CN201640024U

CN201640024U - Threshing rotary drum with speed-changing leaf board

Info

Publication number: CN201640024U
Application number: CN2009202442186U
Authority: CN
Inventors: 王海京
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-27
Filing date: 2009-11-27
Publication date: 2010-11-24
Anticipated expiration: 2019-11-27

Abstract

The utility model relates to a threshing rotary drum with a speed-changing leaf board. Concave boards between a shell and the rotary drum above an axial-flow rotary drum are embedded with each other to form a cylinder-shaped threshing room; the inner wall of the shell is provided with a spiral line guiding plate with a spiral lift angle; a gear rod is connected with an axial radiation board; the gear rod of the axial-flow rotary drum is provided with the speed-changing leaf board; and the gear rod is provided with a plurality of nail gears. The threshing rotary drum simultaneously reduces the use amount of a steel board of the shell of the rotary drum, circular steel of a rotary drum shaft, flat steel of the rotary drum gear rod, supporting angle steel correlative with the rotary drum and the like to reduce the manufacture cost, can increase the yield due to the reduction of straw entrainment ratio, reduces the weight, has simple structure, strong operability and convenient implementation, and can generate good social and economic effects.

Description

The threshing cylinder that has the speed change impeller

Technical field: the utility model relates to a kind of agricultural machinery sheller unit, particularly a kind of threshing cylinder that has the speed change impeller.

Background technology: the sheller unit of combined harvester is the core of reaping machine, is determining the results quality and the productivity ratio of machine to a great extent.Sheller unit is made up of the cylinder and the fixing shell and the notch board of high speed rotating.During work, crop is by the feeding of an end of cylinder, and along with the rotation of cylinder, it is for the helical movement with the cylinder intrados of shell composition that crop is being pasted notch board, flows through sheller unit along the axis direction of cylinder.Mixtures such as grain, clever shell, broken straw, broken leaf are fallen by the notch board hole under the cylinder centrifugal action simultaneously, and the straw grass is then discharged from the other end of cylinder.Axial-flow type drum crop elapsed time in sheller unit long (2-3 second, and cut flow roller crop 0.5-0.8 second only in sheller unit), can fully carry out threshing separates, and can make threshing become soft, can not establish separator separately on machine, therefore present most of combined harvesters all adopt this roll form.The grain that this cylinder makes most of mature and plump is taken off separation preceding half section of cylinder, jejune grain will arrive the second half section and just can take off, the second half section cylinder is also separated the grain that all the other are mixed in the broken straw, but still some grain is mixed in the straw grass and is taken out of cylinder and to cause entrainment loss, for guaranteeing the separating effect of machine, cylinder must have enough length (more than 2m), but the long meeting of cylinder causes the excessive machine weight of machine volume to increase, machines cumbersome and power consumption are increased, and the while has also increased raw materials consumption and has increased manufacturing cost.Therefore, under the prerequisite that guarantees the necessary index of threshing quality, drum length designs short as far as possible.

Summary of the invention: the purpose of this utility model provides a kind of simple in structure, strong operability, the threshing cylinder that has the speed change impeller that production cost is low.The technical solution of the utility model is: a kind of threshing cylinder that has the speed change impeller, the shell of axial-flow type cylinder top and the notch board between the cylinder are spliced and are formed columnar threshing chamber, outer casing inner wall is installed with the helix guide plate with lead angle, ratch is connected with axial disc, a speed change impeller is installed on the ratch of axial-flow type drum, is scattered a plurality of spike-tooths on the ratch.The utility model is installed a speed change impeller on the ratch of axial-flow type drum, play the effect of the crop flip-flop pace of in cylinder, at the uniform velocity advancing of allowing, make and do the deposits yields shake, the peasant provokes stalk with branch grain is separated more fully with straw when threshing grain seemingly, after increasing this mechanism, drum length can shorten 15-20cm, and is not mingled with beans in beanstalk, and stem stalk entrainment rate is 0 substantially.The utility model has been owing to shortened drum length, reduced usage amount when the band steel of round steel, the cylinder ratch of steel plate, the drum shaft of drum shell is equal to the support angle steel relevant with cylinder and reduced production cost; Because the reduction of stalk entrainment rate can increase output (the cylinder entrainment rate that does not have the speed change impeller is 0.4%).Machine weight is alleviated.The utility model, simple in structure, strong operability, it is convenient to implement, and can produce the society and the economic effect of becoming reconciled.

