Suspension type monorail vehicle braking system, air rail transportation system and braking method

Abstract

The invention relates to the technical field of suspension type monorail system braking, in particular to a suspension type monorail vehicle braking system, an air rail transportation system and a braking method.The suspension type monorail vehicle braking system comprises an electric braking system, a tread braking mechanism and a top rail braking mechanism; the linear motor is used for driving and braking a vehicle, the tread braking system comprises a tread braking piece and a tread braking driving mechanism, the tread braking driving mechanism is used for controlling the tread braking piece to act on wheel treads of the vehicle so as to generate braking force, and the top rail braking system comprises a top rail braking piece and a top rail braking driving mechanism. And the top rail brake driving mechanism is used for controlling the top rail brake component to act on the friction plate on the rail beam so as to generate brake force. According to the invention, the requirements of emergency braking and safe parking of the vehicle under the working condition of a long ramp can be met.

Description

Technical Field

[0001] The invention relates to the technical field of suspension monorail system braking, and in particular to a suspension monorail vehicle braking system, an empty rail transportation system and a braking method. Background Art

[0002] Suspended monorail trains have the characteristics of small footprint, small impact on urban environment, fast running speed, stable operation, strong adaptability, etc., and have great application potential. At present, some suspended monorail systems are driven by short stator linear motors. Their traction is directly provided by the short stator linear motor traction system, which is not constrained by the wheel-rail relationship, has strong climbing ability and small turning radius. Its braking method generally adopts electric braking, which is realized by linear motors. It is a braking method independent of wheel-rail adhesion, and can realize conventional speed regulation and deceleration control of trains, meeting the speed regulation performance requirements of conventional slope descent process. However, for long and long slopes, only electric braking cannot meet the emergency braking and parking safety of vehicles. Summary of the invention

[0003] The purpose of the present invention is to address the defects of the prior art and provide a suspended monorail vehicle braking system, an empty rail transportation system and a braking method, which meet the requirements of emergency braking and safe parking of the vehicle under long and steep slopes.

[0004] In order to solve the above technical problems, in a first aspect, the present invention provides a suspended monorail vehicle braking system, comprising an electric braking system, a tread braking mechanism and a top rail braking mechanism, the electric braking system comprising a linear motor, the linear motor being used to drive and brake the vehicle, the tread braking system comprising a tread braking member and a tread braking driving mechanism, the tread braking driving mechanism being used to control the tread braking member to act on the wheel tread of the vehicle to generate braking force, the top rail braking system comprising a top rail braking member and a top rail braking driving mechanism, the top rail braking driving mechanism being used to control the top rail braking member to act on the friction plate on the track beam to generate braking force.

[0005] The electric brake system of the present invention is a common brake, which is a braking mode applied by the vehicle in normal operation. The principle of common brake is that electric brake is given priority. The tread brake mechanism can directly act on the wheel, and is used for electric brake decay low-speed compensation, holding brake, emergency brake and parking brake in the conventional braking process. The top rail brake mechanism acts on the track beam. The top rail brake mechanism is a braking method independent of wheel-rail adhesion and is used for emergency braking and parking brake of the vehicle, meeting the requirements of emergency braking and safe parking of the vehicle under the working conditions of long and steep slopes.

[0006] Furthermore, the tread brake drive mechanism includes a tread brake cylinder, a piston and a sealed chamber are arranged in the tread brake cylinder, the sealed chamber is arranged on one side of the piston, the tread brake member is arranged on the other side of the piston and is connected to the piston, a restoring elastic member is arranged in the sealed chamber, one end of the restoring elastic member is connected to the cylinder wall of the tread brake cylinder, and the other end of the restoring elastic member is connected to the piston, an air inlet is opened on the tread brake cylinder, and the air inlet hole is used to fill compressed air into the sealed chamber, and the piston is pushed by the compressed air to push the tread brake member to act on the wheel tread of the vehicle.

[0007] The tread brake system of the present invention adopts an air brake method, using compressed air to push the piston, which in turn pushes the tread brake member to act on the wheel tread of the vehicle, thereby generating braking force. By setting a restoring elastic member, when the compressed air in the tread brake cylinder is discharged, the piston returns to its initial position under the action of the restoring elastic member.

