Intelligent direct-drive motor adjustable bogie for rail locomotives

Abstract

This utility model discloses an intelligent direct-drive adjustable bogie for rail locomotives, including a three-axle bogie frame. Three permanent magnet variable frequency motors are mounted within the three-axle bogie frame via suspension supports. A rotating support component is provided within the axle box end cover. This utility model relates to the field of rail locomotive bogie technology. By using the motor shafts of the three permanent magnet variable frequency motors as wheelset axles, direct-drive control of the wheelsets is achieved, reducing a series of transmission components such as gearboxes and significantly improving transmission efficiency. The rotary transformer adopts an assembled design, directly mounted on the outside of the axle box end cover and connected to the wheelset axle via the rotating support component. This enables real-time monitoring of the wheelset axle rotation angle signal and forms a closed-loop vector control system with the motor controller, thereby precisely controlling the smooth operation of the electric locomotive. When the rotary transformer needs to be replaced, there is no need to disassemble the axle box end cover.

Description

Technical Field

[0001] This utility model relates to the field of rail locomotive bogie technology, specifically to an adjustable bogie with an intelligent direct-drive motor for rail locomotives. Background Technology

[0002] New energy rail traction locomotives are rail vehicles that use batteries to power drive motors. Currently, new energy locomotives are becoming a development trend due to their advantages such as energy saving, environmental protection, high level of intelligence, and low operation and maintenance costs, aligning with the global pursuit of green and low-carbon development. Chinese patent application number 202121402781.9 discloses a gearless permanent magnet direct-drive electric locomotive bogie. By using a rotary transformer installed on the axle box end cover and rotating synchronously with the traction motor, it accurately collects the rotation angle signal of the traction motor, thereby improving the operational stability of the rail locomotive. This solves the problem of difficult disassembly, assembly, and maintenance of the rotary transformer due to the coaxiality of the traction motor shaft and the relatively thick axle. However, the above technical solutions still have the following technical defects in practical applications: 1. With only a dual-motor setup, if one motor fails, the remaining motor cannot guarantee to provide stable traction, affecting the safety of the rail locomotive operation; 2. The rotary transformer is directly exposed at the end of the wheelset axle, making it extremely susceptible to impact and damage. Repair and replacement require complete removal of the axle box end cover, which is quite cumbersome. In view of this, in-depth research was conducted on the above problems, which led to this case. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an adjustable bogie with an intelligent direct-drive motor for rail locomotives, thus solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: an adjustable bogie with intelligent direct drive motor for rail locomotives, including a three-axle bogie frame for rail locomotives. Three sets of permanent magnet variable frequency motors are installed in the three-axle bogie frame for rail locomotives via suspension supports. The motor shafts of the permanent magnet variable frequency motors are used as wheelset axles, and locomotive wheelsets are symmetrically cold-pressed on both sides of the wheelset axles. The two ends of the wheelset axles are respectively connected to the guide frame via axle boxes. A rotating support member is provided inside the end cover of the axle box. One end of the rotating support member extends to the outside of the axle box end cover and is connected to a rotary transformer. A protective cover is fastened to the outside of the rotary transformer.

[0005] The aforementioned rotating support component includes an end cap assembled and connected to the end of the wheelset axle. A force transmission rod is fixedly welded to the center of the end cap. A flexible coupling is installed at the end of the force transmission rod. A fixed shaft is fixedly connected to one end of the flexible coupling. The fixed shaft and the axle box end cap are rotatably engaged by bearings.

[0006] The outer side of the housing of the aforementioned rotary transformer is welded with a flange, and the outer side of the shaft box end cover is welded with a flange seat. The flange seat is arranged concentrically with the fixed shaft. The mounting hole on the flange seat is provided with an internal thread, and a locking bolt is inserted into the outer side of the flange. The locking bolt is screwed into the internal thread.

[0007] The rotating shaft end of the aforementioned rotary transformer is provided with a connecting cap, the connecting cap having a spline groove, and the exposed end of the fixed shaft having a spline protrusion, the spline protrusion being inserted into the spline groove.

[0008] The top of the aforementioned protective cover is assembled and connected to the axle box end cover via a hinged seat, and the bottom of the protective cover is provided with an ear plate, which is assembled and fixed to the axle box end cover via limiting bolts.

