Currently, most of the finger rehabilitation mechanisms achieve desired motion by scale synthesis or using multi-degree-of-freedom (DOF) mechanisms, which cannot simultaneously requirements posture and trajectory for rehabilitation. Aiming to solve this problem, study proposes a single-DOF noncircular pulley-five-bar mechanism, obtains pose movement extracts four important poses. The solution domain five-bar mechanism with poses was solved solution-region method, pulley used constrain two...

Abstract To obtain the best tool parameters for garlic root cutting to reduce force and improve efficiency, a linkage occlusion‐cutting mechanism was designed test. The physical mechanical properties of meat skin were measured calculated by using universal material testing machine. A plastic follow‐up model (MAT‐3) in LS‐DYNA library used as simulated model. three‐dimensional established imported into ANSYS/LS‐DYNA establish simulation numerical calculation analysis. optimized according...

Abstract A foot-driven rehabilitation mechanism is suitable for home healthcare due to its advantages of simplicity, effectiveness, small size, and low price. However, most the existing studies on lower limb movement only consider trajectory ankle joint ignore influence posture angle, which makes it difficult ensure rotation requirements achieve a better effect. Aiming at shortcomings current research, this article proposes new single degree-of-freedom (DOF) configuration that uses...

At present, the research objects of rigid-body guidance synthesis are mostly limited to pure linkages, and there is little on combined mechanisms gears or cams linkages. In order expand improve kinematic mapping theory, this paper proposes a method noncircular gear-five-bar mechanisms. A mechanism can be regarded as combination 2R (two revolute joints) open chain, 3R (three chain pair gears. Firstly, circle point curves center chains obtained by using mapping, they formed into double crank...

Root–stem separating is one of the most important processes in carrot harvesting, but it easy to cause damage due impact. In order reduce harvesting and provide basis for design separation mechanism, mechanism was studied by finite element method (FEM) pendulum experiment this study. Through simulation analysis experiment, found that critical impact force 45.2 N 43.1 N, respectively. Comparing two results, basically same, with an error 4.87%. conclusion, FEM reliable prediction, could be...

Abstract Existing research on synthesis methods for single degree-of-freedom (DOF) six-bar linkages mainly include four or five exact poses. However, an ideal trajectory cannot be synthesized using only poses, thus, it is necessary to introduce additional poses constrain the trajectory. If more are introduced, then linkage may have no solution. Therefore, constraints of approximate pose considered make conform desired This paper successfully introduces mixed into a linkage, based Z (Z...

Aiming at the problem that existing garlic-root-cutting equipment requires orientation and orderly conveying of garlic, a garlic method based on machine vision mechanical mechanisms was proposed device designed. To realize posture recognition, roots were used as detection objects, YOLOv5s objection model to establish feature model, trained. The developed recognition test completed. results show success rate is 98.67% average accuracy deviation angle 99.11%. When speed 95 mm⋅s−1 rotating 55...

When the load changes frequently during operation of a tree transplanting machine, power hydraulic pump fluctuates greatly, causing engine to work in high fuel consumption mode and suffer serious loss. To enable working device machine save energy when operating under variable load, matching between is required. In this article, control system designed based on modelled simulated by AMESim software. A test also built tested. The modelling, simulation testing results show that can stabilize...

In order to avoid the interference and lateral clearance between non-circular synchronous pulley belt, improve carrying capacity transmission accuracy of pulley, reduce noise in process transmission. this paper, conjugate engagement theorem generating method was applied calculation tooth profile pulley. The obtained by enveloping pitch curve with a rack cutter local quadrant proposed extract complete points based on distribution characteristics data envelope curve. auxiliary design program...