Disc brake systems, methods, wheel drive systems, and rail vehicles

Abstract

This invention relates to the field of braking system technology, providing a full-disc braking device, method, wheel drive system, and rail vehicle. The full-disc braking device includes a housing, a hub, a stationary disc, a moving disc, and a brake cylinder. The housing is adapted to be fixedly connected to the outer casing of a motor. The hub is rotatably disposed within the housing and fixedly connected to the non-output end of the motor's shaft. The stationary disc is axially slidably connected to the housing and forms an axial rotation limit with the housing. The moving disc is disposed on the hub and adapted to rotate synchronously with the hub. The brake cylinder is used to drive the stationary disc and the moving disc to engage in braking. This invention employs a full-disc braking type, installed at the non-output end of the motor's shaft, and is not directly connected to the axle. Therefore, it does not impose an additional braking bending moment on the axle, which is beneficial for lightweight axle design. The axle does not need to be equipped with a brake disc or wheel disc, significantly reducing unsprung mass and contributing to improved dynamic performance.

Description

Technical Field

[0001] This invention relates to the field of braking system technology, and more particularly to a full disc brake device, method, wheel drive system, and rail vehicle. Background Technology

[0002] Traditional drive motors, gearboxes, and braking systems are designed independently, and therefore each occupies a separate structural space, resulting in greater weight, larger size, higher energy consumption, and higher cost.

[0003] As people's demands for ride comfort and vehicle energy efficiency increase, the need for lightweight rail vehicle bogies is growing. Traditional EMU or subway bogies typically use pneumatic calipers paired with brake discs or brake axle discs. The calipers and discs are quite heavy; each brake disc weighs approximately 110 kg, and each caliper averages about 90 kg. If each bogie is equipped with four calipers and four brake discs, the weight will approach 800 kg. This heavy brake discs and calipers result in higher energy consumption and increase unsprung and insprung weight, negatively impacting vehicle dynamics. Summary of the Invention

[0004] This invention provides a full-disc braking device, method, wheel drive system, and rail vehicle to solve the defect in the prior art where the design of the braking device requires a large braking structure, resulting in increased unsprung and in-sprung weight.

[0005] This invention provides a full-disc braking device, comprising:

[0006] Housing, suitable for fixed connection with the motor housing;

[0007] A hub is rotatably disposed within the housing, and the hub is fixedly connected to the non-output end of the motor shaft;

[0008] The stationary disc is axially slidably connected to the housing and forms an axial rotation limit with the housing;

[0009] A movable disc, disposed on the disc hub, adapted to rotate synchronously with the disc hub; and a brake cylinder, the brake cylinder being used to drive the stationary disc and the movable disc to engage in braking.

[0010] According to a full-disc braking device provided by the present invention, the end of the housing is fixedly connected to the outer casing of the motor via a flange structure, and a heat insulation gap is formed between the end plate of the housing and the outer casing of the motor.

[0011] According to a full-disc braking device provided by the present invention, at least one of the stationary disc and the moving disc is provided in two or more, and the stationary disc and the moving disc are arranged alternately.

[0012] A full-disc braking device provided by the present invention,

[0013] The inner side of the housing is provided with a first support boss, which extends along the axial direction of the housing.

[0014] The stationary disc is sleeved on the outside of the hub and spaced apart from the hub. The outside of the stationary disc is provided with an outer mating groove, which slides into the first support boss.

[0015] According to a full-disc braking device provided by the present invention, the first support boss is provided with a first ventilation groove, the first ventilation groove extends along the axial direction of the housing and penetrates the first support boss and the side wall of the housing along the radial direction of the housing.

[0016] According to a full-disc braking device provided by the present invention, a second support boss is provided on the outer side of the disc hub, and the second support boss extends along the axial direction of the disc hub.

[0017] The inner side of the moving plate is provided with an inner mating groove. The moving plate is sleeved on the outer side of the hub, and the inner mating groove of the moving plate is slidably engaged with the second support boss. The outer side of the moving plate is spaced apart from the inner wall of the housing.

