A floating rail vehicle wheel axle power generation device

Abstract

This utility model discloses a floating rail vehicle wheel axle power generation device, relating to the field of rail vehicle technology. The power generation device includes a gear pair commutator, a drive shaft, and a power generation mechanism. One end of the gear pair commutator is connected to the wheel axle end of the rail vehicle, and it also includes a mounting base plate and at least one connecting rod. The power generation mechanism is fixedly mounted on the mounting base plate. One end of the connecting rod is hinged to the mounting base plate, and the other end is hinged to the vehicle body. The connecting rod and the mounting base plate are arranged in an "L" shape. The output end of the gear pair commutator is connected to the input end of the power generation mechanism through the drive shaft. This utility model shortens the transmission distance between the power generation mechanism and the gear pair commutator, solving the defects of low efficiency, easy wear, and short lifespan of the original long-distance flexible shaft transmission, and can adapt to displacement and attitude changes caused by load, curves, etc. during vehicle operation.

Description

Technical Field

[0001] This utility model relates to the field of rail vehicle technology, specifically to a floating rail vehicle wheel axle power generation device. Background Technology

[0002] Rail vehicles, especially railway freight vehicles, suffer from a lack of stable onboard power, severely hindering their intelligent and digital development. To address this issue, self-generating power technology has become an important direction. Chinese patent CN222509024U proposes a rail vehicle axle-end power generation device. This device transmits axle power to a generator located beneath the car body via a gear pair commutator and a flexible drive shaft, effectively avoiding the weight safety hazards and bearing erosion risks associated with directly mounting the generator at the axle end. However, this solution still has room for optimization: First, long-distance flexible shaft transmission suffers from transmission efficiency loss, and the flexible shaft is prone to fatigue wear under long-term high torque and alternating loads, resulting in reduced service life and reliability. Second, to accommodate the relative movements between the car body and bogie during vehicle operation (such as pitching, rolling, and twisting), a highly flexible flexible shaft must be used, but this limits further increases in transmission power and speed, making it difficult to meet the demand for higher power generation. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a floating rail vehicle wheel axle power generation device that can further improve transmission efficiency, reliability, and power limit, and better adapt to the complex relative motion between the car body and the bogie.

[0004] The technical solution adopted by this utility model is as follows: A floating rail vehicle wheel axle power generation device includes a gear pair commutator, a drive shaft, and a power generation mechanism; one end of the gear pair commutator is connected to the wheel axle end of the rail vehicle, and it also includes a mounting base plate and at least one connecting rod; the power generation mechanism is fixedly mounted on the mounting base plate; one end of the connecting rod is hinged to the mounting base plate, and the other end is hinged to the vehicle body; the connecting rod and the mounting base plate are arranged in an "L" shape; the output end of the gear pair commutator is connected to the input end of the power generation mechanism through the drive shaft.

[0005] Furthermore, the hinges at both ends of the connecting rod are provided with a spatial hinge structure that provides multi-degree-of-freedom swing.

[0006] Furthermore, the spatial hinge structure is a universal hinge or a spherical bearing.

[0007] Furthermore, it also includes a speed-increasing mechanism, wherein the output end of the gear pair commutator is connected to the input end of the speed-increasing mechanism via the transmission shaft, and the output end of the speed-increasing mechanism is connected to the input end of the power generation mechanism.

[0008] Furthermore, the speed-increasing mechanism is a planetary gear speed-increasing gearbox.

[0009] Furthermore, the planetary gear speed increaser and the power generation mechanism are integrated and packaged into a single unit, and are jointly fixed on the mounting base plate.

[0010] Furthermore, the drive shaft is a rigid drive shaft.

[0011] Furthermore, universal couplings are provided at both ends of the rigid transmission shaft.

[0012] Furthermore, the power generation mechanism is a high-speed permanent magnet synchronous generator.

[0013] Furthermore, it also includes an energy storage mechanism, which is installed on the vehicle body and electrically connected to the power generation mechanism for storing the electrical energy generated by the power generation mechanism.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) By connecting the generator mechanism to the vehicle body through the mounting plate and the hinged connecting rod, the generator mechanism can be arranged closer to the gear pair commutator. This avoids the safety hazards caused by installing large mass components on the axle end, does not increase the weight of the wheel axle end, and avoids the risk of electrolytic corrosion of the axle end bearing caused by the generator magnetic lines and leakage current. It also significantly shortens the transmission distance between the generator mechanism and the gear pair commutator. The significant reduction in transmission distance fundamentally reduces the requirements for the flexibility and compensation capability of the transmission components, making it possible to use a rigid transmission shaft with higher transmission efficiency and stronger torque bearing capacity as the preferred solution. This solves the defects of low efficiency, easy wear and short life of the original long-distance soft shaft transmission.

