Disc brake wheelsets, bogies and rail vehicles

Abstract

This invention relates to the field of rail vehicle wheelset technology, providing a disc brake type wheelset, including a drive shaft, a pair of bushings, a housing, a moving disc, a fixed disc, and a wheel. The space formed by the housing and bushings is a first braking zone and a second braking zone, which are independent of each other. The moving disc is movably connected to the drive shaft, and the fixed disc is movably connected to the housing. The moving disc and the fixed disc are arranged alternately in the housing and are both adapted to move axially along the housing. A first actuator is provided in the first braking zone, and a second actuator is provided in the second braking zone to generate axial thrust on the moving disc and the fixed disc. This invention also provides a bogie and a rail vehicle. It solves the defects of traditional rail vehicle braking devices in the prior art, such as additional load on the axle, high energy consumption and large unsprung mass, and insufficient braking torque during wheel turning. It achieves a lightweight axle design and sufficient braking torque during vehicle turning, ensuring the driving safety of the rail vehicle.

Description

Technical Field

[0001] This invention relates to the technical field of rail vehicle wheels, and more particularly to a disc brake type wheelset, bogie, and rail vehicle. Background Technology

[0002] With the development of technology, the demand for reducing energy consumption and improving braking capacity of rail vehicles is increasing. Traditional rail vehicle braking devices generally use pneumatic calipers matched with brake discs or brake axle discs.

[0003] However, such braking devices not only generate additional unidirectional loads on the axle in the vertical direction due to the pneumatic clamps, resulting in higher energy consumption and larger unsprung mass for rail vehicles, but also cause insufficient braking torque when braking is required during wheel turning. This is because the axle turns with the wheel, and the actual effective braking torque is only a component of the original braking torque generated by the pneumatic clamps, which can easily cause safety hazards to rail vehicles. Summary of the Invention

[0004] This invention provides a disc brake wheelset, bogie, and rail vehicle to solve the defects of traditional rail vehicle braking devices in the prior art, such as additional load on the axle, high energy consumption and large inter-spring mass, and insufficient braking torque during wheel turning. It achieves lightweight axle design and sufficient braking torque when the vehicle turns, thus ensuring the driving safety of the rail vehicle.

[0005] The present invention provides a disc brake wheelset, comprising: a drive shaft, a pair of bushings sleeved on the outer periphery of the drive shaft, a wheel being rotatably connected to the outer periphery of each bushing located at the end of the drive shaft via a bearing, and each end of the drive shaft being coaxially and fixedly connected to the corresponding wheel via a coupling, thereby allowing the wheel and the drive shaft to rotate axially relative to the bushings;

[0006] A housing is fastened between a pair of bushings. The housing is coaxially arranged around the drive shaft, and the space formed by the housing and bushings surrounding the drive shaft is a braking zone. The braking zone includes a first braking zone and a second braking zone that are independent of each other. A moving plate and a fixed plate are provided in both the first braking zone and the second braking zone. The drive shaft passes through the moving plate and the fixed plate. The moving plate is movably connected to the drive shaft, and the fixed plate is movably connected to the housing. The moving plate and the fixed plate are arranged at intervals along the axial direction of the housing, and both the moving plate and the fixed plate are adapted to move along the axial direction of the housing.

[0007] In the first braking zone, a first actuator is distributed circumferentially along the housing. The first actuator generates a first axial thrust along the axial direction of the housing. The first axial thrust acts on the moving disc and the fixed disc located in the first braking zone, causing adjacent moving discs and the fixed disc to approach each other and generate circumferential friction, thereby braking the drive shaft and the wheel. In the second braking zone, a second actuator is distributed circumferentially along the housing. The second actuator generates a second axial thrust along the axial direction of the housing. The second axial thrust acts on the moving disc and the fixed disc located in the second braking zone, causing adjacent moving discs and the fixed disc to approach each other and generate circumferential friction, thereby braking the drive shaft and the wheel. The first axial thrust and the second axial thrust are in opposite directions and both point towards the cross-section of the radial center of the housing.

[0008] According to a disc brake wheelset provided by the present invention, a disc hoop is sleeved on the drive shaft. The disc hoop has a plurality of first grooves spaced apart and evenly distributed along its outer periphery, and each of the first grooves extends along the axial direction of the disc hoop. Each of the moving discs has a plurality of first protrusions corresponding to the plurality of first grooves along its inner periphery, and each of the first protrusions is embedded in and movably connected to the corresponding first groove. The disc hoop includes a first disc hoop and a second disc hoop. The first disc hoop is located in the first braking area, and the second disc hoop is located in the second braking area. The first disc hoop and the second disc hoop are symmetrically arranged about the radial center cross-section of the housing.

