Device for automatically adjusting height of train body of motor train unit

Abstract

The utility model relates to the technical field of motor train unit bodies, and discloses a device for automatically adjusting the height of a motor train unit body, which comprises an air spring, a servo motor, a speed sensor, a gear pair, a bearing, a mounting seat, a screw nut pair, a height adjusting rod, a connecting plate, a height adjusting valve, an air pipeline and a connecting bolt. A servo motor is controlled through a corresponding program to drive a screw-nut pair to move, and the screw-nut pair drives a height adjusting rod to move up and down, so that the height adjusting rod drives a valve element of a height adjusting valve to rotate, air intake and air exhaust of an air spring are controlled, namely, the pressure and height of the air spring are controlled; as the change of the train body height of the motor train unit is consistent with the change of the height of the air spring, the device can automatically adjust the train body height of the motor train unit. According to the utility model, the problem that passengers are inconvenient to get on and off due to settlement of partial railway station platforms can be effectively solved; air resistance during operation is fully utilized, and the purposes of saving energy, reducing emission and improving efficiency are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor vehicle body, in particular to a device which can automatically adjust the height of the vehicle body. Background Art

[0002] Air springs are one of the main components of the EMU suspension system and are closely related to the riding comfort of the EMU. Air springs are installed between the car body and the bogie, and have functions such as connection, buffering, load bearing, and vibration reduction. They are commonly used suspension devices for EMUs. When the load-bearing capacity of the EMU changes, the vehicle uses the existing air spring height adjustment device to keep the car body height constant. The main purpose is to keep the car body height consistent with the platform height of the railway station, to facilitate passengers to board and alight, and to improve the efficiency of railway transportation.

[0003] Nowadays, the settlement of platforms at some railway stations has caused heated discussions online. The inability to keep the height of the EMU body floor consistent with the platform not only reduces the efficiency of railway transportation, but also poses certain safety hazards. In addition, when the train speed exceeds 350 km / h, the proportion of air resistance in the total resistance increases to more than 85%, while the height of the EMU body remains basically constant. Therefore, it is impossible to actively adjust the height of the EMU body according to parameters such as speed and operating conditions, and it is impossible to make full use of air resistance to achieve the purpose of energy saving, emission reduction and improved braking efficiency.

[0004] In order to solve the above-mentioned problem caused by the unchanged height of the EMU body, this paper proposes a device for automatically adjusting the height of the EMU body. Utility Model Content

[0005] The utility model patent provides a device for automatically adjusting the height of the EMU body. The servo motor is controlled by a corresponding program to drive the screw nut pair to move. The screw nut pair drives the height adjustment rod to move up and down, thereby driving the height adjustment valve core to rotate, controlling the inflation or exhaust of the air spring. The height of the air spring is controlled by changing the pressure of the air spring. After the height of the air spring changes, the height adjustment valve core returns to its original position, and the air spring maintains a certain height, realizing the adjustable height function of the air spring. Since the change in the height of the EMU body is basically consistent with the change in the height of the air spring, the purpose of adjusting the height of the EMU body can be achieved, thereby solving the problems raised in the above-mentioned background technology. The utility model solution is completed by the following technical solutions:

