Disc brake type wheel set, bogie and rail vehicle

Abstract

The invention relates to the technical field of railway vehicle wheel sets, and provides a disc brake type wheel set which comprises a transmission shaft, a pair of shaft sleeves, a shell, a movable disc, a fixed disc and wheels. The space formed by the shell and the shaft sleeve is a first braking area and a second braking area which are independent of each other, the movable disc is movably connected to the transmission shaft, the fixed disc is movably connected to the shell, and the movable disc and the fixed disc are arranged in the shell at intervals and suitable for acting in the axial direction of the shell. A first actuator is arranged in the first braking area, and a second actuator is arranged in the second braking area so as to generate axial thrust on the movable disc and the fixed disc. The invention further provides a bogie and a railway vehicle. The defects that in the prior art, a traditional rail vehicle braking device causes extra loads to the axle, high energy consumption and large inter-spring mass are brought to the rail vehicle, and the braking torque is insufficient in the wheel steering process are overcome, the lightweight design of the axle is achieved, the braking torque is sufficient when the vehicle steers, and the running safety of the rail vehicle is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicle wheels, and in particular to a disc brake type wheelset, a bogie and a rail vehicle. Background Art

[0002] With the development of science and technology, the demand for reducing the energy consumption of rail vehicles and improving the braking capacity of brake devices is getting higher and higher. Traditional rail vehicle brake devices generally use pneumatic clamps matched with brake wheel discs or brake shaft discs.

[0003] However, such a braking device will not only cause the pneumatic clamp to generate an additional unidirectional load in the vertical direction on the axle, thereby causing higher energy consumption and larger sprung mass for the rail vehicle, but also, when the wheels need to be braked during the turning process, since the axle turns with the wheels, the actual effective braking torque is a component of the original braking torque generated by the pneumatic clamp, resulting in insufficient braking torque, which can easily cause safety hazards to the rail vehicle. Summary of the invention

[0004] The present invention provides a disc brake type wheelset, a bogie and a rail vehicle, which are used to solve the defects of the conventional rail vehicle braking device in the prior art, that is, the extra load on the axle, the high energy consumption and the large spring mass of the rail vehicle, and the insufficient braking torque during the wheel turning process. The lightweight design of the axle is realized, and the braking torque is sufficient when the vehicle is turning, thereby ensuring the driving safety of the rail vehicle.

[0005] The present invention provides a disc brake type wheelset, comprising: a transmission shaft, a pair of shaft sleeves are sleeved on the outer periphery of the transmission shaft, the outer periphery of any shaft sleeve located at the end of the transmission shaft is rotatably connected to a wheel through a bearing, and any end of the transmission shaft is coaxially fixedly connected to the corresponding wheel through a coupling, so that the wheel and the transmission shaft rotate relative to the shaft sleeve along the axial direction;

[0006] A housing is fastened between a pair of the shaft sleeves, the housing is coaxially arranged around the transmission shaft, and the space formed by the housing and the shaft sleeve surrounding the transmission shaft is a braking area, the braking area includes a first braking area and a second braking area that are independent of each other, and a moving plate and a fixed plate are provided in the first braking area and the second braking area; the transmission shaft passes through the moving plate and the fixed plate, the moving plate is movably connected to the transmission shaft, the fixed plate is movably connected to the housing, the moving plate and the fixed plate are spaced apart from each other along the axial direction of the housing, and the moving plate and the fixed plate are both suitable for axial movement along the housing;

[0007] A first actuator is distributed in the first braking zone along the circumference of the shell, and the first actuator generates a first axial thrust along the axial direction of the shell, and the first axial thrust acts on the movable plate and the fixed plate located in the first braking zone, so that the adjacent movable plate and the fixed plate are close to each other and circumferential friction occurs, thereby generating a braking effect on the transmission shaft and the wheel; a second actuator is distributed in the second braking zone along the circumference of the shell, and the second actuator generates a second axial thrust along the axial direction of the shell, and the second axial thrust acts on the movable plate and the fixed plate located in the second braking zone, so that the adjacent movable plate and the fixed plate are close to each other and circumferential friction occurs, thereby generating a braking effect on the transmission shaft and the wheel; the first axial thrust is opposite to the second axial thrust, and both point to the cross-section of the radial center of the shell.

