Cleaning system and combine harvester

Abstract

The utility model relates to the field of agricultural harvesting machinery, and discloses a cleaning system and a combine harvester, the cleaning system comprises a threshing cylinder, a cleaning sieve and a return device, the return device comprises a conveying belt and a driving assembly, the conveying belt is arranged between the threshing cylinder and the cleaning sieve and is inclined downwards from back to front, and the driving assembly is arranged on the conveying belt. The conveying belt is in driving connection with the driving assembly and can be driven by the driving assembly to rotate so as to convey the grain mixture from back to front. According to the cleaning system, the conveying belt rotates to return grain mixtures, and compared with the mode that the grain mixtures are returned through a return disc which swings back and forth through a rocker arm, noise is small, impact is small, conveying efficiency is high, the rocker arm does not need to be installed, a transmission mechanism can be designed to be simple, and the requirement for the inner space of a machine body is small; in addition, the returning device further comprises a tensioning assembly used for tensioning the conveying belt, so that the conveying belt can be kept tensioned, and the reliability of returning the grain mixture by the conveying belt is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of agricultural harvesting machinery, and concretely relates to a kind of cleaning system and combine harvester. BACKGROUND

[0002] In the existing combine harvester, a return device is arranged between the threshing cylinder and the cleaning screen, which mainly includes a return disc and a driving rocker. In the actual working process, the return disc will reciprocate along the front-back direction under the driving of the driving rocker to transport the grain mixture discharged from the rear end of the threshing cylinder to the front end of the cleaning screen, so as to achieve the purpose of reducing cleaning loss and improving cleaning effect. However, this kind of return device has the problems of large noise, large impact and low conveying efficiency, and the installation and movement position of the driving rocker need to be considered during actual installation, which requires a large internal space of the machine body and a more complex transmission structure. SUMMARY

[0003] In view of the above deficiencies or shortcomings in the prior art, the utility model provides a kind of cleaning system and combine harvester, to solve the technical problems that the return device in the existing combine harvester has large noise, large impact, low conveying efficiency, large demand for internal space of machine body and complex transmission structure.

[0004] To achieve the above purpose, the utility model provides a kind of cleaning system, the cleaning system includes:

[0005] The threshing cylinder is arranged along the front-back direction.

[0006] The cleaning screen is arranged along the front-back direction and is arranged directly below the threshing cylinder.

[0007] The return device includes a conveying belt, a driving assembly and a tensioning assembly. The conveying belt is arranged between the threshing cylinder and the cleaning screen and is inclined downward from back to front. The conveying belt is drivingly connected with the driving assembly and can rotate under the driving of the driving assembly to convey the grain mixture from back to front. The tensioning assembly is connected with the conveying belt to tension the conveying belt.

[0008] Optionally, the rear end of the conveying belt is vertically aligned with the rear end of the threshing cylinder.

[0009] Optionally, the driving assembly includes a driving roller, a driven roller and a rotary driving member. The driving roller and the driven roller are arranged along the front-back direction with a spacing, and the height of the driving roller is lower than that of the driven roller. The rotary driving member is drivingly connected with the driving roller, and the conveying belt is wound around the driving roller and the driven roller.

[0010] Optionally, the rotary driving member is a driving motor.

[0011] Optionally, the returning device further comprises:

[0012] a bearing seat arranged corresponding to the end of the driving roller;

[0013] a first bearing embedded in the bearing seat and coaxially arranged with the driving roller;

[0014] a first connecting shaft embedded into the first bearing at one end and keyed connected with the end of the driving roller at the other end;

[0015] wherein the output shaft of the rotary driving member is connected with the first connecting shaft through a shaft coupling.

[0016] Optionally, the first bearing is a bearing provided with an eccentric locking sleeve.

[0017] Optionally, the returning device further comprises:

[0018] a second bearing coaxially embedded in the end of the driven roller;

[0019] a second connecting shaft embedded into the second bearing at a first end;

[0020] the tensioning assembly comprises:

[0021] a tensioning cylinder fixedly sleeved on the second end of the second connecting shaft;

[0022] a tensioning screw fixedly connected with the tensioning cylinder at one end and extended away from the driving roller at the other end and threadedly connected with a fixed plate.

[0023] Optionally, a sealing plate is sleeved on the tensioning cylinder, and the sealing plate is located between the end of the driven roller and the tensioning screw.