[0006] A device for automatically adjusting the height of a motor vehicle body comprises an air spring 1, a servo motor 2, a speed sensor 3, a gear pair 4, an upper bearing and a bearing seat 5, a screw rod 6, a nut 7, a lower bearing and a bearing seat 8, a height adjustment rod 9, a connecting plate 10, a height adjustment valve 11, a height adjustment valve core 12, an air source air intake pipe 13, an air spring air intake pipe 14, an air spring exhaust pipe 15, and a height adjustment valve exhaust pipe 16. The air spring 1 is a main component of the suspension system of the motor vehicle, and is connected to a bogie at the bottom and a car body at the top, wherein the height of the bogie remains constant. The servo motor 2 is fixed to the bogie by bolts, and is controlled by a computer program to realize corresponding actions, thereby providing power for the adjustment device. The speed sensor 3 is installed on the servo motor 2, and is used to measure the direction and angle of rotation of the servo motor 2. The pinion of the gear pair 4 is installed on the output shaft of the servo motor 2, and the large gear is installed on the screw rod 6. The screw rod 6 and the nut 7 form a screw rod nut pair, which accurately converts rotation into translation. The upper bearing and bearing seat 5, the lower bearing and bearing seat 8 are installed on the bogie by bolts, and the bearing and bearing seat can provide support for the rotation of the screw rod 6. The nut 7 is connected to the height adjustment rod 9 by welding, and the connecting plate 10 is connected to the height adjustment rod 9 by bolts, and the connecting plate 10 can produce a certain angle of rotation. The connecting plate 10 is connected to the height adjustment valve core 12 by a square hole interference fit. The height adjustment valve 11 is fixed to the EMU body by bolts, and controls the air spring 1 intake and exhaust while receiving the pressure wind source, thereby controlling the height of the air spring 1. Since the height of the bogie below the air spring 1 is constant, the height of the EMU body and the height of the air spring 1 remain consistent.

[0007] Compared with the prior art, the utility model has the following advantages:

[0008] When the train is running at high speed, the height of the train body remains unchanged, so the body will be subject to greater air resistance, which also limits the maximum running speed of the train. This utility model patent can realize that the train can actively lower the body height when running, reduce the contact area between the front section and the air, so as to reduce the air resistance of the running and reduce energy consumption.

[0009] When the train brakes, the height of the train body remains unchanged, and it is impossible to increase the height of the train body to fully utilize the air resistance to reduce the train running speed. The utility model patent can realize that when the train brakes, the height of the train body is actively raised, the contact area between the front section and the air is increased, and the air resistance of the running is increased, which can further increase the braking deceleration of the train, achieve fast and safe parking, and improve the braking efficiency of the train.

[0010] This utility model patent can effectively solve the problem of inconvenience for passengers boarding and alighting caused by the settlement of platforms at some railway stations by automatically adjusting the height of the EMU body, so that the EMU body floor remains flush with the platform, making it convenient for passengers to board and alight and improving railway transportation efficiency.

[0011] Compared with the previous EMUs with constant height, the utility model patent can actively change the height of the air spring, that is, change the height of the EMU body, and can better adapt to the operating environment, such as strong winds, passing through curves, passing through tunnels, etc.

[0012] The servo motor in the utility model patent can be controlled by a computer program, and can output instructions to control the motor according to different operating conditions to achieve automatic adjustment of the car body height, which embodies the simplification and intelligence of the EMU car body height adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model.

[0014] Figure 2 It is a side view of the utility model.

[0015] Figure 3 It is a structural schematic diagram of the utility model from another viewing angle.

[0016] Figure 4 It is a schematic diagram of the gas circuit structure of the height adjustment valve and the air spring of the utility model.

[0017] Figure 5 It is a schematic diagram of the control flow structure of the utility model.

[0018] Figure numerals: air spring 1, servo motor 2, speed sensor 3, gear pair 4, upper bearing and bearing seat 5, screw rod 6, nut 7, lower bearing and bearing seat 8, height adjustment rod 9, connecting plate 10, height adjustment valve 11, height adjustment valve core 12, air source air inlet pipe 13, air spring air inlet pipe 14, air spring exhaust pipe 15, height adjustment valve exhaust pipe 16. DETAILED DESCRIPTION

[0019] Reference Figures 1 to 4A device for automatically adjusting the height of a train body is composed of an air spring 1, a servo motor 2, a speed sensor 3, a gear pair 4, an upper bearing and a bearing seat 5, a screw rod 6, a nut 7, a lower bearing and a bearing seat 8, a height adjustment rod 9, a connecting plate 10, a height adjustment valve 11, a height adjustment valve core 12, an air source air intake pipe 13, an air spring air intake pipe 14, an air spring exhaust pipe 15, and a height adjustment valve exhaust pipe 16. The servo motor 2 drives the gear pair 4 and the screw rod 6 to rotate, and the screw rod 6 drives the nut 7 and the height adjustment rod 9 to move up and down, so that the connecting plate 10 rotates at a certain angle, and then the height adjustment valve core 12 rotates, and the height adjustment valve 11 controls the air intake and exhaust of the air spring 1 to achieve the purpose of controlling the pressure and height of the air spring 1, and the height of the car body changes accordingly, and the position of the height adjustment valve 11 changes with the height of the car body. When the car body reaches the target height, the connecting plate 10 returns to the horizontal position, and the height adjustment process of the air spring 1 ends. The air spring 1 maintains the adjusted height, and the height of the EMU body also maintains the adjusted height, thereby achieving the purpose of automatic adjustment of the EMU body height.

