Threshing cylinder and corn harvester

Abstract

According to the threshing device and the corn harvester, the mandrel is contained in the inner cavity of the barrel in the rotatable mode, the first heat dissipation air channel is formed between the mandrel and the inner wall of the barrel, and the air inlet communicated with the first heat dissipation air channel is formed in the mandrel; and meanwhile, the threshing seat positioned on the outer surface of the cylinder body is provided with an air outlet communicated with the first heat dissipation air duct. When the mandrel rotates, the first fan installed on the mandrel is driven to rotate, the first fan can suck external air into the first heat dissipation air channel from the air inlet, and then the external air flows out from the air outlet of the threshing base. And external air can dissipate heat of the cylinder body and the threshing seat, so that the problems of overhigh temperature and rot of corns caused by overheat of the threshing cylinder can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to a threshing drum and a corn harvester. Background Art

[0002] The corn harvesters currently sold on the market basically do not thresh the corn when harvesting it. It is necessary to use a special corn thresher to thresh the corn after harvesting, which is time-consuming and labor-intensive.

[0003] Therefore, corn harvesters that can thresh corn when harvesting are the main research direction of technicians. At present, corn harvesters that can thresh corn when harvesting have appeared on the market, but it has been found through use that corn harvesters that thresh corn directly when harvesting have the problem that corn kernels heat up and are easy to rot after threshing. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problem that corns are heated and easily corrupted when the existing corn harvester threshes the corns.

[0005] In order to solve the above problems, the present invention provides a threshing drum, comprising:

[0006] The cylinder body can be driven to drive a plurality of threshing seats arranged on the outer surface of the cylinder body to rotate, and the cylinder body has an axially extending inner cavity, and the threshing seats are provided with air outlets;

[0007] A spindle is rotatably accommodated in the inner cavity, an air inlet is provided on the spindle and a first heat dissipation duct is formed between the spindle and the inner wall of the cylinder, and the first heat dissipation duct is connected with the air outlet and the air inlet;

[0008] The first fan is contained in the inner cavity and mounted on the spindle, so as to draw external air into the first heat dissipation duct through the air inlet to dissipate heat to the cylinder and the threshing seat, and then the air flows out from the air outlet.

[0009] Optionally, a second heat dissipation duct is provided in the threshing seat, and the second heat dissipation duct is connected to the air outlet.

[0010] Optionally, the threshing seat includes a mounting seat and a threshing body, and the mounting seat is integrally formed with the cylinder; the threshing body is sleeved outside the mounting seat and fixedly connected to the mounting seat through a connecting piece, and the air outlet passes through the mounting seat and the side wall of the threshing body.

[0011] Optionally, the spindle includes a first part and a second part, the air inlet is formed in the first part and extends axially, and the second part is a solid structure; the fan is installed at the junction of the first part and the second part, and the ratio of the length of the first part to the total length of the spindle is greater than 0 and less than or equal to 1 / 2.

[0012] Optionally, it also includes a first end cover and a second end cover, the inner cavity has a first end and a second end opposite to the first end in the axial direction, the first end cover and the cylinder are integrally formed and block the first end of the inner cavity, and the second end cover is detachably connected to the cylinder to block the second end of the inner cavity; and the core shaft passes through and is installed on the first end cover and the second end cover.

[0013] Optionally, the plurality of threshing bodies are located at different positions in the axial direction and radial direction of the cylinder.

[0014] Optionally, the threshing drum includes any one of the above items; and further includes:

[0015] A motor is used to drive the spindle and the barrel to rotate simultaneously, and the rotation speed of the spindle is different from the rotation speed of the barrel.

[0016] Optionally, a driving part is provided on the cylinder, and the driving part is arranged at the end of the cylinder, and the diameter of the driving part is smaller than the diameter of the cylinder; the corn harvester also includes a first belt and a second belt, the first belt is connected to the driving part, and the second belt is connected to the central shaft, and the diameters of the driving part and the central shaft are different.

[0017] Optionally, the threshing drum comprises any one of the above items; and further comprises:

[0018] a thermoelectric conversion device connected to the threshing drum of the corn harvester and used for cooling the external air, wherein the first fan is used for sucking the cooled external air into the first heat dissipation channel through the air inlet;

[0019] An air pump is connected to the thermoelectric conversion device and is used to pump the external gas into the thermoelectric conversion device.

