Analysis of novel geared linkage mechanisms

Soong, Ren-Chung

doi:10.1299/jamdsm.2014jamdsm0030

Cited by 8 publications

(5 citation statements)

References 21 publications

(25 reference statements)

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“…Synthesizing a geared mechanism that follows a particular path was also demonstrated by Zhang, who showed how the properties of geared fivebar mechanisms could be improved using an atlas, or compilation, of known coupler curves [14]. Soong discussed methods of analyzing geared linkage mechanisms [15]. Similarly, Ting provides a methodology similar to the Grashof criteria for four-bar linkages, which allows a designer to anticipate the 'rotability' of a geared five-bar mechanism given the dimensions of the mechanism and some phase angle conditions [16].…”

Section: Literature Reviewmentioning

confidence: 95%

“…curves [14]. Soong discussed methods of analyzing geared linkage mechanisms [15]. Similarly, Ting provides a methodology similar to the Grashof criteria for four-bar linkages, which allows a designer to anticipate the 'rotability' of a geared five-bar mechanism given the dimensions of the mechanism and some phase angle conditions [16].…”

Section: Literature Reviewmentioning

confidence: 99%

“…Figure15. The solution mechanism is shown moving from the first (solid line) to the fourth (dashed line) prescribed position.…”

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confidence: 99%

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Synthesis of Geared Planar Linkage Mechanisms through the Segmentation of Multiloop Mechanisms into Discrete Chains

Mather,

Erdman

2024

Machines

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Gears are foundational tools used to transmit or modify mechanical energy or motion. Implementing gears into planar linkage mechanisms is less common but can be a similarly valuable technique that takes advantage of the high efficiency of gears while producing complex and precise motions. While recent numerical methods for designing these geared planar linkage mechanisms (GPLMs) have proliferated in the literature, analytical approaches have their merits and have received less attention. Here, an analytical alternative is presented as a modification of the complex-number loop-based synthesis method for designing multiloop mechanisms. Some of the base topologies for geared dyad, triad, and quadriad chains are presented, along with a numerical example demonstrating the solution procedure’s effectiveness.

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Section: Literature Reviewmentioning

confidence: 95%

Section: Literature Reviewmentioning

confidence: 99%

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Synthesis of Geared Planar Linkage Mechanisms through the Segmentation of Multiloop Mechanisms into Discrete Chains

Mather,

Erdman

2024

Machines

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“…Forward design [10,20] is to obtain the movement trajectory before seed drop through the structural dimensions of the already determined mechanism, which is easy to solve, but it requires design experience and insufficient optimization, and the work accuracy is low, which makes it difficult to ensure the success rate of seeding. Reverse design [11] is based on the ideal trajectory has been determined, through a reasonable allocation of the transmission ratio, solve the non-circular gear structure size, reverse design is easy to obtain the ideal trajectory, the work accuracy is better, but the curvature of the gear pitch curve obtained by the solution of the degree of curvature change is large, the gear mesh transmission performance deteriorates, resulting in difficult to control the seeding movement speed and stability.…”

Section: Introductionmentioning

confidence: 99%

Inverse design and accurate optimization of layered structured seeding mechanism for sugarcane planters

Liu,

Chen,

et al. 2023

International Journal of Agricultural and Biological Engineering

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Existing sugarcane planters are difficult to have ideal seeding trajectory and motion attitude at the same time, and the speed is difficult to meet the requirements at the critical stage, resulting in poor stability, which ultimately makes it impossible to ensure that the sugarcane seeding is carried out in accordance with the agronomic requirements to ensure that the cane buds are oriented toward the wall of the seeding trench. Aiming at the second-order non-circular planetary gear system pendulum seeding mechanism of the planter, the paper innovatively adopts the combination of inverse design and multi-objective layered accurate optimization to solve the problems of attitude, speed and trajectory that do not meet the requirements of fixed-attitude seeding that still exists in the process of sugarcane seeding. The second-order non-circular planetary gear system is simplified into a three-rod two-degree-of-freedom mechanism, and the radius of the pitch curve of each non-circular gear is solved inversely by actively preplanning the static trajectory of the cane seed motion and analyzing the law of motion of the rod assembly. Determining the range of cane seed attitude angles in different motion phases as the first layer optimization objective, and fine-tuning the position of static trajectory key type value points to achieve the first layer optimization. Based on the non-circular gear pitch curve obtained from optimization, the interpolation points are marked on each non-circular gear pitch curve of the second-order non-circular planetary gear system, and based on the parameter optimization method of humancomputer interaction, the radius values corresponding to the interpolation points of the non-circular gear pitch curve are finetuned to optimize the pitch curves, so as to satisfy the speed requirements of the cane species in each stage, and at the same time to make the convexity of non-circular gears in line with the principle of gear mesh, so as to complete the second layer of accurate optimization. The results of simulation verification show that the motion trajectory attitude of the virtual prototype is basically consistent with the theoretical model, which verifies the feasibility of the mechanism design. This study provides a new optimized design method for the cane seeding mechanism of sugarcane planters to achieve directional seeding.

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“…A 12-link adjustable mechanism of a conveying machine is proposed for the purpose of accomplishing the crank motion uniform in one direction and simplifying controller of its driving system (Sakamoto et al, 1987). Two types of novel geared linkage mechanism is presented where the output link can generate two required motion cycles while the input link complete a single motion cycle (Soong, 2014). Those mechanisms can be used in any machine with translational output and can double the flexibility.…”

Section: Introductionmentioning

confidence: 99%

On the synthesis of a geared adjustable stroke mechanism

Parlaktaş

2018

JAMDSM

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This study presents novel analysis and synthesis methods for a certain type of geared adjustable stroke mechanism. The mechanism has significance in mechanical design, as it has been used in practice. However, to the best of our knowledge, any theory on its analysis or synthesis is not available in the literature. The problem is divided into four parts and each part is generalized. Novel synthesis procedures for possible largest stroke are developed. Design charts are prepared for maximum stroke configuration. Stroke variation is an important concern in mechanism design. By adopting the introduced method, the output stroke can simply be adjusted even during the operation. The output stroke of the mechanism can be decreased more than 50% with proper transmission, velocity and acceleration characteristics. Use of non-integer gear ratio is also investigated. That property leads a variable stroke mechanism inherently. The relationship between the gear ratio and the number of cycles needed to return to the initial stroke value is determined. As a result, all possible design methods are investigated and generalized for this mechanism. Therefore, significant flexibility is introduced for adapting this mechanism to various practical applications.

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Analysis of novel geared linkage mechanisms

Cited by 8 publications

References 21 publications

Synthesis of Geared Planar Linkage Mechanisms through the Segmentation of Multiloop Mechanisms into Discrete Chains

Synthesis of Geared Planar Linkage Mechanisms through the Segmentation of Multiloop Mechanisms into Discrete Chains

Inverse design and accurate optimization of layered structured seeding mechanism for sugarcane planters

On the synthesis of a geared adjustable stroke mechanism

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