A vibration-reducing and noise-reducing header conveying trough device for a combine harvester

Abstract

The present invention provides a vibration-damping and noise-reducing header conveyor trough device for a combine harvester, comprising a chain transmission system and a conveyor angle iron, wherein the conveyor angle iron is installed on the chain of the chain transmission system; the conveyor angle iron comprises a base layer, a damping layer and a constraint layer, wherein the base layer is fixed on the chain, a damping layer is provided on the base layer, and the damping layer is installed with the base layer through the constraint layer. The surface of the damping layer in contact with the constraint layer is provided with a raised irregular texture, and the raised irregular texture is brought into contact with the constraint layer through the constraint layer, so as to reduce the vibration generated by the base layer during the operation of the chain transmission system. The present invention can achieve vibration reduction and noise reduction, and extend the service life of the conveyor trough of the combine harvester, and the present invention has a simple structure and high reliability.

Description

Technical Field

[0001] The invention relates to the field of combine harvesters or agricultural machinery, and in particular to a vibration-reducing and noise-reducing header conveying trough device for a combine harvester. Background Art

[0002] With the rapid development of society, the planting industry has also developed rapidly. Combine harvesters are widely used in various types of grain harvesting, which improves the efficiency of crop harvesting and saves manpower. However, a lot of noise will be generated during the application of combine harvesters, which seriously affects the reliability of the whole machine and the working environment of the driver. The header is a key component of the combine harvester harvesting. The conveyor trough is the "throat" connecting the header and threshing device of the longitudinal flow combine harvester. It is an important component for smoothly feeding crops into the threshing drum. It is also a key structure that restricts the threshing and separation ability of the threshing drum. The researchers used the sound intensity method and the separate operation method, and determined through the analysis of the sound intensity cloud map that the contribution of the conveyor trough to the noise around the driver's ears is 26.9%. Therefore, it is of great significance to improve the working environment of the operators and improve work efficiency by completing the vibration reduction and noise reduction of the conveyor trough part through a practical measure.

[0003] At present, there are few inventions in the field of vibration reduction and noise reduction of the conveyor trough device of the combine harvester. Among the existing conveyor trough devices, a Chinese invention patent discloses a conveyor trough of the combine harvester with the functions of forward conveying and reverse grass withdrawal. The power between the power output shaft of the threshing drum of the combine harvester and the power input shaft of the conveyor trough is cut off and connected through a set of tensioning wheel mechanism, which can quickly solve the problem of grass blocking inside the conveyor trough; a Chinese invention patent discloses a grass returning mechanism of the conveyor trough of a full-feed combine harvester, which can bring out the crops blocked in the conveyor trough and realize the normal operation of the combine harvester; the Chinese invention patent provides a damping and vibration reduction plate with damping and vibration reduction characteristics and is not easy to plastically deform.

[0004] However, the above-mentioned combine harvester conveyor trough device only optimized the overall structure of the conveyor trough for the problem of grass blocking, and did not study the vibration and noise problems of the conveyor trough. The optimized structure has aggravated the vibration and noise problems of the conveyor trough due to its high energy consumption and high power. Therefore, the current conveyor trough device still has problems such as severe vibration of the cutter table, loud noise, and easy wear caused by the collision of the conveying angle iron with the bottom plate during operation; and most of the existing damping vibration reduction plates have defects such as the vibration reduction structure is easily invaded by water stains and debris from the stems, resulting in a loose structure and a short service life. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a vibration-reducing and noise-reducing header conveyor trough device for a combine harvester, which can achieve vibration reduction and noise reduction and extend the service life of the conveyor trough of the combine harvester. The present invention has a simple structure and high reliability and can be directly used for most grain combine harvesters on the market.

[0006] The present invention achieves the above technical objectives through the following technical means.

[0007] A vibration-damping and noise-reducing cutting table conveying trough device for a combine harvester comprises a chain transmission system and a conveying angle iron, wherein the conveying angle iron is installed on the chain of the chain transmission system; the conveying angle iron comprises a base layer, a damping layer and a constraint layer, wherein the base layer is fixed on the chain, a damping layer is provided on the base layer, and the damping layer is installed with the base layer through the constraint layer.

[0008] Furthermore, the surface of the damping layer in contact with the constraint layer is provided with a raised irregular texture, and the raised irregular texture is in contact with the constraint layer through the constraint layer, so as to reduce the vibration of the base layer generated during the operation of the chain transmission system.

[0009] Furthermore, the irregular texture of the protrusion is one or a combination of cylinder, boss, and sawtooth.

[0010] Furthermore, the base layer is a right-angle iron; the damping layer includes a vertical section damping layer and a horizontal section damping layer, the vertical section damping layer is installed on one side of the right-angle iron perpendicular to the chain movement direction, and the horizontal section damping layer is installed on the other side of the right-angle iron parallel to the chain movement direction, the surface of the vertical section damping layer is provided with a serrated texture; the surface of the horizontal section damping layer is provided with a trapezoidal boss texture.

[0011] Furthermore, the sawtooth texture has oblique sawtooth, and the inclination angle of the oblique sawtooth is 55°-60°; the thickness of the vertical damping layer at the minimum point is 1 / 4-1 / 3 of the thickness of the base layer.