[0016] (2) As an integrated part of the linkage structure, the power generation mechanism can effectively adapt to the vertical displacement of the car body under different conditions such as no load and load, as well as the complex compound motion caused by the difference between the inner and outer rails when the bogie is going through a bend, by setting multiple rotatable hinge points. This design can compensate for the large gap relative displacement between the car body and the bogie, and ensure that the gear pair commutator, drive shaft, speed-increasing mechanism and power generation mechanism are always within the effective transmission range, thereby maintaining the continuous stability of the power transmission path, avoiding transmission jamming or abnormal wear of components, and adapting to the displacement and attitude changes caused by load, bends and other factors during vehicle operation.

[0017] (3) By adding a speed-increasing mechanism in the transmission chain, the low speed of the axle (not more than 1000 rpm) is increased to the high-efficiency working range of the generator, so that the device can be matched with a miniaturized and lightweight high-speed generator, which significantly improves the power generation while reducing the total volume and weight of the power generation unit.

[0018] (4) The entire power generation unit is designed as multiple modules that are easy to quickly replace, which greatly reduces the technical difficulty and time cost of on-site maintenance, transfers complex maintenance work to a professional factory environment, maximizes vehicle operating efficiency, and is conducive to standardized control of maintenance quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation

[0020] To facilitate understanding of this utility model, it will be described more comprehensively and in detail below with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.

[0021] like Figure 1 As shown, this embodiment provides a floating rail vehicle wheel axle power generation device, including a gear pair commutator 1, a drive shaft 2, and a power generation mechanism 5; one end of the gear pair commutator 1 is connected to the wheel axle end of the rail vehicle. The core improvement of this utility model lies in the installation layout of the power generation mechanism and the optimization of the transmission system.

[0022] In this embodiment, the power generation mechanism 5 is fixedly mounted on a rigid mounting base 3. The mounting base 3 can be made of metal materials such as steel plates, and has sufficient strength and rigidity to support the power generation mechanism 5 and its related components. One end of the mounting base 3 is hinged to a connecting rod 6 via a hinge seat, and the other end of the connecting rod 6 is hinged to a connecting seat fixed on the vehicle body. The connecting rod 6 and the mounting base 3 are in an "L"-shaped center of gravity position, so that the combined weight of the gear pair commutator 1, drive shaft 2, mounting base 3, speed-increasing mechanism 4, and power generation mechanism 5 is borne by the connecting rod 6, without adding additional weight to the wheel axle end.

[0023] Based on the aforementioned mounting mechanism, the generator mechanism 5 can be positioned close to the output end of the gear pair commutator 1, significantly reducing the straight-line distance between them. The output end of the gear pair commutator 1 is connected to the input end of the generator mechanism 5 via the drive shaft 2. Due to the short transmission distance, the flexibility requirement of the drive shaft itself is greatly reduced. Therefore, this embodiment preferably uses a short, rigid drive shaft as the connection structure. This rigid drive shaft has high torque transmission, high transmission efficiency, good rigidity, and long service life. To further compensate for minor alignment errors, universal couplings can be installed at both ends of the rigid drive shaft.

[0024] The design of link 5 forms a floating support mechanism, which effectively absorbs and compensates for the relative displacement and angle changes between the vehicle body and the gear pair commutator 1 mounted on the bogie during vehicle operation, turning, and switching between no-load and full-load states, achieving adaptive adjustment, specifically including:

[0025] (1) Adaptive adjustment mechanism for changes in no-load / load height

[0026] When the rail vehicle car is unloaded or loaded, a height difference of approximately 100mm will occur between it and the wheel axle (lifting or lowering in the Z direction). The device achieves self-adaptation through a "multi-degree-of-freedom floating structure": the hinge shafts at both ends of the connecting rod 6 and the input shaft of the gear pair commutator 1 can rotate freely in the Y direction (wheel axis); the connecting hinge between the connecting rod 6 and the mounting base plate 3 can float up and down in the Z direction and can rotate around the input shaft of the gear pair commutator 1. The degrees of freedom of movement of the above structure allow the mounting base plate 3 and related components such as the gear pair commutator 1 and the drive shaft 2 to adjust their posture synchronously with the height difference between the car and the wheel axle, ensuring that the power transmission path remains stable and avoiding transmission jamming or component damage due to height changes.