[0008] Further, the piston includes a piston body and a push block, the push block is arranged on a side of the piston away from the sealing chamber, the width of the push block gradually decreases from one end close to the piston body to the end away from the piston body, the tread brake component includes a push rod and a brake shoe, the push rod is arranged perpendicular to the movement direction of the piston, the push rod is slidingly connected to the tread brake cylinder, a roller is rotatably provided on the push rod, one side of the push block abuts on the roller, the push block pushes the push rod through the roller, a relief elastic component is sleeved on the push rod, one end of the relief elastic component is connected to the push rod, and the other end of the relief elastic component is connected to the tread brake cylinder, and the relief elastic component is used to achieve relief.

[0009] The piston of the present invention adopts a push block with variable width to push the brake shoe on the push rod for braking. The push block has the function of amplifying the thrust, thereby ensuring the braking effect. There is rolling friction between the push block and the push rod, thereby reducing the wear on the push block. In addition, by arranging a relief elastic part, when the compressed air in the tread brake cylinder is discharged, the piston returns to the initial position under the action of the restoring elastic part, and the push rod also returns to the initial position under the action of the relief elastic part.

[0010] Furthermore, a limiting portion corresponding to the roller is provided in the tread brake cylinder, and the limiting portion is rotatably connected to the cylinder wall of the tread brake cylinder. Both sides of the push block respectively abut against the roller and the limiting portion. The side surface of the push block abutting against the limiting portion is parallel to the moving direction of the piston, and the side surface of the push block abutting against the roller is inclined to the moving direction of the piston.

[0011] The two sides of the push block of the present invention are respectively abutted against the roller and the limit part, so that when the push block pushes the push rod, the reaction force acts on the limit part, which is beneficial to increase the pushing force of the push block and avoid damage to the piston caused by the torque.

[0012] Furthermore, two rollers are symmetrically arranged on the push rod, and the piston includes two symmetrically arranged pushing blocks, and the two pushing blocks are arranged corresponding to the two rollers.

[0013] The present invention can increase the magnitude of the braking force and ensure the braking stability by arranging two symmetrical pushing blocks.

[0014] Furthermore, the pushing block is wedge-shaped.

[0015] In a second aspect, the present invention provides an empty rail transportation system, comprising a track beam and a bogie, wherein the track beam is a closed box-type structure, two tracks are arranged on the bottom surface of the track beam, the bogie is arranged between the two tracks, wheels are arranged on the bogie, the wheels are arranged on the tracks, one end of the bogie extends downward from the track beam, the tread brake mechanism and the top rail brake mechanism are both arranged on the bogie, the tread brake mechanism is arranged inside the track beam and close to the wheels, the top rail brake mechanism is arranged outside the track beam and close to the bottom of the track beam, a friction plate is arranged at the bottom of the track beam, and the friction plate is used to cooperate with the top rail brake mechanism.

[0016] The present invention can avoid the influence of the outside world on the tread brake mechanism through wheel braking by arranging the wheel and tread brake mechanism inside the track beam, and can reduce the influence of the outside world on the top rail brake mechanism through friction plate braking by arranging the top rail brake mechanism below the track beam. The two are independent of each other, do not interfere with each other, and have safety redundancy.

[0017] Furthermore, the track beam includes a top plate and two webs, the two webs are arranged in parallel and symmetrically, the upper ends of the two webs are fixedly connected to the top plate, and the lower ends of the two webs are fixedly provided with walking plates, the track is arranged on the inner side of the walking plate, the friction plate is arranged on the outer side of the walking plate, annular stiffening ribs are arranged on the outer sides of the top plate, the webs and the walking plates, and the annular stiffening ribs are evenly arranged along the length direction of the track beam, support brackets are arranged on the outer sides of the webs near both ends, and bottom stiffening ribs are arranged on the outer sides of the walking plates near both ends.

[0018] The track beam of the present invention improves the integrity between the top plate, the web plate and the running board by arranging annular stiffening ribs, thereby improving the structural strength of the track beam. By arranging support brackets and bottom stiffening ribs, it is ensured that the strength of the connection between two adjacent track beams meets the requirements.

[0019] Furthermore, a secondary induction track is arranged on the top surface of the track beam, a motor bracket is arranged on the top of the bogie, a linear motor is arranged on the motor bracket, and the linear motor is used to cooperate with the secondary induction track to drive the vehicle.

[0020] The linear motor of the invention is arranged on the top of the bogie, and the secondary induction track is arranged on the top surface in the track beam. The structure is compact, and the linear motor and the secondary induction track will not be disturbed by the outside world.