[0024] Optionally, the driving roller and the driven roller are both rubber rollers with patterns protruding on the outer circumferential surface.

[0025] The utility model also provides a combine harvester, the combine harvester includes the above-mentioned cleaning system.

[0026] Through the above technical solution, in the cleaning system of the present invention, the return device includes a conveyor belt and a drive assembly. The conveyor belt is driven and connected to the drive assembly and can rotate under the drive of the drive assembly to transport the grain mixture from back to front. The cleaning system of the present invention adopts the rotation of the conveyor belt to return the grain mixture. Compared with the method of returning the grain mixture by reciprocating swinging of the return disc by a rocker arm, it has low noise, low impact and high conveying efficiency. There is no need to install a rocker arm, the transmission mechanism can be designed to be simpler, and the internal space requirement of the machine body is small. In addition, the return device also includes a tensioning assembly for tensioning the conveyor belt. Such a setting can keep the conveyor belt tensioned, ensuring the reliability of the conveyor belt returning the grain mixture.

[0027] Other features and advantages of the present invention will be described in detail in the subsequent specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 This is a schematic structural diagram of a cleaning system in one embodiment of the present utility model;

[0030] Figure 2 for Figure 1 A schematic structural diagram of the loopback device in FIG.

[0031] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0032] Figure 4 for Figure 2 A partial enlarged view of point B in the middle.

[0033] Description of reference numerals:

[0034] 1 threshing drum

[0035] 2 Cleaning screen

[0036] 3 loopback device

[0037] 31 conveyor belt 32 driving roller

[0038] 33 driven roller 34 bearing seat

[0039] 35 First connecting shaft 36 Second connecting shaft

[0040] 37 tensioning cylinder 38 tensioning screw

[0041] 39 Sealing plate DETAILED DESCRIPTION

[0042] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0043] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0044] In the present application, unless otherwise stated, the orientation words such as "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application; the orientation words "inner" and "outer" refer to the inner and outer of the contour of each component itself.

[0045] The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] The present application first provides a cleaning system.

[0047] In one embodiment, referring to the accompanying drawings, Figure 1 As shown in the drawings, the cleaning system comprises:

[0048] A threshing drum 1 is arranged in the front-rear direction;

[0049] A cleaning screen 2 is arranged in the front-rear direction and is arranged directly below the threshing drum 1;

[0050] A return device 3 comprises a conveying belt 31, a driving assembly and a tensioning assembly. The conveying belt 31 is arranged between the threshing drum 1 and the cleaning screen 2 and is arranged downwardly from rear to front. The conveying belt 31 is drivingly connected with the driving assembly and can rotate under the driving of the driving assembly to convey the grain mixture from rear to front. The tensioning assembly is connected with the conveying belt 31 to tension the conveying belt 31.

[0051] In the cleaning system of this embodiment, the return device 3 includes a conveyor belt 31 and a drive assembly. The conveyor belt 31 is driven and connected to the drive assembly and can rotate under the drive of the drive assembly to transport the grain mixture from back to front. The cleaning system of this embodiment adopts the rotation of the conveyor belt 31 to return the grain mixture. Compared with the method of returning the grain mixture by reciprocating swinging of the return disk by a rocker arm, it has low noise, low impact and high conveying efficiency. There is no need to install a rocker arm, the transmission mechanism can be designed to be simpler, and the internal space requirement of the machine body is small. In addition, the return device 3 also includes a tensioning assembly for tensioning the conveyor belt. Such a setting can keep the conveyor belt 31 tensioned, ensuring the reliability of the conveyor belt 31 in returning the grain mixture.

[0052] In one embodiment, referring to the attached Figure 1 Shown, the rear end of conveyer belt 31 is aligned in the vertical direction with the rear end of threshing drum 1. Such arrangement can ensure that the grain mixture falling off from the rear end of threshing drum 1 falls on conveyer belt 31 for the most part, reducing the cleaning loss.

[0053] In one embodiment, referring to the attached Figure 2 To the attached Figure 4 As shown, the driving assembly includes an active roller 32, a driven roller 33 and a rotating driving member. The active roller 32 and the driven roller 33 are arranged at intervals in the front-to-back direction, and the height of the active roller 32 is lower than that of the driven roller 33. The rotating driving member is connected to the active roller 32 for driving, and the conveyor belt 31 is wound around the active roller 32 and the driven roller 33.

