play a good supporting role, and because the interior is hollow, the weight of the motor shaft box body 321 can be reduced.

The motor axle box 32 also includes a reinforcing rib arranged on the outer peripheral side of the motor axle box body 321 and located between the positioning platform 323 and the base 324. The reinforcing rib can make the motor axle box body 321 choose a thinner wall thickness, thereby reducing the motor axle box. The weight of the body 321 . By arranging the reinforcing ribs, the motor axle box body 321 can be ensured to have good strength, which is beneficial to the lightening of the motor axle box 32 .

The reinforcing ribs include a plurality of first reinforcing ribs 327 located in the middle of the motor shaft box 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 box body 321 in a convex shape.

The reinforcing rib further includes a second reinforcing rib 326 on the side of the motor axle box body 321 away from the direct drive motor 31 . The second reinforcing rib 326 mainly plays the role of strengthening the strength of the end portion, so as to avoid the local strength being too low.

The motor shaft box body 321 is provided with a positioning round table 325 for fixing the motor bearing. The inner diameter of the positioning round table 325 is smaller than the outer diameter of the motor bearing. The end of the motor bearing facing away from the direct drive motor 31 abuts on the positioning round table 325. One side of the driving motor 31 abuts on the end cover 3112, and the positioning circular table 325 can limit the displacement of the motor bearing to keep it stable.

The outer ring of the motor bearing is threadedly connected with the motor shaft box body 321, and the inner ring of the motor bearing is connected with the axle 11 by interference. The ring rotates relative to the outer ring of the motor bearing.

Embodiment 2

This embodiment provides a rail vehicle, including a vehicle body and the bogie as described in the first embodiment above, and the vehicle body is arranged on the bogie.

Since the rail vehicle in this embodiment adopts the bogie described in the first embodiment, the noise is small, which is beneficial to improve the riding experience of passengers.

In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "front", "rear", "first", "tail", etc. is based on the orientation or positional relationship shown in the accompanying drawings, only for the purpose of It is convenient to describe the application and to simplify the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the application.

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

In this application, unless otherwise expressly specified and limited, terms such as "installation" and "connection" should be understood in a broad sense; taking connection as an example, it can be directly connected, or indirectly connected through an intermediate medium, or two Connectivity within an element or interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

While a few alternative embodiments of the present application have been described, additional changes and modifications to these embodiments may occur to those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include alternative embodiments and all changes and modifications that fall within the scope of the present application.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these 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 also intended to include these modifications and variations.

Claims

A bogie, comprising:

a wheelset, the wheelset includes an axle and two wheels fixed on the outer peripheral surface of the axle;

A wheel-to-axle box, the wheel-to-axle box is arranged at both ends of the axle, the wheel-to-axle box includes a wheel-to-axle box bearing and a wheel-to-axle box body, and the inner ring of the wheel-to-axle box bearing is fixed On the outer peripheral surface of the axle, the outer ring of the wheelset axle box bearing is fixed with the wheelset axle box body;

a direct drive motor, located between the two said wheels;

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

Wherein, the rotor of the direct drive motor and the inner ring of the motor bearing are fixed by a connecting piece to drive the axle, and the stator of the direct drive motor and the outer ring of the motor bearing are fixed by a connecting piece.
The bogie according to claim 1, wherein the direct drive motor further comprises:

a casing, the rotor and the stator are arranged in the casing, and the casing is fixed with the stator;

two end caps, the end caps have through-end cap shaft holes, the two end caps are fixed at both ends of the casing, the axles pass through the two end cap shaft holes and the shell The hollow part of the body, and the end of the end cover facing away from the casing is fixed to the motor shaft box body, so as to realize the fixed connection between the stator and the outer ring of the motor bearing.
The bogie of claim 2, wherein the end cover comprises:

an end cap body, the end of the end cap body facing the casing is provided with a first boss for connecting the casing;

The two end faces of the casing are respectively provided with card slots, and the two end caps and the casing are snap-fitted and installed through the first bosses and the card slots;

The end cap body has an end cap body threaded hole, the casing has a casing threaded hole matched with the end cap body threaded hole, and the bolts pass through the end cap body threaded hole and the casing threaded hole in sequence The fixed connection between the end cover and the housing is realized.
The bogie according to claim 3, wherein a second boss is provided on the end of the end cover body away from the casing, and an outer peripheral side of the second boss is provided with a connection for connecting the motor shaft the first connecting plate of the box;

One end of the motor shaft box body facing the end cover is provided with a second connecting plate for connecting the end cover, and the motor shaft box and the end cover are connected with the second connecting plate through the first connecting plate The connection of the board is fixed.
The bogie according to claim 4, wherein a plurality of first fixing holes are formed on the first connecting plate, a plurality of second fixing holes are formed on the second connecting plate, and a plurality of the first fixing holes are formed on the second connecting plate. The first fixing holes are in one-to-one correspondence with the plurality of second fixing holes, and the fasteners pass through the first fixing holes and the second fixing holes in sequence to make the first connecting plate and the second connecting plate fixedly connected.
The bogie according to claim 4, wherein a side of the motor axle box body facing the direct drive motor is provided with an annular butting groove;

The part of the second boss protruding from the first connecting plate is used as an alignment protrusion;