Description of drawings

The cylinder operation principle schematic diagram of Fig. 1 band speed change impeller

The scheme of installation of Fig. 2 speed change impeller on cylinder

Fig. 3 speed change impeller is made the expansion schematic diagram of blanking.

Embodiment:

The utility model as shown in Figure 1 is a kind of threshing cylinder that has the speed change impeller, the shell of axial-flow type cylinder 1 top and the notch board between the cylinder are spliced and are formed columnar threshing chamber, as shown in Figure 2, outer casing inner wall is installed with the helix guide plate with lead angle, ratch 5 is connected with axial disc 3, a speed change impeller 2 is installed on the ratch 5 of axial-flow type drum, is scattered a plurality of spike-tooths 4 on the ratch 5.

The shell of axial-flow type cylinder of the present utility model top and the notch board between the cylinder are spliced and are formed columnar threshing chamber, and outer casing inner wall is installed with the helix guide plate with lead angle, in order to the axially movable speed of control crop.During work, crop is by the feeding of an end of cylinder, and along with the rotation of cylinder, crop is being pasted the cylinder intrados of notch board and shell composition and doing at the uniform velocity screw under the effect of helix guide plate, flows through sheller unit along the axis direction of cylinder.Mixtures such as grain, clever shell, broken straw, broken leaf are fallen by the notch board hole under the cylinder centrifugal action simultaneously, and the straw grass is then discharged from the other end of cylinder.But still some grain is mixed in the straw grass, at this moment the mixture of straw grass, grain is through speed change impeller 2 places, the crop that at the uniform velocity advances is flip-flop pace (forward travel distance and the direction of advance that comprise certain hour) under the acting in opposition of speed change impeller, produce shake, being convenient to grain separates more fully with straw, grain in the mixture of straw grass, grain is shaken off rapidly on notch board, fallen into sorting screen by the notch board hole, the straw grass is not mingled with grain substantially.

As shown in Figure 2, most of grain is taken off separation preceding half section of cylinder, but still some grain is mixed in the straw grass, and the second half section cylinder need be separated all the other grain that is mixed in the broken straw.Therefore, speed change impeller 2 should replace spike-tooth 4 to be installed in the position of cylinder afterbody penult or the 3rd spike-tooth.The method of attachment of speed change impeller and cylinder is: speed change impeller 2 is placed on bar tooth 5 need join the brill rivet hole on the position of installation speed change impeller, connects with clinching method.And connect without bolt, to avoid bolt being linked with to stalk.

Therefore as shown in Figure 3, because the speed change impeller is mounted on the ratch, expect widely should be slightly less than the ratch width; For the riveted that guarantees speed change impeller and ratch has enough intensity and stability, between two rivet holes enough distances should be arranged, but it is principle that mechanism design should and save material with weight reduction, therefore requires on the basis that distance should be arranged between assurance two rivet holes short as far as possible; For guaranteeing that speed change impeller and spike-tooth have the linear velocity of the same cylinder (peripheral speed of bar tooth tip when it is meant the cylinder rotation, excessive, though threshing performance and separation rate can improve, but the strike effect to crop is big, can increase grain fragmentation and power consumption, too small, can have a strong impact on threshing performance and the separation rate of crop).

Claims

1. threshing cylinder that has the speed change impeller, form by cylinder and fixing shell and notch board, it is characterized in that: the shell of axial-flow type cylinder (1) top and the notch board between the cylinder are spliced and are formed columnar threshing chamber, outer casing inner wall is installed with the helix guide plate with lead angle, ratch (5) is connected with axial disc (3), go up an installation speed change impeller (2) at the ratch (5) of axial-flow type drum, ratch (5) is gone up and is scattered a plurality of spike-tooths (4).