Full disc type braking device, wheel driving system, railway vehicle and braking method

Abstract

The invention relates to the technical field of railway vehicles, and provides a full-disc type braking device, a wheel drive system, a railway vehicle and a braking method.The full-disc type braking device comprises a brake machine shell, a movable disc, a static disc and an actuator, and the movable disc is arranged on an axle in a sleeving mode and suitable for rotating along with the axle; the static disc is arranged on one side of the movable disc and movably connected with the brake machine shell. The actuator is arranged on one side of the static disc, the output end of the actuator faces the static disc, and the actuator is suitable for applying thrust to the static disc to move towards the movable disc; and the static disc can move to be in frictional contact with the movable disc under the thrust state so as to brake the axle. According to the device, the brake machine shell, the movable disc, the static disc and the axle are integrally installed, the miniaturization design requirement of the bogie is met, only torque is applied to the axle in an annular disc type braking mode, no one-way bending moment exists, and therefore the loading condition of the axle is smaller than the total bending moment of a traditional structure.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and in particular to a full-disc brake device, a wheel drive system, a rail vehicle and a braking method. Background Art

[0002] Generally, rail vehicles require air brake calipers and brake discs for braking, and the brake discs are wheel discs or axle discs. As people's requirements for riding comfort and vehicle energy consumption increase, the demand for lightweight rail vehicle bogies is also increasing.

[0003] The basic braking device of traditional rail vehicle bogies generally uses pneumatic clamps to match brake wheel discs or brake shaft discs. The weight of the clamps and discs is relatively large. Each bogie is equipped with 4 clamps and 4 brake discs, and the weight is close to 800kg. This results in higher energy consumption and higher inter-sprung weight, which is not conducive to the demand for lightweight bogies. Summary of the invention

[0004] The present invention provides a full-disc brake device, a wheel drive system, a rail vehicle and a braking method, which are used to solve the technical problem that the above-mentioned brake device is too heavy to meet the lightweight requirement of the bogie.

[0005] The present invention provides a bogie full-disc brake device, comprising:

[0006] Brake housing,

[0007] A moving plate, mounted on the axle and adapted to rotate with the axle;

[0008] A static disc, disposed on one side of the dynamic disc and movably connected to the brake housing;

[0009] An actuator is disposed at one side of the static disk, with an output end of the actuator facing the static disk, and is suitable for applying a thrust force to the static disk to move toward the dynamic disk;

[0010] The static plate can move to frictionally contact with the dynamic plate under the thrust state to achieve braking of the axle.

[0011] According to the full-disc brake device provided by the present invention, the movable disc is sleeved on the axle through the connecting hole and is slidably connected with the axle along the axial direction of the axle;

[0012] The outer edge of the static disc is slidably connected to the inner surface of the brake housing along the axial direction of the axle.

[0013] According to the full disc brake device provided by the present invention, a disc hoop is sleeved on the axle, and a first spline extending axially along the axle is provided on the surface of the disc hoop, and the first spline cooperates with the keyway of the connecting hole, and is suitable for guiding the movable disc to move axially along the axle and limiting the movable disc in the circumferential direction of the axle.

[0014] According to the full-disc brake device provided by the present invention, the inner surface of the brake housing is provided with a second spline extending along the axial direction of the axle, and the second spline cooperates with the keyway on the outer edge of the stator disc, and is suitable for guiding the stator disc to move axially along the axle and limiting the stator disc in the circumferential direction of the brake housing.

[0015] According to the full-disc brake device provided by the present invention, the number of the static disks is greater than the number of the dynamic disks, and each dynamic disk is located between two static disks.

[0016] According to the full disc brake device provided by the present invention, the actuator comprises a mounting frame and at least one hydraulic actuator arranged on the mounting frame;

[0017] The mounting frame is sleeved on the outside of the axle and connected to the shaft sleeve through a connecting piece, and the output end of the hydraulic actuator faces the static plate.

[0018] According to the full-disc brake device provided by the present invention, one end of the brake housing is connected to the shaft sleeve outside the axle, and the other end is connected to the gear box housing.

[0019] According to the full-disc brake device provided by the present invention, a heat insulation plate is provided on a side of the brake housing close to the gear box, and the heat insulation plate is detachably connected to the brake housing via a connecting piece.

