Combine harvester double drum structure

Abstract

The present invention provides a double-drum structure for a combine harvester, which includes a frame. Two drums are rotatably mounted on the frame through their respective drum shafts. The axes of the two drums are parallel to each other and are arranged at intervals in the crop conveying direction. A plurality of拨动件 (which should be a specific component name, but since it's not clear in Chinese, keep it as "拨动件" for now) are arranged at intervals along the drum shaft on any one of the drums. An operation area is formed between two拨动件 located at the two ends of the drum, and the widths of the operation areas of the two drums are the same. Crops first enter the first drum from the feeding port, are threshed by the rotation of the first drum and then conveyed by bolts into the second drum located behind, and then are threshed by the rotation of the second drum. Finally, the threshed straw is discharged from the straw discharge area. The travel of the crops in the double-drum structure is in a "冂" shape, and the travel length is the sum of the lengths of the two drums. The threshing travel is long and the threshing effect is obvious. One end of the two drums is flush and the overall axial direction is parallel, without occupying extra space, making the overall structure of the combine harvester compact.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to a double-drum structure of a combine harvester. Background Art

[0002] The threshing system of crawler combine harvesters can be divided into longitudinal axial flow threshing and cleaning system and transverse axial flow threshing and cleaning system. These two types of threshing and cleaning systems are the main structural forms currently used in the market.

[0003] The existing transverse flow threshing and cleaning system is divided into a single-drum transverse flow threshing and cleaning system and a 1.5-drum transverse flow threshing and cleaning system. The single-drum system is threshing by one drum, and the crop travel is the length of one drum. In the 1.5-drum system, a feeding drum with half the length of the single drum is added in front of the single drum, that is, the added half drum only plays the role of continuously feeding the crop, but hardly plays the role of threshing. Therefore, the threshing travel of the existing transverse flow threshing and cleaning system is relatively short.

[0004] When encountering difficult-to-thresh varieties, such a short drum cannot allow the crops to have sufficient time to be threshed inside the drum, and finally some of the fed crops are discharged from the machine before they can be threshed, resulting in poor threshing effect and greater crop losses. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the short threshing stroke and poor threshing effect of the traditional transverse axial flow threshing system in the prior art.

[0006] To this end, the present invention proposes a double-drum structure for a combine harvester, comprising:

[0007] frame;

[0008] Two rollers are mounted on the frame, with their axes parallel to each other and spaced apart in the crop conveying direction;

[0009] A plurality of toggle members are arranged on any of the rollers at intervals along the axial direction of the roller; a working area is formed between two toggle members located at two ends of the roller;

[0010] The working areas of the two rollers have the same width.

[0011] All the toggle members have the same size; the distance from the end surface of any toggle member to the axis of the roller forms the rotation radius of the roller;

[0012] The height from the lowest point of the cylindrical surface formed by the rotation of the roller that contacts the crop later to the horizontal plane is greater than the height from the lowest point of the cylindrical surface formed by the rotation of the roller that contacts the crop earlier to the horizontal plane.

[0013] The rotation radius of the roller that contacts the crop later is smaller than the rotation radius of the roller that contacts the crop earlier.

[0014] The highest point of the cylindrical surface formed by the rotation of the roller that contacts the crop later and the highest point of the cylindrical surface formed by the rotation of the roller that contacts the crop earlier are located at the same horizontal height.

[0015] Any of the drums also includes:

[0016] Roller shaft;

[0017] A plurality of webs are coaxially and spaced apart on the drum shaft; a plurality of mounting portions are spaced apart on the outer circumference of any web;

[0018] A plurality of threshing tooth rods are straddled on all the webs and fixed on the mounting portion; a plurality of shifting members are arranged at intervals on any of the threshing tooth rods.

[0019] The drum also includes:

[0020] A connecting plate, one end of which is welded and fixed on the threshing tooth rod, and the other end of which is detachably fixed on the mounting portion.

[0021] Any of the mounting parts comprises:

[0022] A plurality of groups of adjustment holes; the connecting plate is suitable for being fixed on any group of the adjustment holes to adjust the swing angle of the toggle member relative to the web.

[0023] Any of the installation parts further includes:

[0024] The limiting groove has a groove shape that matches the threshing tooth rod and is suitable for the threshing tooth rod to be embedded.

[0025] The toggle member is a cylindrical toggle tooth.

[0026] The shifting teeth on adjacent threshing tooth rods are arranged at intervals in the axial direction of the drum.