[0018] According to a full-disc braking device provided by the present invention, the second support boss is provided with a second ventilation groove, the second ventilation groove extends along the axial direction of the disc hub, and the second ventilation groove has openings at both ends along the axial direction of the disc hub.

[0019] According to the present invention, a full-disc braking device is provided, wherein the disc hub comprises:

[0020] The mounting cylinder is used to connect with the moving disk;

[0021] An external connection portion, located inside the mounting cylinder, is used to connect to the non-output end of the motor shaft; and

[0022] A connecting spoke is provided, with one end connected to the inner side of the mounting cylinder and the other end connected to the outer part. The connecting spoke is a tapered structure whose radial dimension gradually decreases from the end connected to the mounting cylinder to the end connected to the outer part.

[0023] According to the present invention, a full-disc braking device is provided, wherein the external part is bolted to the shaft of the motor and is splined.

[0024] The present invention also provides a wheel drive system, including a motor, a gearbox, an axle, and the aforementioned full disc brake device;

[0025] The motor includes a rotating shaft, the output end of which is connected to the axle via the gearbox, and the non-output end of which is connected to the full disc brake device.

[0026] The axle is adapted to connect wheels.

[0027] According to a wheel drive system provided by the present invention, a bushing is further included, the bushing being sleeved on the outside of the axle; one side of the motor is elastically connected to the bushing.

[0028] The present invention also provides a rail vehicle including the above-described full disc brake device, or including the above-described wheel drive system.

[0029] The present invention also provides a braking method using the above-described full-disc brake device, comprising:

[0030] A braking torque is applied to the non-output end of the motor shaft. The braking torque is transmitted to the gearbox through the motor shaft, amplified by the gearbox, and then applied to the axle.

[0031] The full-disc braking device, method, wheel drive system, and rail vehicle provided by this invention adopt a full-disc braking type, which is installed at the non-output end of the motor shaft and is not directly connected to the axle. Therefore, there is no additional braking bending moment on the axle, which is beneficial for lightweight axle design. The axle does not need to be equipped with a brake disc or wheel disc, and the unsprung mass is greatly reduced, which helps to improve dynamic performance. Attached Figure Description

[0032] 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.

[0033] Figure 1 This is a perspective view of a full-disc braking device provided by the present invention in conjunction with a motor;

[0034] Figure 2 This is a cross-sectional view of a full-disc braking device provided by the present invention in the state of being used with a motor;

[0035] Figure 3 This is one of the schematic diagrams showing the housing structure in a full-disc braking device provided by the present invention;

[0036] Figure 4 This is the second schematic diagram showing the housing structure in a full-disc braking device provided by the present invention;

[0037] Figure 5This is an exploded view of a full-disc braking device provided by the present invention;

[0038] Figure 6 This is a schematic diagram illustrating the cooperation structure between the disc hub and the motor in a full-disc braking device provided by the present invention;

[0039] Figure 7 This is a perspective view showing the disc hub structure in a full-disc braking device provided by the present invention;

[0040] Figure 8 This is a cross-sectional view showing the disc hub structure in a full-disc braking device provided by the present invention;

[0041] Figure 9 This is a schematic diagram of the structure of a wheel drive system provided by the present invention;

[0042] Figure label:

[0043] 100. Shell; 101. First support boss; 102. First ventilation slot; 103. Hole; 104. End plate; 105. Flange; 106. Rib plate; 107. Annular rib; 108. Ventilation hole; 109. End cap;

[0044] 200. Hub; 201. Second support boss; 202. Second ventilation slot; 203. Mounting cylinder; 204. External connection; 205. Connecting spoke; 206. Through hole; 207. Spline;

[0045] 300, stationary disc; 301, external mating groove;

[0046] 400, Moving disc; 401, Internal mating groove;

[0047] 500, Brake cylinder;

[0048] 600. Motor; 601. Shaft; 602. Vertical boom;

[0049] 700, Gearbox;

[0050] 800, bushing; 801, mounting ring;

[0051] 900. Wheel. Detailed Implementation

[0052] 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.

