Structure Design and Bearing Capacity Analysis for Crawler Chassis of Rice Combine Harvester

Tang, Zhong; Ren, Hui; Li, Xiyao; Liu, Xin; Zhang, Biao

doi:10.1155/2020/7610767

Cited by 4 publications

(4 citation statements)

References 14 publications

(16 reference statements)

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“…At the same time, the GNSS position information, heading angle, speed of the walking shaft, and speed of the steering shaft were recorded. The theoretical turning radius, turning angular velocity, actual turning radius, actual turning angular velocity, and slip/slip rate were calculated according to Equations ( 1)- (12). The motion parameters and test results are shown in Tables 2 and 3.…”

Section: Test Datamentioning

confidence: 99%

“…In Europe and the United States, hydraulic drive chasses have been extensively employed in self-propelled combines, which can effectively circumvent the limitations of a mechanical drive [12][13][14][15]. There are three main driving forms: a single hydraulic pump with a single hydraulic motor and a gearbox, a single hydraulic pump with double hydraulic motors, and double hydraulic pumps with double hydraulic motors [16,17].…”

Section: Introductionmentioning

confidence: 99%

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Analysis and Experimental Investigation of Steering Kinematics of Driven Steering Crawler Harvester Chassis

Wang,

Jin,

Yang

et al. 2023

Agriculture

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In the context of automatic driving, the analysis of the steering motion characteristics is critical for enhancing the efficiency of crawler harvesters. To address issues such as the low transmission efficiency and the large steering radius encountered by traditional crawler harvesters featuring hydrostatic drives, a driven steering crawler harvester chassis was designed. This involved analysis of the chassis transmission system structure and its steering characteristics under several conditions, including differential steering, differential direction reversal, and unilateral braking steering. The steering parameters were determined based on real-time kinematic positioning–global navigation satellite system (RTK-GNSS) measurements, and they were compared with theoretical predictions based on the crawler harvester steering kinematics. The slip rates and modified models of the crawler chassis for various steering modes were then obtained. The results indicated that the increase in the ratio between the running input and steering input speeds led to larger track steering radii and smaller average rotational angular velocities. Remarkably, the slopes of the linear fits of the tracked chassis steering parameters varied significantly under differential direction reversal and differential steering modes. Compared with the actual results, the correlation coefficient of the tracked chassis steering parameters fitting model is close to 1. The steering parameter model was deemed suitable for actual operational requirements. The results provide a valuable reference for designing navigation and steering models of crawler harvesters operating on different road surfaces.

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Section: Test Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis and Experimental Investigation of Steering Kinematics of Driven Steering Crawler Harvester Chassis

Wang,

Jin,

Yang

et al. 2023

Agriculture

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“…The kind of bones used for bioinspiration depend on the mechanical properties of interest. Historically, the focus has been on the human femur [12,21,22]; but since then, inspiration has spread to, for example, the spine for its mix of strength, flexibility and stability [23][24][25], bird bones for their combination of lightness and strength [13,17,26,27], woodpecker skull and sheep velar bone for impact load applications [28,29], or the relative proportions and articulation of human or other mammalian bones for robotic design [30,31]. However, if bone answers to functional constraints, its structure also relies on developmental and structural (e.g.…”

Section: Introductionmentioning

confidence: 99%

How can research on modern and fossil bones help us build more resistant columns?

Houssaye,

Etienne,

Gallic

et al. 2024

Bioinspir. Biomim.

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Bone is an economical material. Indeed, as moving a heavy skeleton is energetically costly, the vertebrate skeleton is adapted to maximise resistance to the stresses imposed with a minimum amount of material, so that bone tissue is deposited where it is needed. Using bone as a source of inspiration should therefore reduce the manufacturing cost (both financial and ecological) and increase the strength (and lifespan) of bioinspired structures. This study proposes to investigate which adaptive features of the outer shape and inner structure of bone, related to compressive strength, could be used to build bioinspired support structures. To do so, we explain the choice of the bones to be analysed and present the results of the biomechanical analyses (FEA) carried out on virtual models built from the structures of the different bone models and of the mechanical tests carried out on 3D-printed versions of these models. The compressive strength of these direct bone bio-inspired columns was compared with each other, and with those of a conventional filled cylindrical column, and of a cylindrical column whose internal structure is bio-inspired from the radius of the white rhinoceros. The results of our comparative analyses highlight that the shape of long bones is less effective than a cylinder in resisting compression but underline the interest in designing bio-inspired cylindrical columns with heterogeneous structures inspired by the radius of the white rhinoceros and the tibia of the Asian elephant, and raise the interest in studying the fossil record using the radius of the giant rhinocerotoid Paraceratherium.

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“…Tang et al analyzed the structural characteristics and bearing capacity of crawler chassis based on the finite element model and designed a new type of crawler chassis joystick to improve the stability of the whole machine under high load. ese are all theoretical verification and analysis through finite element software [15]. Due to the influence of different boundary conditions and different calculation methods, the calculation results are also different from the actual ones.…”

Section: Introductionmentioning

confidence: 99%

Vibration Response of Combine Harvester Chassis Undergoing Multisource Excitation Force Distribution

Tang

Ren

et al. 2021

Mathematical Problems in Engineering

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When a combine harvester is harvesting in field under complicated conditions, vibration characteristics of the chassis frame under the excitation of multiple sources are complex and changeable. In order to analyze the vibration characteristics of the chassis frame of the combine harvester under complex working conditions and multisource excitation, this paper carried out three-dimensional modeling and static calculation of the chassis frame of the combine harvester. On this basis, the experimental modal analysis was carried out on the designed chassis frame, and finally, the vibration response under multiple excitations and complex working conditions was tested and analyzed in the field. Results showed that when the combine harvester was fully loaded, the maximum bending moment was at the load-bearing beam under the grain box. The maximum bending moment was 2298.08 N/m, and it was located at the cross section of the left end of the bearing beam at 1.61 m. When the components of the whole machine were working, the vibration of the chassis frame at the rear right was the most intense. The horizontal vibration of the threshing drum, the reciprocating motion generated by the vibrating screen, and the vertical vibration generated by the engine were the main vibration sources of the combine harvester in the three directions of X, Y, and Z. With the i\ncrease of engine speed, the excitation capacity of each working component connected to the engine on the whole machine increased. The results of this paper provide experimental basis for the research on the vibration characteristics of the chassis frame of the rice combine harvester under multisource excitation and also provide a reference for the further improvement of the chassis frame of the combine harvester.

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Structure Design and Bearing Capacity Analysis for Crawler Chassis of Rice Combine Harvester

Cited by 4 publications

References 14 publications

Analysis and Experimental Investigation of Steering Kinematics of Driven Steering Crawler Harvester Chassis

Analysis and Experimental Investigation of Steering Kinematics of Driven Steering Crawler Harvester Chassis

How can research on modern and fossil bones help us build more resistant columns?

Vibration Response of Combine Harvester Chassis Undergoing Multisource Excitation Force Distribution

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