CN2648798Y

CN2648798Y - Coaxial different-speed dual beater device for combined harvester

Info

Publication number: CN2648798Y
Application number: CN 200320109009
Authority: CN
Inventors: 张奋飞
Original assignee: Zhongshou Xingguang Combine Manufacturing Co ltd Huzhou City
Current assignee: Xingguang Agricultural Machine Co Ltd
Priority date: 2003-10-15
Filing date: 2003-10-15
Publication date: 2004-10-20
Anticipated expiration: 2013-10-15

Abstract

The utility model provides a coaxial different-speed dual threshing cylinder device for a combined harvester, which consists of a front threshing cylinder and a rear threshing cylinder, the front end and rear ends of the two threshing cylinder with same or similar diameters are adjacent but not connected . A central shaft of the front threshing cylinder is a hollow shaft. The central shaft of the rear threshing cylinder passes through the hollow central shaft of the front threshing cylinder and is supported on a bearing positioned inside two ends of the hollow shaft. A belt pulley arranged on the central shaft of the front threshing cylinder is larger than that of a belt pulley arranged on the central shaft of the rear threshing cylinder, and two belt pulleys are connected with a power input shaft of the combined harvester at the same time. As the utility model adopts the dual threshing cylinder with different rotary speeds for threshing, the contradiction of the balance between the rate of the cleaned grain and the broken rate of the harvest existed in the combined harvester for a long time is effectively solved. The utility model has simple and compact structure, and facilitates the technical transformation without needing to change the shape, structure and layout position of the original grain threshing chamber of the combined harvester.

Description

The coaxial core friction speed double threshing cylinder device of combine

Technical field

The utility model relates to the mechanical threshing device of combine, especially is suitable for the mechanical threshing device of paddy rice.

Background technology

The sheller unit of existing grain combine includes dressing mechanisms such as tooth-like threshing cylinder of nail (bow) and concave grate.During the threshing cylinder high speed rotating, its cylinder spike-tooth constantly impacts the rice bar that is fed, thereby the grain that makes mature and plump splits away off from the rice bar soon and enters concave grate, but some not very the grain of mature and plump then difficult drop-off get off, and dumped waste with straw.If will improve the paddy threshing performance, need improve the rotating speed of cylinder, also promptly improve the intensity that impacts of its spike-tooth, impact intensity yet improved, can increase the percentage of damage of mature and plump grain greatly.General provision, the percentage of damage of rice threshing should not surpass 2%, otherwise will have a strong impact on the storage and the seed germination rate of paddy.

Summary of the invention

The technical problem that the utility model quasi-solution is determined is to provide a kind of threshing performance height percentage of damage low efficient grain threshing device for grain combine.

The technical scheme that addresses the above problem is: it is abutted mutually by the front and back end and preceding threshing cylinder and the rear threshing roller with identical or close diameter that do not join are formed, the central shaft of preceding threshing cylinder is a hollow shaft, in its two ends bearing is installed, the hollow shaft of threshing cylinder and being supported on the bearing in the hollow shaft two ends before the central shaft of rear threshing roller passes, on the preceding threshing cylinder central shaft bigger driving pulley is installed, less driving pulley is installed on the rear threshing roller central shaft, and two belt pulleys are connected with the clutch power input shaft of combine simultaneously.

Outstanding effect of the present utility model is: combine is when work, the rice bar is introduced into more slow-revving preceding threshing cylinder, the caducous grain of mature and plump is split away off fast, the rice bar that does not purify as yet then enters the higher rear threshing roller of rotating speed again, make on the rice bar remaining than difficult drop-off not very the grain of mature and plump under more powerful impacting, split away off, thereby solved this contradiction that harvesting threshing performance that grain combine for a long time exists and percentage of damage can not finely not taken into account effectively.Facts have proved that paddy rice threshing performance of the present utility model reaches 99.9%, and percentage of damage only is below 1%.The utility model is simple in structure, compact, does not need to change shape, the structure and layout position of former grain combine threshing chamber, thus the technological transformation of convenient former type.

Description of drawings

Accompanying drawing is a normal cross-section structural representation of the present utility model.

Embodiment

As accompanying drawing, be installed on preceding threshing cylinder 6 and rear threshing roller 8 in the grain combine threshing chamber 9, its front and back end abuts mutually and does not join, and the equal diameter concentric, the central shaft 4 of preceding threshing cylinder 6 is a hollow shaft, its leading section is supported on the bearing 13 that is located on the threshing chamber, the hollow center axle is equipped with bearing 7 in 4 two ends, the central shaft 5 of rear threshing roller 8 passes preceding threshing cylinder central shaft 4, and its front portion is supported on the two bearings 7, and the rear end is supported on the bearing 10 that is installed on the threshing locular wall; Before come off and bigger driving pulley 2 be installed on the drum central axis 4, less driving pulley 1 is installed on the rear threshing roller central shaft 5, two driving pulleys 1,2 are connected with clutch power input shaft 12 simultaneously, therefore, the rotating speed of preceding threshing cylinder 6 is less than rear threshing roller 8, and the length that is shorter in length than or equals rear threshing roller 8 of preceding threshing cylinder 6.During combine work, the rice bar of cutting off is fed the import 3 of threshing chamber, and lead under the guiding of careless groove at threshing chamber cover plate back side spiral, earlier through than the impacting of the preceding threshing cylinder 6 of low-rotate speed, the grain of the mature and plump that comes off is sent on the higher rear threshing roller of rotating speed 8 then, accept impacting of higher speed brute force, purify remaining not fuller grain on the rice bar, the straw that purifies grain is at last discharged from threshing chamber straw outlet 11, and grain then falls into the concave grate below the threshing cylinder.

Claims

1, a kind of coaxial core friction speed double threshing cylinder device of combine, the preceding threshing cylinder (6) with identical or close diameter that it is characterized in that it to be abutted mutually by the front and back end and do not join is formed with rear threshing roller (8), the central shaft (4) of preceding threshing cylinder (6) is a hollow shaft, bearing (7) is installed in its two ends, the central shaft (5) of rear threshing roller (8) passes the hollow center axle (4) of preceding threshing cylinder and is supported on the two bearings (7), on the preceding threshing cylinder central shaft (4) bigger driving pulley (2) is installed, less driving pulley (1) is installed, two driving pulleys (1) on the rear threshing roller central shaft (5), (2) be connected with the clutch power input shaft (12) of combine simultaneously.

2,, it is characterized in that the length that is shorter in length than or equals rear threshing roller (8) of preceding threshing cylinder (6) by the coaxial core friction speed double threshing cylinder device of the described combine of claim 1.