阅读说明：本技术 转向架和具有其的轨道车辆 (Bogie and railway vehicle with same ) 是由 李百成 王升 蔡永宾 于 2020-06-28 设计创作，主要内容包括：本发明公开了一种转向架和具有其的轨道车辆,所述转向架包括：构架；制动器,所述制动器设在所述构架上；隔声罩,所述隔声罩与所述构架密封连接,所述隔声罩和所述构架共同限定出容纳空间,所述制动器设在所述容纳空间内；横向止挡,所述横向止挡设在所述隔声罩上,且所述横向止挡位于所述隔声罩的远离所述构架的中心的一侧。根据本发明的转向架,可以有效隔绝制动器产生的空气噪声,从而有效降低车内噪声和车外噪声。而且,隔声罩的体积较小,结构紧凑,可以减小整个转向架的占用空间。另外,通过将横向止挡设在隔声罩上,使转向架的集成度更好,从而可以进一步提高转向架的结构紧凑性。(The invention discloses a bogie and a rail vehicle with the same, wherein the bogie comprises: a frame; the brake is arranged on the framework; the sound insulation cover is connected with the framework in a sealing mode, an accommodating space is defined by the sound insulation cover and the framework together, and the brake is arranged in the accommodating space; the transverse stopping device is arranged on the sound insulation cover and is positioned on one side of the sound insulation cover, which is far away from the center of the framework. According to the bogie, air noise generated by the brake can be effectively isolated, so that noise inside and outside the vehicle can be effectively reduced. And the sound insulation cover has small volume and compact structure, and can reduce the occupied space of the whole bogie. In addition, the transverse stopping block is arranged on the sound insulation cover, so that the integration level of the bogie is better, and the structural compactness of the bogie can be further improved.)

1. A bogie, comprising:

a frame;

the brake is arranged on the framework;

the sound insulation cover is connected with the framework in a sealing mode, an accommodating space is defined by the sound insulation cover and the framework together, and the brake is arranged in the accommodating space;

the transverse stopping device is arranged on the sound insulation cover and is positioned on one side of the sound insulation cover, which is far away from the center of the framework.

2. The truck of claim 1, wherein the acoustic enclosure comprises:

the first cover body is arranged above the transverse stop and is in sealing connection with the framework;

the second cover body is arranged below the transverse stop and is in sealing connection with the framework;

the stop mounting frame is arranged between the first cover body and the second cover body, and the transverse stop is arranged on the stop mounting frame.

3. The bogie according to claim 2, wherein the brake comprises a brake disc and a brake caliper for clamping or unclamping the brake disc,

the braking clamp is opposite to the first cover body, and the width of the first cover body is larger than that of the second cover body.

4. The truck of claim 3, wherein the first cover includes:

the first lower cover body is connected above the stop mounting frame in a sealing manner;

the braking clamp is opposite to the first upper cover body, and the width of the first upper cover body is greater than that of the first lower cover body.

5. The truck of claim 4 wherein the first lower housing is removably attached to the stop mount.

6. The bogie according to any one of claims 1 to 5, further comprising a suspension device provided on the frame and located on a side of the sound-proof housing remote from the brake, the suspension device and the lateral stop being opposed to each other with an upper surface of the suspension device lower than a lower end surface of the first upper housing.

7. The bogie of claim 6, further comprising running wheels coupled to the brake, the running wheels being at least partially above the upper surface of the suspension device and the central axis of the running wheels being below the upper surface of the suspension device.

8. The bogie of any one of claims 1-5, wherein the frame includes an electric assembly mounting portion, one side of the electric assembly mounting portion is sealingly connected to the acoustic shield, an electric assembly is connected to the other side of the electric assembly mounting portion, the electric assembly is configured to output a braking torque, the electric assembly mounting portion has a through mounting opening, and the electric assembly is at least partially received in the mounting opening.

9. The bogie according to any one of claims 1 to 5, wherein the first cover has an access opening formed therein, the access opening being opposite the brake, and a removable access cover sealed thereto.

