Electric parking device for railway vehicle

Abstract

The invention relates to the technical field of railway vehicle braking, and discloses an electric parking device for a railway vehicle, which comprises a supporting piece, a driving piece is arranged in the supporting piece in a sliding manner, a connector is fixed at the end part of the driving piece, one end of the connector is fixed on the driving piece, and a connecting piece is fixed at the other end of the connector; the end of the connecting piece is connected with a basic braking device, the supporting piece is further provided with an amplifying module facilitating operation and saving labor, a steering module used for changing the direction of force and a self-locking module used for locking, and the amplifying module, the steering module and the self-locking module are used for enabling the driving piece to slide and be locked and preventing a vehicle connected to the connecting piece from moving. The parking device is convenient to operate, time-saving and labor-saving, compared with a traditional mechanical holding type parking device, the parking device has the function of actively generating parking force and can not be influenced by original vehicle braking, secondary parking can be achieved after parking is relieved, meanwhile, compared with a transmission stepped parking locking structure, stepless locking is achieved through the structure, parking force loss is avoided after parking, and the parking device is safe and reliable. Parking efficiency is high, and safety and reliability are high; in addition, the parking locking force can be accurately controlled, and compared with traditional manual braking control through manual experience control, the parking locking force control device has congenital advantages and is high in safety and reliability.

Description

Technical Field

[0001] This application relates to the technical field of railway vehicle braking, and particularly to an electric parking brake for railway vehicles. Background Art

[0002] The problem of railway vehicle runaway is a major safety issue in railway. At present, in order to ensure the safe parking of trains and prevent vehicle runaway, the anti-runaway measures adopted by railway freight cars at home and abroad are still the traditional methods of manually tightening the vehicle hand brakes and placing anti-runaway shoes. There are also methods of installing parking brakes, but the parking devices for railway freight vehicles on the market are mechanical holding locking structures, which cannot actively generate parking force, cannot perform secondary parking before braking again after release, and at the same time, the existing structures are step-by-step locking, resulting in parking force loss after parking.

[0003] Manual anti-runaway operations have the following disadvantages: 1. When braking with the hand brake, it is necessary to manually turn each carriage. When releasing the anti-runaway measures, it is also necessary to manually release each carriage. The operation is inconvenient, time-consuming, and there is a possibility of omission in release. 2. The anti-runaway shoes are heavy in themselves, inconvenient to carry, time-consuming in operation, low in efficiency, high in labor intensity of operators, and high in danger, posing potential safety hazards to personnel. When releasing the anti-runaway measures, there is a possibility of omission, resulting in vehicle operation safety accidents. Summary of the Invention

[0004] In order to solve the problems of the above mechanical holding parking device and manual anti-runaway operations, this application provides an electric parking brake for railway vehicles.

[0005] This application provides an electric parking brake for railway vehicles, adopting the following technical solution: An electric parking brake for railway vehicles includes a support member, a driving member is slidably arranged in the support member, a connecting head is fixed at the end of the driving member, one end of the connecting head is fixed on the driving member, and the other end is fixed with a connecting member. The end of the connecting member is connected to the basic braking device. An amplification module for facilitating labor-saving operation, a steering module for changing the direction of force, and a self-locking module for locking are further arranged on the support member. The amplification module, the steering module, and the self-locking module are used to slide and lock the driving member and prevent the vehicle connected to the connecting member from moving.

[0006] By adopting the above technical solution, after the vehicle brakes and stops, through the driving source, under the combined action of the amplification module, the steering module, and the self-locking module, the driving member retracts. The connecting member is connected to the basic braking device through a pulley group. After being tightened to the required value, the braking force on the wheel can be applied and maintained, realizing the parking function. The electric parking brake can realize the function of the hand brake, with convenient operation, time-saving and labor-saving, the locking force can be accurately controlled, and it is safe and reliable.

[0007] Optionally, the amplification module, steering module, and self-locking module include a guiding portion threadedly connected to the driving member. The guiding portion guides and drives the driving member. The amplification module, steering module, and self-locking module further include a driving mechanism for rotating the guiding portion and moving the driving member linearly.

[0008] By adopting the above technical solution, after the vehicle brakes and stops, the driving member is controlled to retract to lock the vehicle. When the vehicle brake needs to be released, the driving member is controlled to extend, and the connection member is relaxed without affecting the release of the vehicle.

[0009] Optionally, an installation portion is fixed on the support member. The driving mechanism includes a worm gear rotatably connected to the installation portion and a worm meshing with the worm gear. An installation hole is provided on the worm gear. The end of the guiding portion is connected with a transmission portion, and the transmission portion is inserted into the installation hole. A transmission key for driving the guiding portion to rotate synchronously is provided on the worm gear. The driving mechanism further includes a driving component for rotating the worm gear.