The butting of the alignment protrusion and the abutment groove realizes the alignment of the end cover and the motor shaft box body.
The bogie according to any one of claims 1-6, further comprising a frame, the frame comprising two opposite side beams and a cross beam connecting the two side beams, the side beams being vertical On the axle and connected on the wheelset axle box, the two ends of the cross beam are respectively movably connected with the two side beams.
The bogie according to claim 7, wherein the middle part of the side beam is provided with a first hinge part, the two ends of the beam are provided with a second hinge part, and the side beam and the beam pass through each other. The first hinge part and the second hinge part are hingedly connected.
The bogie according to claim 8, wherein the first hinge part comprises a hinge pin seat provided in the side beam, a cavity is formed in the hinge pin seat, and a cavity is provided in the cavity. There are a pressure sleeve, a positioning ring and a hinged end cover, the positioning ring is located on the side away from the beam, the end of the pressure sleeve close to the beam abuts on the inner wall of the cavity, and the positioning ring passes through The fastener presses one end of the pressing sleeve away from the beam, and the positioning ring is sleeved on the outer side of the hinged end cover;

The second hinge part includes a hinge pin and a center bolt, the hinge pin is penetrated in the pressing sleeve and abuts with the hinge end cover, and the center bolt passes through the hinge end cover and is fixed at the end. inside the hinge pin.
The bogie according to claim 8, wherein the beam comprises two sub-beams arranged opposite to each other, two support beams arranged between the two sub-beams, and two sub-beams respectively connecting the two sub-beams. two connecting beams at the ends;

The connecting beam includes a connecting beam main body, and one end of the connecting beam main body facing the sub-beam is provided with a first connecting part and a second connecting part for connecting the two sub-beams, the first connecting part and the second connecting part. The two connecting parts intersect, a gap is formed between the first connecting part and the second connecting part and the side beam, and the second hinge part is provided at the end of the connecting beam main body facing away from the sub-beam.
The bogie according to claim 10, wherein a lateral buffer mounting seat is provided on both of the support beams, and the lateral buffer mounting seat is arranged on one side of the support beam facing the other support beam. side, the two lateral buffer mounts are oppositely arranged;

Both ends of the lateral buffer are respectively connected to the two lateral buffer mounting seats.
The bogie according to claim 11, wherein the two sub-beams are provided with a traction rod mounting seat, the traction rod mounting seat comprises a traction rod node mounting seat and a triangle plate rubber node mounting seat, the The traction rod node mounting seat and the triangular plate rubber node mounting seat are integrally formed;

The bogie further includes a pulling rod, connecting the pulling rod and a pulling device; the pulling device is located in the frame-shaped space enclosed by the sub-beam and the supporting beam;

One end of the traction rod is connected to the traction rod node mounting seat through a rubber node, and the other end of the traction rod is connected to the traction device on the frame through a rubber node; one end of the connecting rod is connected to the triangle plate On the rubber node mounting seat, the other end of the connecting rod is connected to the housing of the direct drive motor.
The bogie according to claim 8, wherein both ends of the side beam are provided with two primary spring mounting seats, and the two primary spring mounting seats are arranged at intervals;

The bogie further includes a primary spring installed between both ends of the wheelset axle box and the primary spring mounting seat.
The bogie according to claim 13, wherein the side beam further comprises two brake caliper hangers located on both sides of the first hinge portion, the brake caliper hangers are provided at the the side beam facing the cross beam;

The bogie also includes a brake caliper for providing braking, the brake caliper mounted on the brake caliper hanger.
The bogie according to claim 14, wherein the side member further comprises a lateral shock absorber seat disposed below the first hinge portion, the lateral shock absorber seat is mounted with the primary spring the seat is located on the same side of the side beam;

The bogie further includes a transverse shock absorber, one end of the transverse shock absorber is connected to the transverse shock absorber seat, and the other end of the transverse shock absorber is connected to the traction device on the frame.
The bogie according to claim 15, wherein the side member further comprises an anti-roll torsion bar mounting seat, and the anti-roll torsion bar mounting seat and the primary spring mounting seat are located on the side member on the same side and close to the lateral shock absorber seat;

The bogie further includes an anti-roll torsion bar, and both ends of the anti-roll torsion bar are respectively connected to the anti-roll torsion bar mounting seats on the two side beams.
The bogie according to claim 16, wherein the side beam further comprises a secondary spring mounting seat provided above the first hinge portion, the secondary spring mounting seat being provided on the side beam the other side opposite the primary spring mount;

The bogie further includes 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 to the vehicle body.
The bogie according to claim 1, wherein a positioning platform and a base are provided on the outer periphery of the motor axle box body, and the positioning platform and the base are arranged oppositely; the positioning platform is used for installing other parts, and the The base is used to provide support when the motor axle box is placed.
The bogie according to claim 18, wherein the base comprises an annular protrusion disposed on the outer periphery of the motor axle box body.
The bogie according to claim 18, wherein a reinforcing rib is further provided on the outer peripheral side of the motor axle box body, and the reinforcing rib is located between the positioning platform and the base.
The bogie according to claim 20, wherein the reinforcing ribs comprise a plurality of first reinforcing ribs located in the middle of the motor axle box body, and the plurality of first reinforcing ribs are arranged at intervals from each other.
The bogie according to claim 21, wherein the reinforcing rib further comprises a second reinforcing rib located on the side of the motor axle box body away from the direct drive motor, and the second reinforcing rib is along the The length in the axle direction is smaller than the length in the axle direction of the first reinforcing rib.
The bogie according to claim 18, wherein the motor axle box body is provided with a positioning circular table for fixing the motor bearing, the inner diameter of the positioning circular table is smaller than the outer diameter of the motor bearing, the One end of the motor bearing facing away from the direct drive motor abuts on the positioning circular table.
The bogie according to claim 23, wherein the outer ring of the motor bearing is threadedly connected with the motor axle box body, and the inner ring of the motor bearing is connected with the axle by interference.
A rail vehicle, characterized by comprising a vehicle body and the bogie according to any one of claims 1-24, the vehicle body being arranged on the bogie.