[0020] Optionally, the thermoelectric conversion device includes a housing and a Peltier semiconductor, a heat sink and a second fan accommodated in the housing;

[0021] An air inlet and an air outlet are provided on the shell, a refrigeration cavity is formed between the cold end of the Peltier semiconductor and the bottom of the shell, and the refrigeration cavity is connected with the air inlet and the air outlet;

[0022] The heat sink is installed at the hot end of the Peltier semiconductor, a second fan is installed on the heat sink, and a heat dissipation port is provided on the top of the housing, and the heat dissipation port faces the second fan;

[0023] The air pump pumps the external air into the refrigeration chamber through the air inlet, and pumps the external air out through the air outlet after being cooled by the Peltier semiconductor; the second fan discharges the heat generated by the semiconductor hot end out of the thermoelectric conversion device through the air outlet.

[0024] In the threshing drum of the present invention, the mandrel is rotatably accommodated in the inner cavity of the cylinder, and a first heat dissipation duct is formed between the mandrel and the inner wall of the cylinder, and an air inlet connected to the first heat dissipation duct is provided on the mandrel, and an air outlet connected to the first heat dissipation duct is provided on the threshing seat located on the outer surface of the cylinder. When the mandrel rotates, it drives the first fan installed thereon to rotate, and the first fan can suck external air from the air inlet into the first heat dissipation duct, and then flows out from the air outlet of the threshing seat. In this way, the external air can not only dissipate heat for the cylinder, but also dissipate heat for the threshing seat, thereby avoiding the problem of overheating of the threshing drum, which causes the corn temperature to be too high and rotten. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of a threshing drum in one embodiment of the present invention from a first viewing angle;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the threshing drum in one embodiment of the present invention from a second viewing angle;

[0027] Figure 3 is a schematic cross-sectional structure diagram of a threshing drum in one embodiment of the present invention;

[0028] Figure 4 It is a partial cross-sectional structural schematic diagram of a threshing drum in one embodiment of the present invention;

[0029] Figure 5 yes Figure 3 and Figure 4 A schematic diagram of the partially enlarged structure of part A;

[0030] Figure 6 yes Figure 3 and Figure 4 A schematic diagram of the local enlarged structure of part B;

[0031] Figure 7 a~ Figure 7 b is a schematic diagram of the structure of a threshing body in a threshing drum according to an embodiment of the present invention;

[0032] Figure 8 is a schematic cross-sectional structure diagram of a corn harvester in one embodiment of the present invention;

[0033] Fig. 9 is a schematic diagram of a module of a corn harvester in another embodiment of the present invention;

[0034] Fig.10 is a schematic structural diagram of a thermoelectric conversion device in a corn harvester in another embodiment of the present invention;

[0035] Fig.11 yes Fig.10 A first cross-sectional structural schematic diagram of;

[0036] Fig.12 yes Fig.10 A second cross-sectional structural schematic diagram of ;

[0037] Fig.13 is a schematic structural diagram of an operation panel in a corn harvester in one embodiment of the present invention;

[0038] Fig.14 is a schematic structural diagram of an operation panel in a corn harvester in another embodiment of the present invention;

[0039] Fig.15 It is a structural schematic diagram of an operating panel in a corn harvester in another embodiment of the present invention.

[0040] Reference numerals

[0041] 100-threshing drum; 10-drum body; 11-first end cover; 111-reinforcement rib;

[0042] 12- second end cover; 13- driving part;

[0043] 10A-inner cavity; 10B-first heat dissipation duct; 10C-second opening;

[0044] 20-threshing seat; 21-mounting seat; 22-threshing body;

[0045] 221-top; 2211 mounting hole; 2212; threshing trough;

[0046] 222-threshing part; 222A-receiving layer; 23-connecting member;

[0047] 20A-air outlet; 20B-second heat dissipation duct;

[0048] 30- spindle; 31- first part; 32- second part;

[0049] 30A-air inlet; 30B-first opening;

[0050] 40-bearing assembly; 41-first bearing; 42-second bearing;

[0051] 50-first fan;

[0052] 60-motor;

[0053] 70-belt; 71-first belt; 72-second belt;

[0054] 200-thermoelectric conversion device; 201-housing; 202-air inlet; 203-air outlet;

[0055] 204-metal partition; 205-Peltier semiconductor; 206-heat sink;

[0056] 207-second fan; 200A-first cavity; 200B-second cavity;

[0057] 200C-heat dissipation port;

[0058] 300-air pump;

[0059] 400-operation panel; 401-first button; 402-indicator light;

[0060] 403-display area; 404-second button. DETAILED DESCRIPTION

[0061] The threshing drum and corn harvester proposed by the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will become clearer. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In addition, the structure shown in the accompanying drawings is often a part of the actual structure. In particular, the emphasis that each drawing needs to show is different, and sometimes different proportions are used.