[0010] By adopting the above technical solution, the driving component drives the worm to rotate, the worm drives the worm gear to rotate, and during the rotation of the worm gear, the transmission portion and the guiding portion are driven to rotate through the transmission key, thereby controlling the telescoping of the connection member.

[0011] Optionally, the driving component includes a manual driving component and an electric driving component. The manual driving component includes a manual member detachably connected to the worm and driving the worm to rotate. The electric driving component includes a transmission gear coaxially fixed on the worm, a driving gear rotatably connected to the installation portion and meshing with the transmission gear, and a power member fixed on the installation portion for driving the driving gear to rotate.

[0012] By adopting the above technical solution, the power member drives the driving gear to rotate, and the driving gear drives the transmission gear to rotate, thereby driving the corresponding worm and worm gear to rotate, realizing the electric control of the whole driving.

[0013] Optionally, the power member includes a rotating motor for driving the driving gear to rotate, and a power connection port for a mobile power source is provided on the rotating motor.

[0014] By adopting the above technical solution, the mobile power source carried by the carriage or the staff is connected to the corresponding connection port to control the rotation of the driving gear.

[0015] Optionally, a bearing is fixed inside the support member, and the driving member is inserted into the bearing.

[0016] By adopting the above technical solution, the bearing is used to play a certain role in limiting and positioning the movement of the guiding portion, making the overall structure more stable and the movement of the guiding portion smoother.

[0017] Optionally, auxiliary bearings and auxiliary bearing seats for axially positioning the worm gear are fixed on both axial sides of the worm gear.

[0018] By adopting the above technical solution, the auxiliary bearings and the auxiliary bearing seats enable only torque to be transmitted between the worm gear and the guiding part, without transmitting axial force, ensuring the stability of the structure.

[0019] Optionally, a cable connector communicating with the power source and facilitating external connection is provided on the installation part, and the corresponding controller and display are connected through the cable connector.

[0020] By adopting the above technical solution, the settings of the controller and the display facilitate data observation and control of the entire process at the same time.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: Before there was no electric parking brake, there were mainly difficulties in managing iron shoes, high manual operation intensity for manual braking, and inaccurate operation and incomplete operation. The mechanical holding type electric parking devices on the market cannot actively generate parking force and must rely on the existing braking force to be applied and then maintained. After the parking is released, no braking force is applied and secondary parking cannot be achieved. At the same time, the traditional holding type electric parking device has an organic locking structure, and there is a loss of braking force after parking. After installing this electric parking brake, when the vehicle stops, by controlling the driving part to retract, the connecting part is connected to the basic braking device through a pulley group. After being tightened to the required value, the braking of the wheel can be maintained to achieve the parking function; when the vehicle braking needs to be released, controlling the driving part to extend and the connecting part to relax will not affect the release of the vehicle. The operation of the present invention is convenient, time-saving and labor-saving. Compared with the traditional mechanical holding type electric parking device, it has the function of actively generating parking force, can be not affected by the original vehicle braking, can achieve secondary parking after the parking is released. At the same time, compared with the traditional stepped parking locking structure, this structure is a stepless locking structure, and there is no loss of parking force after parking, with high parking efficiency and high safety and reliability; in addition, the parking locking force can be accurately controlled, which has an inherent advantage over the traditional hand brake control by manual experience, and has high safety and reliability. Description of the Drawings

[0022] Figure 1 is the overall structural schematic diagram of the embodiment of the present application.

[0023] Figure 2 is the structural schematic diagram for showing the amplification module, the steering module and the self-locking module.

[0024] Figure 3 is the cross-sectional view of the embodiment of the present application.

[0025] Reference numerals: 1, support member; 2, driving member; 3, bearing; 4, connecting head; 5, connecting member; 6, guiding portion; 7, mounting portion; 8, worm gear; 9, worm; 10, mounting hole; 11, keyway; 12, driving key; 13, driving groove; 14, manual member; 15, transmission gear; 16, driving gear; 23, auxiliary bearing; 24, auxiliary bearing seat; 25, cable connector; 26, transmission portion. Detailed implementation manners

[0026] The following details the implementation manners of the present application, and the examples of the implementation manners are shown in the accompanying drawings.

[0027] In the description of this specification, the description with reference to the terms "certain implementation manners", "one implementation manner", "some implementation manners", "schematic implementation manners", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the implementation manner or example are included in at least one implementation manner or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same implementation manner or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more implementation manners or examples.