[0027] The technical solution of the present invention has the following advantages:

[0028] 1. The double-drum structure of the combine harvester provided by the present invention includes a frame, and two drums are rotatably installed on the frame through their respective drum shafts. The axes of the two drums are parallel to each other and are arranged at intervals in the crop conveying direction. A plurality of toggles are arranged at intervals along the drum shaft on any one of the drums, and an operation area is formed between the two toggles located at the two ends of the drum, and the widths of the operation areas of the two drums are the same. The crop first enters the first drum from the feeding port, is threshed by the rotation of the first drum and then conveyed by bolts into the second drum located behind, and then is threshed by the rotation of the second drum. Finally, the threshed straw is discharged from the straw discharge area. The travel of the crop in the double-drum structure is in a U-shaped trend, and the travel length is the sum of the lengths of the two drums. The threshing travel is long and the threshing effect is obvious. One end of the two drums is flush and the overall axial direction is parallel, without occupying extra space, making the overall structure of the combine harvester compact.

[0029] 2. In the double-drum structure of the combine harvester provided by the present invention, the height of the lowest point of the cylindrical surface formed by the rotation of the drum that contacts the crop later from the horizontal plane is greater than the height of the lowest point of the cylindrical surface formed by the rotation of the drum that contacts the crop earlier from the horizontal plane. This structural design increases the distance between the drum that contacts the crop later and the horizontal vibrating screen below, and can make the impurities falling from the drum that contacts the crop later to the vibrating screen be fully screened by the wind. Description of the Drawings

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of the double drum in the embodiment of the present invention;

[0032] Figure 2 It is a schematic diagram of the trend of the crop in the double-drum structure in the embodiment of the present invention;

[0033] Figure 3 It is a side view of the double drum in the embodiment of the present invention;

[0034] Figure 4 It is a schematic structural diagram of the first drum in the embodiment of the present invention;

[0035] Figure 5 It is a schematic structural diagram of the second drum in the embodiment of the present invention.

[0036] Description of the Reference Numerals:

[0037] 1. Frame; 2a. First roller; 3a. Second roller; 4a. Roller shaft; 5a. Disc; 51a. Adjustment hole; 52a. Limiting groove; 53a. Disc seat; 6a. Threshing tooth rod; 7a. Driving tooth; 8a. Connecting plate; 9a. Anti-entanglement ring; W. Working area; D. Grass discharge area. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] Example 1

[0043] This embodiment provides a double-drum structure of a combine harvester, including a frame 1, and two drums are rotatably mounted on the frame 1 through respective drum shafts 4a. Figure 1 As shown, the axes of the two rollers are parallel to each other and are arranged at intervals in the direction of crop conveyance. A plurality of shifting members are arranged at intervals along the roller axis 4a on any roller, and a working area W is formed between the two shifting members at the two ends of the roller, and the working areas W of the two rollers have the same width. Figure 2As shown, the crop first enters the first drum 2a from the feeding port, is threshed by the rotation of the first drum 2a and spirally conveyed into the second drum 3a located at the rear, and then threshed by the rotation of the second drum 3a. Finally, the threshed straw is discharged from the straw discharge area D. The travel of the crop in the double-drum structure shows a U-shaped trend, and the travel length is the sum of the lengths of the two drums. The threshing travel is long and the threshing effect is obvious. One end of the two drums is flush and the overall axial directions are parallel, without occupying extra space, making the overall structure of the combine harvester compact.

[0044] The overall structures of the first drum 2a and the second drum 3a are the same. The difference is that a section of straw discharge area D is added at the end of the crop travel of the second drum 3a, as Figure 4 and Figure 5 shown. Any drum includes a drum shaft 4a, several disk plates 5a and multiple threshing tooth rods 6a. In this embodiment, three disk plates 5a are arranged in the working area W of both the first drum 2a and the second drum 3a, and one disk plate 5a is arranged in the straw discharge area D of the second drum 3a. All the disk plates 5a are evenly spaced and fixed on the corresponding drum shaft 4a through disk plate seats 5a.

[0045] Several installation parts are arranged at intervals on the outer circumference of any disk plate 5a. In this embodiment, any installation part includes a limit groove 52a and several groups of adjustment holes 51a arranged on the outer peripheral side of the limit groove 52a. The groove shape of the limit groove 52a matches the threshing tooth rod 6a and is suitable for embedding the threshing tooth rod 6a. The connecting rod is welded and fixed on the threshing tooth rod 6a. The threshing tooth rod 6a and the disk plate 5a are detachably connected together through a connecting plate 8a. Through holes corresponding to any group of adjustment holes 51a are opened on the connecting plate 8a. Bolts pass through the corresponding adjustment holes 51a and the through holes on the connecting plate 8a to fix the threshing tooth rod 6a on the disk plate 5a, and by being fixed in different adjustment holes 51a, the angle adjustment of the拨动件 (the specific name in Chinese is not clear, it may be a misspelling, assuming it is a certain component for threshing) on the threshing tooth rod 6a is realized.

