Streetcar gear transmission device

Abstract

The invention discloses a streetcar gear transmission device for a low-floor streetcar. The streetcar gear transmission device comprises an upper box body, a lower box body, a driving bearing seat assembly and a driven bearing seat assembly, wherein the upper box body is also provided with an oil inlet window, an oil collecting cavity, an oil discharging oil passage and a small oil window, the top of the upper box body is provided with a cover plate, the cover plate covers above a top opening of the oil collecting cavity, the driving gear seat assembly also comprises an oil baffle ring, a sealing ring, a small sealing cover, a first separation sleeve and a second separation sleeve, the driven bearing assembly also comprises a large sealing cover, a first oil seal, a second oil seal and a positioning sleeve, a driven gear is in interference connection onto a driven bearing seat, one end of the driven bearing seat is provided with a driving end surface fluted disc, a matched hole and a first positioning pin hole, the outer periphery of the driven bearing seat is provided with a first step and a second step, the other end of the driven bearing seat is provided with an operation hole and a first screw bolt hole, the matching hole and the operation hole are communicated through a center hole, and an upper end hanging element and a lower end hanging element are arranged on the upper box body. The streetcar gear transmission device has the advantages that the structure is simple and compact, the lubrication sealing effect is good, and the oil level can be conveniently observed.

Description

technical field [0001] The invention relates to a vehicle transmission system, especially a gear transmission device in a low-floor tram transmission system. Background technique [0002] Low-floor tram is a new urban rail transit vehicle between light rail and subway, which has unique advantages, and the gear transmission system is the core part of low-floor tram. The currently published Chinese patent CN 101979266 A introduces a 100% low-floor light rail car independent wheel power bogie technology. The bogie of this light rail car has no axles and uses independent wheel sets. The forward direction of the wheel is vertical, and the existing patent for this kind of light rail vehicle gear transmission is CN 203717849 U: a one-stage spiral bevel gear transmission, the output end of the gear transmission is connected to the wheel coupling through a coupling, The driving end and the driven end are driven by a spiral bevel gear with an offset distance, which realizes the trans...

AI Technical Summary

Problems solved by technology

The currently published Chinese patent CN 101979266 A introduces a 100% low-floor light rail car independent wheel power bogie technology. The bogie of this light rail car has no axles and uses independent wheel sets. The forward direction of the wheel is vertical, and the existing patent for this kind of light rail vehicle gear transmission is CN 203717849 U: a one-stage spiral bevel gear transmission, the output end of the gear transmission is connected to the wheel coupling through a coupling, The driving end and the driven end are driven by a spiral bevel gear with an offset distance, which realizes the transmission of motion and torque in the vertical direction, and also reduces the center of gravity of the entire box, but the gear transmission has the following disadvantages: (1) output The large bearing housing at the end and the wheel are transitionally connected to the wheel through an intermediate coupling, and the outer end of the coupling is connected to the brake disc, which reduces the transmission efficiency, and an oil collecting plate is installed inside the box, and the oil collecting plate and It cannot achieve the expected oil collection effect. On the contrary, if the connection is not firm, it may fall into the box, causing safety incidents, thus reducing work safety; (2) There is no adjusting gasket between the pinion shaft assembly and the box, and the output There is no adjusting gasket between the large end cover and the box body. If the size of the parts is not processed in place, it may not be possible to obtain the ideal gear pair side clearance and contact area, and it may not be possible to obtain a reasonable axial clearance of the bearing, resulting in When the gear pair is working, the noise is too large or the temperature is too high, which reduces the working life of the gears and bearings; (3) the hanging device is much higher than the box, and the structure of the entire gear transmission is not compact enough, and there is only one hanging device on the box to fix it , the stability of the box after installation is not good; (4) The change of the oil inside the small bearing seat cannot be observed

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