[0012] Furthermore, the thickness of the damping layer in the horizontal section at the minimum point is 25%-35% of the thickness of the base layer; the trapezoidal boss texture is an isosceles trapezoidal texture, and the bottom angle of the isosceles trapezoidal texture is 55°-60°.

[0013] Furthermore, the surface of the constraining layer in contact with the raised irregular texture is provided with a recessed irregular texture matching the raised irregular texture.

[0014] Furthermore, it also includes a frame, which is located outside the header conveyor trough device; the frame includes an outer shell, a glass fiber layer and a carbon fiber layer; the carbon fiber layer is wrapped with a glass fiber layer, and the glass fiber layer is wrapped with the outer shell; the glass fiber layer accounts for 20%-30% of the thickness of the frame; the carbon fiber layer accounts for 30%-50% of the thickness of the frame.

[0015] The beneficial effects of the present invention are:

[0016] 1. The vibration-reducing and noise-reducing header conveying trough device for a combine harvester described in the present invention reduces the vibration of the header conveying trough device by providing a damping layer in the conveying angle iron.

[0017] 2. The vibration-reducing and noise-reducing harvester header conveyor trough device described in the present invention has a raised irregular texture on the surface of the damping layer in contact with the constraint layer, thereby increasing gas elastic damping between the constraint layer and the damping layer, and achieving a more obvious anti-seismic effect.

[0018] 3. The vibration-damping and noise-reducing harvester header conveyor trough device of the present invention utilizes a constraint layer to wrap the damping layer, thereby overcoming the shortcomings of the traditional damping and vibration-damping structure that the layers are easily debonded and loose, ensuring the stability of the conveyor trough operation and extending the service life of the conveying angle iron.

[0019] 4. The vibration-damping and noise-reducing header conveyor trough device for a combine harvester described in the present invention has an outer shell, a glass fiber layer and a carbon fiber layer, so that the frame has excellent damping performance to achieve vibration damping and noise reduction, while making the conveyor trough device light in weight, high in strength and not easy to wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the general assembly drawing of the vibration-reducing and noise-reducing header conveying trough device for a combine harvester according to the present invention.

[0021] Figure 2 This is a cross-sectional view of the frame described in the present invention.

[0022] Figure 3 This is a diagram showing the installation position of the conveying angle iron described in the present invention.

[0023] Figure 4 This is a cross-sectional view of the conveying angle iron described in the present invention.

[0024] In the figure:

[0025] 1-driving shaft; 2-driving sprocket; 3-conveying angle iron; 301-base layer; 302-damping layer; 303-constraint layer; 304-pin; 4-frame; 401-housing; 402-glass fiber layer; 403-carbon fiber layer; 5-driven sprocket; 6-driven shaft; 7-chain. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0027] like Figure 1As shown, the vibration-reducing and noise-reducing header conveying trough device for a combine harvester of the present invention comprises a chain transmission system and a conveying angle iron 3, wherein the chain transmission system comprises a driving shaft 1, a driving sprocket 2, a frame 4, a driven sprocket 5 and a driven shaft 6; the driving sprocket 2 is mounted on the driving shaft 1, the driven sprocket 5 is mounted on the driven shaft 6, and the driving sprocket 2 and the driven sprocket 5 are driven by a chain 7. The conveying angle iron 3 is mounted on the chain 7 of the chain transmission system; the conveying angle iron 3 comprises a base layer 301, a damping layer 302 and a constraint layer 303, wherein the base layer 301 is fixed on the chain 7, the damping layer 302 is arranged on the base layer 301, and the damping layer 302 is mounted with the base layer 301 by the constraint layer 303.

[0028] like Figure 2 As shown, the frame 4 includes an outer shell 401, a glass fiber layer 402 and a carbon fiber layer 403; the carbon fiber layer 403 is wrapped with the glass fiber layer 402, and the glass fiber layer 402 is wrapped with the outer shell 401; the outer shell 401 is the outermost layer, and the material is Q235, the glass fiber layer 402 accounts for 20%-30% of the thickness of the frame 4, and is used to make the frame have a sufficiently good damping performance to reduce vibration and noise; the carbon fiber layer 403 accounts for 30%-50% of the thickness of the frame 4, and is used to improve the overall mechanical properties of the frame. Through the outer shell 401, the glass fiber layer 402 and the carbon fiber layer 403, the frame has excellent damping performance to achieve damping vibration and noise reduction, and at the same time, the conveying trough device is light in weight, high in strength, and not easy to wear.

[0029] like Figure 3 and Figure 4 As shown, the surface of the damping layer 302 in contact with the constraint layer 303 is provided with a raised irregular texture, and the raised irregular texture is in contact with the constraint layer 303 through the constraint layer 303, so as to reduce the vibration of the base layer 301 during the operation of the chain transmission system. The raised irregular texture is one or a combination of a cylinder, a boss, and a sawtooth. By providing the surface of the damping layer 302 in contact with the constraint layer 303 with a raised irregular texture, gas elastic damping is added between the constraint layer 303 and the damping layer 302, and the anti-seismic effect is more obvious.

