A rotary cultivator with an automatic following clutch device

Abstract

The invention provides a rotary cultivator with an automatic following clutch device. The rotary cultivator comprises a power-driven belt clutch wheel which comprises a belt wheel, an output shaft and a disengaging pawl; the output shaft drives a rotary cultivation device; the rotary cultivation device comprises a transmission case with one end movably hinged to a rack and a rotary cultivation cutter is installed on the other end of the transmission case; a first hydraulic oil cylinder is connected with the case body of the transmission case and a second hydraulic oil cylinder is connected with the disengaging pawl of the belt clutch wheel; oil paths of the first hydraulic oil cylinder and the second hydraulic oil cylinder communicate with each other and are driven by a hydraulic pump; a controller controls the hydraulic pump to convey oil to the oil paths or unload oil from the oil paths; the disengaging pawl is provided with a resetting spring; spring force makes the disengaging pawl return to the resetting position and the minimum resetting moment applied to the disengaging pawl by the resetting spring is greater than or equal to the thrust moment applied to the disengaging pawl by the second hydraulic oil cylinder when the rotary cultivation cutter just rises to the highest position. The problems that the torque of a rotary cultivation cutter in a shallow ploughing state is insufficient and a rotary cultivation cutter is damaged because of overload when being lowered into mud.

Description

technical field [0001] The invention relates to an agricultural cultivating implement with a driven rotary working part, in particular to a rotary cultivator with an automatic following clutch device. Background technique [0002] For the known rotary cultivator, automatically associating the opening and closing action of the clutch device with the lifting action of the rotary tiller has important practical significance for simplifying the operation and improving the farming efficiency. For example, the patent document whose publication number is CN102823352A discloses a rotary tiller with an automatic clutch device, including a liftable rotary tiller connected to the frame, and the rotary tiller includes a transmission box and a rotary tiller installed on the output shaft of the transmission box. For the tiller, the transmission box body is articulated on the frame with the transmission box input shaft as the axis, and the lifting mechanism is connected to the transmission ...

AI Technical Summary

Problems solved by technology

However, in this technical solution, the lifting action of the rotary tiller is basically synchronous with the clutch state of the belt clutch wheel, which will bring two disadvantages: one is that the maximum torque output by the belt clutch wheel to the rotary tiller is only when the rotary tiller is in the The normal working position can only be realized. If the working position of the rotary tiller is raised for shallow tillage, the belt clutch wheel will automatically exit the fully engaged state and enter the semi-engaged state, unable to output the maximum torque, resulting in a serious decline in the efficiency of rotary tillage; the second is rotary tillage When the machine is lowered from a high position and enters the operation process, it is easy to see that the rotary tiller has been lowered into the soil but has not yet entered the normal rotation state. Partial silting of the soil will greatly increase the rotation resistance of the rotary tiller, which will cause overload damage to the machine tool.

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