[0053] The following is combined Figures 1 to 8 A full-disc braking device according to an embodiment of the present invention is described.

[0054] like Figure 1 and Figure 2 As shown, the full-disc braking device of this embodiment includes a housing 100, a disc hub 200, a stationary disc 300, a moving disc 400, and a brake cylinder 500. The housing 100 is adapted to be fixedly connected to the housing of a motor 600; the disc hub 200 is rotatably disposed within the housing 100, and the disc hub 200 is fixedly connected to the non-output end of the rotating shaft 601 of the motor 600; the stationary disc 300 is axially slidably connected to the housing 100, and forms an axial rotation limit with the housing 100; the moving disc 400 is disposed on the disc hub 200 and is adapted to rotate synchronously with the disc hub 200; the brake cylinder 500 is used to drive the stationary disc 300 and the moving disc 400 to contact and engage for braking.

[0055] According to an embodiment of the full-disc braking device of the present invention, the stationary disc 300 does not rotate under the limitation of the housing 100, while the moving disc 400 can rotate synchronously with the disc hub 200 and the rotating shaft 601 of the motor 600. When the brake cylinder 500 drives the stationary disc 300 and the moving disc 400 to engage, frictional resistance is generated between the stationary disc 300 and the moving disc 400, thereby applying braking torque to the disc hub 200 and the motor 600. This braking torque can be further transmitted to the axle through the rotating shaft 601 of the motor 600 to achieve vehicle braking. This braking structure can replace the traditional braking form of brake wheel disc and brake axle disc, reducing the pressure of the braking structure on the axle and achieving weight reduction. In addition, since the braking torque is applied to the rotating shaft 601 of the motor 600, the gearbox 700 between the rotating shaft 601 of the motor 600 and the axle can amplify the braking torque, achieving parking braking with a smaller braking torque, which helps to reduce the strength requirements of the braking device and further achieve weight reduction.

[0056] Combination Figure 3 and Figure 4 Optionally, the housing 100 adopts a cage-like structure. Specifically, the housing 100 is cylindrical or approximately cylindrical in shape, and at least one of the sidewalls and end plates 104 of the housing 100 is provided with perforated holes 103. Multiple perforated holes 103 are spaced apart around the circumference of the housing 100. Preferably, multiple perforated holes 103 are provided on the sidewalls of the housing 100, and these perforated holes 103 can be of any shape, such as triangular, rectangular, or trapezoidal. This can increase the heat dissipation capacity of the full-disc brake device and reduce the overall weight of the full-disc brake device.

[0057] In some embodiments of the present invention, the end of the housing 100 is fixedly connected to the outer casing of the motor 600 by a flange structure, and a heat insulation gap is formed between the end plate 104 of the housing 100 and the outer casing of the motor 600.

[0058] Specifically, a flange 105 is provided at the end of the housing 100. The flange 105 can be located on the radially outer side or the radially inner side of the housing 100. The side wall of the flange 105 that contacts the housing of the motor 600 is located on the outer side of the end plate 104 of the housing 100 in the axial direction of the housing 100. Thus, when the flange 105 contacts the housing of the motor 600, a gap can be formed between the end plate 104 of the housing 100 and the housing of the motor 600.

[0059] Optionally, the end plate 104 of the housing 100 is provided with reinforcing ribs, which are connected to the flange 105 to increase the structural strength of the end plate 104. For example, as shown in the figure, the reinforcing ribs include a plurality of circumferentially arranged stiffening plates 106 and an annular rib 107 located in the middle of the end plate 104, and the end plate 104, flange 105 and reinforcing ribs form a plurality of grooves.

