| 摘要 |
A crop harvesting header includes a cutter bar and a reel for controlling movement of the crop in the area over the cutter bar. The reel is rotatable about an axis generally parallel to the cutter bar and has a plurality of reel bats each having reel fingers projecting generally radially outwardly from the reel axis. The reel bats are pivotal each about a respective bat axis parallel to the reel axis so as to vary the angle of the fingers about the bat axis as the reel rotates. The reel co-operates with a cam carried on the header in generally stationary position so that each bat has a crank arm with a cam follower on the crank arm which follows the cam as the reel rotates and causes the required pivotal movement of the bat. The crank arm is arranged at an angle of the order of 135 degrees to the bat fingers so that the cam follower is angularly advanced in the cam relative to the bat axis. This provides significant mechanical advantages and allows use of longer crank arms thus reducing loadings and wear on the cam and followers.
|
