Dimensional Synthesis and Kinematic Analysis of Mold Clamping Mechanism with Double Toggle Effects at Clamped Position

2020 ◽  
Vol 900 ◽  
pp. 27-34
Author(s):  
Long Chang Hsieh ◽  
Tzu Hsia Chen ◽  
Po Cheng Lai
Keyword(s):  
Kinematic Analysis ◽  
Dimensional Synthesis ◽  
Kinematic Characteristics ◽  
Open Position ◽  
Better Than

The mold clamping mechanism is an important mechanism of injection machine, and the mold clamping mechanism with good kinematic characteristics is the goal pursued when designing injection machine. Traditionally, the mold clamping mechanism must have at least one toggle effect at clamped position; when the mold is at open position, the mold clamping mechanism does not need to have toggle effect. In this paper, 2 mechanisms of existing patents are used to illustrate the process of the dimensional synthesis and kinematic analysis of mold clamping mechanism with double toggle effects at clamped position. The kinematic characteristics of 2nd mechanism is better than 1st mechanism.

ON THE HYBRID-DRIVEN LINKAGE MECHANISM WITH ONE INPUT CYCLE CORRESPONDING TO TWO OUTPUT CYCLES

2015 ◽  
Vol 39 (3) ◽  
pp. 637-646
Author(s):  
Ren-Chung Soong
Keyword(s):  
Kinematic Analysis ◽  
Angular Speed ◽  
Motion Trajectory ◽  
Dimensional Synthesis ◽  
Reciprocating Motion ◽  
Linkage Mechanism ◽  
Output Link ◽  
Input And Output ◽  
Single Input ◽  
Selection Of

A hybrid-driven five-bar linkage mechanism with one input cycle corresponding to two output cycles is presented. The proposed linkage mechanism is driven by a constant-speed motor and a linear motor, respectively. The output link can generate two same required output cycles during a single input cycle, while the rotational input link rotates with a constant angular speed, and the linear input link follows a reciprocating motion along a specified linear guide fixed on the rotational input link. The configuration, displacement relationship between the input and output links, and conditions of mobility of this proposed mechanism were studied, and a kinematic analysis was performed. The selection of the instantaneous motion trajectory of the linear input link and an optimal dimensional synthesis are also described. An example is provided to verify the feasibility and effectiveness of this methodology.

scholarly journals Comparative Kinematic Analysis of Hurdle Clearance Technique in Dogs: A Preliminary Report

Animals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2405
Author(s):  
Francisco Miró ◽  
Patricia López ◽  
Jose Manuel Vilar ◽  
Alfonso M. Galisteo ◽  
Joaquín Vivo ◽  
...  
Keyword(s):  
Kinematic Analysis ◽  
Preliminary Report ◽  
Preliminary Evidence ◽  
Jump Height ◽  
Skill Levels ◽  
Kinematic Characteristics ◽  
Maximal Height ◽  
The Difference ◽  
Clearance Technique

Although the jumping characteristics of agility dogs have been examined in recent years, there is currently a lack of data related to the suspension phase. The purpose of the present study was to investigate the biomechanics of the suspension phase of the agility jump and to analyze the kinematic differences in dogs with different jumping abilities. Two groups of dogs of the same height category (large dogs) competing at different skill levels and assessed as excellent jumpers (n = 4) and less-skilled jumpers (n = 3), respectively, were analyzed and statistically compared. Excellent jumpers showed longer and faster jumps with flatter jump trajectories than less-skilled jumpers. In less-skilled jumpers, the distance in front of the hurdle was notably greater than the distance behind it, while the difference between these two distances was less in excellent jumpers. Length and duration of the jump, maximal height of the jumping trajectory, take-off and landing distances to the hurdle, time of occurrence of maximal jump height, and time of change in back orientation essentially defines the suspension phase of the agility jump. This study presents preliminary evidence that the kinematic characteristics of hurdle clearance are different in excellent jumper dogs and in less-skilled jumper dogs.

