shifting assembly for a change speed gearbox includes axially displaceable shift rods and pivotably displaceable shift rockers for actuating respective gear wheel clutches. our company is professional hydraulic motor,piston motor,hydraulic winch,gearbox,pg电子下载-pg电子游戏supplier providing customers from domestic zhongyiyepk and overseas the best and reliable hydraulic products.welcome to visit our website.locking elements in the form of linear pins and pivotal members are abuttingly engaged with the respective shifting mechanisms so as to assure locking of all other shift rockers and shift rods when one of the shift rockers and shift rods is moved to a clutch actuating position.
in a shift device of this general type described in german patent document de 41 18 931 a1, the pivotably movable locking element is constructed in the form of a two-armed locking lever which is pivotably mounted on the gearbox casing at a central point located between its two lever ends. on its one lever arm it has a recess for engagement of the linearly movable locking element and interacts with its other lever end by means of a locking cam with a corresponding mating cam contour of the shift rocker.
in such a way that the locking cam is held, in the neutral position of the shift rocker corresponding to the disengaged state of the gear wheel clutch, in engagement with the mating cam contour on the shift rocker by means of a restoring spring which acts on the locking lever--and, on the other hand, when the shift rocker is activated into a gear speed position corresponding to the engaged state of the other gear wheel clutch, the locking cam is pivoted by the mating cam contour into its other end position in which it is no longer the recess of the locking lever but rather its locking face which is congruent with the geometric axis for the movements of the linearly movable locking element. when an additional shift rocker is used in this known shift device, a second two-armed locking lever which interacts with the second shift rocker and an intermediate locking linkage which interacts with both two-armed locking levers and also with the first shift rocker must be provided, so that this known shift device requires a complicated design.
in shift devices constructed according to the invention, the number of the totality of gear wheel clutches for the gearbox shafts does not preclude utilization of the novel locking assembly arrangement.
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