10. The bogie of claim 9, wherein the access opening is provided with an access cover mount protruding from an outer surface of the sound insulation cover, the access cover mount being formed with an opening communicating with the access opening, the access cover covering the opening.

11. The bogie according to claim 10, wherein the first cover body is provided with an extension portion extending horizontally away from the accommodating space, the access cover mounting seat is provided on the extension portion, one side of the extension portion away from the accommodating space is provided with a limit portion extending upwards, and the lower end of the access cover is stopped between the limit portion and the access cover mounting seat.

12. A bogie as claimed in any one of claims 1 to 5 in which the acoustic shield comprises a support layer, a damping layer, a sound absorbing layer and an acoustic barrier layer arranged in that order in a direction away from the centre of the containment space.

13. The bogie according to any one of claims 1 to 5, wherein the second cover is removably attached to the lateral stop.

14. A rail vehicle, characterized in that it comprises a bogie according to any one of claims 1-13.

Technical Field

The invention relates to the technical field of rail transit, in particular to a bogie and a rail vehicle with the same.

Background

In the related art, a brake disc of a railway vehicle may have a large disturbance effect on air when the railway vehicle runs at a high speed, so that large air noise is generated, on one hand, the riding comfort of passengers in the railway vehicle is greatly influenced, and on the other hand, the noise outside the railway vehicle has a large negative influence on the surrounding environment.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a bogie, which has a good isolation effect on air noise generated by a brake, effectively reduces noise inside and outside a vehicle, and has a small volume and low cost.

Another object of the invention is to propose a railway vehicle having a bogie as described above.

According to an embodiment of the first aspect of the present invention, a bogie comprises: a frame; the brake is arranged on the framework; the sound insulation cover is connected with the framework in a sealing mode, an accommodating space is defined by the sound insulation cover and the framework together, and the brake is arranged in the accommodating space; the transverse stopping device is arranged on the sound insulation cover and is positioned on one side of the sound insulation cover, which is far away from the center of the framework.

According to the bogie provided by the embodiment of the invention, the sound insulation cover is hermetically connected with the framework, the sound insulation cover and the framework jointly define the accommodating space, and the brake is arranged in the accommodating space, so that when the bogie is applied to a railway vehicle, air noise generated by the brake can be well isolated, the noise inside the vehicle and the noise outside the vehicle can be effectively reduced, the riding comfort of passengers inside the vehicle can be improved, and meanwhile, the influence of the noise outside the vehicle on the surrounding environment can be avoided. And, through setting up horizontal backstop, horizontal backstop can play fine backstop effect, avoids producing great lateral displacement between rail vehicle and the bogie to can guarantee rail vehicle's operation security. In addition, the sound insulation cover is small in size and compact in structure, the occupied space of the whole bogie can be reduced, and the material cost can be reduced. In addition, the transverse stopping block is arranged on the sound insulation cover, so that the integration level of the bogie is better, and the structural compactness of the bogie can be further improved.

According to some embodiments of the invention, the acoustic enclosure comprises: the first cover body is arranged above the transverse stop and is in sealing connection with the framework; the second cover body is arranged below the transverse stop and is in sealing connection with the framework; the stop mounting frame is arranged between the first cover body and the second cover body, and the transverse stop is arranged on the stop mounting frame.

According to some embodiments of the invention, the brake includes a brake disc and a brake caliper for clamping or releasing the brake disc, the brake caliper being opposite the first cover and the first cover having a width greater than a width of the second cover.

According to some embodiments of the invention, the first cover comprises: the first lower cover body is connected above the stop mounting frame in a sealing manner; the braking clamp is opposite to the first upper cover body, and the width of the first upper cover body is greater than that of the first lower cover body.

According to some embodiments of the invention, the first lower shell is removably connected to the lateral stop.

According to some embodiments of the invention, the bogie further comprises a suspension device provided on the frame and located on a side of the sound-proof housing remote from the brake, the suspension device and the lateral stop being opposite to each other, and an upper surface of the suspension device being lower than a lower end surface of the first upper housing.