[0062] Corn harvester is an agricultural machine that is used to harvest corn when it is ripe or close to ripe according to agronomic requirements. It is a new type of agricultural machinery developed for the development of new energy and to reduce the labor intensity of farmers. It shortens the labor cycle of farmers and frees them from heavy physical labor.

[0063] An existing corn harvester harvests the entire corn cob during corn harvesting, and then uses a corn thresher to thresh it. There is also a combined corn harvester that can directly thresh corn kernels during corn harvesting. An important component of this combined corn harvester is the threshing drum. During threshing, the threshing drum rotates to drive the threshing seat on the threshing drum to rotate, and then the corn kernels are peeled off the corn cobs through the rotating threshing seat. Since the threshing drum and the threshing seat thereon rub against the corn kernels and cause heat, and the newly harvested corn still contains a relatively large amount of water, when the temperature of the threshing drum and the threshing seat is too high, the corn kernels will overheat and rot. For this reason, dissipating the heat of the threshing drum during the threshing process is an important research direction for technicians.

[0064] like Figure 1 As shown, a threshing drum 100 of this embodiment includes: a drum body 10, which can be driven to drive a plurality of threshing seats 20 arranged on the outer surface of the drum body 10 to rotate. Figure 4 As shown, the cylinder 10 has an inner cavity 10A extending axially, and the threshing seat 20 is provided with an air outlet 20A.

[0065] The spindle 30 can be rotatably accommodated in the inner cavity 10A, wherein a first heat dissipation duct 10B connected to the air outlet 20A is formed between the spindle 30 and the inner wall of the cylinder 10, and the spindle 30 also has an air inlet 30A connected to the first heat dissipation duct 10B.

[0066] Continue to participate Figure 4 Combined with Figure 5 As shown, the threshing drum 100 of this embodiment also includes a first fan 50, which is accommodated in the inner cavity 10A and installed on the core shaft 30, so as to draw external air into the first heat dissipation duct 10B through the air inlet 30A to dissipate heat to the cylinder body 10 and the threshing seat 20, and then flows out from the air outlet 20A.

[0067] In this embodiment, the mandrel 30 is rotatably accommodated in the inner cavity 10A of the cylinder 10, and the first heat dissipation duct 10B is formed between the mandrel 30 and the inner wall of the cylinder 10, and an air inlet 30A connected to the first heat dissipation duct 10B is provided on the mandrel 30, and an air outlet 20A connected to the first heat dissipation duct 10A is provided on the threshing seat 20 located on the outer surface of the cylinder 10. In this way, when the mandrel 30 rotates, the first fan 50 installed thereon is driven to rotate, and the first fan 50 can suck the external air from the air inlet 30A into the first heat dissipation duct 10B, and then flow out from the air outlet 20A of the threshing seat 20. The external air can not only dissipate heat for the cylinder 10, but also dissipate heat for the threshing seat 20. In this way, the problem of corn temperature being too high and rotting caused by overheating of the threshing drum 100 can be avoided.

[0068] Further, see Figure 4 and Figure 5 , and combined with Figure 1 and Figure 2 As shown, the cylinder 10 further includes a first end cap 11 and a second end cap 12, and the inner cavity 10A has a first end and a second end opposite to the first end in the axial direction, wherein the first end cap 11 and the cylinder 10 are integrally formed and block the first end of the inner cavity 10A, and the second end cap 12 is detachably connected to the cylinder 10 to block the second end of the inner cavity 10A; and the mandrel 30 passes through and is installed on the first end cap 11 and the second end cap 12. In addition, a reinforcing rib 111 is provided on the first end cap 11 and / or the second end cap 12 to enhance the strength of the first end cap 11 and / or the second end cap 12.