[0008] According to a disc brake type wheelset provided by the present invention, a disc hoop is sleeved on the transmission shaft, and the disc hoop has a plurality of first grooves spaced and evenly distributed along the outer circumference, and any of the first grooves extends along the axial direction of the disc hoop; any of the moving discs is provided with a plurality of first protrusions along the inner circumference corresponding to the plurality of first grooves, and any of the first protrusions is embedded in and movably connected to the corresponding first grooves; the disc hoop includes a first disc hoop and a second disc hoop, the first disc hoop is located in the first braking zone, the second disc hoop is located in the second braking zone, and the first disc hoop and the second disc hoop are symmetrically arranged with respect to the radial center cross section of the shell.

[0009] According to a disc brake wheelset provided by the present invention, the shell has a plurality of second grooves spaced and evenly distributed along the inner circumference, and any of the second grooves extends along the axial direction of the shell; any of the fixed plates has a plurality of second protrusions corresponding to the plurality of second grooves along the outer circumference, and any of the second protrusions is embedded in and movably connected to the corresponding second grooves.

[0010] According to a disc brake wheelset provided by the present invention, a plurality of heat dissipation grooves are provided at intervals along the outer circumference of the shell, any of the heat dissipation grooves extend along the axial direction of the shell, and any of the heat dissipation grooves penetrate the shell along the radial direction of the shell.

[0011] According to a disc brake type wheelset provided by the present invention, an end cover is fixedly connected between the housing and any one of the sleeves, and any one of the end covers abuts and seals between the corresponding sleeve and the housing; the first actuator and the second actuator are fixedly connected to the end face of the corresponding end cover close to the braking area.

[0012] According to a disc brake type wheelset provided by the present invention, a plurality of counterweights are integrally formed at the end of the shell 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 circumference of the shell, and the thickness direction of any of the counterweights is along the radial direction of the shell; any of the counterweights is provided with a notch along the axial direction of the shell, and the opening of any of the notches is along the direction away from the radial center cross section of the shell.

[0013] According to a disc brake wheelset provided by the present invention, a pair of mounting seats are arranged on the outer periphery of the housing, the mounting seats are arranged at intervals 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 type wheelset provided by the present invention, the end of the transmission shaft is connected to the wheel via an end gear coupling or a spline coupling.

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

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

[0017] The present invention provides a disc brake type wheelset, bogie and rail vehicle, which arrange brake discs for braking between wheels, use actuators with smaller volume and mass to generate axial thrust on the brake discs, and the brake discs are subjected to the axial thrust and are close to each other and fit to generate circumferential braking torque, and the first actuator and the second actuator can operate independently of each other, thereby solving various defects of traditional rail vehicle braking devices such as additional load on the axle due to the use of pneumatic clamps, higher energy consumption and larger spring mass for rail vehicles, and insufficient braking torque during wheel steering. Not only does it achieve a lightweight design of the axle, but it can also achieve braking action during both straight-line driving and steering of the rail vehicle, thereby ensuring sufficient braking torque during the steering process of the vehicle, thereby ensuring the driving safety of the rail vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

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

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

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

[0023] Figure 5 It is a structural schematic diagram of the housing of the present invention;

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

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

[0026] Figure 8 It is a cross-sectional view of the end of the transmission shaft of the present invention connected to the end gear coupling;

[0027] Fig. 9 It is a cross-sectional view of the end of the transmission shaft of the present invention connected to the spline coupling.

[0028] Reference numerals:

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

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Combine the following Figure 1-Figure 9The disc brake type wheelset of the present invention is described. The disc brake type wheelset of the present invention is suitable for various types of rail vehicles, such as motor vehicles, high-speed railways, trains, etc.

[0032] See also Figure 1 and Figure 2 An embodiment of the present invention provides a disc brake type wheelset, including a transmission shaft 1, a pair of shaft sleeves 2, a housing 3, a moving disc 4, a fixed disc 5 and a wheel 6.

[0033] Specifically, a pair of sleeves 2 are sleeved on the transmission shaft 1, and the outer periphery of any sleeve 2 at the end of the transmission shaft 1 is rotatably connected to the wheel 6 through a bearing, and any end of the transmission shaft 1 is coaxially fixedly connected to the corresponding wheel 6 through a coupling, so that the wheel 6 and the transmission shaft 1 can rotate relative to the sleeve 2 in the axial direction. The housing 3 is tightly connected between the pair of sleeves 2 and coaxially surrounded by the outer periphery of the transmission shaft 1, and the space surrounded by the housing 3 and the pair of sleeves 2 is a braking area 7; the braking area 7 includes a first braking area 71 and a second braking area 72 that are independent of each other, and the first braking area 71 and the second braking area 72 are symmetrically arranged with respect to the radial center cross section of the housing.

