Abstract: Kelp seedling cultivation is operated manually in many coastal cities, which is highly labor-consuming. For the traditional gripping equipment for kelp seedling, the rate of seedling is low, and the service life of the grippers is short. In view of this, improvements have been made to the driving parts of the gripper for kelp seedling. In this paper, the selection basis of the design scheme of the gripper for kelp seedling gripping was firstly introduced; then the typical mechanical structure of the gripper for kelp seedling gripping was improved; finally, the optimal parameters of the loosening of the gripper for kelp seedling gripping are determined by experiment. The results showed that the connecting rod and CAM mechanism have been reasonably merged into the coordinated action of the gripper for kelp seedling gripping, meanwhile the three movements "gripping-loosening,-drawing close to form a hole" was completed, thus the kelp rope for inserting seedling "clamping-loosening,- inserting seedlings" automation was achieved; By experiment, it is determined that the length of the gripping length is 60mm, the torque required for changing the angle of 5o ~ 10o is small, and the hole is easy to be formed. The research shows that the gripping motion can be completed in a short time, which can provide a reference for the development and application of the seedling gripping device of Marine plants, thus having a good prospect for development.

Key words: kelp seedling cultivation, gripping forceps, gripper, mechanical structure, structure design

摘要： 很多沿海城市海带栽培采用人工操作，工作强度很大，传统海带夹苗设备进苗率低，夹苗绳的使用寿命较短，鉴于此，对海带夹苗机的传动部分做了改进。首先介绍了海带夹苗机设计方案选择依据，其次对海带夹苗机典型机械结构进行改进，最后通过实验对比确定了海带夹苗机破扣的最佳参数。结果表明：连杆、凸轮机构合理融合在海带夹苗钳的协调动作中，同时完成“夹紧—扭松—靠拢成孔”3个动作，实现了海带苗绳“夹紧—破扣—插苗”的自动化；通过实验确定了海带苗绳装夹长度为60 mm，扭转5o~10o时夹苗所需的扭力小，成孔容易。结论：改进后的海带夹苗钳短时间内即可完成海带苗装夹动作，可以为海产植物类夹苗装置的开发和应用提供参考，有较好的开发前景。

关键词: 海带养殖, 夹苗钳, 夹苗机, 机械结构, 结构设计