[0009] According to the present invention, a disc brake wheelset is provided in which a plurality of second grooves are spaced apart and evenly distributed along the inner circumference of the housing, and each of the second grooves extends along the axial direction of the housing; each of the fixed discs is provided with a plurality of second protrusions corresponding to the plurality of second grooves along the outer circumference, and each of the second protrusions is embedded in and movably connected to the corresponding second groove.

[0010] According to a disc brake wheelset provided by the present invention, the housing is provided with a plurality of heat dissipation grooves spaced apart along the outer periphery, each of the heat dissipation grooves extending along the axial direction of the housing, and each of the heat dissipation grooves penetrating the housing radially.

[0011] According to a disc brake wheelset provided by the present invention, an end cap is fixedly connected between the housing and any of the bushings, and each end cap abuts against and seals between the corresponding bushing and the housing; the first actuator and the second actuator are fixedly connected to the end face of the corresponding end cap near the braking area.

[0012] According to a disc brake wheelset provided by the present invention, a plurality of counterweights are integrally formed at the end of the housing along the axial direction pointing to the radial center cross-section of the housing. The counterweights are spaced apart from each other and evenly distributed on the outer periphery of the housing, and the thickness direction of any one of the counterweights is along the radial direction of the housing. Each of the counterweights has a notch along the axial direction of the housing, and the opening of any one of the notches is in a direction away from the radial center cross-section of the housing.

[0013] According to a disc brake wheelset provided by the present invention, a pair of mounting seats are provided on the outer periphery of the housing, the mounting seats are spaced apart along the axial direction of the housing, and the mounting seats are symmetrical about the radial center cross-section of the housing.

[0014] According to a disc brake wheelset provided by the present invention, the end of the drive shaft is connected to the wheel via an end face gear coupling or a spline coupling.

[0015] The present invention also provides a bogie, including the disc brake type wheelset, wherein the bogie is velocally connected to the disc brake type wheelset.

[0016] The present invention also provides a rail vehicle, including the disc brake type wheelset or the bogie.

[0017] This invention provides a disc brake wheelset, bogie, and rail vehicle. By installing a brake disc between the wheels, a small and lightweight actuator generates axial thrust on the brake disc. The brake disc, subjected to axial thrust, moves closer together to generate circumferential braking torque. Furthermore, the first and second actuators can operate independently. This invention solves various defects of traditional rail vehicle braking devices, such as additional load on the axle due to the use of pneumatic calipers, high energy consumption and large unsprung mass, and insufficient braking torque during wheel turning. It not only achieves lightweight axle design but also enables braking during both straight-line travel and turning of the rail vehicle, ensuring sufficient braking torque during turning and thus ensuring the safe operation of the rail vehicle. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is an axonometric view of the overall structure of the disc brake wheelset of the present invention;

[0020] Figure 2 This is an exploded view of the disc brake wheelset of the present invention;

[0021] Figure 3 This is an exploded view of a portion of the disc brake wheelset of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the disc hoop of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the housing of the present invention;

[0024] Figure 6 This is an exploded view of another part of the compound full-disc braking device of the present invention;

[0025] Figure 7 This is an exploded view of another part of the compound full-disc braking device of the present invention;

[0026] Figure 8 This is a cross-sectional view showing the connection between the end of the transmission shaft of the present invention and the end face gear coupling;

[0027] Figure 9 This is a cross-sectional view showing the connection between the end of the transmission shaft of the present invention and the spline coupling.

[0028] Figure label:

[0029] 1. Drive shaft; 2. Bushing; 3. Housing; 30. Second groove; 31. Heat dissipation groove; 311. First heat dissipation groove; 312. Second heat dissipation groove; 32. Counterweight; 33. Notch; 34. Mounting base; 4. Moving disc; 40. First protrusion; 5. Fixed disc; 50. Second protrusion; 6. Wheel; 7. Braking zone; 71. First braking zone; 72. Second braking zone; 8. First actuator; 9. Second actuator; 10. Disc clamp; 100. First groove; 101. First disc clamp; 102. Second disc clamp; 11. Annular partition plate; 12. End cap; 13. Traction rod; 131. Circular end; 132. Rotating connector; 14. End face gear coupling; 15. Spline coupling; 16. End face gear ring. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0031] The following is combined Figures 1-9This invention describes a disc brake wheelset. The disc brake wheelset of this invention is suitable for various types of rail vehicles, such as bullet trains, high-speed trains, and regular trains.