[0054] It can be understood that by driving the active roller 32 to rotate through the rotary driving member, the conveyor belt 31 can be driven to rotate under the support of the active roller 32 and the driven roller 33 to achieve conveying.

[0055] In one embodiment, the rotary drive member is a drive motor. With such a design, the operating noise of the return device 3 can be further reduced due to the low operating noise of the drive motor.

[0056] Furthermore, the rotating drive member can be a servo motor. With such a configuration, the conveying speed of the conveyor belt 31 can be controlled by controlling the rotational speed of the rotating drive member. In actual application, the conveying speed of the conveyor belt 31 can be controlled according to actual conditions to improve the cleaning quality and avoid blockage. When the grain feed amount is small, the conveying speed of the conveyor belt 31 can be reduced, which also has the effect of saving energy.

[0057] In one embodiment, referring to the attached Figure 2 and attached Figure 3 As shown, the loopback device 3 also includes:

[0058] The bearing seat 34 is arranged corresponding to the end of the driving roller 32;

[0059] The first bearing is embedded in the bearing seat 34 and coaxially arranged with the driving roller 32.

[0060] The first connecting shaft 35 is embedded into the first bearing at one end and is keyed connected with the end of the driving roller 32 at the other end.

[0061] The output shaft of the rotary driving member is connected with the first connecting shaft 35 through the shaft coupling.

[0062] In the embodiment, the rotary driving member can drive the driving roller 32 to rotate through the shaft coupling and the first connecting shaft 35, and the transmission structure is relatively simple and the transmission route is short, so that the installation difficulty of the return device 3 is effectively reduced and more space is not occupied.

[0063] Specifically, the two ends of the driving roller 32 are respectively provided with the corresponding bearing seat 34, the first bearing and the first connecting shaft 35. In actual application, the bearing seat 34 is fastened and connected to the wall of the combine harvester through bolts, so as to support the driving roller 32 in the body of the combine harvester, and the rotary driving member can be installed outside the body of the combine harvester through the mounting bracket, and the first connecting shaft 35 penetrates the wall of the combine harvester and is connected with the rotary driving member.

[0064] In one embodiment, the first bearing is a bearing provided with an eccentric locking sleeve. In this way, the first bearing has good rigidity and rotation accuracy.

[0065] In one embodiment, referring to Figs. 1 to 3, Figure 2 and Figs. 4 to 6, Figure 4 the return device 3 further comprises:

[0066] The second bearing is coaxially embedded in the end of the driven roller 33.

[0067] The second connecting shaft 36 is embedded into the second bearing at the first end.

[0068] The tensioning assembly comprises:

[0069] The tensioning cylinder 37 is fixedly sleeved on the second end of the second connecting shaft 36.

[0070] The tensioning screw 38 is fixedly connected with the tensioning cylinder 37 at one end and extends away from the driving roller 32 at the other end and is threadedly connected with a fixed plate.

[0071] It can be understood that the fixed plate is fixedly arranged, and the tensioning cylinder 37 is moved away from the driving roller 32 by rotating the tensioning screw 38 to drive the tensioning cylinder 37 to move away from the driving roller 32, so as to realize the tensioning adjustment of the conveying belt 31.

[0072] Specifically, the tensioning cylinder 37 is fixedly connected with the second end of the second connecting shaft 36 through the bayonet joint.

[0073] Specifically, one end of the tensioning screw 38 is fixedly connected with the tensioning cylinder 37 by means of nut locking, and the other end is threadedly connected with the nuts arranged on the two sides of the fixed plate.

[0074] Specifically, the driven roller 33 is provided with corresponding second bearings, second connecting shafts 36, tensioning cylinders 37 and tensioning screws 38 at two ends thereof, and the second connecting shafts 36 penetrate through the machine wall of the combine harvester in actual application, and the fixed plate is fixedly connected to the outside of the machine body of the combine harvester.

[0075] In one embodiment, referring to the accompanying drawings Figure 4 As shown, the sealing plate 39 is sleeved on the tensioning cylinder 37, and the sealing plate 39 is located between the end of the driven roller 33 and the tensioning screw 38.