[0021] In a third aspect, the present invention provides a braking method for an aerial rail transportation system, comprising:

[0022] Normal braking: The train uses normal braking in normal operation, with the electric brake system providing the priority braking force. When the electric brake is detected to be insufficient, it is supplemented or replaced by the tread brake mechanism;

[0023] Emergency braking: When the controller receives an emergency braking command, it automatically cuts off the electric brake system, the emergency solenoid valve of the brake control device is powered off, and the pressurized air in the brake air reservoir is adjusted by the electronic empty and load valve to form the brake cylinder pre-control pressure. The compressed air in the brake air reservoir enters the tread brake cylinder and the top rail brake cylinder to generate a brake pressure that meets the emergency braking force requirements;

[0024] Rapid braking: When the controller receives a rapid braking command, the braking force provided by the electric braking system is used first, and the insufficient part is supplemented by the tread braking mechanism;

[0025] Holding brake: After the vehicle stops, when the sensor detects that the vehicle slope is greater than the preset slope, it sends a holding brake instruction to the controller. The controller controls the tread brake mechanism to always apply braking force to the vehicle to maintain braking. When the vehicle starts, when the traction force is greater than the holding brake force, the holding brake is released.

[0026] The tread brake mechanism and the top rail brake mechanism of the invention can realize emergency braking, braking force supplementation and anti-slipping of the vehicle on a large slope.

[0027] The beneficial effects of the present invention are as follows: the tread friction brake of the present invention is used for electric brake decay low-speed compensation, holding brake, emergency brake and parking brake in the conventional braking process. The top rail friction brake is used for emergency braking and parking brake of the train as a braking method independent of wheel-rail adhesion, and can still ensure the parking safety of the train on the entire line in the event of any brake failure. It meets the requirements of emergency braking and safe parking of vehicles under long and steep slope conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the sky rail transportation system of the present invention;

[0029] Figure 2 is a side view of the bogie of the present invention;

[0030] Figure 3 is a front view of the bogie of the present invention;

[0031] Figure 4 It is a structural schematic diagram of the tread brake mechanism of the present invention;

[0032] Figure 5 A side view of a bogie frame of the present invention;

[0033] Figure 6 is an elevation view of the track beam of the present invention;

[0034] Figure 7 It is a cross-sectional view of the end of the track beam of the present invention.

[0035] Reference numerals: electric brake system 1; linear motor 11; secondary induction track 12;

[0036] Tread brake mechanism 2; tread brake cylinder 21; piston body 22; push block 23; sealing chamber 24; push rod 25; roller 26; limiter 27; brake shoe 28;

[0037] Top rail brake mechanism 3;

[0038] Track beam 4; top plate 41; web plate 42; running board 43; annular stiffening rib 44; support bracket 45; bottom stiffening rib 46;

[0039] Bogie 5; wheel 51; first mounting seat 52; second mounting seat 53. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] like Figure 1 , 2 As shown, the present invention provides a suspended monorail vehicle braking system, including an electric braking system 1, a tread braking mechanism 2 and a top rail braking mechanism 3, the electric braking system 1 includes a linear motor 11 and a secondary induction rail 12, the linear motor 11 cooperates with the secondary induction rail 12 to drive and brake the vehicle, the tread braking system includes a tread braking member and a tread braking driving mechanism, the tread braking driving mechanism is used to control the tread braking member to act on the tread of the wheel 51 of the vehicle to generate a braking force, the top rail braking system includes a top rail braking member and a top rail braking driving mechanism, the top rail braking driving mechanism is used to control the top rail braking member to act on the friction plate on the track beam 4 to generate a braking force.

[0042] The electric brake system 1 of the present invention is used as a common brake, which is a braking mode applied by the vehicle in normal operation. The principle of common brake is that electric brake is given priority. Electric brake is realized by linear motor 11, which is a braking mode independent of wheel-rail adhesion. It can realize conventional speed regulation and deceleration control of train, and meet the speed regulation performance requirements of the maximum slope downhill process; tread brake mechanism 2 can directly act on wheel 51, and is used for electric brake decay low-speed compensation, holding brake, emergency brake and parking brake in the conventional braking process. Top rail brake mechanism 3 acts on track beam 4. Top rail brake mechanism 3 is a braking mode independent of wheel-rail adhesion, and is used for emergency braking and parking brake of the vehicle, which meets the requirements of emergency braking and safe parking of the vehicle under the working conditions of long and steep slopes.

