Railway locomotive wheelset shaft and motor coaxial transmission device

Abstract

The utility model discloses a track locomotive wheel pair axle and motor coaxial transmission device, including permanent magnet direct drive motor body and wheel pair axle, the motor stator is arranged in the casing of permanent magnet direct drive motor body, the motor rotor is rotatably installed in the motor stator, the both ends of motor rotor are through motor bearing and casing end cap rotation cooperation respectively, the motor stator and motor rotor between leave and set a certain gap, the large diameter section of wheel pair axle is inserted in the motor rotor and is with motor rotor interference fit, the utility model relates to track locomotive drive mechanism technical field, adds split type rotation support assembly outside motor casing end cap, utilizes split type rotation support assembly to provide rotation support for wheel pair axle, further enhanced the connection stability and operation reliability that wheel pair axle and motor coaxial arrangement, adopt split type and the structure design of assembly type, can replace the support bearing under the condition of not disassembling wheel pair and motor.

Description

Technical Field

[0001] This utility model relates to the technical field of rail locomotive drive mechanism, specifically a rail locomotive wheel axle and motor coaxial transmission device. Background Technology

[0002] With the advancement of permanent magnet motor technology, more and more rail vehicles are adopting bogies with direct drive from permanent magnet motors. The permanent magnet direct drive system eliminates components such as reducers and differentials found in traditional transmission systems, eliminating mechanical losses caused by gear transmissions, and improving the overall system efficiency to over 96%. For example, Chinese patent application CN201720268521.4 discloses a transmission device in which the wheel axle and motor of a rail locomotive run coaxially; another example is Chinese patent application 202121402781.9, which discloses a gearless transmission charging and energy storage permanent magnet direct drive electric locomotive bogie. Both of these solutions use a permanent magnet direct drive motor to directly drive the wheel axle, achieving direct drive of the wheel axle. However, in these technical solutions, the motor housing end provides coaxial rotational support for the wheel axle through an embedded bearing. Once the bearing is damaged, disassembly and replacement are difficult. Therefore, this case arose from in-depth research into these issues. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a coaxial transmission device for the wheel set axle and motor of a railcar, thus solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a coaxial transmission device for a track vehicle's wheel axle and motor, comprising a permanent magnet direct drive motor body and a wheel axle. A motor stator is housed within the casing of the permanent magnet direct drive motor body, and a motor rotor is rotatably mounted within the motor stator. Both ends of the motor rotor are rotatably fitted to the casing end cover via motor bearings. A certain gap is maintained between the motor stator and the motor rotor. The large-diameter section of the wheel axle is inserted into the motor rotor and interference-fitted with it. Flange seats are symmetrically welded onto the casing end cover. The flange seats are coaxially arranged with the motor rotor and the wheel axle. A split-type rotating support assembly is mounted and connected to the flange seats. The split-type rotating support assembly consists of upper and lower parts that are connected to each other by bolts.

[0005] The aforementioned split-type rotating support assembly includes two half-flanges assembled and connected to a flange seat. A transition shell is welded to one end of each half-flange, and a semi-circular bearing seat is welded to one end of the transition shell. A split rolling bearing is disposed inside the semi-circular bearing seat, and the inner ring of the split rolling bearing is in contact and fixed with the shaft diameter section of the wheelset shaft.

[0006] The two semi-circular bearing seats are fixed together by bolts to form a complete bearing hole, which is used to squeeze and limit the bearing shell, so that the inner ring of the bearing shell is squeezed and fixed to the outer ring surface of the wheel set shaft.

[0007] The aforementioned transition shell has connecting seats welded to both sides, and the connecting seats are assembled and fixed together by bolts.

[0008] The aforementioned semi-circular bearing housing has an oil injection hole on its side, and the end of the oil injection hole is a threaded hole, into which a sealing bolt is screwed.

[0009] The aforementioned housing is equipped with a mounting base that matches the motor suspension bracket.

[0010] This utility model provides a coaxial transmission device for the wheelset axle and motor of a rail locomotive. It offers the following advantages: This coaxial transmission device improves upon the existing connection structure between the permanent magnet direct-drive motor body and the wheelset axle. A split-type rotating support assembly is added to the outside of the motor housing end cover. This assembly provides rotational support for the wheelset axle, further enhancing the connection stability and operational reliability of the coaxial arrangement between the wheelset axle and the motor. The split and assembled structural design allows for replacement of the support bearing without disassembling the wheelset and motor. The compact structure and convenient maintenance significantly improve the operational stability of the rail locomotive. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the coaxial transmission device for the wheel set axle and motor of the track machine described in this utility model.

[0012] Figure 2 This is a side view sectional structural schematic diagram of the coaxial transmission device for the wheel set axle and motor of the track machine described in this utility model.

[0013] Figure 3 This is a partially exploded structural diagram of the split-type rotating support assembly described in this utility model.

[0014] Figure 4 This utility model Figure 3 A schematic diagram of the isometric structure.

