Threshing cylinder with axially reciprocating spike shaft

Abstract

The axial reciprocating moving threshing cylinder with threshing spike belongs to agricultural machinery; the left end of the cylinder shaft is rotatably inserted into the fixedly arranged end face annular groove cam, the support driving spoke and the driving pulley are fixedly arranged on the right end of the cylinder shaft, N circular spokes are fixedly arranged between the end face annular groove cam and the support driving spoke, the tooth seat rod is axially reciprocatingly supported and inserted on the circular spoke, the universal wheel is arranged on the left end of the tooth seat rod, the universal wheel is in inserted rolling contact with the end face annular groove cam, and the pressure spring is in extruding contact between the tooth seat rod and the support driving spoke; the cylinder realizes the axial reciprocating movement of the threshing spike relative to the cylinder shaft, the loss of the grain entrainment is small, the grain recovery rate is high, and the structure is unique, reasonable and simple.

Description

Technical Field

[0001] This invention belongs to agricultural machinery and mainly relates to a tangential flow threshing drum. Background Technology

[0002] The threshing drum is one of the key operating components on threshing machines and combine harvesters, influencing and determining the quality and efficiency of the threshing operation. Currently, most tangential-flow threshing devices used in my country employ a structure of threshing spikes or threshing bows fixed on the threshing drum base plate along the radial direction of the drum's main shaft. During the combing operation, the threshing spikes or threshing bows rotate circumferentially with the threshing drum to comb the grains. Years of practical experience have shown that during the threshing process, a large amount of straw becomes entangled on the threshing spikes or threshing bows, creating an excessively thick straw layer. This prevents many combed grains from penetrating the straw layer and separating from it, resulting in significant grain loss and reduced grain recovery rate. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the prior art and, in combination with the actual needs of grain threshing operations, to develop a tangential flow threshing drum with integral axial reciprocating threshing teeth, thereby reducing the loss of grains entrained in the straw layer and improving the grain threshing recovery rate during threshing operations.

[0004] The objective of this invention is achieved as follows: The left end of the drum spindle is radially and axially positioned and rotatably inserted into the center hole of a fixedly configured end-face annular groove cam. A support drive spoke and a drive pulley are sequentially fixed on the right end of the drum spindle. N circular spokes are sequentially fixed on the part of the drum spindle located between the right side of the end-face annular groove cam and the left side of the support drive spoke. A toothed rod is radially and circumferentially positioned and axially reciprocatingly supported on the circumferential edge of the circular spokes. Threshing nails are fixed on the toothed rod. A caster is installed on the left end of the toothed rod. The caster has an insert rolling contact with the annular cam groove of the end-face annular groove cam. A pressure spring is arranged between the right end face of the toothed rod and the left end of the support drive spoke. The left and right end faces of the pressure spring have a pressing contact with the toothed rod and the support drive spoke, respectively. This constitutes a tangential flow threshing drum with axial reciprocating movement of the threshing nails as a whole.

[0005] This invention utilizes a combination of an annular groove cam and a pressure spring. The toothed rod drives the threshing nails to reciprocate left and right relative to the axis of the drum main shaft. This causes the threshing nails to disturb, tear, and loosen the straw layer wrapped around it, separating the grains trapped in the straw layer. It features a novel, unique, reasonable, and simple structure, resulting in less loss of grains trapped in the straw layer during threshing and a high grain recovery rate.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 is the three-dimensional schematic diagram of the overall structure of the threshing cylinder with axial reciprocating movement of the whole threshing spike;

[0007] Figure 2 is the two-dimensional schematic diagram of the overall structure of the threshing cylinder with axial reciprocating movement of the whole threshing spike;

[0008] Figure 3 is Figure 2 is the enlarged three-dimensional schematic diagram of part A.

[0009] Explanation of parts in the figure:

[0010] 1, cylinder main shaft, 2, end face ring groove cam, 3, universal wheel, 4, threshing spike, 5, circular web plate, 6, tooth seat rod, 7, pressure spring, 8, support driving web plate, 9, driving pulley. DETAILED DESCRIPTION

[0011] The embodiments of the present application will be described in detail below with reference to the accompanying drawings. A threshing cylinder with axial reciprocating movement of the whole threshing spike, comprising a cylinder main shaft 1, the left end of the cylinder main shaft 1 is radially and axially positioned and circumferentially rotatably inserted into the center hole of the fixedly configured end face ring groove cam 2, the support driving web plate 8 and the driving pulley 9 are sequentially fixed on the right end of the cylinder main shaft 1, N circular web plates 5 are sequentially fixed between the right side of the cylinder main shaft 1 and the left side of the support driving web plate 8, tooth seat rods 6 are radially and circumferentially positioned and axially reciprocatingly supported on the circumferential edge of the circular web plate 5, threshing spikes 4 are fixed on the tooth seat rods 6, universal wheels 3 are installed on the left end of the tooth seat rods 6, the universal wheels 3 are in inserted rolling contact with the ring cam groove of the end face ring groove cam 2, pressure springs 7 are arranged between the right end face of the tooth seat rods 6 and the left end of the support driving web plate 8, the left and right end faces of the pressure springs 7 are in extrusion contact with the tooth seat rods 6 and the support driving web plate 8 respectively.

[0012] When the threshing operation is used, the whole threshing cylinder is supported and installed on the threshing machine or the combine harvester by the end face annular groove cam 2 and the support driving spoke 8 through the cylinder main shaft 1. The external power is transmitted to the circular spoke 5 and the support driving spoke 8 through the driving pulley 9 and the cylinder main shaft 1, and the circular spoke 5 rotates synchronously. The circular spoke 5 rotates around the cylinder main shaft 1, and the threshing tine 4 completes the threshing operation on the cut-flow feeding crop straw and grains. At the same time, the universal wheel 3 on the left end of the tooth holder rod 6 rotates along the annular cam groove of the end face annular groove cam 2, and the tooth holder rod 6 drives the threshing tine 4 to move left and right on the circular spoke 5 relative to the cylinder main shaft 1 under the axial thrust of the right end of the tooth holder rod 6 and the left end of the pressure spring 7. The threshing tine 4 completes the disturbance, tearing and loosening of the straw layer, so that the grains in the straw layer are separated from the straw layer, and the operation purpose and effect of reducing the loss of the grains are achieved.

Claims

1. A threshing spike tooth integral axial reciprocating movement cut-flow type threshing cylinder comprising a cylinder main shaft (1), characterized in that: The left end of the roller spindle (1) is radially and axially positioned, circumferentially rotatable inserted in the center hole of the fixedly arranged end face annular groove cam (2), the support driving spoke (8) and the driving pulley (9) are fixedly arranged in sequence on the right end of the roller spindle (1), N circular spokes (5) are fixedly arranged in sequence between the right side of the roller spindle (1) and the left side of the support driving spoke (8), the tooth seat rod (6) is radially and circumferentially positioned, axially reciprocatingly supported and inserted in the circumferential edge part of the circular spoke (5), the threshing spike tooth (4) is fixedly arranged on the tooth seat rod (6), the universal wheel (3) is arranged on the left end of the tooth seat rod (6), the universal wheel (3) is in inserted rolling contact with the annular cam groove of the end face annular groove cam (2), the pressure spring (7) is arranged between the right end face of the tooth seat rod (6) and the left end of the support driving spoke (8), the left and right end faces of the pressure spring (7) are in extrusion contact with the tooth seat rod (6) and the support driving spoke (8) respectively.

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