According to some embodiments of the invention, the bogie further comprises running wheels connected to the brake, the running wheels being at least partially above the upper surface of the suspension arrangement and the central axes of the running wheels being below the upper surface of the suspension arrangement.

According to some embodiments of the invention, the frame includes an electric assembly mounting portion having one side sealingly connected to the acoustic enclosure and an electric assembly coupled to another side of the electric assembly mounting portion for outputting a braking torque, the electric assembly mounting portion having a mounting opening therethrough, the electric assembly being at least partially received within the mounting opening.

According to some embodiments of the invention, the first cover has an access opening formed therein, the access opening being opposite to the stopper, and the access opening is sealed with a removable access cover.

According to some embodiments of the invention, the access opening is provided with an access cover mounting seat protruding from an outer surface of the sound insulation cover, the access cover mounting seat is provided with an opening communicated with the access opening, and the access cover covers the opening.

According to some embodiments of the present invention, the first cover body is provided with an extending portion extending horizontally away from the accommodating space, the access cover mounting seat is provided on the extending portion, one side of the extending portion away from the accommodating space is provided with a limiting portion extending upwards, and a lower end of the access cover abuts against between the limiting portion and the access cover mounting seat.

According to some embodiments of the invention, the sound-proof enclosure comprises a support layer, a damping layer, a sound-absorbing layer and a sound-proof layer arranged in this order in a direction away from the center of the accommodation space.

According to some embodiments of the invention, the second cover is removably connected to the lateral stop.

A rail vehicle according to an embodiment of the second aspect of the invention comprises a bogie according to an embodiment of the first aspect of the invention described above.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a perspective view of a truck according to an embodiment of the present invention;

FIG. 2 is a side view of a truck according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged view of portion B circled in FIG. 3;

FIG. 5 is a partial perspective view of a truck according to an embodiment of the present invention;

FIG. 6 is an enlarged view of the circled portion C of FIG. 5;

FIG. 7 is an enlarged view of portion D circled in FIG. 5;

FIG. 8 is an enlarged view of section E circled in FIG. 5;

FIG. 9 is a perspective view of a motorized assembly according to an embodiment of the present invention;

fig. 10 is a schematic structural view of a railway vehicle according to an embodiment of the present invention.

Reference numerals:

100: a bogie;

1: a frame; 11: a brake; 111: a brake disc; 112: braking the clamp;

12: an electric assembly mounting portion; 13: a frame body; 14: a suspension mounting section;

15: a guide wheel mounting portion; 16: a stabilizer wheel mounting portion;

2: a transverse stop; 3: a sound insulating cover; 31: a first cover body; 311: a first lower cover body;

3111: a first burring; 3112: a second burring; 312: a first upper cover body;

313: an extension portion; 3131: a limiting part; 32: a second cover body; 33: an accommodating space;

34: a support layer; 35: a damping layer; 36: a sound absorbing layer; 37: a sound insulating layer;

4: an access cover; 41: flanging; 5: an access cover mounting base; 6: a running wheel;

61: a rim; 7: an electric assembly; 8: a guide wheel; 9: a stabilizing wheel; 10: a suspension device;

200: a rail vehicle.

Detailed Description

Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.

A bogie 100 according to an embodiment of the first aspect of the invention is described below with reference to fig. 1-10. The bogie 100 may be applied to a railway vehicle 200 such as a straddle type monorail vehicle. In the following description of the present application, the application of the bogie 100 to the railway vehicle 200 is exemplified.

As shown in fig. 1 to 3 and 5, a bogie 100 according to an embodiment of the first aspect of the present invention includes a frame 1, a stopper 11, a sound-proof cover 3, and a lateral stopper 2. The brake 11 is provided on the frame 1. The sound insulation cover 3 is connected with the framework 1 in a sealing mode.

