| 摘要 |
A sower with a seed box, a frame, which bears said box, a coulter beam and several rows of sowing coulters, each of which is connected with the coulter beam by a four-link hinge. The base of the four-link hinge is fixed to the coulter beam and carries hinges one by one at ends thereof for control rods, which pass against stroking of the sower, and which are closed with the four-link hinge through the hinge and connected with the connecting beam which guides coulters. As a result, the four-link hinge (4) is under the resilient action which causes pressure on soil. Each hinge is made by the body of a bearing, the cross-section of which differs from the round one, and which has at least two cuts, arranged symmetrically, purposed for receiving elastic resilient elements, in parallel to the axles, and a brace arranged in the body which interacts with each of the resilient elastic elements by outer surfaces thereof. |
