Aperiodic straw radial disturbance threshing cylinder assembly

Abstract

The invention discloses a non-periodic straw radial disturbance threshing cylinder assembly and belongs to agricultural machinery. A supporting driving shaft is coaxially and rotatably installed on a left radial plate and a right radial plate of a cage type threshing cylinder through a bearing A and a bearing B, an eccentric shaft is fixedly installed on the supporting driving shaft and located in the cage type threshing cylinder, and threshing and disturbing spike teeth are inserted in a radial through hole in the cage type threshing cylinder in a radial telescopic moving mode. A compression spring is sleeved on the threshing and disturbing spike teeth, the compression spring enables the inner ends of the threshing and disturbing spike teeth to be tightly contacted and matched with the outer surface of the eccentric shaft, and a belt pulley A and a belt pulley B which rotate in opposite directions are respectively and fixedly arranged on a left radial plate of the cage type threshing cylinder and the left end part of the support driving shaft; the assembly is novel, unique, simple and reasonable in structure, good in grain separation effect, low in entrainment loss and high in threshing rate.

Description

Technical Field

[0001] The invention belongs to agricultural machinery, and mainly relates to a threshing drum assembly which can perform non-periodic radial disturbance on straw during threshing operation. Background Art

[0002] At present, in the existing threshing mechanisms, the radial distance between the threshing drum and the concave plate screen arranged on its outer side to cooperate with and complete the threshing operation is fixed. In addition, the threshing spikes are fixed on the threshing drum. It has been found in many years of practical operation that the threshing mechanism of this structure has the problem of large grain loss caused by the threshed grains being entrained in the straw and being difficult to separate during the threshing operation and the low grain threshing rate. Summary of the invention

[0003] The purpose of the present invention is to address the problems existing in the above-mentioned prior art, combine with the actual needs of threshing operations, and develop and design a non-periodic straw radial disturbance threshing drum assembly, so as to significantly reduce and minimize the grain entrainment loss in threshing operations and improve the grain threshing rate.

[0004] The purpose of the invention is achieved as follows: a support drive shaft is coaxially and rotatably installed through bearings A and B at a position between the left and right spokes of a cage threshing drum, an eccentric shaft is fixedly installed on the support drive shaft at a position inside the cylinder cavity of the cage threshing drum, threshing and disturbance spikes are respectively inserted in a plurality of radial through holes on the cage threshing drum so as to be radially telescopically movable, a compression spring is sleeved on the threshing and disturbance spikes, an inner end of the compression spring is axially positioned on the threshing and disturbance spikes, an outer end of the compression spring is in extrusion contact with an inner wall surface of the cage threshing drum, the compression spring brings the inner end of the threshing and disturbance spikes into close contact with the outer surface of the eccentric shaft, a pulley B and a pulley A with opposite rotation directions are respectively fixedly installed on the left spoke of the cage threshing drum and the left end of the support drive shaft, thereby forming a non-periodic straw radial disturbance threshing drum assembly.

[0005] The invention adopts a threshing and disturbing spike structure capable of radially repetitive telescopic movement. During operation, a non-periodic variable gap movement is generated between the threshing and disturbing spikes and the concave plate screen fixedly arranged on the outer side of the threshing drum. While increasing and decreasing the threshing gap, the straw is effectively disturbed to cause it to shake loosely, and the threshed grains are separated from the straw layer, which greatly reduces the entrainment loss and improves the grain detachment rate. The invention has the characteristics of novel, unique, simple and reasonable structure, good grain separation effect, less entrainment loss and high grain detachment rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1It is an exploded diagram of the overall structure of the non-periodic straw radial disturbance threshing drum assembly;

[0007] Figure 2 It is a three-dimensional schematic diagram of the overall structure of the non-periodic straw radial disturbance threshing drum assembly;

[0008] Figure 3 It is a two-dimensional schematic diagram of the overall structure of the non-periodic straw radial disturbance threshing drum assembly;

[0009] Figure 4 yes Figure 3 AA cross-section diagram.

[0010] Description of part numbers in the figure:

[0011] 1. Pulley A, 2. Pulley B, 3. Support drive shaft, 4. Eccentric shaft, 5. Threshing and disturbance spikes, 6. Compression spring, 7. Cage threshing drum, 7-1, radial through hole, 7-2, left spoke plate, 7-3, right spoke plate, 8. Bearing A, 9. Bearing B. DETAILED DESCRIPTION

[0012] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. A non-periodic straw radial disturbance threshing drum assembly, wherein a support drive shaft 3 is coaxially and rotatably installed at a position between a left spoke 7-2 and a right spoke 7-3 of a cage threshing drum 7 through a bearing A8 and a bearing B9, an eccentric shaft 4 is fixedly installed on the support drive shaft 3 at a position inside the cylinder cavity of the cage threshing drum 7, threshing and disturbance spike teeth 5 are respectively inserted in a plurality of radial through holes 7-1 on the cage threshing drum 7 so as to be radially telescopically movable, a compression spring 6 is sleeved on the threshing and disturbance spike teeth 5, an inner end of the compression spring 6 is axially positioned on the threshing and disturbance spike teeth 5, an outer end of the compression spring 6 is in extrusion contact with an inner wall surface of the cage threshing drum 7, the compression spring 6 brings the inner end of the threshing and disturbance spike teeth 5 into close contact with the outer surface of the eccentric shaft 4, and a pulley B2 and a pulley A1 with opposite rotation directions are respectively fixedly installed on the left spoke 7-2 of the cage threshing drum 7 and the left end of the support drive shaft 3.

[0013] During operation, the external power drives the pulley A1 and the pulley B2 to rotate in opposite directions respectively. The rotating pulley A1 drives the eccentric shaft 4 to rotate under the support of the left spoke plate 7-2 and the right spoke plate 7-3 through the supporting driving shaft 3. At the same time, the pulley B2 with the opposite rotation direction drives the threshing and disturbance spike teeth 5 inserted in the radial through hole 7-1 to rotate circumferentially as a whole through the left spoke plate 7-2 and the cage threshing drum 7. Under the joint pushing and squeezing action of the eccentric shaft 4 and the compression spring 6, the threshing and disturbance spike teeth 5 perform non-periodic radial telescopic motion on the cage threshing drum 7, complete radial disturbance of the straw, produce pushing and loosening shaking effects, separate the detached grains entrained in the straw layer, reduce entrainment losses, and at the same time enhance the threshing operation capacity of the grains and improve the threshing rate.

Claims

1. A non-periodic straw radial disturbance threshing drum assembly, characterized in that: A support drive shaft (3) is coaxially and rotatably mounted between a left spoke (7-2) and a right spoke (7-3) of a cage-type threshing drum (7) through a bearing A (8) and a bearing B (9); an eccentric shaft (4) is fixedly mounted on the support drive shaft (3) at a position inside a cylinder cavity of the cage-type threshing drum (7); threshing and disturbance spikes (5) are respectively inserted into a plurality of radial through holes (7-1) on the cage-type threshing drum (7) in a radially telescopic manner; a compression spring (6) is sleeved on the threshing and disturbance spikes (5). On the spike teeth (5), the inner end of the compression spring (6) is axially positioned on the threshing and disturbance spike teeth (5), the outer end of the compression spring (6) is in extrusion contact with the inner wall surface of the cage threshing drum (7), the compression spring (6) makes the inner end of the threshing and disturbance spike teeth (5) and the outer surface of the eccentric shaft (4) in close contact, and the left spoke plate (7-2) of the cage threshing drum (7) and the left end of the supporting drive shaft (3) are respectively fixed with a pulley B (2) and a pulley A (1) with opposite rotation directions.

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