In the present application, the phrase "the sound-proof cover 3 is sealingly connected to the frame 1" means that the joint between the sound-proof cover 3 and the frame 1 forms a closed figure. That is to say the connection of the acoustic enclosure 3 to the frame 1 forms an end-to-end closed loop structure.

As shown in fig. 3, the sound-proof cover 3 and the frame 1 together define an accommodating space 33, and the stopper 11 is provided in the accommodating space 33. In some examples of the present invention, in conjunction with fig. 1 to 3 and 5, the sound-insulating cover 3 is attached to the side of the frame 1, and the side of the sound-insulating cover 3 facing the frame 1 may be open.

Thus, when the bogie 100 is applied to the railway vehicle 200, since the brake 11 is disposed in the accommodating space 33, noise generated by high-speed rotation of the brake 11, for example, air broadband noise, can be isolated in the accommodating space 33, so that the noise inside the vehicle and the noise outside the vehicle can be reduced well, the riding comfort of passengers inside the vehicle can be improved, and the influence of the noise outside the vehicle on the surrounding environment can be avoided. Moreover, the sound insulation cover 3 has small volume and compact structure, and can reduce the material cost.

The transverse backstop 2 is arranged on the sound insulation cover 3, and the transverse backstop 2 is positioned on one side of the sound insulation cover 3 far away from the center of the framework 1. Therefore, in the running process of the rail vehicle 200, when a large transverse displacement is generated between the vehicle body of the rail vehicle 200 and the framework 1, the transverse stopper 2 can play a good stopping role, so that the running safety of the rail vehicle 200 can be ensured.

According to the bogie 100 of the embodiment of the invention, the sound insulation cover 3 is hermetically connected with the framework 1, the sound insulation cover 3 and the framework 1 jointly define the accommodating space 33, and the brake 11 is arranged in the accommodating space 33, so that when the bogie 100 is applied to a railway vehicle 200, air noise generated by the brake 11 can be well isolated, the noise inside and outside the vehicle can be effectively reduced, the riding comfort of passengers inside the vehicle can be improved, and meanwhile, the influence of the noise outside the vehicle on the surrounding environment can be avoided. Moreover, by arranging the transverse stopping device 2, the transverse stopping device 2 can play a good stopping role, so that large transverse displacement between the rail vehicle 200 and the bogie 100 is avoided, and the running safety of the rail vehicle 200 can be ensured. In addition, the sound insulation cover 3 has a small volume and a compact structure, so that the occupied space of the whole bogie 100 can be reduced, and the material cost can be reduced. In addition, by providing the lateral stopper 2 on the sound-proof cover 3, the degree of integration of the bogie 100 is improved, and the compactness of the bogie 100 can be further improved.

In some embodiments of the invention, with reference to fig. 1-3 and 5, the acoustic enclosure 3 comprises a first enclosure 31, a second enclosure 32 and a stop mounting, the first enclosure 31 being disposed above the transverse stops 2, and the first enclosure 31 being sealingly connected to the frame 1. The second cover 32 is arranged below the transverse stopper 2, and the second cover 32 is connected with the framework 1 in a sealing manner. The stop mounting frame is arranged between the first cover body 31 and the second cover body 32, and the transverse stop 2 is arranged on the stop mounting frame. Therefore, by arranging the first cover body 31, the second cover body 32 and the stop mounting frame, the installation and the disassembly of the sound insulation cover 3 are facilitated while the noise inside the vehicle and the noise outside the vehicle are effectively reduced. Moreover, the stopper mounting frame is arranged between the first cover 31 and the second cover 32, so that the integration level of the bogie 100 can be further improved, and the bogie 100 is ensured to have higher structural compactness.

In some examples of the present invention, as shown in fig. 1 to 3 and 5, the first and second covers 31 and 32 are each attached to a side of the frame 1, and a side of the first and second covers 31 and 32 facing the frame 1 may be opened. The lower end of the first cover 31 is hermetically connected with the transverse stopper 2, and the side surface of the first cover 31 is hermetically connected with the framework 1. The upper end of the second cover 32 is sealingly connected to the transverse stop 2, and the lateral surface of the second cover 32 is sealingly connected to the frame 1. So set up, simple structure is compact, makes the occupation space of sound proof cover 3 less, conveniently arranges.