[0046] As Figure 4 shown, in this embodiment, eight limit grooves 52a are opened on any disk plate 5a, among which six limit grooves 52a are evenly spaced on the circumference of the disk plate 5a, and the other two limit grooves 52a are used as spare grooves and are oppositely arranged on the outer circumference of the disk plate 5a. In this embodiment, six threshing tooth rods 6a are arranged and are respectively fixed in six limit grooves 52a evenly distributed on the circumference of the disk plate 5a. Multiple拨动件 (the specific name in Chinese is not clear, it may be a misspelling, assuming it is a certain component for threshing) are arranged at intervals on each threshing tooth rod 6a. In this embodiment, the拨动件 is a cylindrical threshing tooth 7a. The threshing teeth 7a on adjacent threshing tooth rods 6a are spaced from each other in the axial direction of the drum to enhance the threshing effect.

[0047] All the threshing teeth 7a in the working area W have the same size, as Figure 3As shown in FIG. 1 , the tilt angles of the toggle teeth 7a on the same drum relative to the drum axis 4a are the same, forming a radial structure. The distance from the end face of any toggle tooth 7a to the axis of the drum forms the rotation radius of the drum. When the drum rotates, the end faces of all the toggle teeth 7a together form a cylindrical surface. In this embodiment, Figure 3 As shown, the height of the lowest point of the cylindrical surface of the second roller 3a from the horizontal plane is greater than the height of the lowest point of the cylindrical surface of the first roller 2a from the horizontal plane. Furthermore, the rotation radius of the second roller 3a is smaller than the rotation radius of the first roller 2a, and the height of the roller shaft 4a of the second roller 3a is higher than the height of the roller shaft 4a of the first roller 2a, and the highest points of the rotating cylindrical surfaces of the second roller 3a and the first roller 2a are at the same horizontal height. This structural design increases the distance between the rear contacting roller and the horizontal vibrating screen below, so that the debris falling from the rear contacting roller to the vibrating screen can be fully screened by wind.

[0048] In the path of crops, such as Figure 4 and Figure 5 As shown, the first roller 2a and the second roller 3a are respectively provided with an anti-entanglement ring 9a at the transfer end, that is, Figure 1 As shown, the first roller 2a is fixed to one end of the roller shaft 4a of the right frame 1 and an anti-winding ring 9a is provided, and the second roller 3a is fixed to one end of the roller shaft 4a of the right frame 1 and an anti-winding ring 9a is provided to prevent crop straw from being entangled on the roller shaft 4a and hindering crop transportation.

[0049] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A double drum structure for a combine harvester, characterized in that: include: Rack (1); Two rollers are mounted on the frame (1), with their axes being parallel to each other and spaced apart in the crop conveying direction; A plurality of toggle members are arranged on any of the rollers at intervals along the axial direction of the roller; a working area (W) is formed between two toggle members located at two ends of the roller; The working areas (W) of the two rollers have the same width; All the toggle members have the same size; the distance from the end surface of any toggle member to the axis of the roller forms the rotation radius of the roller; The height of the lowest point of the cylindrical surface formed by the rotation of the roller that contacts the crop later from the horizontal plane is greater than the height of the lowest point of the cylindrical surface formed by the rotation of the roller that contacts the crop earlier from the horizontal plane; The highest point of the cylindrical surface formed by the rotation of the roller that contacts the crop later and the highest point of the cylindrical surface formed by the rotation of the roller that contacts the crop earlier are at the same level; The rotation radius of the roller that contacts the crop later is smaller than the rotation radius of the roller that contacts the crop earlier; Any of the drums also includes: Roller shaft (4a); A plurality of webs (5a) are coaxially and spaced apart on the drum shaft (4a); a plurality of mounting portions are spaced apart on the outer circumference of any web (5a); A plurality of threshing tooth rods (6a) are arranged across all the webs (5a) and fixed on the mounting portion; a plurality of shifting members are arranged at intervals on any of the threshing tooth rods (6a); The drum also includes: A connecting plate (8a), one end of which is welded and fixed to the threshing tooth rod (6a), and the other end of which is detachably fixed to the mounting portion; Any of the mounting parts comprises: A plurality of groups of adjustment holes (51a); the connecting plate (8a) is suitable for being fixed on any group of the adjustment holes (51a) to adjust the swing angle of the toggle member relative to the web (5a).

2. The double drum structure of a combine harvester according to claim 1, characterized in that: Any of the installation parts further includes: The limiting groove (52a) has a groove shape matching the threshing tooth rod (6a) and is suitable for the threshing tooth rod (6a) to be embedded.

3. The double drum structure of the combine harvester according to claim 2, characterized in that: The toggle member is a cylindrical toggle tooth (7a).

4. The double drum structure of the combine harvester according to claim 3, characterized in that: The shifting teeth (7a) on adjacent threshing tooth rods (6a) are arranged at intervals from each other in the axial direction of the drum.

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