[0060] In this embodiment, the housing 100 and the motor 600 are connected by a flange structure, which has the advantage of convenient disassembly and assembly. Furthermore, the gap formed between the end plate 104 of the housing 100 and the outer shell of the motor 600 can block the direct transfer of braking heat energy to the motor 600, thus preventing the motor 600 from overheating.

[0061] In some embodiments of the present invention, the end plate 104 of the housing 100 is provided with a ventilation hole 108, which connects the gap formed between the end plate 104 of the housing 100 and the outer shell of the motor 600 and the inner cavity of the housing 100.

[0062] Optionally, multiple ventilation holes 108 are provided, and the multiple ventilation holes 108 are evenly arranged along the circumference of the housing 100.

[0063] In this embodiment, by providing ventilation holes 108, the air from the motor 600 air duct can be effectively introduced into the brake through the ventilation holes 108 to cool the moving disc 400 and stationary disc 300 in the full disc brake device, thus preventing the temperature inside the full disc brake device from becoming too high.

[0064] See Figure 5 In some embodiments of the present invention, an end cover 109 is provided at the end of the housing 100 away from the motor 600. The end cover 109 is a detachable structure, for example, it is installed by means of bolt fixing.

[0065] Optionally, the brake cylinder 500 is disposed on the end cover 109.

[0066] See also Figure 5 In some embodiments of the present invention, at least one of the stationary disk 300 and the moving disk 400 is provided in more than two forms, and the stationary disk 300 and the moving disk 400 are arranged alternately.

[0067] Optionally, there may be two or more stationary disks 300 and moving disks 400. For example, there may be three stationary disks 300 and two moving disks 400, with the moving disks 400 positioned between adjacent stationary disks 300.

[0068] It is understandable that the stationary disc 300 and the moving disc 400 can slide along the axial direction of the housing 100. When a gap is formed between the stationary disc 300 and the moving disc 400, the moving disc 400 can rotate freely along with the disc hub 200 and the rotating shaft 601 of the motor 600. When the brake cylinder 500 presses the stationary disc 300 and the moving disc 400 along the axial direction of the housing 100, the stationary disc 300 and the moving disc 400 come into contact and rub against each other. Thus, the stationary disc 300 can apply braking force to the moving disc 400.

[0069] Combination Figure 3 and Figure 5 In some embodiments of the present invention, a first support boss 101 is provided on the inner side of the housing 100. The first support boss 101 extends along the axial direction of the housing 100 and has the same width at all locations. The stationary disc 300 is sleeved on the outer side of the disc hub 200 and is spaced apart from the disc hub 200. An outer mating groove 301 is provided on the outer side of the stationary disc 300, and the outer mating groove 301 slides and engages with the first support boss 101.

[0070] Optionally, the width of the outer mating groove 301 is the same as the width of the first support boss 101 to prevent the stationary plate 300 from shaking under the drive of the moving plate 400.

[0071] Optionally, multiple first support bosses 101 are evenly arranged along the circumference of the housing 100, and multiple outer mating grooves 301 of the stationary disk 300 are evenly arranged along the circumference of the stationary disk 300. The multiple first support bosses 101 and the multiple outer mating grooves 301 are correspondingly mated. This can increase the mating strength between the stationary disk 300 and the housing 100, and make the force on the stationary disk 300 and the moving disk 400 uniform.

[0072] In this embodiment, the thickness of the first support boss 101 is greater than or equal to the depth of the outer mating groove 301. Preferably, the thickness of the first support boss 101 is greater than the depth of the outer mating groove 301, so that a gap is formed between the outer side wall of the stationary plate 300 and the inner side wall of the housing 100, which enhances the ventilation capacity and makes the sliding of the stationary plate 300 smoother.

[0073] Optionally, the first support boss 101 is provided with a first ventilation groove 102, which extends along the axial direction of the housing 100 and penetrates the first support boss 101 and the side wall of the housing 100 along the radial direction of the housing 100. The first ventilation groove 102 facilitates air circulation inside and outside the housing 100 and helps to reduce the weight of the housing 100.