[0020] The present invention also provides a wheel drive system, comprising:

[0021] Bogies;

[0022] A motor, mounted on the bogie;

[0023] A gear box, mounted on the bogie and connected to an output end of the motor;

[0024] A wheelset, comprising a wheel and an axle, wherein the axle is connected to an output end of the gearbox;

[0025] The full disc brake device as described above is mounted on the axle.

[0026] The present invention also provides a rail vehicle, comprising:

[0027] Vehicle body;

[0028] The wheel drive system as described above is installed on the vehicle body.

[0029] The present invention also provides a braking method, comprising:

[0030] Installing the above-mentioned full-disc brake device on the axle, connecting one end of the full-disc brake device to one side of the gear box, and connecting the other end of the full-disc brake device to the shaft sleeve outside the axle;

[0031] The axle is braked by controlling the actuator to push the stationary plate to frictionally contact with the movable plate.

[0032] The full-disc brake device provided by the present invention integrates the brake housing, the dynamic disc and the static disc with the axle, thereby realizing the miniaturized design requirement of the bogie. The annular disc brake mode only exerts torque on the axle but no unidirectional bending moment. Therefore, the load condition of the axle is smaller than the total bending moment of the traditional structure.

[0033] The wheel drive system provided by the present invention includes the above-mentioned full-disc brake device, which has all the beneficial effects of the full-disc brake device. To avoid repetition, it will not be described here.

[0034] The rail vehicle provided by the present invention includes the above-mentioned wheel drive system, and thus has all the beneficial effects of the wheel drive system. To avoid repetition, they are not described here.

[0035] The braking method provided by the present invention, using the full-disc braking device as described above, also has all the above advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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.

[0037] Figure 1 is a cross-sectional view of the full disc brake device provided by the present invention;

[0038] Figure 2 is an appearance diagram of the full disc brake device provided by the present invention;

[0039] Reference numerals:

[0040] 10. brake housing; 110. second spline;

[0041] 20, axle; 210, bushing; 220, disc hoop; 230, first spline;

[0042] 30. gear box; 310. input shaft; 320. gear set; 330. heat shield;

[0043] 40. Moving plate;

[0044] 50. Quiet disk;

[0045] 60. Actuator; 610. Mounting frame; 620. Hydraulic actuator. DETAILED DESCRIPTION

[0046] 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.

[0047] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0048] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0049] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0051] Combine the following Figure 1-Figure 2 Embodiments of the present invention are described.

[0052] Please refer to Figure 1 and Figure 2 The embodiment of the present invention provides a full-disc brake device, including a brake housing 10, a moving disc 40, a static disc 50 and an actuator 60. The moving disc 40 is mounted on the axle 20 and can rotate with the axle 20; the static disc 50 is arranged on one side of the moving disc 40 and close to the moving disc 50, and the static disc 50 is movably installed in the brake housing 10.

[0053] Specifically, the movable plate 40 has a connecting hole in the center, and the movable plate 40 is sleeved on the axle 20 through the connecting hole and is slidingly connected to the axle 20 along the axial direction of the axle 20; the static plate 50 is also sleeved on the axle 20, but does not rotate with the axle 20. The static plate 50 may not be connected to the axle 20, and the outer edge of the static plate 50 is slidingly connected to the inner surface of the brake housing 10 along the axial direction of the axle 20.

[0054] In this embodiment, the actuator 60 is arranged on one side of the static disk 50, and the output end of the actuator 60 is toward the static disk 50, and can extend to apply a thrust to the static disk 50 to move toward the dynamic disk 40; in the braking state, the actuator 60 acts on the static disk 50, and the static disk 50 moves to frictionally contact with the dynamic disk 40 after receiving the thrust to achieve braking of the axle 20.

[0055] The present embodiment adopts a stationary disc 50 and a moving disc 40 to achieve braking, avoiding the setting of a traditional air brake caliper and a wheel disc or an axle disc. The weight of the stationary disc 50 and the moving disc 40 is much smaller than the weight of the air brake caliper and the wheel disc or the axle disc, thus meeting the lightweight requirements of the vehicle wheel drive system.