[0043] Furthermore, if Figure 4 As shown, the tread brake drive mechanism includes a tread brake cylinder 21, a piston and a sealed chamber 24 are arranged in the tread brake cylinder 21, the sealed chamber 24 is arranged on one side of the piston, the tread brake member is arranged on the other side of the piston and connected to the piston, a restoring elastic member is arranged in the sealed chamber 24, one end of the restoring elastic member is connected to the cylinder wall of the tread brake cylinder 21, and the other end of the restoring elastic member is connected to the piston, an air inlet is provided on the tread brake cylinder 21, and the air inlet hole is used to fill the sealed chamber 24 with compressed air, and the piston is pushed by the compressed air to push the tread brake member to act on the tread of the wheel 51 of the vehicle. Among them, the restoring elastic member is not in the Figure 4 As shown in the figure, in some embodiments, the restoring elastic member includes a restoring spring and a guide sleeve, the guide sleeve is fixed at the top of the tread brake cylinder 21, a piston rod is arranged on the piston, the piston rod is inserted into the guide sleeve and is slidably connected with the guide sleeve, the restoring spring is sleeved on the guide sleeve and the piston rod, and the two ends of the restoring spring are fixedly connected to the tread brake cylinder 21 and the piston respectively, and the guide sleeve can ensure the stability of the piston movement.

[0044] The tread brake system of the present invention adopts an air brake method, using compressed air to push the piston, and then pushing the tread brake member to act on the tread of the vehicle wheel 51, thereby generating a braking force. By setting a restoring elastic member, when the compressed air in the tread brake cylinder 21 is discharged, the piston returns to its initial position under the action of the restoring elastic member.

[0045] Furthermore, if Figure 4As shown, the piston includes a piston body 22 and a push block 23. The push block 23 is arranged on the side of the piston away from the sealing chamber 24. The width of the push block 23 gradually decreases from the end close to the piston body 22 to the end away from the piston body 22. The tread brake member includes a push rod 25 and a brake shoe 28. The push rod 25 is arranged perpendicular to the movement direction of the piston. The push rod 25 is slidably connected to the tread brake cylinder 21. A roller 26 is rotatably provided on the push rod 25. One side of the push block 23 abuts against the roller 26. The push block 23 pushes the push rod 25 through the roller 26. A relief elastic member is sleeved on the push rod 25. One end of the relief elastic member is connected to the push rod 25, and the other end of the relief elastic member is connected to the tread brake cylinder 21. The relief elastic member is used to achieve relief. Among them, Figure 4 The relief elastic part is not shown in the figure. In some embodiments, the relief elastic part includes a relief spring. A limiting ring is provided on the push rod 25. One end of the relief spring abuts against the limiting ring of the push rod 25, and the other end of the relief spring abuts against the tread brake cylinder 21.

[0046] The piston of the present invention adopts a push block 23 with variable width to push the brake shoe 28 on the push rod 25 for braking. The push block 23 has the function of amplifying the thrust, thereby ensuring the braking effect. There is rolling friction between the push block 23 and the push rod 25, thereby reducing the wear on the push block 23. In addition, by setting a relief elastic member, when the compressed air in the tread brake cylinder 21 is discharged, the piston returns to the initial position under the action of the restoring elastic member, and the push rod 25 also returns to the initial position under the action of the relief elastic member.

[0047] Furthermore, if Figure 4 As shown, a limiting portion 27 corresponding to the roller 26 is provided in the tread brake cylinder 21, and the limiting portion 27 is rotatably connected to the cylinder wall of the tread brake cylinder 21. The two sides of the push block 23 are respectively in contact with the roller 26 and the limiting portion 27. The side of the push block 23 in contact with the limiting portion 27 is parallel to the piston moving direction, and the side of the push block 23 in contact with the roller 26 is inclined to the piston moving direction. The limiting portion 27 can also adopt the same structure as the roller 26, so that the push block 23 and the limiting portion 27 also have rolling friction, which reduces the friction degree of the push block 23 and increases its service life.

[0048] The two sides of the push block 23 of the present invention are respectively abutted against the roller 26 and the limit portion 27, so that when the push block 23 pushes the push rod 25, the reaction force acts on the limit portion 27, which is beneficial to increase the pushing force of the push block 23 and avoid damage to the piston due to the action of torque.

