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[CN 202011338700.3] Four-stage hydraulic-mechanical compound stepless transmission device


[CN 202011338700.3] Title of a four-stage hydraulic-mechanical composite stepless transmission device: Application number of a four-stage hydraulic-mechanical composite stepless transmission device: CN 202011338700.3 Applicant: Beijing Yuanhai Chuanzhi Technology Co., Ltd. Application Date: 2020-11-25 Patent Type: Application for the Invention The present invention discloses a four-stage hydraulic-mechanical composite stepless transmission device, involving the technical field of power transmission; including hydraulic speed control circuit, forward and backward mechanism, planetary dividing and merging mechanism, 4-speed planetary transmission mechanism, PTO mechanism and output mechanism. The planetary mechanism is used to divide the hydraulic power and mechanical power, and the four working sections are all hydraulic mechanical compound, which can obtain high transmission efficiency. Four hydraulic mechanical composite working sections can effectively reduce the displacement of the hydraulic pump motor, which is beneficial to reduce the cost and volume of hydraulic components. The reversing function is realized through the forward reversing mechanism, so the reversing also has 4 hydraulic mechanical working sections in the same direction as the forward direction. The four working sections of the invention are continuously variable, the speed of the hydraulic components is continuously changed, the clutch is switched without speed difference, the operation is simple, the transmission efficiency is high, and the power of the required hydraulic components is small.