[0009] The protective cover has a wiring hole on its side, through which the cable of the rotary transformer passes. Beneficial effects

[0010] This utility model provides an intelligent direct-drive adjustable bogie for rail locomotives. It offers the following advantages: This intelligent direct-drive adjustable bogie improves upon the existing three-axle bogie frame of rail locomotives by using the motor shafts of three permanent magnet variable frequency motors as wheel axles, thereby achieving direct-drive control of the wheelsets. This reduces the number of transmission components such as gearboxes, significantly improving transmission efficiency. The rotary transformer adopts a prefabricated design, directly mounted on the outside of the axle box end cover and connected to the wheel axle via a rotating support component. This allows for real-time monitoring of the wheel axle rotation angle signal and forms a closed-loop vector control system with the motor controller, thus precisely controlling the smooth operation of the electric locomotive. When the rotary transformer needs replacement, there is no need to disassemble the axle box end cover; simply open the protective cover and remove the rotary transformer, making maintenance extremely convenient. The three permanent magnet variable frequency motors operate in a two-in-one-out configuration. If one motor fails, the angle transformer on that wheel axle quickly receives the signal and sends it to the motor controller, which can then quickly start the backup motor, providing stable traction for the rail locomotive and enhancing its operational reliability. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the adjustable bogie with intelligent direct drive motor for rail locomotives described in this utility model.

[0012] Figure 2 This is a partial cross-sectional view of the adjustable bogie with intelligent direct drive motor for rail locomotives described in this utility model.

[0013] Figure 3 This is an isometric structural diagram of the connecting cap described in this utility model.

[0014] Figure 4 This is a schematic diagram of the isometric structure of the fixed shaft described in this utility model.

[0015] In the diagram: 1. Three-axle bogie frame of the rail locomotive; 2. Suspension support; 3. Permanent magnet variable frequency motor; 4. Wheelset axle; 5. Locomotive wheelset; 6. Axle box end cover; 7. Rotary transformer; 8. Protective cover; 9. Axle end cover; 10. Force transmission rod; 11. Flexible coupling; 12. Fixed shaft; 13. Flange; 14. Flange seat; 15. Locking bolt; 16. Connecting cap; 17. Spline groove; 18. Spline teeth; 19. Hinge seat; 20. Ear plate; 21. Limit bolt. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example: Refer to the appendix of the instruction manual Figure 1-4 As can be seen, this application specifically designs an intelligent direct-drive adjustable bogie for rail locomotives, including a three-axle bogie frame 1. Three sets of permanent magnet variable frequency motors 3 are installed within the three-axle bogie frame 1 via suspension supports 2. The motor shafts of the permanent magnet variable frequency motors 3 are used as wheelset axles 4, and locomotive wheelsets 5 are symmetrically cold-pressed onto both sides of the wheelset axles 4. Both ends of the wheelset axles 4 are connected to the guide frame via axle boxes. A rotating support component is provided inside the axle box end cover 6, with one end extending out of the axle box end cover 6 and connected to a rotary transformer 7. A protective cover 8 is fastened to the outside of the rotary transformer 7. This improves upon the existing three-axle bogie frame 1 for rail locomotives by using the motor shafts of the three sets of permanent magnet variable frequency motors 3 as wheelset axles 4, thereby achieving direct-drive control of the wheelsets and reducing the need for gearboxes and other components. The transmission components greatly improve transmission efficiency. The rotary transformer 7 adopts an assembly design and is directly installed on the outside of the axle box end cover 6 and connected to the wheelset axle 4 through a rotating support component. It can realize real-time monitoring of the rotation angle signal of the wheelset axle 4 and form a closed-loop vector control system with the motor controller, thereby accurately controlling the smooth operation of the electric locomotive. When the rotary transformer 7 needs to be replaced, there is no need to remove the axle box end cover 6. Simply open the protective cover 8 and remove the rotary transformer 7, making maintenance very convenient. The three permanent magnet variable frequency motors 3 are two in use and one in standby. Once a motor fails, the angle transformer on the wheelset axle 4 quickly receives the signal and sends it to the motor controller. The motor controller can quickly start the standby motor to run, thereby providing stable traction for the rail locomotive and ensuring the reliability of the electric locomotive operation.