[0056] like Figure 1As shown, in one embodiment, a disc hoop 220 is sleeved on the axle 20, and a first spline 230 extending axially along the axle 20 is provided on the surface of the disc hoop 220, and the first spline 230 cooperates with the keyway of the connecting hole of the movable plate 40 to guide the movable plate 40 to move axially along the axle 20, and the first spline 230 can limit the movable plate 40 in the circumferential direction of the axle 20 to ensure that the movable plate 40 and the axle 20 rotate synchronously.

[0057] like Figure 1 As shown, in one embodiment, the inner surface of the brake housing 10 is provided with a second spline 110 extending axially along the axle 20, and the second spline 110 cooperates with the keyway on the outer edge of the stator disc 50 to guide the stator disc 50 to move axially along the axle 20 and limit the stator disc 50 in the circumferential direction of the brake housing 10 to prevent the stator disc 50 from rotating.

[0058] In this embodiment, there are at least one moving disc 40 and at least one stationary disc 50. The brake housing 10 is respectively connected to the sleeve 210 and the gear box 30 on the outside of the axle 20. At least one moving disc 40 is arranged in the brake housing 10. One end of the moving disc 40 is slidably connected to the first spline 230 on the disc hoop 220 arranged on the axle 20. The length extension direction of the first spline 230 is consistent with the axial direction of the axle 20.

[0059] At least one static disc 50 is disposed in the brake housing 10. The static disc 50 is disposed on one side of the dynamic disc 40. One end of the static disc 50 is slidingly connected to the brake housing 10 through a second spline 110. The output end of the actuator 60 faces the static disc 50 and is used to press the static disc 50 so that the static disc 50 and the dynamic disc 40 are in frictional contact to achieve braking of the axle 20.

[0060] That is, when the axle 20 is rotating, the hoop 220 rotates with the axle 20, and at this time, there is no force between the static plate 50 and the dynamic plate 40, and the static plate 50 and the dynamic plate 40 move independently. When the axle 20 needs to be braked, the actuator 60 acts on the static plate 50, and the static plate 50 moves axially relative to the brake housing 10 and presses against the dynamic plate 40, and friction is generated between the static plate 50 and the dynamic plate 40 to achieve braking of the dynamic plate 40. When the dynamic plate 40 is braked, the axle 20 connected to the dynamic plate 40 achieves a braking effect.

[0061] When the actuator 60 cancels the force applied to the static plate 50 , the static plate 50 and the dynamic plate 40 return to a state of non-interference with each other, thereby achieving contact braking.

[0062] In this embodiment, the brake housing 10, the moving disc 40 and the stationary disc 50 are integrated with the axle 20 to achieve the miniaturized design requirements of the bogie. The annular disc braking method only exerts torque on the axle 20 but no unidirectional bending moment. Therefore, the load condition of the axle 20 is smaller than the total bending moment of the traditional structure. Under the same load conditions, a smaller diameter axle 20 is selected to reduce the unsprung weight, which is beneficial to the inspection of the wheel-rail impact load and improves the safety of the rail vehicle.

[0063] In one embodiment, the number of the static plates 50 is greater than the number of the dynamic plates 40 , and each dynamic plate 40 is located between two static plates 50 .

[0064] In one embodiment, the number of the static disk 50 is at least one more than the dynamic disk 40; the actuator 60 is located on the side of the brake housing 10 away from the gear box 30, one of the static disks 50 is arranged toward the output end of the actuator 60, and the other static disk 50 is arranged on the side of the brake housing 10 close to the gear box 30.

[0065] The internal placement space of the brake includes a first end and a second end. The end of the brake inside close to the gear box 30 is the first end, and the end of the brake inside away from the gear box 30 is the second end. The number of static disks 50 is at least one more than the moving disk 40. When there is one moving disk 40, there are two static disks 50, and they are arranged on both sides of the moving disk 40.

[0066] When there are two moving disks 40, three static disks 50 may be provided, and arranged alternately with the moving disks 40. The present invention is described by taking two moving disks 40 and three static disks 50 as an example, but is not limited thereto.

[0067] At least two stationary discs 50 are disposed at opposite ends of the brake, so as to prevent the moving disc 40 from directly contacting the gear box 30 or the actuator 60 and affecting their operating state.