[0049] Furthermore, two rollers 26 are symmetrically arranged on the push rod 25 , and the piston includes two symmetrically arranged pushing blocks 23 , and the two pushing blocks 23 are arranged corresponding to the two rollers 26 .

[0050] The present invention can increase the magnitude of the braking force and ensure the stability of the braking by providing two symmetrical pushing blocks 23 .

[0051] Further, the push block 23 is wedge-shaped. The push block 23 can be welded or connected to the piston body 22 by thread.

[0052] The top rail brake mechanism 3 adopts the same structure as the tread brake mechanism 2 .

[0053] like Figure 1 As shown, the present invention provides an empty rail transportation system, including a track beam 4 and a bogie 5, as shown in Figure 7 As shown, the track beam 4 is a closed box structure. Figure 1 As shown, two tracks are arranged on the bottom surface of the track beam 4, a bogie 5 is arranged between the two tracks, a wheel 51 is arranged on the bogie 5, the wheel 51 is arranged on the track, one end of the bogie 5 extends downwardly out of the track beam 4, and the tread brake mechanism 2 and the top rail brake mechanism 3 are both arranged on the bogie 5. Figure 2 As shown, the tread brake mechanism 2 is arranged in the track beam 4 and close to the wheel 51. Figure 3 As shown, the top rail brake mechanism 3 is arranged outside the track beam 4 and close to the bottom of the track beam 4. A friction plate is provided at the bottom of the track beam 4. The friction plate is used to cooperate with the top rail brake mechanism 3. Figure 5 As shown, a first mounting seat 52 and a second mounting seat 53 are provided on the bogie 5 , the top rail brake mechanism 3 is fixed to the bogie 5 via the first mounting seat 52 , and the tread brake mechanism 2 is fixed to the bogie 5 via the second mounting seat 53 .

[0054] The present invention arranges the wheel 51 and the tread brake mechanism 2 inside the track beam 4, thereby avoiding the influence of the outside world on the braking of the tread brake mechanism 2 through the wheel 51. By arranging the top rail brake mechanism 3 below the track beam 4, the influence of the outside world on the braking of the top rail brake mechanism 3 through the friction plate can be reduced. The two are independent of each other, do not interfere with each other, and have safety redundancy.

[0055] Furthermore, if Figure 6 , 7 As shown, the track beam 4 includes a top plate 41 and two webs 42, the two webs 42 are arranged in parallel and symmetrically, the upper ends of the two webs 42 are fixedly connected to the top plate 41, and the lower ends of the two webs 42 are fixedly provided with walking plates 43, the track is arranged on the inner side of the walking plate 43, the friction plate is arranged on the outer side of the walking plate 43, and annular stiffening ribs 44 are arranged on the outer sides of the top plate 41, the webs 42 and the walking plates 43. The annular stiffening ribs 44 are evenly arranged along the length direction of the track beam 4, and support brackets 45 are arranged on the outer sides of the webs 42 near both ends, and bottom stiffening ribs 46 are arranged on the outer sides of the walking plates 43 near both ends.

[0056] The track beam 4 of the present invention improves the integrity between the top plate 41, the web 42, and the walking plate 43 by providing annular stiffening ribs 44, thereby improving the structural strength of the track beam 4. By providing support brackets 45 and bottom stiffening ribs 46, it is ensured that the strength of the connection between two adjacent track beams 4 meets the requirements.

[0057] Furthermore, if Figure 1 As shown, a secondary induction track 12 is arranged on the top surface of the track beam 4, a motor bracket is arranged on the top of the bogie 5, a linear motor 11 is arranged on the motor bracket, and the linear motor 11 is used to cooperate with the secondary induction track 12 to drive the vehicle.

[0058] The linear motor 11 of the present invention is arranged on the top of the bogie 5, and the secondary induction track 12 is arranged on the top surface of the track beam 4. The structure is compact, and the linear motor 11 and the secondary induction track 12 will not be disturbed by the outside world.