In some embodiments of the invention, the truck 100 may also include a vertical stop. Therefore, when a large longitudinal displacement is generated between the body of the rail vehicle 200 and the bogie 100, the vertical stopper can play a good role of stopping, so that the operation safety of the rail vehicle 200 can be ensured.

In some embodiments of the present invention, as shown in fig. 3, the brake 11 includes a brake disc 111 and a brake caliper 112, the brake caliper 112 is used for clamping or releasing the brake disc 111, the brake caliper 112 is opposite to the first cover 31, and the width of the first cover 31 is greater than that of the second cover 32. Therefore, by making the width of the first cover 31 larger than the width of the second cover 32, the braking clamp 112 can be accommodated in the accommodating space 33 between the first cover 31 and the frame 1, so that the width of the second cover 32 can be smaller, the mold structure is simple, the cost can be reduced, and the whole sound insulation cover 3 is more compact in structure and saves space.

In some embodiments of the present invention, referring to fig. 3 and 5, first shell 31 includes a first lower shell 311 and a first upper shell 312. The first lower cover 311 is hermetically connected above the transverse stopper 2, the first upper cover 312 is detachably connected above the first lower cover 311, the brake caliper 112 is opposite to the first upper cover 312, and the width of the first upper cover 312 is greater than that of the first lower cover 311. Therefore, by making the width of the first upper cover 312 larger than the width of the first lower cover 311, the brake caliper 112 can be accommodated in the accommodating space 33 between the first upper cover 312 and the frame 1, so that the width of the first lower cover 311 can be small, the mold structure is simple, the cost can be reduced, and the structure of the first cover 31 is more compact, and the space is saved.

In some examples of the present invention, referring to fig. 3, the width of the first lower cover 311 and the width of the second cover 32 may be substantially equal, and the width of the first lower cover 311 and the width of the second cover 32 are both smaller than the width of the first upper cover 312, so that the structure of the sound-insulating cover 3 may be more compact, the occupied space may be reduced, and the arrangement may be facilitated.

In some embodiments of the present invention, in conjunction with fig. 5 and 8, the first lower shell 311 is removably connected to the lateral stopper 2. With such an arrangement, the first lower cover 311 and the transverse stopper 2 can be reliably connected, and the structure is simple and the assembly and disassembly are convenient.

In some examples of the present invention, as shown in fig. 5 and 8, the lower end of the first lower cover 311 may be provided with a first flange portion 3111 extending horizontally outward, and the first flange portion 3111 may be connected to the lateral stopper 2 by a threaded fastener such as a bolt. Therefore, through the arrangement, the first lower cover body 311 can be firmly connected with the transverse stop 2, the installation and the disassembly are convenient, and the cost is lower.

In some embodiments of the invention, referring to fig. 1, the bogie 100 further comprises a suspension device 10, the suspension device 10 is provided on the frame 1, the suspension device 10 is located on a side of the sound-proof housing 3 away from the stopper 11, the suspension device 10 and the lateral stopper 2 are opposite to each other, and an upper surface of the suspension device 10 is lower than a lower end surface of the second housing 24. By the arrangement, interference between the second cover 24 and the suspension device 10 can be avoided, and the second cover 24 can be conveniently mounted and dismounted.

In some embodiments of the invention, referring to fig. 10, the bogie 100 further comprises running wheels 6, the running wheels 6 being connected to the brake 11, the running wheels 6 being at least partially above the upper surface of the suspension arrangement 10, and the central axis of the running wheels 6 being below the upper surface of the suspension arrangement 10. Therefore, the part of the walking wheels 6 protruding out of the floor is small, a certain low floor is realized, the proportion of the protruding parts of the walking wheels 6 occupying the space in the vehicle is reduced, the height of the floor and the gravity center of the rail vehicle 200 are reduced, the passenger capacity and the permeability in the vehicle are ensured, and the riding comfort of passengers is improved.