[0068] In one embodiment, the actuator 60 includes a mounting frame 610 and at least one hydraulic actuator 620 disposed on the mounting frame 610; the mounting frame 610 is sleeved on the outside of the axle 20 and connected to the sleeve 210 through a connecting piece, and the output end of the hydraulic actuator 620 faces the stator 50.

[0069] One end of the mounting frame 610 is sleeved on the axle 20, and the outer side of the other end is connected to the sleeve 210 through a connecting piece. The connecting piece can be a bolt, a screw, etc., which is not limited here. The number of connecting pieces can be two, four, six, etc., which is not limited here. Multiple connecting pieces can be evenly spaced around the outer circumference of the mounting frame 610.

[0070] A keyway or a slide groove is provided on the outer end surface of the static plate 50 for sliding cooperation with the second spline 110; a keyway or a slide groove is provided on the inner end surface of the dynamic plate 40 for sliding cooperation with the first spline 230, so that the static plate 50 can slide cooperation with the brake housing 10, and the dynamic plate 40 can slide cooperation with the disc hoop 220.

[0071] Thus, when the hydraulic actuator 620 acts on the static plate 50, the static plate 50 is pressed against the dynamic plate 40 and frictionally contacts with the dynamic plate 40 to achieve a braking effect. When the hydraulic actuator 620 cancels the force applied to the static plate 50, the dynamic plate 40 rotates with the axle 20 without friction from the static plate 50, and the brake is released.

[0072] In this embodiment, one end of the brake housing 10 is connected to the shaft sleeve 210 outside the axle 20 , and the other end is connected to the gear box housing to achieve fixed installation of the brake housing 10 , thereby ensuring the installation of the stator 50 .

[0073] In one embodiment, the stationary plate 50 is a carbon ceramic stationary plate, and the moving plate 40 is a powder metallurgy moving plate. The combination of the carbon ceramic stationary plate and the powder metallurgy moving plate has a more stable friction coefficient.

[0074] In one embodiment, a heat shield 330 is provided between the full disc brake device and the gear box 30 to isolate the brake housing 10 from the gear box 30 .

[0075] During the braking process, a large amount of heat is generated between the static plate 50 and the dynamic plate 40. In order to prevent excessive heat from being transferred to the gear box 30 side, a heat insulation plate 330 is arranged between the brake housing 10 and the gear box 30 to prevent excessive heat from entering the gear box 30 side and affecting its normal operation.

[0076] In order to further improve the heat dissipation, a plurality of heat dissipation holes (not shown) are provided on the outside of the brake housing 10. The provision of the heat dissipation holes facilitates the rapid dissipation of the heat generated by braking and is also conducive to meeting the lightweight requirements of the bogie.

[0077] In this embodiment, the full disc brake device, the heat shield 330 and the gear box 30 are connected by at least one threaded connector. The threaded connector can be a bolt or a screw, which is not limited here. The threaded connector is installed from the outside of the gear box 30 and the brake housing 10 to the inside, which is convenient for later disassembly and maintenance.

[0078] The axle 20 is provided with a disc hoop 220 inside the brake housing 10 . The disc hoop 220 is provided with a first spline 230 . The length extension direction of the first spline 230 is consistent with the axial direction of the axle 20 .

[0079] The disc hoop 220 and the axle 20 may be integrally provided or connected by press fitting, which is not limited here.

[0080] The embodiment of the present invention further provides a wheel drive system, which includes a bogie, a motor, a gear box 30, a wheelset and the above-mentioned full disc brake device.

[0081] The motor is mounted on the bogie; the gear box 30 is mounted on the bogie and connected to the output end of the motor; the wheelset includes a wheel and an axle 20, and the axle is connected to the output end of the gear box 30; and the full disc brake device is mounted on the axle 20.

[0082] The gearbox 30 includes an input shaft 310 and a gear set 320. One end of the gear set 320 is connected to the input shaft 310, and the other end is connected to the axle 20. One end of the input shaft 310 is used to connect to the motor. The motor is used to output a rotational force to the input shaft 310. The rotation of the input shaft 310 drives the gear set 320 to rotate, thereby driving the axle 20 to rotate.