[0020] Implementation Case 1

[0021] When it is necessary to actively raise the height of the EMU body, the direction and angle of rotation of the servo motor 2 are controlled by the program, and the height adjustment rod 9 can be accurately controlled to move upward through gear transmission and screw transmission. The rotation angle of the servo motor 2 is fed back through the speed sensor 3, which can feedback the position of the height adjustment rod 9. The height adjustment rod 9 drives the connecting plate 10 to rotate counterclockwise, and the connecting plate 10 drives the height adjustment valve core 12 to rotate counterclockwise through the square hole. The train air source enters the height adjustment valve 11 through the air source air intake pipe 13. After the height adjustment valve core 12 rotates counterclockwise, the height adjustment valve 11 opens the switch of the air spring air intake pipe 14, that is, the air spring 1 is filled with air, and its height increases. Since the height of the bogie below the air spring 1 remains unchanged, the height of the car body above the air spring 1 increases accordingly, and the height adjustment valve 11 rises with the increase in the height of the car body. After the height adjustment valve 11 is raised, the connecting plate 10 will gradually tend to be horizontal, and the height adjustment valve core 12 will also return to its original position as it rotates clockwise. The air spring air inlet pipe 14 is closed, and the air spring maintains this height. Since the height of the bogie below the air spring 1 is constant, the height of the car body above the air spring 1 is also increased accordingly.

[0022] When it is necessary to actively lower the height of the EMU body, the direction and angle of rotation of the servo motor 2 is controlled by the program, and the height adjustment rod 9 can be accurately controlled to move downward through gear transmission and screw transmission. The rotation angle of the servo motor 2 is fed back through the speed sensor 3, that is, the position of the height adjustment rod 9 can be fed back. The height adjustment rod 9 drives the connecting plate 10 to rotate clockwise, and the connecting plate 10 drives the height adjustment valve core 12 to rotate clockwise through the square hole. After the height adjustment valve core 12 rotates clockwise, the height adjustment valve 11 opens the switch of the air spring exhaust pipe 15, and discharges the pressurized air to the atmosphere through the height adjustment valve exhaust pipe 16, that is, the air spring 1 is exhausted, and its height is reduced. Since the height of the bogie below the air spring 1 remains unchanged, the height of the car body above the air spring 1 is reduced accordingly, and the height adjustment valve 11 is lowered as the height of the car body is reduced. After the position of the height adjustment valve 11 is lowered, the connecting plate 10 will gradually tend to be horizontal, and the height adjustment valve core 12 will also return to its original position as it rotates counterclockwise, the air spring exhaust pipe 15 is closed, and the air spring maintains this height. Since the height of the bogie below the air spring 1 is constant, the height of the car body above the air spring 1 is also reduced accordingly.

[0023] Implementation Case 2

[0024] When the load of the EMU increases, the air spring 1 is further compressed and the height is reduced, and the height of the car body is reduced accordingly, and the height adjustment valve 11 is lowered as the height of the car body is reduced. Since no height adjustment instruction is input, the servo motor 2, gear pair 4, screw 6, and nut 7 are controlled by the program to maintain the original state, that is, the position of the height adjustment rod 9 does not change, so it will cause the height adjustment valve spool 12 and the connecting plate 10 to rotate counterclockwise. The train air source enters the height adjustment valve 11 through the air source air intake pipe 13. After the height adjustment valve spool 12 rotates counterclockwise, the height adjustment valve 11 opens the switch of the air spring air intake pipe 14, that is, the air spring 1 is filled with air, and its height increases. Since the height of the bogie below the air spring 1 remains unchanged, the height of the car body above the air spring 1 increases accordingly, and the height adjustment valve 11 rises as the height of the car body increases. After the position of the height adjustment valve 11 is raised, the connecting plate 10 will gradually tend to be horizontal, and the height adjustment valve core 12 will also return to its original position as it rotates clockwise. The air spring air inlet pipe 14 is closed, and the air spring 1 returns to the height before the load-bearing capacity is increased. Since the height of the bogie below the air spring 1 remains constant, the height of the vehicle body above the air spring 1 also returns to its original height.