In some examples of the invention, and with reference to fig. 10, the running wheels 6 are provided in the frame 1, and the brake discs 111 can be connected to the axles of the running wheels 6. The brake caliper 112 can be used to clamp the brake disc 111, so that the brake disc 111 generates a friction torque on the axle of the running wheels 6, thereby achieving braking of the rail vehicle 200. The upper surface of the suspension 10 is connected to the bottom of the body of the rail vehicle 200, and the central axis of the running wheels 6 is located below the level of the floor. The dimension of the part of the running wheels 6 lying above the floor is smaller than the dimension of the part thereof lying below the floor. By such arrangement, the proportion of the projecting part of the walking wheel 6 occupying the space in the vehicle can be further reduced, and the riding comfort of passengers is ensured.

In some embodiments of the present invention, as shown in fig. 1, 3 and 9, the frame 1 includes an electric assembly mounting portion 12, one side of the electric assembly mounting portion 12 is hermetically connected to the sound-proof cover 3, the other side of the electric assembly mounting portion 12 is connected to an electric assembly 7, the electric assembly 7 is used for outputting braking torque, the electric assembly mounting portion 12 has a through mounting opening, and the electric assembly 7 is at least partially accommodated in the mounting opening. Wherein, the sound insulation cover 3 is connected with one side of the electric assembly mounting part 12 far away from the center of the framework 1, and the electric assembly 7 is connected with one side of the electric assembly mounting part 12 near the center of the framework 1. So set up, sound proof cover 3 and electronic assembly 7 can sealing connection in the both sides of electronic assembly installation department 12, and is sealed with the installing port, makes the noise that the high-speed rotation of stopper 11 produced for example air wide band noise can effectively be isolated in accommodation space 33 to noise and the outer noise of car can effectively be reduced in the car, passenger's riding comfort in the assurance car.

During the running of the rail vehicle 200, the electric assembly 7 can output a braking torque, i.e. control the motor to output a torque opposite to the rotation direction of the wheels to realize the deceleration or braking of the rail vehicle 200. The mechanical brake of the brake 11 is activated only in a few cases such as emergency braking, and thus the brake 11 has a short operation time and is not likely to overheat. Of course, the electric powertrain 7 may also be used to output a driving torque to control the normal operation of the rail vehicle 200.

In some examples of the invention, referring to fig. 1, the frame 1 may further comprise a frame body 13, suspension mounts 14, guide wheel mounts 15, stabilizing wheel mounts 16, and the like. Wherein, the suspension mounting part 14, the guide wheel mounting part 15 and the stabilizing wheel mounting part 16 can be all arranged on the frame body 13. Therefore, the suspension device 10 can be installed between the vehicle body and the frame body 13 through the suspension installation part 14, so that vertical, transverse and longitudinal forces between the vehicle body and the frame body 13 can be transmitted, secondary vibration reduction is provided for the railway vehicle 200, and vehicle body stability is improved; the guide wheels 8 can be horizontally mounted on the guide wheel mounting parts 15 to realize the guiding function of the bogie 100; the stabilizing wheels 9 may be horizontally mounted to the stabilizing wheel mounting parts 16, thereby ensuring smooth running of the rail vehicle 200.

Of course, only the stabilizer wheel mounting portion 16 or only the guide wheel mounting portion 15 may be provided according to the structural design requirement of the frame 1, and in this case, the stabilizer wheels 9 or the guide wheels 8 alone may play a role of guiding and maintaining the balance of the vehicle body to prevent the vehicle body from tilting.

In some examples of the invention, referring to fig. 1 and 9, the electric assembly 7 is sealingly connected to the electric assembly mounting portion 12. That is, the junction of the electric motor assembly 7 and the electric motor assembly mounting portion 12 forms a closed figure. With this arrangement, the electric assembly 7 can seal the other side of the electric assembly mounting portion 12, so as to prevent air noise generated by the brake 11 from being transmitted into or out of the vehicle through the mounting opening, thereby ensuring that the noise can be isolated in the accommodating space 33.