[0034] See also Figure 2 , the movable disc 4 and the fixed disc 5 are both arranged in the first braking area 71 and the second braking area 72 of the housing 3. The transmission shaft 1 passes through the movable disc 4 and the fixed disc 5, the movable disc 4 is movably connected to the transmission 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 from each other along the axial direction of the housing 3, and the movable disc 4 and the fixed disc 5 are both suitable for axial movement along the housing 3. It can be understood that the distance that the movable disc 4 and the fixed disc 5 can move in the housing 3 does not exceed the axial length of the first braking area 71 and the second braking area 72.

[0035] In some specific embodiments, the number of the moving disc 4 and the fixed disc 5 in each braking area 7 can be set to one or more respectively; in this embodiment, the number of the moving disc 4 and the fixed disc 5 in each braking area 7 is multiple, and the circumferential torque generated between any adjacent moving discs 4 and fixed discs 5 is the same. In this way, the number of friction pairs can 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 meet actual needs.

[0036] See also Figure 2In the first braking zone 71, a first actuator 8 is distributed along the circumferential direction of 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 movable disc 4 and the fixed disc 5 located in the first braking zone 71, so that the adjacent movable discs 4 and fixed discs 5 are close to each other and circumferential friction occurs, thereby generating a braking effect on the transmission shaft 1 and the wheel 6; in the second braking zone 72, a second actuator 9 is distributed along the circumferential direction of 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 movable disc 4 and the fixed disc 5 located in the second braking zone 72, so that the adjacent movable disc 4 and fixed disc 5 are close to each other and circumferential friction occurs, thereby generating a braking effect on the transmission shaft 1 and the wheel 6; the first axial thrust is opposite to the second axial thrust, and both point to the cross section of the radial center of the housing 3.

[0037] In this way, actuators are arranged in two independent braking areas 7. Even if the actuator in the braking area 7 on one side fails, the actuator in the braking area 7 on the other side will not be affected, and can still generate axial thrust on the movable plate 4 and the fixed plate 5 in the braking area 7 on that side, thereby greatly improving the reliability of the braking device and ensuring the driving safety of the rail vehicle.

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

[0039] In practical applications, the disc brake type wheelset of the embodiment of the present invention is provided with a pair of sleeves 2 on the transmission shaft 1, wherein the transmission shaft 1 and the wheel 6 are coaxially fixed by a coupling, the sleeve 2 is rotatably connected to the wheel 6 by a bearing, and a housing 3 is provided between the pair of sleeves 2; a first braking area 71 and a second braking area 72 which are independent of each other are provided in the housing 3, and a plurality of movable discs 4 and fixed discs 5 which are arranged at intervals from each other are provided in the first braking area 71 and the second braking area 72, wherein the movable disc 4 is movably connected to the transmission shaft 1, and the fixed disc 5 is movably connected to the housing 3, and in the first braking area A plurality of first actuators 8 are arranged circumferentially in the zone 71, and a plurality of second actuators 9 are arranged circumferentially in the second braking zone 72; the first actuators 8 and the second actuators 9 can respectively generate axial thrusts on the fixed plate 5 and the movable plate 4 in their respective braking zones 7, so that the adjacent movable plates 4 and fixed plates 5 are close to each other and closely fit along the axial direction of the housing 3 when the transmission shaft 1 rotates, thereby generating circumferential friction between the movable plate 4 and the fixed plate 5, and then applying a braking torque on the transmission shaft 1 in the opposite direction to the motion torque, thereby achieving a braking effect on the wheels 6 and the transmission shaft 1 when the rail vehicle turns.

[0040] The disc brake wheelset of the embodiment of the present invention, by arranging a brake disc for braking between the wheels 6, uses an actuator with a smaller volume and mass to generate an axial thrust on the brake disc, and the brake discs are subjected to the axial thrust and are close to each other and fit to generate a circumferential braking torque, and the first actuator 8 and the second actuator 9 can operate independently of each other, thereby solving various defects of traditional rail vehicle braking devices such as additional load on the axle due to the use of pneumatic clamps, higher energy consumption and larger spring mass for rail vehicles, and insufficient braking torque during wheel steering. Not only does it achieve a lightweight design of the axle, but it can also achieve braking action during both straight-line driving and steering of the rail vehicle, ensuring sufficient braking torque during the steering process of the vehicle, thereby ensuring the driving safety of the rail vehicle.

