Design And Experiment Of Vibration-Comb Brush Type Camellia Oleifera Fruit Picking Device

This paper mainly aims at the problems of low efficiency of mechanized picking of Camellia oleifera fruit,great damage to buds,branches and leaves,combined with the current situation and development characteristics of mechanized picking of Camellia oleifera fruits at home and abroad,and studies and analyzes their picking forms and mechanism of action.Mechanical properties such as flower buds,a vibration-comb brush type Camellia oleifera fruit picking device was designed.The three-dimensional model of the Camellia oleifera fruit picking device was established in SOLIDWORKS software,and the working principle of the picking device was expounded,and the operation process of the picking device was theoretically analyzed.Through the coordinated operation of the vibration mechanism and the combing mechanism,the picking efficiency of the camellia fruit is improved,and the damage to the buds and branches and leaves is reduced at the same time.The rigid-flexible coupling simulation analysis of the picking device and the fruiting branches was carried out with the help of ADAMS software,and the analysis results provided a reference for the design,creation and field experiment of the picking device.Through the trial production of the prototype,the field performance picking test was carried out.It can be seen that different picking operation parameters will directly affect the picking effect.Through the orthogonal test,the optimal combination of operating parameters was obtained..The research results can provide a certain reference for the follow-up mechanized picking of Camellia oleifera fruit.The specific points are as follows:1)The biological environmental and mechanical properties of camellia oleifera were studied.Through investigation and measurement of camellia tree characteristics: the height of camellia tree is 2 ～ 3m,the diameter of the canopy is about 2m,the distance of the camellia tree is about 3m,the camellia fruit is mainly concentrated in the surface layer of the tree crown 0.3m,the fruit length of hanging fruit branches is about 0.4m,the diameter of hanging fruit branches is about 0.35 m.The maximum and minimum tensile strength of Changlin no.4are 13.09 N and 8.38 N respectively.The maximum and minimum tensile strength of Changlin 40 are 21.79 N and 10.02 N respectively.The maximum and minimum tensile strength of Huaxin are 13.72 N and 6.86 N respectively.The maximum and minimum tensile resistance of Asus are 12.74 N and 4.90 N respectively.The binding ability of camellia oleifera fruit varied greatly in different varieties and different periods.2)By exploring the spatial distribution of Camellia oleifera fruit and the mechanical properties of the fruit,a vibration-comb brush-type Camellia oleifera fruit picking device was designed.Using SOLIDWORKS software,the three-dimensional model of the picking device was established,the working principle of the device was analyzed,the operation process of the vibration mechanism and the brushing mechanism was theoretically analyzed,and the interaction of the operating area on the picking of camellia fruit was analyzed.3)The device-resulting branch rigid-flexible coupling model is established with the help of ADAMS software.By analyzing the speed,acceleration,collision force,etc.,when the device acts on the fruiting branches during the picking process,the influence of the vibrating plate and the tooth comb plate on the fruiting branches under different operating parameters during the operation is analyzed,and then the impact on the camellia fruit picking.4)Carry out field performance test through the prototype produced by trial.The results show that the picking performance is better under the combination of operating parameters that the vibration frequency of the vibrating plate is 5.52 Hz,the amplitude is 69.69 mm,and the distance between the teeth of the comb plate is 45 mm.The flower rate is 8.39%.