The Kinematic Analysis of Heart-Shaped Gear Continuously Variable Transmission

2010 ◽  
Vol 37-38 ◽  
pp. 1489-1492
Author(s):  
Chuan Qiong Sun ◽  
Guo Xing Sun ◽  
Ai Hua Ren ◽  
Yong De Liu
Keyword(s):  
Kinematic Analysis ◽  
Continuously Variable Transmission ◽  
Kinematic Characteristics ◽  
Variable Transmission ◽  
Working Principle

Based on the research of non-circular gear Continuously Variable Transmission (CVT), firstly the working principle of the heart-shaped gear is introduced, and then the kinematic characteristics are analyzed, lastly the feature of the heart-shaped gear CVT is obtained.

Kinematic Analysis and Dimensional Synthesis of a Meso-Gripper

2016 ◽  
Author(s):  
Guochao Bai ◽  
Xianwen Kong ◽  
James Millar Ritchie
Keyword(s):  
3D Printing ◽  
Kinematic Analysis ◽  
Size Range ◽  
Dimensional Synthesis ◽  
Mesoscopic Scale ◽  
Robotic Hands ◽  
Printing Technology ◽  
Digital Multimedia ◽  
3D Printing Technology ◽  
Differential Mechanism

In recent years, applications in industrial assemblies within a size range from 0.5mm to 100mm are increasing due to the large demands for digital multimedia products. Research on grippers or robotic hands within the mesoscopic scale of this range has not been well explored. This paper proposes a mesoscopic scale gripper (meso-gripper) which has two modes: passive adjusting mode and an angled precision gripping mode. The gripper adjusts its shape automatically according to the appropriate mode. This form of gripping and the associated mechanism are novel in their implementation and operation. The meso-gripper which has metamorphic characteristics is generated by integrating a remote center of motion (RCM) mechanism with a cross four-bar (CFB) linkage. The dimensional synthesis of the gripper is outlined for a specified task-based gripping followed by the analysis of the synthesizing mechanism. A differential mechanism is adopted to increase the flexibility of the meso-gripper. Prototype is fabricated and tested using 3D printing technology to verify the feasibility of the design.

Synthesis and Analysis of 4-DOF Parallel Manipulators of Computer Aided Geometry Approach

2014 ◽  
Vol 912-914 ◽  
pp. 1010-1016
Author(s):  
Yan Hua Zhang ◽  
Xiu Ju Du ◽  
Bai Yong Zhang
Keyword(s):  
Computer Simulation ◽  
Kinematic Analysis ◽  
Geometric Approach ◽  
Parallel Manipulators ◽  
Geometric Constraints ◽  
Type Synthesis ◽  
Moving Platforms ◽  
Kinematic Characteristics ◽  
Computer Aided

A novel computer aided geometry approach for type synthesis and analysis of new spatial 4-DOF parallel manipulators is put forward, and create the computer simulation mechanisms of parallel manipulators using the geometric constraints and dimension driving techniques in CAD software, Based on the computer simulation mechanisms of parallel manipulators, several new spatial 4-DOF parallel manipulators are synthesized, the kinematic characteristics of the moving platforms are analyzed by computer simulation. The results of computer simulation prove that the computer aided geometric approach for solving type synthesis and kinematic analysis is not only fairly quick and straightforward, but also has the advantages of accuracy.

Kinematic Analysis of Spatial Mechanisms by Means of Constant-Distance Equations

1972 ◽  
Vol 1 (3) ◽  
pp. 129-134 ◽  
Author(s):  
M.O.M. Osman ◽  
D. Segev
Keyword(s):  
Computer Analysis ◽  
Digital Computer ◽  
Kinematic Analysis ◽  
Dimensional Synthesis ◽  
Mobility Analysis ◽  
Rigid Link ◽  
Spatial Mechanisms ◽  
Constant Distance ◽  
Complex Mechanisms

The concept and use of constant-distance equations for the kinematic analysis of linkages are presented. The procedure is based on the fact that a constant-distance equation is formulated, wherever the distance between two pair-centers of a rigid link remains constant throughout its motion. This results in a much simpler kinematic analysis of the linkage. To illustrate the procedure and the feasibility of the method, the cases of spatial RRRR– and RGCR-mechanisms with coupler points are considered. The technique is well suited to digital computer analysis of complex mechanisms; extensions to dimensional synthesis as well as to dynamic and mobility analysis are possible.