[0041] See also Figure 3 and Figure 4 The transmission shaft 1 is sleeved with a disc hoop 10, and the disc hoop 10 is spaced and evenly distributed with a plurality of first grooves 100 along the outer circumference, and any first groove 100 extends along the axial direction of the disc hoop 10; any movable disc 4 is provided with a plurality of first protrusions 40 along the inner circumference corresponding to the plurality of first grooves 100, and any first protrusion 40 is embedded and movably connected to the corresponding first grooves 100. In this way, the movable disc 4 forms a transition fit with the disc hoop 10 through the first protrusions 40, so that it can move axially in the housing 3 along the axial direction of the disc hoop 10.

[0042] In some specific embodiments, the disc hoop 10 forms an interference fit with the transmission shaft 1, and the diameter of the connection between the transmission shaft 1 and the disc hoop 10 is larger than the diameter of other parts of the transmission shaft 1; in other words, the transmission shaft 1 can be in the form of a stepped shaft, and the disc hoop 10 is fixed to the shoulder of the transmission shaft 1. Such a configuration facilitates the axial positioning and disassembly of the disc hoop 10 on the transmission shaft 1.

[0043] See also Figure 3 The disc hoop 10 includes a first disc hoop 101 located in the first braking area 71 and a second disc hoop 102 located in the second braking area 72, and the cross-sections of the first disc hoop 101 and the second disc hoop 102 are symmetrical about the radial center of the housing 3. In this way, multiple moving discs 4 can be installed in the first braking area 71 and the second braking area 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 the symmetrically arranged first disc hoop 101 and the second disc hoop 102 can make the circumferential braking torque evenly distributed in the axial direction of the transmission shaft 1, which helps to improve the service life of the transmission shaft 1.

[0044] See also Figure 5In some specific embodiments, an annular partition plate 11 is coaxially arranged at the cross section of the housing 3 at the radial center, and the first braking area 71 and the second braking area 72 are respectively located on the axial sides of the annular partition plate 11. In this way, the annular partition plate 11, which serves as the boundary between the first braking area 71 and the second braking area 72, is conducive to the disassembly and assembly of the first disc hoop 101 and the second disc hoop 102 in the housing 3, and effectively avoids the interference of the friction pairs in the first braking area 71 and the second braking area 72 during the braking process.

[0045] See also Figure 3 and Figure 5 , the housing 3 is provided with a plurality of second grooves 30 spaced and evenly distributed along the inner circumference, and any second groove 30 extends along the axial direction of the housing 3; any fixed plate 5 is provided with a plurality of second protrusions 50 corresponding to the plurality of second grooves 30 along the outer circumference, and any second protrusion 50 is embedded and movably connected to the corresponding second groove 30. Specifically, the length direction of any second groove 30 is along the axial direction of the housing 3, and the length of any second groove 30 is equal to the axial length of the housing 3; in this way, the fixed plate 5 forms a transition fit with the housing 3 through the second protrusions 50, so that it can move along the axial direction of the housing 3.

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

[0047] See also Figure 3 and Figure 5 The shell 3 is provided with a plurality of heat dissipation grooves 31 spaced and evenly spaced along the outer circumference, and any heat dissipation groove 31 extends along the axial direction of the shell 3, and any heat dissipation groove 31 penetrates the shell 3 along the radial direction of the shell 3. With such an arrangement, the shell 3 as a whole has a cage-like structure, which can effectively release the heat generated by the circumferential friction between the moving plate 4 and the fixed plate 5 during the braking process.

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

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

[0050] See also Figure 3 and Figure 5 A plurality of counterweight blocks 32 are integrally formed at the end of the shell 3 along the axial direction pointing to the radial center cross section of the shell 3. The counterweight blocks 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 block 32 is arranged along the radial direction of the shell 3; any counterweight block 32 is provided with 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] In this way, by providing a counterweight block 32 that is radially thickened on the shell 3, the radial bearing strength of the shell 3 can be effectively improved; opening a plurality of notches 33 on the shell 3 can reduce the overall weight of the shell 3 and help to further release the heat during the braking process.