The electric assembly 7 may include a motor, a reducer, and the like, and the electric assembly 7 may be disposed coaxially with the rim 61 of the running wheel 6. In this way, the transmission efficiency between the electric assembly 7 such as the motor and the speed reducer and the running wheels 6 can be improved, thereby achieving better braking effect and driving effect.

In some examples of the present invention, referring to fig. 1 and 5, the electric assembly mounting portion 12 is substantially arched, so that the electric assembly 7 can be mounted, a sealed mounting opening can be ensured, the structural strength of the electric assembly mounting portion 12 can be improved, and the electric assembly mounting portion 12 can better reinforce the structure of the frame 1.

In some embodiments of the present invention, referring to fig. 1, 2 and 5, the first cover 31 is formed with an access opening, which is opposite to the stopper 11 and is sealed with a detachable access cover 4. From this, through the aforesaid setting, when guaranteeing the leakproofness of sound proof cover 3 in order to reduce noise in the car and noise outside the car, conveniently overhaul stopper 11, simple structure, convenient operation can improve maintenance efficiency.

In some examples of the invention, referring to fig. 1, 2 and 5, the access opening may be formed on a side of the first cover 31 remote from the frame 1, and the access opening may be substantially rectangular. When needs overhaul brake 11 or maintain, can pull down access cover 4 from access hole department, because the access hole is relative with brake 11, operating personnel can overhaul brake 11 through the access hole, has improved the convenience of overhauing and maintaining. After the overhaul is finished, the access cover 4 can be sealed at the access opening to ensure the sealing performance of the sound insulation cover 3.

In some embodiments of the present invention, as shown in fig. 5, the access opening is provided with an access cover mounting seat 5 protruding from the outer surface of the sound-proof cover 3, and the access cover mounting seat 5 is formed with an opening communicating with the access opening. The access cover 4 covers the opening. Therefore, by providing the access cover mounting seat 5 and providing the upper end of the access cover 4 with the turned-over edge 41 extending toward the center of the accommodating space 33, the screw fastener can be installed in the up-down direction, the access cover 4 can be very conveniently installed and detached while the reliable connection between the access cover 4 and the access cover mounting seat 5 is realized, and the assembling and disassembling efficiency can be improved.

In some examples of the invention, and with reference to fig. 5, the upper end of the access cover 4 is provided with a flange 41 extending toward the center of the accommodating space 33, the flange 41 being detachably connected to the top of the access cover mount 5 by a plurality of threaded fasteners. Two mounting holes penetrating the flange 41 in the thickness direction of the flange 41 may be formed in the flange 41, and two mounting holes may be formed in the top of the access cover mounting seat 5. During installation, the flange 41 can be lapped on the top of the access cover mounting seat 5, the mounting holes in the flange 41 and the mounting holes in the access cover mounting seat 5 are in one-to-one correspondence, and then two threaded fasteners such as bolts penetrate through the mounting holes in the flange 41 from top to bottom to be in threaded connection with the mounting holes in the access cover mounting seat 5. When the brake 11 needs to be overhauled, the threaded fastener is disengaged from the mounting hole to detach the access cover 4, and an operator can overhaul the brake 11 from the opening on the access cover mounting seat 5. So set up, greatly improved the convenience of operation, can further improve and install and remove efficiency.

In some embodiments of the present invention, as shown in fig. 5, an extending portion 313 extending horizontally away from the accommodating space 33 is disposed on the first cover 31, the access cover mounting seat 5 is disposed on the extending portion 313, an upward extending limiting portion 3131 is disposed on a side of the extending portion 313 away from the accommodating space 33, and a lower end of the access cover 4 abuts between the limiting portion 3131 and the access cover mounting seat 5. Therefore, by providing the above-mentioned limit portion 3131, a good limit function can be achieved, so that the sealing property between the access cover 4 and the access cover mounting seat 5 can be ensured, the air noise generated by the brake 11 is prevented from being transmitted from between the access cover 4 and the access cover mounting seat 5, and the structural stability of the entire bogie 100 can be improved.