[0032] See Figure 1 and Figure 2 This invention provides a disc brake wheelset, including a drive shaft 1, a pair of bushings 2, a housing 3, a moving disc 4, a fixed disc 5, and a wheel 6.

[0033] Specifically, a pair of bushings 2 are both fitted onto the drive shaft 1. The outer periphery of each bushing 2 located at the end of the drive shaft 1 is rotatably connected to the wheel 6 via a bearing. Each end of the drive shaft 1 is coaxially and fixedly connected to the corresponding wheel 6 via a coupling, thereby allowing the wheel 6 and the drive shaft 1 to rotate axially relative to the bushings 2. The housing 3 is fastened between the pair of bushings 2 and coaxially surrounds the outer periphery of the drive shaft 1. The space enclosed by the housing 3 and the pair of bushings 2 around the drive shaft 1 is the braking zone 7. The braking zone 7 includes a first braking zone 71 and a second braking zone 72 that are independent of each other, and the first braking zone 71 and the second braking zone 72 are symmetrically arranged about the radial center cross-section of the housing.

[0034] See Figure 2 The movable disc 4 and the fixed disc 5 are both disposed in the first braking zone 71 and the second braking zone 72 of the housing 3. The drive shaft 1 passes through the movable disc 4 and the fixed disc 5. The movable disc 4 is movably connected to the drive shaft 1, and the fixed disc 5 is movably connected to the housing 3. The movable disc 4 and the fixed disc 5 are arranged at intervals along the axial direction of the housing 3, and both are adapted to move along the axial direction of the housing 3. It is understood that the distance that the movable disc 4 and the fixed disc 5 can move within the housing 3 does not exceed the axial length of the first braking zone 71 and the second braking zone 72.

[0035] In some specific embodiments, the number of moving discs 4 and fixed discs 5 in each braking zone 7 can be set to one or more; in this embodiment, the number of moving discs 4 and fixed discs 5 in each braking zone 7 is multiple, and the circumferential torque generated between any adjacent moving discs 4 and fixed discs 5 is the same. This arrangement allows the number of friction pairs to be changed by increasing or decreasing the number of moving discs 4 and fixed discs 5 according to different conditions such as the length, number of sections, and weight of the carriage, thereby proportionally changing the braking capacity of the device to adapt to actual needs.

[0036] See Figure 2In the first braking zone 71, a first actuator 8 is distributed circumferentially along the housing 3. The first actuator 8 generates a first axial thrust along the axial direction of the housing 3. The first axial thrust acts on the moving disc 4 and the fixed disc 5 located in the first braking zone 71, so that the adjacent moving disc 4 and the fixed disc 5 move closer to each other and circumferential friction occurs, thereby braking the drive shaft 1 and the wheel 6. In the second braking zone 72, a second actuator 9 is distributed circumferentially along the housing 3. The second actuator 9 generates a second axial thrust along the axial direction of the housing 3. The second axial thrust acts on the moving disc 4 and the fixed disc 5 located in the second braking zone 72, so that the adjacent moving disc 4 and the fixed disc 5 move closer to each other and circumferential friction occurs, thereby braking the drive shaft 1 and the wheel 6. The directions of the first axial thrust and the second axial thrust are opposite, and both point towards the cross section of the radial center of the housing 3.

[0037] With this configuration, actuators are installed in both independent braking zones 7. Even if the actuator in one braking zone 7 fails, the actuator in the other braking zone 7 will not be affected and will still be able to generate axial thrust on the moving disc 4 and fixed disc 5 of that braking zone 7. This greatly improves the reliability of the braking device and ensures the safe operation of the rail vehicle.

[0038] It is understandable that, in order to ensure a tight fit between the fixed plate 5 and the moving plate 4, the number of actuators is generally set to multiple. In some specific embodiments, the actuators can be electric actuators, pneumatic actuators, or hydraulic actuators; in this embodiment, the actuator is a hydraulic actuator, which achieves a large axial thrust with a small volume and mass, thus helping to improve braking efficiency.