[0059] Based on the above-mentioned sky rail transportation system, the present invention further provides a braking method for the sky rail transportation system, comprising:

[0060] Normal braking: The train uses normal braking in normal operation, with the electric brake system 1 providing the braking force first. When the electric brake is detected to be insufficient, it is supplemented or replaced by the tread brake mechanism 2;

[0061] Emergency braking: When the controller receives an emergency braking command, it automatically cuts off the electric brake system 1, the emergency solenoid valve of the brake control device is powered off, and the pressurized air in the brake air reservoir is adjusted by the electronic empty and load valve to form a brake cylinder pre-control pressure. The compressed air in the brake air reservoir enters the tread brake cylinder 21 and the top rail brake cylinder to generate a brake pressure that meets the emergency braking force requirements;

[0062] Rapid braking: When the controller receives a rapid braking command, the braking force provided by the electric brake system 1 is used first, and the insufficient part is supplemented by the tread brake mechanism 2;

[0063] Holding brake: After the vehicle stops, when the sensor detects that the vehicle slope is greater than the preset slope, a holding brake instruction is sent to the controller. The controller controls the tread brake mechanism 2 to always apply braking force to the vehicle to maintain braking. When the vehicle starts, when the traction force is greater than the holding brake force, the holding brake is released.

[0064] Parking brake: The parking brake is implemented by the tread brake mechanism 2 with spring energy storage and the top rail brake mechanism 3. The parking brake is controlled by hard wire. The train is equipped with a parking brake application command line and a release command line. When the vehicle is stationary, the parking brake control switch can be used to manipulate the parking brake control valve in the brake control device to apply or release the parking brake. If the vehicle is parked for a long time and the air pressure of the whole vehicle leaks below a certain value, the parking brake will be automatically applied. The final actuator of the parking brake is the basic brake device. Each bogie 5 is provided with a tread brake mechanism 2 with spring energy storage and a top rail brake mechanism 3, and is provided with the ability to manually release on one side of the vehicle.

[0065] The tread brake mechanism 2 and the top rail brake mechanism 3 of the present invention can realize emergency braking, braking force supplementation and anti-slipping of the vehicle on a large slope.

[0066] Under adverse conditions such as an average emergency braking deceleration of not less than 1.0m / s2 and a 60‰ slope, a force 11 gale, and when the electric brake is withdrawn and one mechanical brake unit fails, the vehicle's emergency braking rate (GEBR) can still reach 0.15m / s2, ensuring that the train can still brake effectively; in addition, a combined braking mode of tread braking and top rail braking is adopted when the train is parked, and the parking safety factor under conditions of a 60‰ slope and a force 16 gale is not less than 1.2, which can ensure the parking safety of the train on the entire line.

[0067] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such 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 application, and should all be included in the protection scope of the present application.

Claims

1. A suspension monorail vehicle braking system, characterized in that: The invention comprises an electric brake system (1), a tread brake mechanism (2) and a top rail brake mechanism (3), wherein the electric brake system (1) comprises a linear motor (11), wherein the linear motor (11) is used to drive and brake a vehicle, wherein the tread brake system comprises a tread brake member and a tread brake drive mechanism, wherein the tread brake drive mechanism is used to control the tread brake member to act on the tread of a wheel (51) of the vehicle to generate a braking force, and wherein the top rail brake system comprises a top rail brake member and a top rail brake drive mechanism, wherein the top rail brake drive mechanism is used to control the top rail brake member to act on a friction plate on a track beam (4) to generate a braking force.

2. The suspension monorail vehicle braking system according to claim 1, characterized in that: The tread brake drive mechanism comprises a tread brake cylinder (21), a piston and a sealing chamber (24) are arranged in the tread brake cylinder (21), the sealing chamber (24) is arranged on one side of the piston, the tread brake member is arranged on the other side of the piston and is connected to the piston, a restoring elastic member is arranged in the sealing chamber (24), one end of the restoring elastic member is connected to the cylinder wall of the tread brake cylinder (21), and the other end of the restoring elastic member is connected to the piston, an air inlet is provided on the tread brake cylinder (21), and the air inlet is used to fill the sealing chamber (24), and the piston is pushed by the compressed air to push the tread brake member to act on the tread of the wheel (51) of the vehicle.

3. The suspension monorail vehicle braking system according to claim 2, characterized in that: The piston comprises a piston body (22) and a push block (23). The push block (23) is arranged on a side of the piston away from the sealing chamber (24). The width of the push block (23) gradually decreases from one end close to the piston body (22) to one end away from the piston body (22). The tread brake component comprises a push rod (25) and a brake shoe (28). The push rod (25) is arranged perpendicular to the movement direction of the piston. The push rod (25) is slidably connected to the tread brake cylinder (21). A roller (26) is rotatably arranged on the push rod (25). One side of the push block (23) abuts against the roller (26). The push block (23) pushes the push rod (25) through the roller (26). A relief elastic component is sleeved on the push rod (25). One end of the relief elastic component is connected to the push rod (25), and the other end of the relief elastic component is connected to the tread brake cylinder (21). The relief elastic component is used to achieve relief.