Kinematic Analysis and Dimensional Synthesis of a New 2R1T Parallel Kinematic Machine

2018 ◽  
Author(s):  
Lingmin Xu ◽  
Xubiao Zhu ◽  
Wei Ye ◽  
Qinchuan Li ◽  
Qiaohong Chen
Keyword(s):  
Kinematic Analysis ◽  
Inverse Kinematics ◽  
Parallel Kinematic Machine ◽  
Dimensional Synthesis ◽  
Transmission Index ◽  
Fixed Base ◽  
Prismatic Joints ◽  
Force Transmissibility ◽  
Parallel Kinematic ◽  
Local Transmission

This paper deals with the kinematic analysis and dimensional synthesis of a new 2R1T (R: rotation, T: translation) parallel kinematic machine (PKM). This is a 2PRU-UPR (P, R, U standing for prismatic, revolute and universal joint, respectively) PKM that is actuated by three actuated prismatic joints, two of which are mounted on the fixed base to reduce the movable mass. Firstly, the mobility and inverse kinematics of the 2PRU-UPR PKM are proposed. And then the motion/force transmissibility is evaluated by the local transmission index and good transmission workspace. Moreover, the singular configurations are obtained according to the motion/force transmissibility. Dimensional synthesis is carried out based on the GTW, and the optimized architectural parameters with good GTW are obtained. Finally, a prototype based on the optimized parameters has been developed, which has great potential in machining workpieces with curved surfaces.

Numerical analysis for force distribution along the swing jaw plate of a single toggle jaw crusher

2017 ◽  
Vol 14 (3) ◽  
pp. 255-260 ◽  
Author(s):  
B.B.V.L. Deepak ◽  
M.V.A. Raju Bahubalendruni
Keyword(s):  
Numerical Analysis ◽  
Motion Analysis ◽  
Kinematic Analysis ◽  
Design Methodology ◽  
Research Work ◽  
Movement Analysis ◽  
Force Distribution ◽  
Content Type ◽  
Jaw Crusher ◽  
Kinematic Characteristics

Purpose The purpose of this research work is helpful for recognizing the crushing characteristics of a single toggle jaw crusher during its operation. It is useful for designing a new prototype of this kind of machine with optimal dimensions of the jaw crusher frame and the crushing chamber. Design/methodology/approach The efficiency of the jaw crusher primarily depends on the kinematic characteristics of the swing jaw plate during the crushing process. The present research work deals with the kinematic analysis of the swing jaw plate of a single toggle jaw crusher. Findings During the analysis, the system is considered as a four-bar crank rocker mechanism. The force distribution is analyzed based on the results obtained from the motion analysis of the swing jaw plate. Originality/value The movement of the swing jaw plate is explained in detail while the machine is in operation. Kinematic analysis of the liner has been performed by considering some points along the swing jaw plate. The results obtained from the movement analysis of the swing jaw plate force distribution along the liner are analyzed. From this analysis, the chamber geometry can be optimized according to the requirement for the crushing motion of different zones in the crushing chamber.

Kinematics and Control of the TowPlow: A Steerable Articulated Vehicle System

2014 ◽  
Author(s):  
Jaeyoung Kang ◽  
Steven A. Velinsky
Keyword(s):  
Kinematic Analysis ◽  
Radius Of Curvature ◽  
Steering Angle ◽  
Vehicle System ◽  
Kinematic Characteristics ◽  
Articulated Vehicle ◽  
Constant Radius ◽  
Simulation Results ◽  
And Control

The TowPlow is a novel type of snowplow that consists of a conventional snowplow vehicle and a steerable, plow-mounted trailer. The trailer is equipped with hydraulic-powered steerable axles so that it can be steered up to 30 degrees with respect to the tractor. The combination of the front plow of the towing snowplow and the trailer-equipped plow is able to clear a path up to approximately 24-ft wide, which is the width of two typical traffic lanes. In this paper, the kinematic characteristics of the TowPlow are derived using instantaneous centers of velocity. Based on the derived equations, the relation between the radius of curvature and the trailer wheel steering angle that allows the tractor-trailer to maintain its initial articulation angle is defined. Also, simulations of constant radius turning are performed with and without the trailer’s corrective steering, and the results are compared. Even though the kinematic analysis does not take forces and inertia into account, it is clearly demonstrated in the simulation results that appropriate steering of the trailer wheel is necessary to maintain the articulation angle of the TowPlow and to prevent the device from intruding into adjacent lanes.

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