[0039] In practical applications, the disc brake wheelset of this embodiment of the invention uses a pair of bushings 2 fitted onto a drive shaft 1. The drive shaft 1 and the wheel 6 are coaxially fixed by a coupling, and the bushings 2 are rotatably connected to the wheel 6 via bearings. A housing 3 is provided between the pair of bushings 2. The housing 3 contains an independent first braking zone 71 and a second braking zone 72. In both the first braking zone 71 and the second braking zone 72, multiple movable discs 4 and fixed discs 5 are arranged at intervals. The movable discs 4 are movably connected to the drive shaft 1, and the fixed discs 5 are movably connected to the housing 3. Multiple first actuators 8 are arranged circumferentially in zone 71, and multiple second actuators 9 are arranged circumferentially in zone 72. The first actuators 8 and the second actuators 9 can generate axial thrust on the fixed plate 5 and the moving plate 4 in their respective braking zones 7, so that the adjacent moving plate 4 and fixed plate 5 approach each other and fit tightly along the axial direction of the housing 3 when the drive shaft 1 rotates, thereby generating circumferential friction between the moving plate 4 and the fixed plate 5, and thus applying a braking torque to the drive shaft 1 in the opposite direction to the motion torque, thereby achieving the braking effect on the wheels 6 and the drive shaft 1 when the rail vehicle turns.

[0040] The disc brake wheelset of this invention, by setting a brake disc for braking between the wheels 6, uses a small-volume and low-mass actuator to generate axial thrust on the brake disc. The brake discs, subjected to axial thrust, move closer together and generate circumferential braking torque. Furthermore, the first actuator 8 and the second actuator 9 can operate independently of each other. This solves various defects of traditional rail vehicle braking devices, such as additional load on the axle due to the use of pneumatic calipers, high energy consumption and large inter-spring mass of the rail vehicle, and insufficient braking torque during wheel turning. It not only achieves lightweight axle design, but also enables braking during both straight-line travel and turning of the rail vehicle, ensuring sufficient braking torque during vehicle turning, thereby ensuring the safe operation of the rail vehicle.

[0041] See Figure 3 and Figure 4 A drive shaft 1 is fitted with a disc 10, and the disc 10 has a plurality of first grooves 100 spaced apart and evenly distributed along its outer circumference. Each of the first grooves 100 extends along the axial direction of the disc 10. Each movable disc 4 has a plurality of first protrusions 40 corresponding to the plurality of first grooves 100 along its inner circumference. Each of the first protrusions 40 is embedded in and movably connected to the corresponding first groove 100. With this arrangement, the movable disc 4 forms a transition fit with the disc 10 through the first protrusions 40, thereby enabling it to move axially within the housing 3 along the axial direction of the disc 10.

[0042] In some specific embodiments, the clamp 10 and the drive shaft 1 form an interference fit, and the diameter of the connection between the drive shaft 1 and the clamp 10 is larger than the diameter of other parts of the drive shaft 1; in other words, the drive shaft 1 can be in the form of a stepped shaft, and the clamp 10 is fixed to the shoulder of the drive shaft 1. This arrangement facilitates the axial positioning and disassembly of the clamp 10 on the drive shaft 1.

[0043] See Figure 3 The disc clamp 10 includes a first disc clamp 101 located in the first braking zone 71 and a second disc clamp 102 located in the second braking zone 72. The first disc clamp 101 and the second disc clamp 102 are symmetrical about the radial center of the housing 3. This arrangement allows multiple moving discs 4 to be installed in both the first braking zone 71 and the second braking zone 72, which not only increases the upper limit of the number of friction pairs and further improves the braking capacity of the device, but also ensures that the symmetrical arrangement of the first disc clamp 101 and the second disc clamp 102 can evenly distribute the circumferential braking torque along the axial direction of the drive shaft 1, which helps to improve the service life of the drive shaft 1.

[0044] See Figure 5In some specific embodiments, an annular partition plate 11 is coaxially arranged at the radial center section of the housing 3, with the first braking zone 71 and the second braking zone 72 located on opposite axial sides of the annular partition plate 11. This arrangement allows the annular partition plate 11, serving as the boundary between the first braking zone 71 and the second braking zone 72, to facilitate the separate assembly and disassembly of the first and second brake discs 101 and 102 within the housing 3, and effectively prevents interference between the friction pairs in the first and second braking zones 71 and 72 during braking.