[0052] See also Figure 6 The disc brake type wheelset of the embodiment of the present invention further includes a pair of end covers 12, any end cover 12 abuts and seals between any sleeve 2 and the housing 3, and any sleeve 2 and the corresponding end cover 12 are fixedly connected to the housing 3 by a bolt assembly. Specifically, the side of the end cover 12 close to the housing 3 is a flange structure, and the sleeve 2 and the housing 3 are fastened together by the flange structure of the end cover 12, which effectively prevents the sleeve 2 and the housing 3 from axial movement.

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

[0054] See also Figure 7 A pair of mounting seats 34 are provided at the middle of the outer periphery of the housing 3, and 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 type wheelset of the present invention further includes a traction rod 13, and the traction rod 13 has two annular ends 131, and the axial directions of the two annular ends 131 are parallel to the axial direction of the housing 3, and any of the annular ends 131 is provided with a rotating connector 132 for axial rotation. The rotating connector 132 and the tops of the two mounting seats 34 are provided with through holes along the radial direction of the housing 3, and the through holes of the rotating connector 132 at one end of the traction rod 13 are 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 arranged 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 such arrangement, if the braking torque is too large during the braking process, the frame can drive the housing 3 and the transmission shaft 1 to rotate in the same direction through the traction rod 13, thereby offsetting and balancing a part of the braking torque; if the braking torque is not large enough during the braking process, the frame can also drive the housing 3 and the transmission shaft 1 to rotate in the opposite direction through the traction rod 13, thereby increasing the braking torque. The overall braking capacity, practicality and versatility of the braking device are improved.

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

[0057] In summary, by adopting the above technical scheme, a housing 3 is arranged between the wheels 6, and a first braking zone 71 and a second braking zone 72 are arranged in the housing 3, and a plurality of movable discs 4 and fixed discs 5 arranged at intervals from each other are arranged in the first braking zone 71 and the second braking zone 72, wherein the movable disc 4 is movably connected to the transmission shaft 1, and the fixed disc 5 is movably connected to the housing 3, and a plurality of first actuators 8 are arranged circumferentially in the first braking zone 71, and a plurality of second actuators 9 are arranged circumferentially in the second braking zone 72, and the first actuators 8 and the second actuators 9 can respectively generate axial thrusts on the fixed discs 5 and the movable discs 4 in their respective braking zones 7, and a larger axial thrust is generated on the fixed discs 5 and the movable discs 4 through the actuator 6 with a smaller volume and mass, so that the adjacent movable discs 4 and fixed discs 5 are close to each other and closely fitted along the axial direction of the housing 3 when the transmission shaft 1 rotates, thereby generating circumferential friction between the movable disc 4 and the fixed disc 5, and achieving the braking effect on the wheels 6 and the transmission shaft 1 when the rail vehicle turns.

[0058] In the disc brake type wheelset of the embodiment of the present invention, the first actuator 8 and the second actuator 9 can operate independently of each other, the heat generated by the friction pair during braking is discharged through the heat dissipation groove 31, the number of brake discs can be changed to meet the needs of the actual situation, and the overall practicality and versatility of the device can be further improved through the traction rod 13. The various defects of the traditional rail vehicle braking device, such as the additional load on the axle due to the use of pneumatic clamps, the high energy consumption and large spring mass of the rail vehicle, and the insufficient braking torque during the wheel steering process, are solved. Not only the lightweight design of the axle is realized, but also the braking effect can be realized during the straight-line driving and steering process of the rail vehicle, ensuring that the vehicle has sufficient braking torque during the steering process, thereby ensuring the driving safety of the rail vehicle.

[0059] The embodiment of the present invention further provides a bogie, comprising the above-mentioned disc brake type wheelset, wherein the bogie is connected to the disc brake type wheelset in a transmission connection. The bogie of the embodiment of the present invention has all the advantages of the above-mentioned disc brake type wheelset, which will not be described in detail.