[0074] Combination Figure 7 and Figure 8 In some embodiments of the present invention, the hub 200 includes a mounting cylinder 203, an outer connection 204, and a connecting portion. The mounting cylinder 203 is used to connect with the moving disk 400; the outer connection 204 is located inside the mounting cylinder 203 and is used to connect with the non-output end of the rotating shaft 601 of the motor 600; one end of the connecting spoke 205 is connected to the inner side of the mounting cylinder 203, and the other end is connected to the outer connection 204. The connecting spoke 205 is a tapered structure with a radial dimension that gradually decreases from the end connected to the mounting cylinder 203 to the end connected to the outer connection 204.

[0075] Specifically, both the mounting cylinder 203 and the outer connecting part 204 are cylindrical structures. The diameter of the mounting cylinder 203 is larger than the diameter of the outer connecting part 204. The mounting cylinder 203, the outer connecting part 204, and the housing 100 are coaxial. The mounting cylinder 203 is located inside the housing 100. A transition hole is provided in the middle of the end plate 104 of the housing 100 near the motor 600. The outer connecting part 204 passes through this transition hole and is suitable for circumferential rotation within the transition hole. The end of the outer connecting part 204 located outside the housing 100 is suitable for connecting to the rotating shaft 601 of the motor 600. The connecting spoke 205 is a conical cylindrical structure. The axis of the connecting spoke 205 coincides with the axis of the mounting cylinder 203 and the outer connecting part 204. The end of the connecting spoke 205 with a smaller diameter faces the direction of the motor 600.

[0076] In this embodiment, connecting the mounting cylinder 203 and the outer connecting part 204 via the connecting spoke 205 increases the connection path and improves heat dissipation. Optionally, the connecting spoke 205 includes a plurality of circumferentially evenly arranged strip plates, one end of which is connected to the inner wall of the mounting cylinder 203, and the other end is connected to the outer wall or end of the outer connecting part 204. This reduces the weight of the connecting spoke 205, further achieving lightweighting, and also facilitates air circulation, enhancing the cooling effect.

[0077] In some embodiments of the present invention, a second support boss 201 is provided on the outer side of the hub 200. The second support boss 201 can be a long strip structure in the shape of a rectangle, trapezoid, or triangle, etc. The second support boss 201 extends along the axial direction of the hub 200. An inner mating groove 401 is provided on the inner side of the moving disk 400. The shape of the inner mating groove 401 is adapted to the shape of the second support boss 201. The moving disk 400 is sleeved on the outer side of the hub 200, and the inner mating groove 401 of the moving disk 400 slides and engages with the second support boss 201. The outer side of the moving disk 400 is spaced apart from the inner wall of the housing 100.

[0078] Under the limiting action of the second support boss 201, the moving plate 400 can slide along the axial direction of the hub 200, and the moving plate 400 will not rotate relative to the hub 200. When the hub 200 rotates under the drive of the rotating shaft 601 of the motor 600, the moving plate 400 can rotate synchronously with the hub 200. When the stationary plate 300 applies braking torque to the moving plate 400, the moving plate 400 can transmit braking torque to the hub 200 through the second support boss 201.

[0079] It is understandable that the inner diameter of the stationary disc 300 is greater than or equal to the distance from the axis of the hub 200 to the outer side of the second support boss 201, so that the inner side of the stationary disc 300 and the second support boss 201 can slide together or form a gap, thus avoiding interference between the stationary disc 300 and the hub 200.

[0080] Optionally, the second support boss 201 is provided with a second ventilation groove 202, which extends along the axial direction of the hub 200, and has openings at both ends along the axial direction of the hub 200.

