Power bogie based on easy-to-withdraw shaft type gear box and side beam single-point suspension type motor

Abstract

The invention discloses a power bogie based on an easy-to-withdraw shaft type gear box and a side beam single-point suspension type motor, and belongs to the field of railway vehicle power bogie devices. The power bogie comprises a framework, a wheel set device composed of wheels and axles, the easy-to-withdraw shaft type gear box and the side beam single-point suspension type motor. On the premise that the mounting position and the vibration reduction index of the primary suspension axle box device are ensured, the transverse width size and the turning radius of the whole bogie are effectively reduced, the curve passing capacity of the bogie is further improved, and the annular vibration reduction axle box is convenient to mount, dismount and maintain; and after the four fastening bolts are respectively dismounted, the side beam single-point suspension type motor can be directly and independently dismounted from the lower part of the vehicle body through the maintenance trench.

Description

technical field [0001] The invention belongs to the field of rail vehicle power bogie devices, and in particular relates to a power bogie based on an easy-return shaft type gearbox and a side beam single-point suspension motor. Background technique [0002] The design of rail train bogies not only needs to comprehensively consider the structural strength of the main body of the load-bearing frame, the effect of various auxiliary damping components such as anti-snake dampers, and the installation method of the braking mechanism, but also needs to be aimed at different According to the requirements of the vehicle model, according to the theoretical speed of the train, the bearing load, the minimum curve curvature and the road conditions such as wind, snow and flying stones, the suspension mode of the power bogie motor, the layout space of the motor and its gearbox and many other factors are comprehensively designed. Various design schemes developed around the above-mentioned c...

AI Technical Summary

Problems solved by technology

However, in this installation method that relies on the power bogie frame g and is completely rigidly connected with the motor hanger t and the gearbox hanger u, the layout position and welding manufacturing process of the motor hanger t and the gear box hanger u are not only Higher requirements are put forward for the structural strength and symmetry accuracy of the beam body, and it also increases the overall structural size and radius of gyration of the bogie, which is not conducive to the improvement of its minimum curve passing capacity, and because the lifting lugs of the traction motor r shell It is a rigid structure that cannot be dismantled, so that it interferes with the frame and the gearbox structure and prevents the traction motor r from being directly removed from the bottom of the car body through the maintenance ditch. Separated, the traction motor r can be removed from the top of the frame, which greatly increases the difficulty of motor maintenance and replacement

At the same time, the rigid connection of the motor hanger t and the gearbox hanger u also leads to the lack of sufficient vibration reduction protection system for the traction motor r and the gearbox s, which in turn makes the auxiliary structures such as the anti-snake shock absorber and the anti-rolling torsion bar n Installation becomes an indispensable and necessary supplement

[0005] like Figure 2 to Figure 4 As shown, the existing large gear s-2 installed inside the shell s-1 of the snap-fit ​​and spliced ​​gearbox is directly press-fitted with the bearing outer ring s-3-2 on the large gear bearing s-3 to form a coaxial fixed connection Interference fit, the gear box installation shaft section d-1 on the axle d is directly press-fitted with the large gear bearing inner ring s-3-1 on the large gear bearing s-3 to form a coaxial fixed interference fit, the process The coaxial fixed connection form of the interference fit makes the gearbox installation shaft section d-1, the gearbox bearing s-3 and the large gear s-2 become an inseparable whole, and, due to the snap-fit ​​spliced ​​gearbox shell s- 1 has low structural strength, and it cannot be directly used as the focus point of the withdrawal baffle on the wheel shaft withdrawal press. Moreover, the bearing inner ring of the existing large gear bearing s-3 is too narrow, resulting in that even if the wheel shaft withdrawal pressure The on-board unloading baffle is refitted into a multi-jaw chuck and inserted into the gear box through the axle through hole on the axial side wall of the gear box. However, due to the lack of sufficient radial force points, it is still impossible to reliably clamp the large The inner ring s-3-1 of the gear bearing implements the radial withdrawal blocking force, so that the withdrawal of the axle cannot be directly implemented, and then when the subsequent maintenance of the axle d or the large gear s-2 must be buckled and spliced The gearbox casing s-1 is the first to release the original splicing and fastening state, and the axle d, the large gear s-2 and the large gear bearing s-3 that are coaxially fixed with it are removed from the frame as a whole. Then transfer to the axle unloading press to complete the unloading and replacement operation

The process of this method is cumbersome, time-consuming and labor-intensive, and it is impossible to remove and replace the axle d independently without removing the large gear s-2 from the snap-fit ​​spliced ​​gearbox casing s-1, and it is also impossible to maintain the buckle. Under the premise that the shell s-1 of the spliced ​​gearbox is in the fastened state, pull out the axle d separately and directly repair the large gear s-2 in the shell s-1 of the gearbox from the hole left after the axle d is removed. and lubrication maintenance

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