Axle gear box shifting locking mechanism

Abstract

The invention discloses a vehicle axle gear box shift locking device used in track hydraulic driving vehicle axle gear box, comprising a dial device connected with the box, a mesh muffle, and an active gear axle with external spline. The dial device is connected with the mesh muffle with an inner spline, while the inner hole of the muffle is provided with an idle groove. One end of the active gear axle is connected with a spline axle with an external spline relative to the external spline of the active gear axle. The spline axle is arranged with a positioning element and relative positioning spring. The end of the mesh muffle is disposed with a suspending face or a suspending groove. When the internal spline of the muffle is meshed with the external splines on the active gear axle and the spline axle, the invention is in suspending state, the positioning element is engaged with the suspending face or suspending groove, and when the mesh muffle is only meshed with the external spline of the spline axle, the invention is in idle, and the positioning element is engaged with the idle groove of mesh muffle. The invention has reasonable structure and reliable lock.

Description

technical field [0001] The invention relates to a shift mechanism of an axle gearbox, in particular to a shift lock mechanism for a rail-type hydraulically driven axle gearbox. Background technique [0002] The rail-type hydraulic drive axle gearbox vehicle, in addition to self-propelled, also needs to meet the special needs of coupled operation. When self-propelled, the gear is put into gear through the shift control mechanism, and the hydraulic motor inputs power, which is transmitted to the driving gear to drive the driven gear to make the whole vehicle self-propelled. When connected with the train, the axle gearbox must be in the neutral position, that is, the hydraulic motor itself and the gear transmission system are disengaged to prevent the reverse movement of the wheel pair from driving the driven gear, and the driven gear to drive the driving gear, thereby damaging the hydraulic motor. . In order to prevent shifting of the shifting and neutral positions, there mu...

AI Technical Summary

Problems solved by technology

The structure of the shifting mechanism of the existing rail-type hydraulically driven axle gearbox is relatively complicated. For example, the auxiliary drive axle gearbox of the 08-32 type tamping vehicle imported from the Austrian Plasser company uses a toggle gear for shifting gears. The structure is relatively large and complex; another example is the shifting mechanism of the axle gearbox used on the rail grinding car of Jackson Corporation of the United States. The outer spline, the thin-walled meshing sleeve moves on the outer spline of the gear shaft, and the gear is engaged by the outer spline of the meshing sleeve and the inner spline of the large gear when self-propelled, and the gear is locked by using the inverted bevel teeth to prevent Out of gear; when the gear box is in the neutral state, the steel ball in the gear shaft is matched with the neutral groove in the thin-walled meshing sleeve to lock the thin-walled meshing sleeve so that the neutral position is locked

However, this structure still has the following disadvantages: because the thin-walled meshing sleeve has internal and external splines, it is difficult to manufacture; the gear shaft is an integral long shaft, and there are many matching parts on the shaft, which is difficult to process, complex in force, and huge in structure; thin-walled The external spline of the engaging sleeve is made of inverted bevel teeth to lock the shift position, which further increases the difficulty of manufacturing the thin-walled engaging sleeve, and the structure is unreasonable

In addition, there is also the disadvantage that the reliability of the gear position locking is not high, especially when the vehicle is running with a large vibration, it is very easy to move the gear position or the neutral position, that is, the phenomenon of gear disengagement, which will damage the thin-walled engagement sleeve or gear

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