[0028] An electric parking brake for a railway vehicle is disclosed in an embodiment of the present application. Referring to Figure 1 , it includes a support member 1 with a hollow interior. A driving member 2 is slidably disposed within the support member 1. The driving member 2 is preferably a trapezoidal nut with a hollow interior. A parallel surface that abuts against the plane of the driving member 2 is provided on the inner wall of the support member 1 to ensure that the driving member 2 does not rotate relative to the support member 1. A bearing 3 is fixed within the support member 1, and the driving member 2 is inserted through the bearing 3 to ensure the smooth movement of the driving member 2. The support member 1 is preferably a cylindrical support tube 1 to enable the driving rod to slide axially along the support tube.

[0029] Referring to Figure 1 and Figure 2 , one end of the driving member 2 is located within the support member 1, and a connecting head 4 is fixed to the other end of the driving member 2. The connecting head 4 is preferably a fork-shaped push rod. One end of the connecting head 4 is fixed to the driving member 2, and a connecting member 5 is fixed to the other end of the connecting head 4. The connecting member is preferably a chain, and the end of the connecting member 5 is connected to the foundation braking device. After the vehicle stops, at this time, the driving member 2 is controlled to retract. The connecting member 5 is connected to the head of the foundation braking device through a pulley group. After being tightened to the required value, the tread braking on the wheels can be applied and maintained to achieve the parking function; when the vehicle needs to relieve the braking, the driving member 2 is controlled to extend, and the connecting member 5 is relaxed, which will not affect the relief of the vehicle. The electric parking brake can achieve the function of a hand brake, is convenient to operate, saves time and effort, the locking force can be precisely controlled, and it is safe and reliable.

[0030] Referring to Figure 2 andFigure 3 On the support member 1, there are also provided an amplification module, a steering module, and a self-locking module for enabling the driving member 2 to slide axially along the support member 1. The amplification module is used to achieve the purpose of labor-saving driving, the steering module is used to change the direction of force for easy operation, and the self-locking module is used to achieve locking. The amplification module, the steering module, and the self-locking module include a guiding portion 6 inserted into the driving member 2 and threadedly connected to the driving member 2. The amplification module, the steering module, and the self-locking module also include a driving mechanism for rotating the guiding portion 6. During the rotation of the guiding portion 6, the driving member 2 is driven to move linearly. The end of the support member 1 facing away from the connecting member 5 is fixed with a mounting portion 7 by bolts. The mounting portion 7 is preferably a mounting plate or a mounting box. The driving mechanism includes a worm gear 8 rotatably connected to the mounting portion 7 and a worm 9 meshing with the worm gear 8. An installation hole 10 penetrating the worm gear 8 is coaxially provided on the worm gear 8. A transmission portion 26 is integrally formed on the guiding portion 6. The transmission portion is preferably a transmission rod. The transmission portion 26 is inserted into the installation hole 10. Key grooves 11 communicating with each other are provided on the worm gear 8 and the transmission portion 26. A transmission key 12 for driving the guiding portion 6 to rotate by the worm gear 8 is installed in the key grooves 11.

[0031] Refer to Figure 2 and Figure 3 , the driving mechanism further includes a driving component for rotating the worm gear 8. The driving component includes a manual driving component and an electric driving component. A polygonal driving groove 13 is coaxially provided at the end of the worm 9. The manual driving component includes a manual member 14 with an end inserted into the driving groove 13 and detachably connected to the driving groove 13. The manual member is preferably a wrench. By acting on the worm 9 with the manual member 14, the worm 9 drives the worm gear 8 to rotate. The electric driving component includes a transmission gear 15 coaxially fixed on the worm 9 and a driving gear 16 rotatably connected to the mounting portion 7 and meshing with the transmission gear 15. A power member is fixed on the mounting portion 7. The power member includes a fixedly installed rotating motor. The output shaft of the rotating motor is coaxially fixed on the rotating shaft of the driving gear 16. A power connection port for a mobile power source is provided on the rotating motor. By connecting the mobile power source carried by the carriage or the staff to the corresponding connection port, the rotation of the driving gear 16 is controlled. The staff can select the corresponding driving component according to the actual situation for work.

[0032] Refer to Figure 2 and Figure 3 , auxiliary bearings 23 and auxiliary bearing seats 24 for positioning the worm gear 8 axially are fixed on both axial sides of the worm gear 8. The setting of the auxiliary bearings 23 and the auxiliary bearing seats 24 enables the worm gear 8 and the guiding portion 6 to only transmit torque and not axial force to a certain extent, ensuring that the force of the pressure sensor 18 is consistent with the force of the guiding portion 6.