[0045] See Figure 3 and Figure 5 The housing 3 has a plurality of second grooves 30 spaced apart and evenly distributed along its inner circumference, each second groove 30 extending along the axial direction of the housing 3; each fixed plate 5 has a plurality of second protrusions 50 corresponding to the plurality of second grooves 30 along its outer circumference, each second protrusion 50 being embedded in and movably connected to the corresponding second groove 30. Specifically, the length direction of each second groove 30 is along the axial direction of the housing 3, and the length of each second groove 30 is equal to the axial length of the housing 3; with this arrangement, the fixed plate 5 forms a transition fit with the housing 3 through the second protrusions 50, thereby enabling it to move along the axial direction of the housing 3.

[0046] It is understandable that when an annular partition plate 11 is provided inside the housing 3, any second groove 30 is symmetrically divided into two parts of equal length by the annular partition plate 11.

[0047] See Figure 3 and Figure 5 The housing 3 has a plurality of heat dissipation grooves 31 spaced apart and evenly distributed along its outer periphery. Each heat dissipation groove 31 extends along the axial direction of the housing 3 and penetrates the housing 3 radially. This arrangement gives the housing 3 a cage-like structure, which can effectively release the heat generated by the circumferential friction between the moving disc 4 and the fixed disc 5 during braking.

[0048] In some specific embodiments, the heat dissipation groove 31 includes a first heat dissipation groove 311 and a second heat dissipation groove 312. The first heat dissipation groove 311 and the second heat dissipation groove 312 have the same length and their length direction is along the circumference of the housing 3. The width of the first heat dissipation groove 311 is greater than the width of the second heat dissipation groove 312. The first heat dissipation groove 311 is formed in the housing 3 at the position of the second groove 30, and the first heat dissipation groove 311 and the second heat dissipation groove 312 are arranged alternately in the circumference of the housing 3.

[0049] In this embodiment, two sets of the first heat dissipation groove 311 and the second heat dissipation groove 312 are provided. The two sets of the first heat dissipation groove 311 are respectively connected to the first braking area 71 and the second braking area 72, and the two sets of the second heat dissipation groove 312 are also respectively connected to the first braking area 71 and the second braking area 72.

[0050] See Figure 3 and Figure 5 The end of the shell 3 is integrally formed with a plurality of counterweights 32 along the axial direction pointing to the radial center cross section of the shell 3. The counterweights 32 are spaced apart from each other and evenly distributed on the outer periphery of the shell 3, and the thickness direction of any counterweight 32 is arranged along the radial direction of the shell 3. Each counterweight 32 has a notch 33 along the axial direction of the shell 3, and the opening of any notch 33 is along the direction away from the radial center cross section of the shell 3.

[0051] With this configuration, by setting a counterweight 32 that is radially thickened on the housing 3, the radial load-bearing strength of the housing 3 can be effectively improved; by opening multiple notches 33 on the housing 3, the overall weight of the housing 3 can be reduced, and it also helps to further release the heat during the braking process.

[0052] See Figure 6 The disc brake wheelset of this embodiment also includes a pair of end caps 12. Each end cap 12 abuts against and seals between each bushing 2 and the housing 3. Each bushing 2 and its corresponding end cap 12 are fixedly connected to the housing 3 by a bolt assembly. Specifically, the side of the end cap 12 closest to the housing 3 has a flange structure. The bushing 2 and the housing 3 are fastened together by the flange structure of the end cap 12, effectively preventing axial movement of the bushing 2 and the housing 3.

[0053] See Figure 6 In some specific embodiments, the first actuator 8 and the second actuator 9 are both surrounded and fixedly connected to the end face of the corresponding end cover 12 near the corresponding braking area 7, and the first actuator 8 and the second actuator 9 are both embedded in the mounting hole opened along the axial direction of the end cover 12 through their own external thread structure.

[0054] See Figure 7 A pair of mounting seats 34 are provided at the center of the outer periphery of the housing 3. The pair of mounting seats 34 are spaced apart along the axial direction of the housing 3, and the mounting seats 34 are symmetrical about the radial center cross-section of the housing 3. In some specific embodiments, the disc brake wheelset of the present invention also includes a traction rod 13. The traction rod 13 has two annular ends 131, the axial direction of which is parallel to the axial direction of the housing 3. Each annular end 131 is rotatably connected to a rotating connector 132 along the axial direction. The rotating connector 132 and the top of the two mounting seats 34 are provided with through holes along the radial direction of the housing 3. The through hole of the rotating connector 132 at one end of the traction rod 13 is fixed to the through holes of the two mounting seats 34 by fasteners, so that the corresponding annular end 131 of the traction rod 13 is rotatably disposed between the two mounting seats 34, and the other end of the traction rod 13 is rotatably connected to the frame of the rail vehicle.