[0083] Likewise, this wheel drive system has all the advantages of the above-mentioned full disc brake device.

[0084] An embodiment of the present invention further provides a rail vehicle, comprising a vehicle body and the wheel drive system as described above. The wheel drive system is installed on the vehicle body to provide power for the vehicle body and also has all the advantages as described above.

[0085] The embodiment of the present invention further provides a braking method, comprising the following steps:

[0086] Step 1: Install the full disc brake device as described above on the axle 20, connect one end of the full disc brake device to one side of the gear box 30, and connect the other end of the full disc brake device to the shaft sleeve 210 outside the axle 20;

[0087] The moving plate 40 is connected to the axle 20 and rotates with the axle 20 . The stationary plate 50 is installed on the brake housing 10 . The actuator 60 is installed on one side of the stationary plate 50 .

[0088] Step 2: By controlling the actuator 60 to operate, the actuator 60 extends to push the stationary plate 50 until it is in frictional contact with the moving plate 40 to achieve braking of the axle 20 .

[0089] Through this method, the full disc brake device directly brakes the axle 20, the braking torque is transmitted more directly and reliably, and the bending moment of the axle 20 is reduced, thereby reducing weight, and a thinner axle 20 can be selected under the same load conditions.

[0090] 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 full disc brake device, characterized in that: include: Brake housing; A moving plate, mounted on the axle and adapted to rotate with the axle; A static disc, disposed on one side of the dynamic disc and movably connected to the brake housing; An actuator is disposed at one side of the static disk, with an output end of the actuator facing the static disk, and is suitable for applying a thrust force to the static disk to move toward the dynamic disk; The static plate can move to frictionally contact with the dynamic plate under the thrust state to achieve braking of the axle.

2. The full disc brake device according to claim 1, characterized in that: The moving plate is sleeved on the axle through a connecting hole and is slidably connected with the axle along the axial direction of the axle; The outer edge of the static disc is slidably connected to the inner surface of the brake housing along the axial direction of the axle.

3. The full disc brake device according to claim 2, characterized in that: A disc hoop is sleeved on the axle, and a first spline extending axially along the axle is provided on the surface of the disc hoop. The first spline cooperates with the keyway of the connecting hole and is suitable for guiding the movable plate to move axially along the axle and limiting the movable plate in the circumferential direction of the axle.

4. The full disc brake device according to claim 2, characterized in that: The inner surface of the brake housing is provided with a second spline extending axially along the axle, and the second spline cooperates with the keyway on the outer edge of the static disc, and is suitable for guiding the static disc to move axially along the axle and limiting the static disc in the circumferential direction of the brake housing.

5. The full disc brake device according to claim 2, characterized in that: The number of the static disks is greater than the number of the dynamic disks, and each dynamic disk is located between two static disks.

6. The full disc brake device according to any one of claims 1 to 5, characterized in that: The actuator comprises a mounting frame and at least one hydraulic actuator arranged on the mounting frame; The mounting frame is sleeved on the outside of the axle and connected to the shaft sleeve through a connecting piece, and the output end of the hydraulic actuator faces the static plate.

7. The full disc brake device according to any one of claims 1 to 5, characterized in that: One end of the brake housing is connected to the shaft sleeve outside the axle, and the other end is connected to the gear box housing; a heat insulation plate is provided on the side of the brake housing close to the gear box, and the heat insulation plate is detachably connected to the brake housing through a connecting piece.

8. A wheel drive system, characterized in that: include: Bogies; A motor, mounted on the bogie; A gear box, mounted on the bogie and connected to an output end of the motor; A wheelset, comprising a wheel and an axle, wherein the axle is connected to an output end of the gearbox; The full disc brake device according to any one of claims 1 to 7, mounted on the axle.

9. A rail vehicle, characterized in that: include: Vehicle body; The wheel drive system according to claim 8, wherein the wheel drive system is mounted on the vehicle body.

10. A braking method, characterized in that: include: Installing the full disc brake device as claimed in any one of claims 1 to 7 on the axle, connecting one end of the full disc brake device to one side of the gear box, and connecting the other end of the full disc brake device to the shaft sleeve outside the axle; The axle is braked by controlling the actuator to push the stationary plate to frictionally contact with the movable plate.

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