[0060] The embodiment of the present invention further provides a rail vehicle, comprising the above-mentioned disc brake type wheelset, or the above-mentioned bogie. The rail vehicle of the embodiment of the present invention can ensure sufficient braking torque through the disc brake type wheelset whether in straight-line driving or in the turning process, and has all the advantages of the above-mentioned disc brake type wheelset and the above-mentioned bogie, so it will not be described in detail.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions 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 transmission shaft, wherein a pair of sleeves are provided on the outer periphery of the transmission shaft, and the outer periphery of any sleeve located at the end of the transmission shaft is rotatably connected to a wheel via a bearing, and any end of the transmission shaft is coaxially fixedly connected to the corresponding wheel via a coupling, so that the wheel and the transmission shaft can rotate relative to the sleeve along the axial direction; A housing is fastened between the pair of sleeves, the housing is coaxially arranged around the transmission shaft, and the space formed by the housing and the sleeve surrounding the transmission shaft is a braking area, the braking area includes a first braking area and a second braking area that are independent of each other, and a moving plate and a fixed plate are provided in both the first braking area and the second braking area; The transmission shaft is provided with the movable plate and the fixed plate, the movable plate is movably connected to the transmission shaft, the fixed plate is movably connected to the housing, the movable plate and the fixed plate are arranged at intervals along the axial direction of the housing, and both the movable plate and the fixed plate are suitable for moving along the axial direction of the housing; A first actuator is distributed in the first braking area along the circumferential direction of the housing, and the first actuator generates a first axial thrust along the axial direction of the housing. The first axial thrust acts on the movable plate and the fixed plate located in the first braking area, so that the adjacent movable plate and the fixed plate are close to each other and generate circumferential friction, thereby generating a braking effect on the transmission shaft and the wheel; A second actuator is distributed in the second braking area along the circumferential direction of the housing, and the second actuator generates a second axial thrust along the axial direction of the housing, and the second axial thrust acts on the movable plate and the fixed plate located in the second braking area, so that the adjacent movable plate and the fixed plate are close to each other and generate circumferential friction, thereby generating a braking effect on the transmission shaft and the wheel; The first axial thrust and the second axial thrust are in opposite directions and both point to a cross section at the radial center of the housing.

2. The disc brake type wheelset according to claim 1, characterized in that: The transmission shaft is sleeved with a disc hoop, and the disc hoop is provided with a plurality of first grooves spaced and evenly distributed along the outer circumference, and any of the first grooves extends along the axial direction of the disc hoop; any of the movable discs is provided with a plurality of first protrusions corresponding to the plurality of first grooves along the inner circumference, and any of the first protrusions is embedded 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, the second disc hoop is located in the second braking area, and the first disc hoop and the second disc hoop are symmetrically arranged with respect to the radial center cross section of the shell.

3. The disc brake type wheelset according to claim 1, characterized in that: The shell has a plurality of second grooves spaced and evenly distributed along the inner circumference, and any of the second grooves extends along the axial direction of the shell; Any of the fixed plates is provided with a plurality of second protrusions along the outer circumference corresponding to the plurality of second grooves, and any of the second protrusions is embedded in and movably connected to the corresponding second groove.

4. The disc brake type wheelset according to claim 1, characterized in that: The shell is provided with a plurality of heat dissipation grooves spaced apart along the outer circumference, any of the heat dissipation grooves extends along the axial direction of the shell, and any of the heat dissipation grooves penetrates the shell along the radial direction of the shell.

5. The disc brake type wheelset according to claim 1, characterized in that: An end cover is fixedly connected between the housing and any one of the shaft sleeves, and any one of the end covers abuts against and seals between the corresponding shaft sleeve and the housing; The first actuator and the second actuator are both fixedly connected to the end surface of the corresponding end cover close to the braking area.

6. The disc brake type wheelset according to any one of claims 1 to 5, characterized in that: A plurality of balancing weights are integrally formed at the end of the shell along the axial direction pointing to the radial center cross section of the shell, the balancing weights are spaced apart from each other and evenly distributed on the outer periphery of the shell, and the thickness direction of any balancing weight is along the radial direction of the shell; Any of the counterweight blocks is provided with a notch along the axial direction of the shell, and the opening of any of the notches is along a direction away from the radial center cross section of the shell.

7. The disc brake type wheelset according to any one of claims 1 to 5, characterized in that: A pair of mounting seats are arranged on the outer periphery of the shell, the mounting seats are arranged at intervals along the axial direction of the shell, and the mounting seats are symmetrical with respect to the radial center cross section of the shell.

8. The disc brake type wheelset according to any one of claims 1 to 5, characterized in that: The end of the transmission shaft is connected to the wheel through an end gear coupling or a spline coupling.

9. A bogie, characterized in that: It comprises a disc brake type wheelset as described in any one of claims 1 to 8, wherein the bogie is transmission-connected to the disc brake type wheelset.

10. A rail vehicle, characterized in that: A disc brake type wheelset comprising any one of claims 1 to 8, or The bogie as claimed in claim 9.

Images