[0081] By providing a second ventilation slot 202, air can pass through it, increasing the cooling effect and reducing the weight of the disc hub 200. This reduces the energy consumption when the motor 600 drives the disc 400 and hub 200 to rotate, and further facilitates the lightweighting of the full disc brake device. In this embodiment, the cross-sectional shape of the second ventilation slot 202 can be rectangular, trapezoidal, or triangular, etc., and is not specifically limited here.

[0082] Combination Figure 2 and Figure 6 In some embodiments of the present invention, the external connection 204 is bolted to the rotating shaft 601 of the motor 600, and the spline 207 engages with it. Specifically, the external connection 204 is provided with an axial through hole 206, and a spline 207 is provided at one end of the external connection 204 located outside the housing 100. The external connection 204 is fixedly connected to the rotating shaft 601 of the motor 600 by a bolt that passes through the through hole 206 and is threadedly connected to the rotating shaft 601 of the motor 600. The spline 207 of the external connection 204 meshes with the spline 207 at the end of the rotating shaft 601 of the motor 600, thereby simultaneously achieving axial movement limitation and circumferential rotation limitation, ensuring stable transmission between the hub 200 and the rotating shaft 601 of the motor 600.

[0083] Combination Figure 9 The present invention also provides a wheel drive system, including a motor 600, a gearbox 700, an axle, and the aforementioned full disc brake device; wherein, the motor 600 includes a shaft 601, the output end of the shaft 601 is connected to the axle via the gearbox 700, and the non-output end of the shaft 601 is connected to the full disc brake device.

[0084] Optionally, the wheel drive system also includes a bushing 800, which is fitted onto the outside of the axle; one side of the motor 600 is elastically connected to the bushing 800. Specifically, the outer wall of the bushing 800 is provided with multiple mounting rings 801, and one side of the motor 600 is provided with a mounting hole. The motor 600 is fixedly connected to the bushing 800 by bolts that pass through both the mounting rings 801 and the mounting hole. An elastic washer is provided between the bolt and the bushing 800. The washer can be made of rubber or other materials, and no specific limitation is made here.

[0085] In this embodiment, the axle and bushing 800 are adapted to connect the wheel 900, and their specific connection structure will not be described in detail here.

[0086] Optionally, the gearbox 700 housing is fixedly connected to the bushing 800 with bolts, making the motor 600, bushing 800, and gearbox 700 a single unit. Therefore, the gearbox 700 does not require a separate suspension rod; only a vertical suspension rod 602 needs to be installed on the motor 600 to suspend the motor 600 and gearbox 700 and bear the balancing traction and braking torque. Because the gearbox 700 does not require a suspension rod, the structure of the pinion gearbox 700 housing is greatly simplified. Furthermore, the simplified, flexible, integral design of the motor 600 and gearbox 700 housing reduces the relative displacement between the motor 600 shaft and the pinion shaft of the gearbox 700, facilitating coupling selection, saving space in the entire wheel drive system, and contributing to the lightweight design of the wheel drive system. The absence of a suspension rod in the gearbox 700 also simplifies the structural framework.

[0087] The present invention also provides a rail vehicle, including the above-described full disc brake device, or including the above-described wheel drive system.

[0088] This invention also provides a braking method using the above-described full-disc brake device, the method comprising:

[0089] A braking torque is applied to the non-output end of the shaft 601 of the motor 600. The braking torque is transmitted to the gearbox 700 through the shaft 601 of the motor 600, and after being amplified by the gearbox 700, it is applied to the axle.

[0090] Specifically, the stationary disc 300 and the moving disc 400 are driven by the brake cylinder 500 to slide along the axial direction of the housing 100, so that the stationary disc 300 and the moving disc 400 come into contact and rub against each other. The braking torque is applied to the rotating shaft 601 of the motor 600 through the disc hub 200. The braking torque is transmitted to the gearbox 700 through the rotating shaft 601 of the motor 600. After being amplified by the gearbox 700, it is applied to the axle to achieve braking.