[0015] In the diagram: 1. Permanent magnet direct drive motor body; 2. Wheelset axle; 3. Motor stator; 4. Motor rotor; 5. Motor bearing; 6. Housing end cover; 7. Flange seat; 8. Half flange; 9. Transition shell; 10. Semi-circular bearing seat; 11. Split rolling bearing; 12. Connecting seat; 13. Bolted connector; 14. Oil injection hole; 15. Sealing bolt; 16. Assembly seat. 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 a coaxial transmission device for a track vehicle wheelset axle 2 and a motor, including a permanent magnet direct drive motor body 1 and a wheelset axle 2. A motor stator 3 is disposed within the housing of the permanent magnet direct drive motor body 1, and a motor rotor 4 is rotatably mounted within the motor stator 3. Both ends of the motor rotor 4 are rotatably engaged with the housing end cover 6 via motor bearings 5. A certain gap is left between the motor stator 3 and the motor rotor 4. The large-diameter section of the wheelset axle 2 is inserted into the motor rotor 4 and is interference-fitted with it. Flange seats 7 are symmetrically welded onto the housing end cover 6. The flange seats 7 are coaxially arranged with the motor rotor 4 and the wheelset axle 2, and are equipped with... The system is equipped with a split-type rotating support assembly, which consists of upper and lower parts connected by bolts. This improves the existing connection structure between the permanent magnet direct drive motor body 1 and the wheelset axle 2. A split-type rotating support assembly is added to the outside of the motor housing end cover to provide rotational support for the wheelset axle 2. This further enhances the connection stability and operational reliability of the wheelset axle 2 and the motor, which are arranged coaxially. The split and assembled structural design allows for the replacement of the support bearing without disassembling the wheelset and motor. The structure is compact, maintenance is convenient, and the operational stability of the rail locomotive can be greatly improved.

[0018] In the specific implementation process, the above-mentioned split-type rotating support assembly includes two half-flanges 8 assembled and connected to the flange seat 7. A transition shell 9 is welded to one end of the half-flange 8, and a semi-circular bearing seat 10 is welded to one end of the transition shell 9. A split rolling bearing 11 is provided inside the semi-circular bearing seat 10. The inner ring of the split rolling bearing 11 contacts and is fixed to the shaft diameter section of the wheelset shaft 2. The upper and lower semi-circular bearing seats 10 are fixed together by bolts to form a complete bearing hole, which is used to compress and limit the bearing bush, so that the inner ring of the bearing bush is compressed and fixed to the outer ring surface of the wheelset shaft 2. Connecting seats 12 are welded to both sides of the transition shell 9, and the connecting seats 12 are connected by bolts 13. The wheelset axle 2 is fixed by two semi-circular bearing seats 10 forming a complete bearing hole. A split rolling bearing 11 is installed in the bearing hole to provide rotational support for the wheelset axle 2. The semi-circular bearing seat 10, transition shell 9, and semi-flange 8 adopt an integrated structural design and can be assembled and connected with the flange. When the split rolling bearing 11 needs to be replaced or maintained, simply remove the bolts at the semi-flange 8 and disassemble the bolt connection 13 between the two bearing seats and the connecting seat 12. The structure is simple and easy to operate, without the need to disassemble the motor and wheelset, which can greatly improve the efficiency of maintenance.

[0019] In the specific implementation process, as a preferred setting, the side of the above-mentioned semi-circular bearing seat 10 is provided with an oil injection hole 14, the end of the oil injection hole 14 is a threaded hole, and the sealing bolt 15 is screwed into the threaded hole to facilitate the addition of lubricating oil into the semi-circular bearing seat 10.

[0020] In practice, as a preferred embodiment, the exterior of the aforementioned housing is provided with a mounting base that matches the motor suspension bracket. This facilitates the assembly and connection of the permanent magnet direct drive motor body 1 with the motor suspension bracket on the guide frame.

[0021] 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. A coaxial transmission device for a track vehicle's wheelset axle and motor, comprising a permanent magnet direct-drive motor body and a wheelset axle, characterized in that, The permanent magnet direct drive motor body has a motor stator installed inside the housing, and a motor rotor is rotatably mounted inside the motor stator. The two ends of the motor rotor are rotatably engaged with the housing end cover through motor bearings. A certain gap is left between the motor stator and the motor rotor. The large diameter section of the wheelset axle is inserted into the motor rotor and is interference-fitted with the motor rotor. Flange seats are symmetrically welded on the housing end cover. The flange seats are arranged coaxially with the motor rotor and the wheelset axle. A split-type rotating support assembly is assembled and connected to the flange seats. The split-type rotating support assembly is divided into upper and lower parts and is connected to each other by bolts.

2. The track machine wheelset axle and motor coaxial transmission device according to claim 1, characterized in that, The split-type rotating support assembly includes two half-flanges assembled and connected to a flange seat. A transition shell is welded to one end of each half-flange, and a semi-circular bearing seat is welded to one end of the transition shell. A split rolling bearing is installed inside the semi-circular bearing seat, and the inner ring of the split rolling bearing is in contact and fixed with the shaft diameter section of the wheelset axle.

3. The track machine wheel axle and motor coaxial transmission device according to claim 2, characterized in that, The upper and lower semi-circular bearing seats are fixed together by bolts to form a complete bearing hole, which is used to squeeze and limit the bearing shell, so that the inner ring of the bearing shell is squeezed and fixed to the outer ring surface of the wheelset shaft.

4. The track machine wheel axle and motor coaxial transmission device according to claim 2, characterized in that, The transition shell is welded to both sides with connecting seats, and the connecting seats are assembled and fixed together by bolts.

5. The track machine wheel axle and motor coaxial transmission device according to claim 2, characterized in that, The side of the semi-circular bearing seat is provided with an oil injection hole, and the end of the oil injection hole is a threaded hole, into which the sealing bolt is screwed.

6. The track machine wheel axle and motor coaxial transmission device according to claim 1, characterized in that, The outer side of the housing is provided with a mounting base that matches the motor suspension bracket.

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