The transplanting mechanism can be regarded as a two-bar manipulator. The positive and negative planetary gears in the eccentric gear box drive the positive and negative planting arms respectively. A seedling pushing mechanism composed of a swing cam mechanism and a sinusoidal mechanism in series is added to the...
Place the eccentric fixed shaft gear train in the gear box (planet carrier), and the center wheel 1 rotates in the same direction at twice the speed of the gear box, i.e ω 1 =2 ω H. A differential eccentric gear train with a degree of freedom of 2...
The unequal model solution of a pair of fixed shaft eccentric gears is extended to the fixed shaft gear train. Taking the three-stage eccentric gear transmission around the driving center wheel 1 shown in Fig. 1 as an example, the rotation angle relationship of the fixed shaft eccentric gear...
According to the above model, the actual rotation angle of passive eccentric gear φ The numerical solution steps of 2 are as follows: ① Set the module of eccentric gear as m and the number of teeth as Z, calculate the standard tooth profile of involute eccentric gear, and...
As the core component of the high-speed transplanter, the rotary transplanting mechanism first used the eccentric gear to drive the planting arm in the gear box to form the seedling claw track and posture required for seedling separation, seedling picking, seedling pushing and seedling transplanting. In the past, the...
Two identical standard involute circular gears are installed eccentrically at their respective axes O1 and O2 in the same phase, with an axis distance of a and an eccentricity of E = lo1c1 = lo2c2. In the initial position, the geometric centers C1 and C2 of the two gears...
Due to its simple design and convenient processing, eccentric circular gear is widely used in the transmission system of non-uniform motion. Compared with elliptical and non-circular gear transmission, the backlash of eccentric gear changes periodically in the transmission and will cause vibration and rotational speed runout under the condition...
According to the above tooth profile generation method, the tooth profile calculation software of eccentric modified gear is designed in Matlab environment. The program consists of interface display, undercut discrimination, gear parameter calculation, tooth profile envelope, intersection calculation, feature point sorting, data output and so on. Taking the gear...
At present, rice transplanters used in China, such as 2zt-935 rice transplanter produced by Yanji rice transplanter factory in Jilin Province and 2ztd-7428 rice transplanter developed by Zhejiang Province, adopt crank rocker mechanism. Due to the action of mechanism motion inertia force and the existence of seedling pushing device,...
The machining method of the eccentric modified gear generated by the modification method is the same as that of elliptical and non-circular gears. The machining essence is that the rack tool pitch line is tangent to the eccentric gear pitch curve and pure rolling. A modification amount MX must...