In some examples of the present invention, as shown in fig. 3 and 5, the stopper 3131 may include a first sub-portion and a second sub-portion connected to each other, the first sub-portion and the second sub-portion may be perpendicular to each other, the first sub-portion being connected to the extension portion 313, and the second sub-portion extending upward to define the access cover 4 between the second sub-portion and the access cover mount 5. Therefore, the limiting part 3131 has a limiting effect, and is simple in structure and convenient to process.

In some embodiments of the present invention, referring to fig. 6, the upper end of the first lower cover 311 may be provided with second flange portions 3112, 3112 extending horizontally away from the receiving space 33, and the extension 313 may also be hermetically connected by a threaded fastener such as a bolt. In this way, the first lower cover 311 and the first upper cover 312 can be firmly connected and can be easily attached and detached.

In some embodiments of the present invention, as shown in fig. 4, the sound-insulating cover 3 includes a support layer 34, a damping layer 35, a sound-absorbing layer 36, and a sound-insulating layer 37, which are disposed in this order in a direction toward the center away from the accommodating space 33. Therefore, by arranging the supporting layer 34, the damping layer 35, the sound absorbing layer 36 and the sound insulating layer 37, the supporting layer 34 has higher rigidity and can play a good supporting role; the damping layer 35 can effectively prevent the support layer 34 from generating vibration, so that noise generated by the vibration of the sound insulation cover 3 in the running process of the railway vehicle 200 can be effectively prevented; the sound absorbing layer 36 and the sound insulating layer 37 provide the sound insulating cover 3 with good sound absorbing and insulating effects, and prevent air noise generated by the brake 11 from being transmitted from the housing space 33 to the inside or outside of the vehicle.

In some embodiments of the present invention, the support layer 34 may be a piece of glass fiber reinforced plastic or the like. So set up, make supporting layer 34 have certain rigidity, when can playing the supporting role, still have certain elasticity, easy to assemble. In addition, the supporting layer 34 has the characteristics of light weight, low cost, good fireproof performance and the like. Of course, the present invention is not limited thereto, and the support layer 34 may also be an aluminum alloy member, a stainless steel member, or the like.

In some embodiments of the present invention, the sound absorbing layer 36 may be a foam rubber layer. But is not limited thereto. Thus, the sound absorbing layer 36 can provide a good sound absorbing effect for air noise such as low-and-medium-frequency noise, thereby further reducing the noise inside the vehicle and the noise outside the vehicle.

In some embodiments of the present invention, the sound insulation layer 37 may be a heavy sound insulation layer 37 (referring to the sound insulation layer 37 made of a sound insulation material with a relatively heavy weight and a relatively high density), such as an EVA (ethylene-vinyl acetate copolymer, referring to "ethylene-vinyl acetate copolymer" and rubber-plastic foam made therefrom), or a nitrile rubber layer, etc. But is not limited thereto. So set up, puigging 3728 has fine syllable-dividing effect to make sound proof housing 3 can effectively insulate the air noise that stopper 11 produced.

In some embodiments of the invention, the second housing 32 is removably connected to the transverse stopper 2. For example, the upper end of the second housing 32 and the lateral stopper 2 may be sealingly connected by a threaded fastener such as a bolt. Thus, the second cover 32 can be easily attached and detached while ensuring the sealing reliability between the second cover and the lateral stopper 2.

A rail vehicle 200 according to an embodiment of the second aspect of the invention comprises a bogie 100 according to the above-described embodiment of the first aspect of the invention.

According to the railway vehicle 200, such as a straddle-type monorail vehicle, the bogie 100 can well isolate air noise generated by the brake 11, so that noise inside and outside the vehicle can be effectively reduced.

Other constructions and operations of the rail vehicle 200 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, 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", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, "the first feature", "the second feature", and "the third feature" may include one or more of the features.

In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.