[0018] In the specific implementation process, the aforementioned rotating support component includes a shaft end cover 9 assembled and connected to the end of the wheelset axle 4. A force transmission rod 10 is fixedly welded to the center of the shaft end cover 9. A flexible coupling 11 is installed at the end of the force transmission rod 10. A fixed shaft 12 is fixedly connected to one end of the flexible coupling 11. The fixed shaft 12 and the axle box end cover 6 are rotatably fitted by bearings. A flange 13 is welded to the outside of the housing of the rotary transformer 7. A flange seat 14 is welded to the outside of the axle box end cover 6. The flange seat 14 is concentrically arranged with the fixed shaft 12. An internal thread is opened in the mounting hole on the flange seat 14. An insert is installed on the outside of the flange 13. Locking bolt 15 is screwed into the internal thread. A connecting cap 16 is provided at the end of the rotating shaft of the rotary transformer 7. The connecting cap 16 has a spline groove 17. A spline tooth 18 is provided at the exposed end of the fixed shaft 12, and the spline tooth 18 engages with the spline groove 17. During installation, the shaft end cover 9 is assembled onto the end of the wheelset shaft 4. The inner ring of the center bearing of the axle box end cover 6 is fixedly fitted onto the fixed shaft 12, and the axle box end cover 6 is assembled and connected. At this time, the exposed end of the fixed shaft 12 remains outside the axle box end cover 6. The connecting cap 16 at the end of the rotating shaft of the rotary transformer 7 is then fastened onto the fixed shaft 12. At the exposed end, the connecting cap 16 and the fixed shaft 12 are engaged by a spline groove 17 and a spline tooth 18. After the connection is in place, the outer flange 13 of the rotary transformer 7 is assembled and connected to the flange seat 14 on the shaft box end cover 6 by locking bolts 15. The top of the protective cover 8 is assembled and connected to the shaft box end cover 6 by a hinge seat 19. The bottom of the protective cover 8 is provided with an ear plate 20, which is assembled and fixed to the shaft box end cover 6 by limiting bolts 21. A wiring hole is opened on the side of the protective cover 8 for the cable of the rotary transformer 7 to pass through. After the protective cover 8 is fastened, the limiting bolts 21 are used to secure it. Simply assemble and fix the ear plate 20 to the axle box end cover 6. When it is necessary to disassemble the rotary transformer 7, simply remove the limit bolt 21, flip up the protective cover 8, and then remove the locking bolt 15 on the flange 13 for replacement. The operation is convenient, time-saving and labor-saving, and there is no need to disassemble the axle box end cover 6. The three permanent magnet variable frequency motors are two in use and one in standby. Once a motor fails, the angle transformer on the wheelset axle quickly receives the signal and sends it to the motor controller. The motor controller can quickly start the standby motor to run, thereby providing stable traction for the rail locomotive and ensuring the reliability of the electric locomotive operation.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable bogie with intelligent direct drive motor for rail locomotives, comprising a three-axle bogie frame for rail locomotives, characterized in that, The three-axle bogie frame of the rail locomotive is equipped with three sets of permanent magnet variable frequency motors installed through suspension supports. The motor shaft of the permanent magnet variable frequency motor is used as a wheelset axle, and the locomotive wheelset is symmetrically cold-pressed on both sides of the wheelset axle. The two ends of the wheelset axle are connected to the guide frame through axle boxes. A rotating support component is provided in the end cover of the axle box. One end of the rotating support component extends to the outside of the axle box end cover and is connected to the rotary transformer. A protective cover is fastened to the outside of the rotary transformer.

2. The intelligent direct-drive motor adjustable bogie for rail locomotives according to claim 1, characterized in that, The rotating support component includes an end cap assembled and connected to the end of the wheelset axle. A force transmission rod is fixedly welded to the center of the end cap. A flexible coupling is installed at the end of the force transmission rod. A fixed shaft is fixedly connected to one end of the flexible coupling. The fixed shaft and the axle box end cap are rotatably engaged by bearings.

3. The intelligent direct-drive motor adjustable bogie for rail locomotives according to claim 2, characterized in that, A flange is welded to the outside of the housing of the rotary transformer, and a flange seat is welded to the outside of the shaft box end cover. The flange seat is arranged concentrically with the fixed shaft. An internal thread is provided in the mounting hole on the flange seat. A locking bolt is inserted into the outside of the flange and screwed into the internal thread.

4. The intelligent direct-drive motor adjustable bogie for rail locomotives according to claim 2, characterized in that, The rotating shaft end of the rotary transformer is provided with a connecting cap, the connecting cap is provided with a spline groove, and the exposed end of the fixed shaft is provided with spline teeth, the spline teeth and the spline groove are inserted into each other.

5. The intelligent direct-drive motor adjustable bogie for rail locomotives according to claim 1, characterized in that, The top of the protective cover is assembled and connected to the end cover of the axle box via a hinged seat, and the bottom of the protective cover is provided with an ear plate, which is assembled and fixed to the end cover of the axle box via limiting bolts.

6. The adjustable bogie with intelligent direct drive motor for rail locomotives according to claim 5, characterized in that, The protective cover has a wiring hole on its side, through which the cables of the rotary transformer pass.

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