[0055] With this configuration, if the braking torque is too high during braking, the frame can rotate the housing 3 and the drive shaft 1 in the same direction via the traction rod 13, thereby offsetting and balancing part of the braking torque. If the braking torque is insufficient during braking, the frame can also rotate the housing 3 and the drive shaft 1 in the opposite direction via the traction rod 13, thereby increasing the braking torque. This improves the overall braking capacity, practicality, and versatility of the braking system.

[0056] See Figure 8 and Figure 9 In some specific embodiments, the end of the drive shaft 1 is connected to the wheel 6 via a face gear coupling 14 or a spline coupling 15. When a face gear coupling 14 is used, the end of the drive shaft 1 has a face gear ring 16 coaxially arranged with the drive shaft 1. The drive shaft 1 meshes with the gear teeth of the face gear coupling 14 through the face gear ring 16, thereby achieving the effect of fixing the drive shaft 1 to the face gear coupling 14. When a spline coupling 15 is used, an external spline (not shown in the figure) is provided on the outer circumference of the end of the drive shaft 1. The drive shaft 1 forms a spline connection with the internal spline of the spline coupling 15 through the external spline, thereby achieving the effect of fixing the drive shaft 1 to the spline coupling 15.

[0057] In summary, by adopting the above technical solution, a housing 3 is set between the wheels 6, and an independent first braking zone 71 and a second braking zone 72 are set inside the housing 3. Multiple moving discs 4 and fixed discs 5 are arranged at intervals in both the first braking zone 71 and the second braking zone 72. The moving discs 4 are movably connected to the drive shaft 1, and the fixed discs 5 are movably connected to the housing 3. Multiple first actuators 8 are arranged circumferentially in the first braking zone 71, and multiple second actuators 9 are arranged circumferentially in the second braking zone 72. The first actuators 8 and the second actuators 9 can generate axial thrust on the fixed discs 5 and moving discs 4 in their respective braking zones 7. The relatively small size and mass of the actuators 6 generate a large axial thrust on the fixed discs 5 and moving discs 4, so that the adjacent moving discs 4 and fixed discs 5 move closer to each other and fit tightly together along the axial direction of the housing 3 when the drive shaft 1 rotates, thereby generating circumferential friction between the moving discs 4 and fixed discs 5, and achieving the braking effect on the wheels 6 and drive shaft 1 when the rail vehicle turns.

[0058] In this embodiment of the disc brake wheelset, the first actuator 8 and the second actuator 9 can operate independently. Heat generated by the friction pair during braking is dissipated through the heat dissipation groove 31. The number of brake discs can be changed to adapt to actual needs, and the overall practicality and versatility of the device can be further improved through the traction rod 13. This invention solves various defects of traditional rail vehicle braking devices, such as additional load on the axle due to the use of pneumatic calipers, high energy consumption and large unsprung mass, and insufficient braking torque during wheel turning. It not only achieves lightweight axle design but also provides braking during both straight-line travel and turning, ensuring sufficient braking torque during vehicle turning and thus ensuring the safe operation of the rail vehicle.

[0059] Embodiments of the present invention also provide a bogie including the aforementioned disc brake wheelset, wherein the bogie is connected to the disc brake wheelset via a transmission connection. The bogie of the present invention possesses all the advantages of the aforementioned disc brake wheelset, which will not be elaborated further.

