Reverse Check Mechanism

CONSTRUCTION
The sleeve (1) is bolted to the transmission case. The shaft (2) is inserted in the sleeve At. On the smaller-diameter side of this shaft (2), the cam (3) is loosely mounted so that it can rotate, and the sleeve (1) holds the cam in place with its stepped part.

The spring (4), which is inserted in the shaft (2) presses the shaft to the left. Further, the spring (5) is placed in between the cam (3) and sleeve (1), which forces the cam (3) to the left and in the direction of rotation. Both springs are held down with the plate (6) that is attached to the sleeve (1) with the snap ring (7). The shaft (2) has a groove for reverse accent, in which the ball (9) and spring (8) are put through a hole drilled in the sleeve (1).





OPERATION
As shown in the previous figure, the sleeve (1) and shaft (2) have a notch, and the arm (11) is placed between the notches. The position of the arm (11) shown is the neutral position (hereafter referred to as (N) position). The point where the arm stops when moved to the left is the 1st and 2nd position. Opposite this, the point where the arm stops when moved to the right is the 5th and reverse position.

When 5th And Reverse Side Is Selected
The arm (11) pushes the shaft (2) and cam (3) simultaneously and moves to the 5th and reverse side, as shown in image-(1) Neutral position.

When Shift Is Made To 5th
As shown in image-(2) 5th position, the arm (11) moves to the 5th side pushing the shaft (2). When the arm (11) pulls out of the cam (3), the cam is returned to the original position by the spring (5).





When Shift Is Made From 5th To Reverse
As shown in image-(3) 5th->Neutral position, the arm (11) moves to the reverse side pushing the shaft (2) and runs against the cam (3) that has already returned. The cam (3) has, as shown in image [Arrow view "Z"], a stopper, which hits against the plate (6). Thus, the cam (it) cannot rotate further. Accordingly, the arm �3 comes to a stop at a point where it has turned the cam (3) to a certain degree (i.e., (N) position), and the cam (3) is pushed back to the (N) position by the shaft (2) (i.e., the spring (4).

When Shift Is Made To Reverse
From the position shown in image-(1) Neutral position, the arm (11) again moves to the 5th and reverse side. When the shift is made to reverse, the arm (11) moves to the reverse position while pushing the shaft (2) and cam (3) together.