[0027] (2) Displacement change mechanism of adaptive bogie cornering

[0028] When the vehicle passes through a curve, the bogie and the car body rotate at an angle of 6 to 8 degrees around the bogie core, accompanied by a maximum displacement of approximately 160 mm in the X and Y directions. The device achieves displacement compensation through "linkage compound motion". The hinges at both ends of the link 6 adopt a multi-degree-of-freedom swinging spatial hinge structure that can rotate in both the X and Y directions, such as universal hinges or spherical bearings. During the curve, the link 6 moves by its own push / pull movement, combined with the compound rotation of the hinges at both ends, to compensate for the X and Y displacements between the bogie and the car body in real time. This ensures that components such as the gear pair commutator 1, drive shaft 2, speed-increasing mechanism 4, and power generation mechanism 5 are always within the effective transmission range, avoiding power interruption or component wear.

[0029] In this embodiment, to further improve performance, a speed-increasing mechanism 4 can be added between the drive shaft 2 and the input end of the generator mechanism 5. The speed-increasing mechanism 4 can be a planetary gear speed-increasing box, integrated with the generator mechanism 5 as a single unit, and fixed together on the mounting base plate 3. The input end of the speed-increasing mechanism 4 is connected to the output end of the drive shaft 2, and its output end is connected to the rotor main shaft of the generator. The speed-increasing mechanism 4 increases the low speed of the axle (≤1000 RPM) to the high-efficiency operating speed required by the generator, allowing for the selection of a smaller, lighter, and more powerful high-speed permanent magnet synchronous generator, thereby increasing the output power while achieving miniaturization and weight reduction of the overall generator unit.

[0030] In this embodiment, an energy storage mechanism is also included. The energy storage mechanism is installed on the vehicle body and electrically connected to the power generation mechanism 5. It is used to store the electrical energy generated by the power generation mechanism 5 and to supply power to the vehicle load.

[0031] With the aid of the teachings present in the foregoing description and related drawings, those skilled in the art will conceive of many modifications and other embodiments of the present invention. Therefore, it is to be understood that the present invention is not limited to the specific embodiments disclosed, and modifications and other embodiments are considered to be included within the scope of the appended claims. Although specific terms are used herein, they are used in a general and descriptive sense only and are not intended to be limiting.

Claims

1. A floating rail vehicle wheel axle power generation device, comprising a gear pair commutator (1), a drive shaft (2), and a power generation mechanism (5); one end of the gear pair commutator (1) is connected to the wheel axle end of the rail vehicle, characterized in that, It also includes a mounting base plate (3) and at least one connecting rod (6), the power generation mechanism (5) is fixedly mounted on the mounting base plate (3); one end of the connecting rod (6) is hinged to the mounting base plate (3) and the other end is hinged to the vehicle body, the connecting rod (6) and the mounting base plate (3) are arranged in an "L" shape; the output end of the gear pair commutator (1) is connected to the input end of the power generation mechanism (5) through the transmission shaft (2).

2. The floating rail vehicle wheel axle power generation device as described in claim 1, characterized in that: The connecting rod (6) is provided with a spatial hinge structure at the hinge joints at both ends, which provides multiple degrees of freedom for swinging.

3. The floating rail vehicle wheel axle power generation device as described in claim 2, characterized in that: The spatial hinge structure is a universal hinge or a spherical bearing.

4. The floating rail vehicle wheel axle power generation device as described in claim 1, characterized in that: It also includes a speed-increasing mechanism (4), the output end of the gear pair commutator (1) is connected to the input end of the speed-increasing mechanism (4) through the transmission shaft (2), and the output end of the speed-increasing mechanism (4) is connected to the input end of the power generation mechanism (5).

5. A floating rail vehicle wheel axle power generation device as described in claim 4, characterized in that: The speed-increasing mechanism (4) is a planetary gear speed-increasing box.

6. A floating rail vehicle wheel axle power generation device as described in claim 5, characterized in that: The planetary gear speed increaser and the power generation mechanism (5) are integrated and packaged into a single unit and fixed together on the mounting base plate (3).

7. A floating rail vehicle wheel axle power generation device as described in claim 1, characterized in that: The drive shaft (2) is a rigid drive shaft (2).

8. A floating rail vehicle wheel axle power generation device as described in claim 7, characterized in that: Universal couplings are provided at both ends of the rigid transmission shaft (2).

9. A floating rail vehicle wheel axle power generation device as described in claim 1, characterized in that: The power generation mechanism (5) is a high-speed permanent magnet synchronous generator.

10. A floating rail vehicle wheel axle power generation device as described in any one of claims 1-9, characterized in that: It also includes an energy storage mechanism, which is installed on the vehicle body and electrically connected to the power generation mechanism (5) for storing the electrical energy generated by the power generation mechanism (5).

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