[0060] Embodiments of the present invention also provide a rail vehicle, including the aforementioned disc brake wheelset or the aforementioned bogie. The rail vehicle of the present invention, whether traveling in a straight line or turning, can ensure sufficient braking torque through the disc brake wheelset and possesses all the advantages of the aforementioned disc brake wheelset and bogie, therefore, further details are omitted.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A disc brake type wheelset, characterized in that, include: A drive shaft is provided with a pair of bushings on its outer circumference. Each bushing located at the end of the drive shaft is rotatably connected to a wheel via a bearing. Each end of the drive shaft is coaxially and fixedly connected to the corresponding wheel via a coupling, thereby allowing the wheel and the drive shaft to rotate axially relative to the bushings. A housing is fastened between a pair of bushings. The housing is coaxially arranged around the transmission shaft, and the space formed by the housing and the bushings surrounding the transmission shaft is a braking zone. The braking zone includes a first braking zone and a second braking zone that are independent of each other, and a moving plate and a fixed plate are provided in both the first braking zone and the second braking zone. The drive shaft passes through the moving disk and the fixed disk. The moving disk is movably connected to the drive shaft, and the fixed disk is movably connected to the housing. The moving disk and the fixed disk are arranged at intervals along the axial direction of the housing, and both the moving disk and the fixed disk are adapted to move along the axial direction of the housing. A first actuator is distributed along the circumference of the housing in the first braking zone. The first actuator generates a first axial thrust along the axial direction of the housing. The first axial thrust acts on the moving disc and the fixed disc located in the first braking zone, so that the adjacent moving disc and the fixed disc move closer to each other and circumferential friction occurs, thereby generating a braking effect on the drive shaft and the wheel. A second actuator is distributed circumferentially along the housing in the second braking zone. The second actuator generates a second axial thrust along the axial direction of the housing. The second axial thrust acts on the moving disc and the fixed disc located in the second braking zone, so that the adjacent moving disc and the fixed disc move closer to each other and circumferential friction occurs, thereby generating a braking effect on the drive shaft and the wheel. The first axial thrust and the second axial thrust are in opposite directions and both point towards the cross section at the radial center of the housing.

2. The disc brake wheelset according to claim 1, characterized in that, The drive shaft is fitted with a disc hoop, and the disc hoop has a plurality of first grooves spaced apart and evenly distributed along its outer periphery. Each of the first grooves extends along the axial direction of the disc hoop. Each of the moving discs has a plurality of first protrusions arranged along its inner periphery corresponding to the plurality of first grooves. Each of the first protrusions is embedded in and movably connected to the corresponding first groove. The disc clamp includes a first disc clamp and a second disc clamp. The first disc clamp is located in the first braking zone, and the second disc clamp is located in the second braking zone. The first disc clamp and the second disc clamp are symmetrically arranged about the radial center cross-section of the housing.

3. The disc brake wheelset according to claim 1, characterized in that, The shell has a plurality of second grooves spaced apart and evenly distributed along its inner circumference, and each of the second grooves extends along the axial direction of the shell. Each of the aforementioned fixed plates has a plurality of second protrusions arranged along its outer circumference corresponding to a plurality of the second grooves, and each of the second protrusions is embedded in and movably connected to the corresponding second groove.

4. The disc brake wheelset according to claim 1, characterized in that, The housing is provided with a plurality of heat dissipation grooves spaced apart along its outer periphery. Each heat dissipation groove extends along the axial direction of the housing and penetrates the housing radially.

5. The disc brake wheelset according to claim 1, characterized in that, An end cap is fixedly connected between the housing and any of the bushings, and each end cap abuts against and seals between the corresponding bushing and the housing. Both the first actuator and the second actuator are fixedly connected to the end face of the corresponding end cap near the braking area.

6. The disc brake wheelset according to any one of claims 1-5, characterized in that, The end of the shell has a plurality of counterweights integrally formed along the axial direction pointing to the radial center cross section of the shell. The counterweights are spaced apart from each other and evenly distributed on the outer periphery of the shell, and the thickness direction of any one of the counterweights is along the radial direction of the shell. Each of the counterweights has a notch along the axial direction of the housing, and the opening of each notch is in a direction away from the radial center cross-section of the housing.

7. The disc brake wheelset according to any one of claims 1-5, characterized in that, A pair of mounting seats are provided on the outer periphery of the housing. The mounting seats are spaced apart along the axial direction of the housing and are symmetrical about the radial center cross-section of the housing.

8. The disc brake wheelset according to any one of claims 1-5, characterized in that, The end of the drive shaft is connected to the wheel via a face gear coupling or a spline coupling.

9. A bogie, characterized in that, Includes a disc brake wheelset as described in any one of claims 1-8, wherein the bogie is drive-connected to the disc brake wheelset.

10. A rail vehicle, characterized in that, Including disc brake wheelsets as described in any one of claims 1-8, or The bogie as described in claim 9.

Images