A bottom door system with overload protection

Abstract

The invention discloses a bottom door system with overload protection. A plurality of strip-shaped knife edges are set through, and a hydraulic buffer is provided on the top surface of the cavity on the left and right sides. The present invention cooperates with the same central shaft by setting fourteen chopping knives to ensure that the fourteen chopping knives can be raised or lowered at the same time, so as to meet the user's demand for the length of straw and the matching power of the chopping knives. The bottom knife wheel cooperates with the bottom knife tension spring to recover the shredding knife after being hit by foreign objects, and the bottom knife cylinder between the bottom door welding and the connecting rod welding uses the principle of lever to amplify the hydraulic pressure to overcome the bottom The elastic force of the knife extension spring realizes the automatic recovery of the chopping knife after being hit by foreign objects, effectively provides protection for the chopping knife, avoids major damage to the chopping knife, and prolongs the service life of the chopping knife.

Description

technical field [0001] The invention relates to the technical field of agricultural machinery, in particular to a bottom door system with overload protection. Background technique [0002] The bottom door system is an important part of the baler. It is located below the feeding device and connects the feeding device with the cabin. It has two main functions: one is when the material input is too much or the material cannot be transported to the cabin in time, but accumulates in the feeding device, causing the material to choke. At this time, you can discharge the material by opening the bottom door, and then close the bottom door to work normally; the other is that the bottom door system can be equipped with a chopping knife. When the picked-up material is the whole straw, it needs to be chopped. Then enter the cabin. [0003] Take the American Wittmann baler (404PRO) as an example. The structure of the bottom door system is as follows: two completely penetrating central...

AI Technical Summary

Problems solved by technology

[0004] There are certain defects in the above-mentioned technical means: 1. According to the needs of current users, when picking up the whole straw, no matter whether it is a single 8 chopping knives or a single 9 chopping knives, the length of the straw to be cut is still too long , when 17 knives are raised at the same time, although the length of straw cutting meets the user's requirements, the power of the tractor needs to be increased at this time, and the standard 120-horsepower tractor is not enough.

2. The bottom door system uses a two-way hydraulic cylinder, that is, whether the chopping knife rises or falls, it is mandatory. When foreign objects (such as stones, bricks, etc.) enter the bottom door, the damage to the chopping knife is deadly

Images