[0025] When the load-bearing capacity of the EMU is reduced, the air spring 1 is released and the height increases, and the height of the car body increases accordingly, and the height adjustment valve 11 rises as the height of the car body increases. Since no height adjustment command is input, the servo motor 2, gear pair 4, screw 6, and nut 7 are controlled by the program to maintain the original state, that is, the position of the height adjustment rod 9 does not change, so the height adjustment valve spool 12 and the connecting plate 10 will rotate clockwise. After the height adjustment valve spool 12 rotates clockwise, the height adjustment valve 11 opens the switch of the air spring exhaust pipe 15 and discharges the pressurized air to the atmosphere through the height adjustment valve exhaust pipe 16, that is, the air spring 1 is exhausted and its height is reduced. Since the height of the bogie below the air spring 1 remains unchanged, the height of the car body above the air spring 1 is reduced accordingly, and the height adjustment valve 11 is reduced as the height of the car body is reduced. After the position of the height adjustment valve 11 is lowered, the connecting plate 10 will gradually tend to be horizontal, and the height adjustment valve core 12 will also return to its original position as it rotates counterclockwise, the air spring exhaust pipe 15 will be closed, and the air spring 1 will return to the height before the load-bearing capacity is reduced. Since the height of the bogie below the air spring 1 remains constant, the height of the vehicle body above the air spring 1 will also return to its original height.

[0026] The above is an exemplary description of the utility model. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as various modifications are made using the method concept and technical solution of the utility model, or they are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A device for automatically adjusting the height of a motor vehicle body, comprising an air spring (1), a servo motor (2), a speed sensor (3), a gear pair (4), an upper bearing and a bearing seat (5), a screw rod (6), a nut (7), a lower bearing and a bearing seat (8), a height adjustment rod (9), a connecting plate (10), a height adjustment valve (11), a height adjustment valve core (12), an air source air intake pipe (13), an air spring air intake pipe (14), an air spring exhaust pipe (15), and a height adjustment valve exhaust pipe (16), wherein the air spring (1) is connected to a bogie at the bottom and to a car body at the top, the servo motor (2) is fixed to the bogie by bolts, and the The speed sensor (3) is mounted on the servo motor (2), the small gear of the gear pair (4) is mounted on the output shaft of the servo motor (2), the large gear is mounted on the screw rod (6), the upper bearing and the bearing seat (5), the lower bearing and the bearing seat (8) are mounted on the bogie by bolts, the nut (7) is connected to the height adjustment rod (9) by welding, the connecting plate (10) is connected to the height adjustment rod (9) by bolts, the connecting plate (10) is connected to the height adjustment valve core (12) by square hole interference fit, and the height adjustment valve (11) is fixed to the EMU body by bolts to receive the pressure wind source while controlling the air spring (1) to inhale and exhaust.

2. The device for automatically adjusting the height of a train body according to claim 1, characterized in that: The servo motor (2) can be controlled by a computer program to achieve automatic action under different working conditions.

3. The device for automatically adjusting the height of a train body according to claim 1, characterized in that: The speed sensor (3) can measure the direction and angle of rotation of the servo motor (2) to detect the position of the height adjustment rod (9).

4. The device for automatically adjusting the height of a train body according to claim 1, characterized in that: The screw rod (6) and the nut (7) form a screw rod and nut pair, which accurately converts rotation into translation.

5. The device for automatically adjusting the height of a train body according to claim 1, characterized in that: The connecting plate (10) and the height adjustment rod (9) can rotate at a certain angle.

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