[0076] It can be understood that the sealing plate 39 can seal the groove hole of the machine wall of the combine harvester for sliding of the second connecting shaft 36, so as to prevent grain leakage.

[0077] In one embodiment, the driving roller 32 and the driven roller 33 are both rubber rollers with patterns protruding on the outer circumferential surfaces. In this way, the friction between the driving roller 32 and the driven roller 33 and the conveying belt 31 is effectively improved, and slippage of the conveying belt 31 is avoided.

[0078] Specifically, the driving roller 32 and the driven roller 33 each include a roller body composed of a seamless steel pipe and rubber coated on the outer circumferential surface of the roller body.

[0079] The utility model also provides a combine harvester, the combine harvester includes the cleaning system as described above. The specific structure of the cleaning system refers to the above-mentioned embodiments, since the combine harvester adopts all the technical schemes of the above-mentioned embodiments, at least has all the beneficial effects brought by the technical schemes of the above-mentioned embodiments, which will not be repeated here.

[0080] In the description of the utility model, it is understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In the description of the utility model, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0081] In the utility model, unless another definite provision and limit, the term " install " " link " " connect " " fixed " and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection or each other can communicate;Can be direct link, also can pass through intermediate medium indirectly link, can be two element inside's intercommunication or two element's interaction relation, unless another definite limit.For the ordinary skill of the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0082] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Furthermore, the skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0083] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the ordinary skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A cleaning system, characterized in that: The cleaning system comprises: A threshing drum (1) is arranged in a front-to-rear direction; A cleaning screen (2) is arranged in a front-to-back direction and is disposed directly below the threshing drum (1); The return device (3) comprises a conveyor belt (31), a drive assembly and a tensioning assembly. The conveyor belt (31) is arranged between the threshing drum (1) and the cleaning screen (2) and is arranged to be tilted downward from the back to the front. The conveyor belt (31) is connected to the drive assembly and can be rotated under the drive of the drive assembly to convey the grain mixture from the back to the front. The tensioning assembly is connected to the conveyor belt (31) for tensioning the conveyor belt (31).

2. The cleaning system according to claim 1, characterized in that: The rear end of the conveyor belt (31) is aligned with the rear end of the threshing drum (1) in the vertical direction.

3. The cleaning system according to claim 1, characterized in that: The driving assembly comprises an active roller (32), a driven roller (33) and a rotating driving member. The active roller (32) and the driven roller (33) are arranged at intervals along the front-to-back direction, and the height of the active roller (32) is lower than that of the driven roller (33). The rotating driving member is drivingly connected to the active roller (32). The conveyor belt (31) is wound around the active roller (32) and the driven roller (33).

4. The cleaning system according to claim 3, characterized in that: The rotating driving member is a driving motor.

5. The cleaning system according to claim 3, characterized in that: The return device (3) further comprises: A bearing seat (34) is arranged corresponding to the end of the active roller (32); A first bearing is embedded in the bearing seat (34) and is coaxially arranged with the active roller (32); A first connecting shaft (35), one end of which is embedded in the first bearing and the other end of which is key-connected to the end of the active roller (32); Wherein, the output shaft of the rotary drive member is connected to the first connecting shaft (35) via a coupling.

6. The cleaning system according to claim 5, characterized in that: The first bearing is a bearing provided with an eccentric locking sleeve.

7. The cleaning system according to claim 3, characterized in that: The return device (3) further comprises: A second bearing is coaxially embedded in the end of the driven roller (33); A second connecting shaft (36), a first end of which is embedded in the second bearing; The tensioning assembly comprises: A tensioning cylinder (37) fixedly sleeved on the second end of the second connecting shaft (36); One end of the tensioning screw (38) is fixedly connected to the tensioning cylinder (37), and the other end extends in a direction away from the active roller (32) and is threadedly connected to a fixing plate.

8. The cleaning system according to claim 7, characterized in that: A sealing plate (39) is sleeved on the tensioning cylinder (37), and the sealing plate (39) is located between the end of the driven roller (33) and the tensioning screw (38).

9. The cleaning system according to claim 3, characterized in that: The active roller (32) and the driven roller (33) are both rubber rollers with convex patterns on their outer circumferences.

10. A combine harvester, characterized in that: The combine harvester comprises a cleaning system according to any one of claims 1 to 9.

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