Longitudinal axial flow drum structure having adjustable threshing diameter

Patent metadata

Field	Value
Publication number	US-11304371-B2
Application number	US-201816763234-A
Country	US
Kind code	B2
Filing date	Mar 28, 2018
Priority date	Feb 8, 2018
Publication date	Apr 19, 2022
Grant date	Apr 19, 2022

Abstract

A longitudinal axial flow drum structure having an adjustable threshing diameter includes a threshing drum, a transmission mechanism, a diameter regulating mechanism and a regulating steel wire pulling mechanism. The transmission mechanism delivers power to regulating devices of the diameter regulating mechanism. The diameter regulating mechanism is connected with the transmission mechanism and the threshing drum to enable threshing diameter regulation. The transmission mechanism and the diameter regulating mechanism are installed inside a feeding cylinder of the threshing drum. The threshing diameter is regulated in real-time and stepless manner by adjusting the regulating steel wire pulling mechanism to pull a regulating steel wire in the transmission mechanism.

First claim

What is claimed is:

1. A longitudinal axial flow drum structure having an adjustable threshing diameter, the longitudinal axial flow drum structure comprising a threshing drum, a transmission mechanism and a diameter regulating mechanism,
wherein the diameter regulating mechanism comprises a plurality of regulating turntables, a plurality of crank linkages and an adapter sleeve, the threshing drum comprises a drum shaft, and a feeding wheel, a front supporting plate, a middle supporting plate and a rear supporting plate that are installed in the drum shaft in sequence along a feeding direction from front to rear, and a plurality of threshing tooth rods; the middle supporting plate is provided with a plurality of U-shaped grooves in a periphery thereof, the front supporting plate, both sides of the middle supporting plate and the rear supporting plate are installed with the regulating turntables that are fixedly connected to each other through the adapter sleeve sleeved over the drum shaft, the middle supporting plate is bored with a plurality of through holes, the regulating turntables arrayed along the both sides of the middle supporting plate are connected via bolts passing through the through holes; one end of each of the crank linkages is fixed in a corresponding one of the regulating turntables, the other end of each of the crank linkages is connected with a respective one of the threshing tooth rods inserted into a respective one of the U-shaped grooves;
the transmission mechanism, serving as a power source of the diameter regulating mechanism, is fixed on the front supporting plate.

2. The longitudinal axial flow drum structure having an adjustable threshing diameter as claimed in claim 1 , wherein the drum shaft has a hollow section from a front end of the drum shaft to the front supporting plate, two radial through holes are opened symmetrically on both sides of the hollow section of the drum shaft; the transmission mechanism is a worm and gear mechanism and includes two regulating steel wires, two steering wheels, a worm gear, a worm, a supporting ring and two bearing seats; the supporting ring is concentrically installed together with the drum shaft in the front supporting plate, the worm gear is installed in the supporting ring, the worm, meshing with the worm gear, is fixed in the front supporting plate at both ends with the two bearing seats, the two steering wheels are respectively located below both ends of the worm and at two sides of the wonii gear, and keep parallel to the radial through holes on the both sides of the drum shaft; the two regulating steel wires pass into the hollow section via the front end of the drum shaft and pass out of the two radial through holes respectively, and bypass the steering wheels to connect with the worm at both ends respectively in twined manner, the front supporting plate is bored with a plurality of through holes, the worm gear and the regulating turntable in the other side of the front supporting plate are connected by bolts that pass through the through holes.

3. The longitudinal axial flow drum structure having an adjustable threshing diameter as claimed in claim 2 , further comprising a regulating steel wire pulling mechanism, including a left rotating lever, a right rotating lever, a center shaft of the left rotating lever, a center shaft sleeve of the right rotating lever and two regulating handles, wherein lower ends of the left rotating lever and of the right rotating lever are connected with two regulating steel wires thereof respectively, the left rotating lever is connected with the center shaft of the left rotating lever through a revolute pair, the right rotating lever is connected with the center shaft sleeve of the right rotating lever through a revolute pair, the right rotating lever is installed in the center shaft of the left rotating lever, the two regulating handles are connected with the center shaft of the left rotating lever and the center shaft sleeve of the right rotating lever respectively.

4. The longitudinal axial flow drum structure having an adjustable threshing diameter as claimed in claim 2 , wherein a circle diameter of the hollow section in the front end of the drum shaft measures 15˜20 mm; the two radial through holes are arranged in places which are 240 mm and 260 mm from the front end of the drum shaft respectively, and have a diameter measuring 10˜15 mm.

5. The longitudinal axial flow drum structure having an adjustable threshing diameter as claimed in claim 2 , wherein a helix angle of the worm is less than 5 degrees.

6. The longitudinal axial flow drum structure having an adjustable threshing diameter as claimed in claim 1 , wherein a side surface of the front supporting plate and a side surface of the rear supporting plate that face each other are provided with a plurality of radially-extended slide rails, and both end portions of each of the threshing tooth rods are respectively engaged with the slide rails.

7. The longitudinal axial flow drum structure having an adjustable threshing diameter as claimed in claim 6 , wherein tooth rod travelers are welded at both ends of each of the threshing tooth rods, which is engageable into grooves of the slide rails.

8. The longitudinal axial flow drum structure having an adjustable threshing diameter as claimed in claim 6 , wherein each of the U-shaped grooves has a width in a peripheral direction and a depth in a radial direction, the width is the same as a diameter of the threshing tooth rods, and the depth of each of the U-shaped grooves measures 50˜60 mm.

9. The longitudinal axial flow drum structure having an adjustable threshing diameter as claimed in claim 8 , wherein an outer diameter of the worm gear measures 200˜250 mm; a tooth length of the worm measures 55˜65 mm; an outer diameter of the regulating turntable measures 150˜200 mm; a length of the crank linkage measures 150˜200 mm; a length of the slide rail measures 50˜60 mm; an adjustable range of the threshing diameter measures 10˜30 mm.

10. The longitudinal axial flow drum structure having an adjustable threshing diameter as claimed in claim 8 , wherein each regulating turntable shares same number of the connected threshing tooth rods.

Assignees

• Univ Jiangsu

Inventors

• Li Yaoming
• Su Zhan
• Tang Zhong

Classifications

• A01F7/06 Primary

  with axles in line with the feeding direction {; Axial threshing machines} · CPC title

• A01F12/181 Primary

  Adjustable threshing mechanisms · CPC title

• A01F12/22 Primary

  Threshing cylinders with teeth · CPC title