4. The suspension monorail vehicle braking system according to claim 3, characterized in that: A limiting portion (27) corresponding to the roller (26) is arranged in the tread brake cylinder (21), and the limiting portion (27) is rotatably connected to the cylinder wall of the tread brake cylinder (21). Two sides of the push block (23) respectively abut against the roller (26) and the limiting portion (27), and the side surface of the push block (23) abutting against the limiting portion (27) is parallel to the moving direction of the piston, and the side surface of the push block (23) abutting against the roller (26) is inclined to the moving direction of the piston.

5. The suspension monorail vehicle braking system according to claim 3, characterized in that: Two rollers (26) are symmetrically arranged on the push rod (25), and the piston comprises two symmetrically arranged push blocks (23), and the two push blocks (23) are arranged correspondingly to the two rollers (26).

6. The suspension monorail vehicle braking system according to claim 3, characterized in that: The pushing block (23) is wedge-shaped.

7. An empty rail transportation system according to any one of claims 1 to 6, characterized in that: The invention comprises a track beam (4) and a bogie (5), wherein the track beam (4) is a closed box-type structure, two tracks are arranged on the bottom surface of the track beam (4), the bogie (5) is arranged between the two tracks, wheels (51) are arranged on the bogie (5), the wheels (51) are arranged on the tracks, one end of the bogie (5) extends downwardly out of the track beam (4), the tread brake mechanism (2) and the top rail brake mechanism (3) are both arranged on the bogie (5), the tread brake mechanism (2) is arranged inside the track beam (4) and close to the wheels (51), the top rail brake mechanism (3) is arranged outside the track beam (4) and close to the bottom of the track beam (4), a friction plate is arranged at the bottom of the track beam (4), and the friction plate is used to cooperate with the top rail brake mechanism (3).

8. The sky rail transportation system according to claim 7, characterized in that: The track beam (4) comprises a top plate (41) and two web plates (42), the two web plates (42) are arranged in parallel and symmetrically, the upper ends of the two web plates (42) are fixedly connected to the top plate (41), the lower ends of the two web plates (42) are fixedly provided with a walking plate (43), the track is arranged on the inner side of the walking plate (43), the friction plate is arranged on the outer side of the walking plate (43), annular stiffening ribs (44) are arranged on the outer side of the top plate (41), the web plate (42) and the walking plate (43), the annular stiffening ribs (44) are evenly arranged along the length direction of the track beam (4), the outer side of the web plate (42) near both ends is provided with a support bracket (45), and the outer side of the walking plate (43) near both ends is provided with a bottom stiffening rib (46).

9. The sky rail transportation system according to claim 7, characterized in that: A secondary induction track (12) is arranged on the top surface of the track beam (4), a motor bracket is arranged on the top of the bogie (5), a linear motor (11) is arranged on the motor bracket, and the linear motor (11) is used to cooperate with the secondary induction track (12) to drive the vehicle.

10. A braking method for an aerial rail transportation system according to any one of claims 7 to 9, characterized in that: include: Normal braking: During normal operation, the train uses normal braking, with the electric brake system (1) providing the priority braking force. When the electric brake is detected to be insufficient, the tread brake mechanism (2) will supplement or replace it; Emergency braking: When the controller receives an emergency braking command, it automatically cuts off the electric brake system (1), the emergency solenoid valve of the brake control device is powered off, and the compressed air in the brake air reservoir is adjusted by the electronic empty and load valve to form a brake cylinder pre-control pressure. The compressed air in the brake air reservoir enters the tread brake cylinder (21) and the top rail brake cylinder to generate a brake pressure that meets the emergency braking force requirements; Rapid braking: When the controller receives a rapid braking command, the braking force provided by the electric braking system (1) is used first, and the insufficient part is supplemented by the tread braking mechanism (2); Holding brake: After the vehicle stops, when the sensor detects that the vehicle slope is greater than the preset slope, a holding brake instruction is sent to the controller, and the controller controls the tread brake mechanism (2) to always apply braking force to the vehicle to maintain braking. When the vehicle starts, when the traction force is greater than the braking force of the holding brake, the holding brake is released.

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