The shuttle shifting mechanism of wheel-tire tractor
Technical field
The utility model relates to a kind of shuttle shifting mechanism of wheel-tire tractor.
Background technology
For satisfying the supporting loader of wheel-tire tractor and other engineer operation, require trac. to have the function of fast forwarding and fast rewinding.But the gear reversing device of existing wheel-tire tractor, speed is slow, and gear is few, can not adapt to the requirement of outfitting tool.And the shuttle shifting mechanism of present disclosed wheel-tire tractor, though solved the problem of trac. fast forwarding and fast rewinding, but because this structure is that shuttle shifting mechanism is arranged in the special-purpose capable shelves housing of shuttle, and its transmission gear is more, complex structure not only, driving efficiency is not high, and has increased manufacturing cost.Owing to removed the reverse gear mechanism of former trac., the commonality of trac. decreases simultaneously.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of simple and reasonable for structure, highly versatile, and can improve the shuttle shifting mechanism of the wheel-tire tractor of driving efficiency.
The utility model is that the technical scheme that solves the problems of the technologies described above is: a kind of shuttle shifting mechanism of wheel-tire tractor, comprise the master clutch axle, driving gear, capable shelves intermediate gear of shuttle and tween drive shaft, driven shaft and dual gear, and change speed gear box input shaft, it is characterized in that: the master clutch axle that is installed on the clutch-bell cover is fixedly connected with driving gear, the driven shaft that is fixed on the clutch-bell cover is equipped with dual gear by bearing, be fixed on the capable shelves intermediate gear of shuttle that is equipped with on the tween drive shaft on the clutch-bell cover simultaneously with driving gear and dual gear constant-mesh, the driving gear component that can move axially and transmit torque is housed on the change speed gear box input shaft, and shift fork is stirred driving gear component and is meshed with driving gear and dual gear respectively.
The utility model has increased shuttle shifting mechanism after implementing technique scheme on former clutch-bell cover, need not to change or increase housing, and compact conformation keeps the repertoire of former change speed gear box, has stronger commonality.And the capable shelves of shuttle are finished the function of rewind down with the simplest transmission, not only oversimplify structure, and can improve driving efficiency, make trac. satisfy the needs of different outfitting tools.Simultaneously, shuttle shifting mechanism of the present utility model is removed tween drive shaft and the capable shelves intermediate gear of shuttle, adjusts the number of teeth of dual gear and ring gear, can realize the function of trac. crawler speed, improves the conformability of trac..
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is done further detailed the description.
Fig. 1 is the structural representation of the utility model shuttle shifting mechanism.
The specific embodiment
The shuttle shifting mechanism of wheel-tire tractor as shown in Figure 1 comprises master clutch axle 2, driving gear 3, capable shelves intermediate gear 11 of shuttle and tween drive shaft 12, driven shaft 9 and dual gear 10, change speed gear box input shaft 8 and can axially movable attaching parts.Master clutch axle 2 by bearing and bearing block support on clutch-bell cover 1, driving gear 3 splines are fixedly connected on the master clutch axle 2, the driven shaft 9 that is fixed on the clutch-bell cover 1 is equipped with dual gear 10 by bearing, this bearing is a needle bearing, one end of driven shaft 9 is connected on the clutch-bell cover 1 by locking plate, its other end is contained on the bearing cap shim 13 by locating bush, and bearing cap shim 13 is connected on the gearbox body.Tween drive shaft 12 is fixed on the clutch-bell cover 1, and the capable shelves intermediate gear 11 of shuttle with driving gear 3 and dual gear 10 constant-meshes is housed simultaneously, on the change speed gear box input shaft 8 driving gear component that can move axially and transmit torque is housed, move axially driving gear component by shift fork 5, mesh with driving gear 3 with dual gear 10 respectively, realize the normal gear of change speed gear box and the transmission of power of the capable shelves gear of shuttle.
As shown in Figure 1, driving gear component is by being fixedly connected on the engagement toothholder 6 on the change speed gear box input shaft 8 and being sleeved on the change speed gear box input shaft 8 and constituting with the ring gear 7 and the shift sleeve 4 of dual gear constant-mesh, change speed gear box input shaft 8 is bearing on the gearbox body by bearing, ring gear 7 is connected on the change speed gear box input shaft 8 by axle sleeve, engagement toothholder 6 splines are fixedly connected on the change speed gear box input shaft 8, shift sleeve 4 is contained on the engagement toothholder 6, stir shift sleeve 4 by shift fork 5 and move vertically, shift sleeve 4 is meshed with transferring power with driving gear 3 and ring gear 7 respectively.Driving gear component of the present utility model also can adopt an end to have the cliding gear that internal tooth and spline be slidingly connected on the change speed gear box input shaft 8 to constitute, realize the transmission of power of the capable shelves of shuttle by the slip ring gear equally.
As shown in Figure 1, during the utility model work, when shift fork 5 was stirred shift sleeve 4 left, the driving gear 3 of the power of driving engine on master clutch axle 2 given engagement toothholder 6 by shift sleeve 4 with transmission of power, pass to change speed gear box input shaft 8 again, realize the D Drive of trac..When shift fork 5 is stirred shift sleeve 4 to the right, the driving gear 3 of the power of driving engine on master clutch axle 2 passes to dual gear 10 and ring gear 7 by the capable shelves intermediate gear 11 of shuttle, give engagement toothholder 6 by shift sleeve 4 with transmission of power, pass to change speed gear box input shaft 8 again, at this moment master clutch axle 2 turns to switched in opposite with change speed gear box input shaft 8, and the gear number is identical with the D Drive figure place, realizes the function of trac. fast forwarding and fast rewinding.The utility model can suitably be adjusted the speed that falls back of trac. by adjusting the transmitting ratio of the capable shelves of shuttle.