Construction Characteristics and Safe Use of Disc Harrow


The round plate rake is a cultivated land preparation machine, which can work on cultivated land or uncultivated land, and has strong work adaptability. This paper introduces the structural characteristics of the disc harrow, emphasizes the matters needing attention in the safe use of the disc support, improves people's safety awareness, and reduces the occurrence of man-made injury accidents. Then, let's understand the structural characteristics and safe use of the disc harrow together!

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1. Structural characteristics of round plate rake

The disc harrow is generally composed of rake group, rake, angle adjustment mechanism, hitch device and other parts. The rake group is composed of rake plate, partition plate, prism shaft, bearing and scraper, and there is a square hole in the center of rake plate running through the top of prism shaft. When working, the rake piece rotates with the square shaft, the two ends of the square shaft are tightened with nuts, the rake group is integrated through the square shaft, the bearing is connected with the rake table, and the center of the coaxial rake piece is separated by a partition plate. With the lever, any cut on the tooth plate can be hung on the bracket, and the rake group can be swung around the hinge point through a series of linkage mechanisms to obtain different deflection angles. The hook device disc harrow is connected to the tractor via a towing device or a suspension device.

During the rake bucket, the disc rolls forward under the action of traction force, and the rake bucket cuts into the soil to a certain depth under the action of gravity and soil reaction force. The combined motion of the raking can be decomposed into pure rolling and non-rotational translational motion, so the trajectory of any point of the raking is spiral.

2. Safe use technology of disc harrow

Quality and Safety Requirements for 2.1 Disc Harrow

1) The structure of the machine is reasonable, and there is no danger during operation and maintenance according to the instruction manual. The safety requirements must meet the relevant national standards. Safety signs shall be fixed on dangerous parts, in accordance with the provisions of relevant national standards. For hand-operated parts, the operating surface shall be smooth and free of burrs or sharp corners.

2) When hanging or semi-hanging the rake, "Be careful! In order to safely identify the folding rake "away from the machine", a locking mechanism is required during transportation, "lock the folding rake during transportation" and "be careful! Keep away from the machine "safety sign.

3) The traction rake shall be equipped with safety pins or other devices that can be automatically disconnected when the force exceeds the limit. The specified materials and specifications must be used for the bolt type bolt, and any substitution is not allowed.

4) The landing gear mechanism of the disc harrow shall be safe and effective, flexible in operation and stable in action. Hydraulic hoses, pipes and accessories shall be properly placed and protected to prevent the liquid from directly splashing on the operator at the operation position when it is broken.

5) Transportation clearance of disc harrow: traction harrow shall not be less than 150mm, hoisting harrow and semi-hoisting harrow shall not be less than 200mm; The transportation clearance of auxiliary disc harrow for small tractors below 18 kW is not limited to this.

6) The operating instructions shall record the precautions for safe operation and the safety contents of maintenance, and shall comply with the provisions of relevant national standards. If a safety sign is posted on a mechanical appliance, it shall be stated in the specification, and the place of posting on the mechanical appliance shall be stated. For safety signs shown in hazard graphics, the meaning of the signs must be explained.

Precautions for Safe Use of 2.2 Disc Harrow

1) Before use, check whether the fastening bolts and nuts are loose, especially the square shaft nut must be tightened. Please tighten and lock the nut at the front end of the square shaft, and do not loosen the rake. Otherwise, the inner hole of the rake will bite the prism axis round. The thickness of rake tooth is less than 0.5mm, the length of tool tip defect is less than 15mm, one rake tooth defect shall not exceed 3, and the square shaft shall be flat without defect.

2) The lifting and falling of the hanging rake must be slow and stable, and forced operation is not allowed, and the rake must not be pressed on the soil with human weight. Please work slowly when moving partitions or through the ridge. When the rake is hung for transportation, the lifting handle must be fixed, the stop chain must be adjusted appropriately, and the pull rod must be shortened to ensure the required transportation clearance.

3) Repair, inspection and adjustment of rake teeth are strictly prohibited during work. The tractor rake bucket operation is not allowed to make sharp turns, and the towing rake bucket is not allowed to retreat. The turning and retreat of the hanging rake bucket must be carried out after lifting the rake bucket. When replacing the toothing or clearing the toothing fault, the tractor must first put out the fire or unhook.

4) The safety pin of the drawbar is only allowed to be processed and replaced with low-carbon steel, and it is not allowed to replace it with other materials or change the size at will. Do not use stones, iron and other hard objects to weight the weight box of the rake. Weight boxes and rakes are strictly prohibited.

5) In case of serious soil or mountain dragging phenomenon, the cause shall be analyzed and eliminated, and no compulsory operation shall be allowed. When the rake is close to the ground, please do not touch the ridge or stone ridge. After parking, the suspension device is grounded, and parking in frequent suspension state is not allowed.

6) When reprinting partitions or short-distance transportation, the rake tooth working mechanism must be lifted to the highest position and locked, the agricultural tools are in the transportation position, and the chain is fastened. During transportation, no person or heavy object shall be placed on the rake. High speed driving and sharp turns are prohibited. Long-distance transportation must be carried by rake, machine or whole armored vehicle, and it is not allowed to carry rake.

The above is the structural characteristics of the disc harrow and safe use, if you need to know more, you can contact us at any time!


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