[0033] Refer to Figure 1 and Figure 2, a cable connector 25 that is connected to a power source and is convenient for external connection is provided on the installation part 7. The corresponding controller and display are connected through the cable connector 25. During actual operation, a control box can be formed by combining a battery, a controller, a display, etc., which can be carried around and operated according to corresponding steps, enabling functions such as displaying the parking force magnitude, parking state, and release state. At the same time, functions such as anti-omission alarm are set to achieve the purpose of preventing errors and making the operation traceable.

[0034] The implementation principle of the embodiment of this application is as follows: After the vehicle stops, by controlling the driving member 2 to retract, the connecting member 5 is connected to the basic braking device through a pulley group. After tightening to the required value, the braking of the wheels can be maintained to achieve the parking function; when the vehicle needs to release the brake, by controlling the driving member 2 to extend, the connecting member 5 is relaxed, so as not to affect the release of the vehicle. The operation of the present invention is convenient, time-saving and labor-saving. Compared with the traditional mechanical holding type electric parking device, it has the function of actively generating a parking force, can be not affected by the original vehicle brake, and can achieve secondary parking after the parking is released. At the same time, compared with the traditional stepped parking locking structure, this structure is a stepless locking structure, and there is no parking force loss after parking, with high parking efficiency and high safety and reliability; in addition, the parking locking force can be precisely controlled, which has an inherent advantage over the traditional hand brake control based on manual experience, and has high safety and reliability.

[0035] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. An electric parking device for railway vehicles, characterized in that: The invention comprises a support member (1), a driving member (2) is slidably arranged inside the support member (1), a connecting head (4) is fixed at the end of the driving member (2), one end of the connecting head (4) is fixed on the driving member (2), and the other end is fixed to a connecting member (5), the end of the connecting member (5) is connected to a basic braking device, and an amplification module for easy operation and labor saving, a steering module for changing the direction of force, and a self-locking module for locking are also arranged on the support member (1), and the amplification module, the steering module and the self-locking module are used to make the driving member (2) slide and lock and prevent the movement of a vehicle connected to the connecting member (5).

2. The electric parking device for railway vehicles according to claim 1, characterized in that: The amplification module, the steering module and the self-locking module comprise a guide portion (6) threadedly connected to the driving member (2), the guide portion (6) guiding and driving the driving member (2), and the amplification module, the steering module and the self-locking module also comprise a driving mechanism for rotating the guide portion (6) and causing the driving member (2) to move in a straight line.

3. The electric parking device for railway vehicles according to claim 2, characterized in that: A mounting portion (7) is fixed on the support member (1), and the driving mechanism comprises a worm wheel (8) rotatably connected to the mounting portion (7), and a worm (9) meshing with the worm wheel (8); a mounting hole (10) is provided on the worm wheel (8); a transmission portion (26) is connected to the end of the guide portion (6), and the transmission portion (26) is inserted into the mounting hole (10); a transmission key (12) is provided on the worm wheel (8) for driving the transmission portion (26) to rotate synchronously; and the driving mechanism further comprises a driving component for rotating the worm wheel (8).

4. The electric parking device for railway vehicles according to claim 3, characterized in that: The drive assembly comprises a manual drive assembly and an electric drive assembly. The manual drive assembly comprises a manual member (14) detachably connected to the worm (9) and driving the worm (9) to rotate. The electric drive assembly comprises a transmission gear (15) coaxially fixed to the worm (9), a drive gear (16) rotatably connected to the mounting portion (7) and meshing with the transmission gear (15). A power member is fixed to the mounting portion (7) and drives the drive gear (16) to rotate.

5. The electric parking device for railway vehicles according to claim 4, characterized in that: The power part comprises a rotating motor for rotating a driving gear (16), and a power connection port for a mobile power source is provided on the rotating motor.

6. The electric parking device for railway vehicles according to claim 5, characterized in that: A bearing (3) is fixed inside the support member (1), and the driving member (2) is inserted into the bearing (3).

7. The electric parking device for railway vehicles according to claim 6, characterized in that: An auxiliary bearing (23) and an auxiliary bearing seat (24) for axially positioning the worm wheel (8) are fixed on both axial sides of the worm wheel (8).

8. The electric parking device for railway vehicles according to claim 7, characterized in that: The mounting portion (7) is provided with a cable connector (25) which is connected to a power source and is convenient for connecting to the outside, and a corresponding controller and display are connected via the cable connector (25).

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