Corn thresher

self-propelled

Overview
Front-shovel, self-suction corn thresher designed for on-site road and yard threshing. Self-propelled multi-axis models enable continuous automatic feeding and high-capacity operation.

Working principle
When the vehicle moves, the U-shaped front shovel collects ears from the ground. An auger in the shovel feeds maize into a conveying channel; the conveyor belt and scraper transfer material to the threshing mechanism. High-speed rotating threshing rollers with swinging hammers peel kernels from cobs. Sieves separate cobs and kernels, and fans remove dust and light impurities to complete threshing.

Structural features
Usually equipped with a hydraulic front shovel; widened shovel options improve feeding. The machine includes transmission channels, conveyor belts and multiple threshing drums (three-, five- or six-axis). Available with fully enclosed cabs, telescopic suction drums and 360° hydraulic high-level unloading for easy grain discharge.

Performance advantages
Automatic feeding eliminates manual input, enabling high work rates (example: approx. 20,000 kg/h for model 2025). Good kernel separation with low impurity content and the mobility to operate at roadsides, courtyards and varied fields.

Power configuration
Typical power starts from 22 hp; medium and large models commonly use diesel engines in the 90–130 hp range to ensure stable operation.

Example — Self-suction model 2025
The 2025 self-suction five-axis self-propelled model can thresh about 20,000 kg per hour. It is equipped with a Xichai Sida 120 hp or Anhui Quanchai 130 hp engine, offers two feeding modes (air-suction and spiral front-shovel feeding), a fully enclosed cab, telescopic suction drum, 360° hydraulic rotating high-level unloading and an enlarged cob bin.

Technical advantages

• Efficient threshing: multi-axis drums feed simultaneously and separate kernels quickly under high-speed rotation, enabling high net threshing rates.
• Thorough impurity removal: whistle-type or large centrifugal fans remove dust and light impurities and may collect dust to reduce pollution.
• Versatile feeding methods: dual-mode wind suction and front-shovel feeding adapt to road threshing and stacked storage scenarios.
• Operator convenience: many self-propelled models provide fully enclosed cabs and optional one-click intelligent controls.

Design features
Robust industrial design with options for self-propelled or towed configurations; customizable for regional requirements.

Working process

• (1) Feeding process: Spiral front shovel or air-suction feeder lifts ears and feeds them via conveyor chain or auger; suction uses negative pressure to admit ears from varied stacking.
• (2) Threshing process: Ears enter a multi-axis threshing drum (five- or six-axis). Wear-resistant elements on the drum interact with the concave plate under high-speed rotation to detach kernels; cobs move rearward and exit via the discharge port.
• (3) Selection and separation process: A) Screening: kernels, broken grains and impurities pass onto vibrating sieves and are separated by size and density. B) Air selection: fans generate airflow to remove light impurities such as leaves and dust; some models collect the dust.
• (4) Unloading process: Clean kernels are conveyed to the grain bin and discharged to transport vehicles using telescopic suction drums and a hydraulically controlled, 360° rotatable high-level unloading device.

Maize sheller Technical Parameter

• Model: multiple model entries (example: 2025)
• Supporting power (hp): example values include 65, 80, 90, 90/120/130, 93
• Front shovel width (mm): commonly 2100; some models up to 2500
• Feeding mode: scraper and chain (standard)
• Drive mode: manual transmission (example entries)
• Working efficiency: ranges from 10–30 acre/h up to 60–100 acre/h depending on model
• Tire model: examples include 9.50-20, 6.50/16, 11.20-20, 11.20-24
• Overall weight (kg): examples include 3250, 4500, 5500
• Overall dimension (L*W*H mm): examples include 5000*2100*3000; 6300*2300*3300; 7300*2500*3200

Specifications

• Supporting power (hp): examples shown include 65; 80; 90; 90/120/130; 93
• Front shovel width (mm): commonly 2100 (some models up to 2500)
• Feeding mode: Scraper and chain (standard)
• Drive mode: Manual transmission
• Working efficiency: 10–100 acre/hour depending on model
• Tire model: examples include 9.50-20, 6.50/16, 11.20-20, 11.20-24
• Overall weight (kg): examples include 3250, 4500, 5500
• Overall dimensions (L*W*H mm): examples include 5000*2100*3000; 6300*2300*3300; 7300*2500*3200