[0030] Figure 4This is a specific embodiment of the present invention, wherein the base layer 301 is a right angle iron; a damping layer 302 is provided on the inner side of the right angle iron for damping vibration and reducing noise; a constraint layer 303 is wrapped around the outside of the damping layer 302, and the right angle iron, the damping layer 302 and the constraint layer 303 are fixed by pins 304, so that while achieving the functions of vibration reduction and noise reduction, water stains on stems, grain debris, etc. are prevented from entering the gap between the right angle iron and the damping layer 302, thereby extending the service life of the components; the damping layer 302 includes a vertical section damping layer and a horizontal section damping layer, the vertical section damping layer is installed on one side of the right angle iron perpendicular to the movement direction of the chain 7, and the horizontal section damping layer is installed on the other side of the right angle iron parallel to the movement direction of the chain 7, and the surface of the vertical section damping layer is provided with a serrated texture; the surface of the horizontal section damping layer is provided with a trapezoidal boss texture. The sawtooth texture has oblique sawtooth, and the inclination angle of the oblique sawtooth is 55°-60°; the thickness of the vertical damping layer at the minimum is 1 / 4-1 / 3 of the thickness of the base layer 301. The thickness of the horizontal damping layer at the minimum is 25%-35% of the thickness of the base layer 301; the trapezoidal boss texture is an isosceles trapezoidal texture, and the base angle of the isosceles trapezoidal texture is 55°-60°.

[0031] The surface of the constraint layer 303 in contact with the raised irregular texture is provided with a concave irregular texture matching the raised irregular texture. Although the gas elastic damping between the constraint layer 303 and the damping layer 302 disappears in this way, the surface of the constraint layer 303 in contact with the raised irregular texture is provided with a concave irregular texture matching the raised irregular texture. Although the anti-seismic effect is reduced, it can prevent stem water stains, grain debris, etc. from entering the gap between the constraint layer 303 and the damping layer 302, thereby wearing the damping layer 302 under long-term vibration. In order to increase the anti-seismic performance of the damping layer 302, the damping layer 302 is a foamed damping layer with micropores, generally made of rubber. The constraint layer 303 is a light metal, generally an aluminum alloy.

[0032] The embodiments are preferred implementations of the present invention, but the present invention is not limited to the above-mentioned implementations. Any obvious improvements, substitutions or modifications that can be made by those skilled in the art without departing from the essential content of the present invention belong to the protection scope of the present invention.

Claims

1. A vibration and noise reduction header conveying trough device for a combine harvester, characterized in that: It comprises a chain transmission system and a conveying angle iron (3), wherein the conveying angle iron (3) is mounted on a chain (7) of the chain transmission system; the conveying angle iron (3) comprises a base layer (301), a damping layer (302) and a constraint layer (303), wherein the base layer (301) is fixed on the chain (7), the damping layer (302) is provided on the base layer (301), and the damping layer (302) is mounted on the base layer (301) via the constraint layer (303); The surface of the damping layer (302) in contact with the constraint layer (303) is provided with a raised irregular texture, and the raised irregular texture is brought into contact with the constraint layer (303) through the constraint layer (303), so as to reduce the vibration generated by the base layer (301) during operation of the chain transmission system; the base layer (301) is a right angle iron; the damping layer (302) comprises a vertical section damping layer and a horizontal section damping layer, the vertical section damping layer is installed on one side of the right angle iron perpendicular to the movement direction of the chain (7), and the horizontal section damping layer is installed on the other side of the right angle iron parallel to the movement direction of the chain (7), the surface of the vertical section damping layer is provided with a sawtooth texture; the surface of the horizontal section damping layer is provided with a trapezoidal boss texture; the surface of the constraint layer (303) in contact with the raised irregular texture is provided with a concave irregular texture matching the raised irregular texture.

2. The vibration-reducing and noise-reducing header conveying trough device for a combine harvester according to claim 1, characterized in that: The sawtooth texture has oblique sawtooth structures, and the inclination angle of the oblique sawtooth structures is 55°-60°; the thickness of the vertical damping layer at its smallest point is 1 / 4-1 / 3 of the thickness of the base layer (301).

3. The vibration and noise reduction header conveying trough device for a combine harvester according to claim 1, characterized in that: The thickness of the horizontal damping layer at its minimum point is 25%-35% of the thickness of the base layer (301); the trapezoidal boss texture is an isosceles trapezoidal texture, and the bottom angle of the isosceles trapezoidal texture is 55°-60°.

4. The vibration-reducing and noise-reducing header conveying trough device for a combine harvester according to any one of claims 1 to 3, characterized in that: It also comprises a frame (4), the frame (4) being located outside the header conveyor trough device; the frame (4) comprising an outer shell (401), a glass fiber layer (402) and a carbon fiber layer (403); the carbon fiber layer (403) is wrapped with the glass fiber layer (402), and the glass fiber layer (402) is wrapped with the outer shell (401); the glass fiber layer (402) accounts for 20%-30% of the thickness of the frame (4); and the carbon fiber layer (403) accounts for 30%-50% of the thickness of the frame (4).

Images