[0091] 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 full-disc braking device, characterized in that, include: The housing (100) is adapted to be fixedly connected to the housing of the motor (600); A hub (200) is rotatably disposed within the housing (100), and the hub (200) is fixedly connected to the non-output end of the shaft (601) of the motor (600); The stationary disc (300) is axially slidably connected to the housing (100) and forms an axial rotation limit with the housing (100); A movable disc (400), disposed on the disc hub (200), adapted to rotate synchronously with the disc hub (200); and Brake cylinder (500), the brake cylinder (500) is used to drive the stationary disc (300) and the moving disc (400) to make contact and engage for braking; The inner side of the housing (100) is provided with a first support boss (101), and the first support boss (101) is provided with a first ventilation groove (102). The hub (200) includes: The mounting sleeve (203) is used to connect with the moving disk (400); An external connection (204), located inside the mounting sleeve (203), is used to connect to the non-output end of the rotating shaft (601) of the motor (600); and The connecting spoke (205) is connected at one end to the inner side of the mounting cylinder (203) and at the other end to the outer part (204). The connecting spoke (205) is a tapered structure with a radial dimension that gradually decreases from the end connected to the mounting cylinder (203) to the end connected to the outer part (204).

2. The full-disc braking device according to claim 1, characterized in that, The end of the housing (100) is fixedly connected to the outer shell of the motor (600) by a flange structure, and a heat insulation gap is formed between the end plate (104) of the housing (100) and the outer shell of the motor (600).

3. The full-disc braking device according to claim 1 or 2, characterized in that, At least one of the stationary disk (300) and the moving disk (400) is provided in more than two, and the stationary disk (300) and the moving disk (400) are arranged alternately.

4. The full-disc braking device according to claim 1, characterized in that, The first support boss (101) extends along the axial direction of the housing (100); The stationary disc (300) is sleeved on the outside of the disc hub (200) and spaced apart from the disc hub (200). The outer side of the stationary disc (300) is provided with an outer mating groove (301), which slides with the first support boss (101).

5. The full-disc braking device according to claim 4, characterized in that, The first ventilation slot (102) extends axially along the housing (100) and penetrates radially through the first support boss (101) and the sidewall of the housing (100).

6. The full-disc braking device according to claim 1, characterized in that, A second support boss (201) is provided on the outer side of the hub (200), and the second support boss (201) extends along the axial direction of the hub (200). The inner side of the movable disk (400) is provided with an inner mating groove (401). The movable disk (400) is sleeved on the outer side of the disk hub (200), and the inner mating groove (401) of the movable disk (400) is slidably engaged with the second support boss (201). The outer side of the movable disk (400) is spaced apart from the inner wall of the housing (100).

7. The full-disc braking device according to claim 6, characterized in that, The second support boss (201) is provided with a second ventilation groove (202), which extends along the axial direction of the hub (200), and the second ventilation groove (202) has openings at both ends along the axial direction of the hub (200).

8. The full-disc braking device according to claim 1, characterized in that, The external part (204) is bolted to the shaft (601) of the motor (600) and is engaged by a spline (207).

9. A wheel drive system, characterized in that, Includes an electric motor (600), a gearbox (700), an axle, and a full-disc brake as described in any one of claims 1 to 8; The motor (600) includes a rotating shaft (601), the output end of which is connected to the axle via the gearbox (700), and the non-output end of which is connected to the full disc brake device.

10. The wheel drive system according to claim 9, characterized in that, It also includes a bushing (800), which is sleeved on the outside of the axle; one side of the motor (600) is elastically connected to the bushing (800).

11. A rail vehicle, characterized in that, Includes the full disc brake device as described in any one of claims 1 to 8, or includes the wheel drive system as described in claim 9 or 10.

12. A braking method using a full-disc brake device as described in any one of claims 1 to 8, characterized in that, include: A braking torque is applied to the non-output end of the shaft (601) of the motor (600), the braking torque being transmitted to the gearbox (700) through the shaft (601) of the motor (600), and then amplified by the gearbox (700) and applied to the axle.

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