A Robot Gripper with Differential and Hoecken Linkages for Straight Parallel Pinch and Self-Adaptive Grasp

被引:1
|
作者
Liu, Yankai [1 ]
Zhang, Wenzeng [2 ]
机构
[1] Beihang Univ, Sch Mech Engn & Automat BUAA, Beijing 100191, Peoples R China
[2] Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China
来源
APPLIED SCIENCES-BASEL | 2023年 / 13卷 / 12期
关键词
robot hand; underactuated finger; straight parallel pinch; self-adaptive grasping; Hoecken linkage;
D O I
10.3390/app13127042
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Parallel pinch is an important grasp method. The end phalanx of the traditional parallel pinch and self-adaptive gripper moves in an arc trajectory, which requires the auxiliary lifting motion of the industrial manipulator, which is inconvenient to use. To solve this problem, a novel robot finger is designed and implemented-Hoecken's finger. In this finger, the Hoecken linkage mechanism is used to realize the straight-line trajectory of the end joint, the differential mechanism set on the surface of the phalanxes is used to realize the shape self-adaptation of the first and second phalanxes, and the parallel four-bar linkage in series is used to realize the attitude keeping, thus comprehensively realizing the underactuated gripper driven by a single motor. After analyzing the grasp force and grasp motion of Hoecken's fingers, the optimized parameters are obtained, and the Hoecken's gripper is developed. The experimental results show that the gripper can realize the self-adaptive grasp function of straight parallel pinch, the grasp is stable, and the grasp range is large. It can be applied to more scenes that need to grasp objects.
引用
收藏
页数:16
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