[0069] Specifically, both the first end cover 11 and the second end cover 12 have through holes. When assembling the threshing drum 100 of the corn thresher of this embodiment, the mandrel 30 is first inserted into the inner cavity 10A and then passed through the through hole of the first end cover 11. After that, the fan 50 is installed on the mandrel 30, and finally the second end cover 12 is installed on the mandrel 30 and blocks the second end of the inner cavity 10A. In this embodiment, the first fan 50 is a suction fan. Preferably, the suction port of the first fan 50 is directly opposite to the air inlet 30A, and the line connecting the center of the suction port of the first fan 50 and the air inlet 30A overlaps with the axis of the mandrel 30. In addition, in this embodiment, the suction port of the fan 50 is larger than the air inlet 30A, so that the suction efficiency can be guaranteed.

[0070] In addition, the threshing drum 100 of the present embodiment further includes a bearing assembly 40, which includes a first bearing 41 and a second bearing 42, wherein the first bearing 41 is installed between the spindle 30 and the first end cover 11, and the second bearing 42 is installed between the spindle 30 and the second end cover 12. Among them, the first bearing 41 and the second bearing 42 are both ball bearings, so as to reduce the friction between the cylinder 10 and the spindle 30 and improve the life of the threshing drum 100. In addition, in the present embodiment, the materials forming the cylinder 10, the spindle 30 and the threshing seat 20 are all metals, preferably steel.

[0071] Further, continue to participate Figure 4 and Figure 5As shown, in this embodiment, the spindle 30 includes a first part 31 and a second part 32, the air inlet 30A is formed in the first part 31 and extends in the axial direction, the first opening 30B is formed on the side wall of the first part 31 and connects the air inlet 30A and the first heat dissipation duct 10A, and the second part 32 is a solid structure; the fan 50 is installed at the junction of the first part 31 and the second part 32, and the ratio of the length of the first part 31 to the total length of the spindle 30 is greater than 0 and less than or equal to 1 / 2. In this embodiment, since the air inlet 30A and the first opening 30B are both opened on the first part 31 and the ratio of the length of the first part 31 to the total length of the spindle 30 is greater than 0 and less than or equal to 1 / 2, that is, the air inlet 30A and the first opening 30B are both set at a position close to the first end of the inner cavity 10A, it can ensure that the external air enters the first heat dissipation duct 10B from a position close to the first end of the inner cavity 10A, so as to ensure the maximum heat dissipation of the cylinder 10. In addition, in this embodiment, in order to prevent impurities generated during the threshing process from entering the first heat dissipation duct 10 through the air inlet 30A, a first filter (not shown) is provided outside the air inlet 30A. The first filter (not shown) is a mesh structure with multiple small holes.

[0072] Furthermore, the plurality of threshing bodies 20 are located at different positions in the axial direction and radial direction of the cylinder 10. That is, the projections of the threshing bodies 20 on the surface perpendicular to the axial direction do not overlap, and the projections of the threshing bodies 20 on the surface parallel to the axial direction do not overlap. In this way, threshing can be carried out in all aspects to prevent leakage.

[0073] Ginseng Figure 6 As shown, the threshing seat 20 is provided with a second heat dissipation channel 20B, and the second heat dissipation channel 20B is connected to the air outlet 20A. Figure 6 As shown, the threshing seat 20 of the present embodiment includes a mounting seat 21 and a threshing body 22, and the second heat dissipation channel 20B is formed in the mounting seat 21. In addition, since the mounting seat 21 is a cubic hollow structure, the second heat dissipation channel 20B is the hollow cavity of the cube, and the mounting seat 21 and the cylinder 10 are integrally formed to improve the installation firmness of the mounting seat 21 and the cylinder 10. In addition, in the present embodiment, a second opening 10C is also provided on the side wall corresponding to the cylinder 10 and the mounting seat 20, and the second opening 10C communicates with the first heat dissipation channel 10B and the second heat dissipation channel 20B. In addition, in the present embodiment, since more impurities will be generated during the threshing process, in order to prevent impurities from entering the second heat dissipation channel 20B through the air outlet 20A and affecting the heat dissipation effect, in the present embodiment, a second filter screen (not shown) is also covered on the outside of the air outlet 20A, and the second filter screen (not shown) has a plurality of vents. In addition, the filter screen can be a metal filter screen or a nylon filter screen, which is not specifically limited.

[0074] Furthermore, the threshing body 22 is a structure having a hollow cavity that matches the shape of the mounting seat 21. In this embodiment, the threshing body 22 is sleeved outside the mounting seat 21 and is fixedly connected to the mounting seat 21 through a connecting piece 23, and the air outlet 20A penetrates the side wall of the mounting seat 21 and the threshing body 22. In this embodiment, the connecting piece 23 is a screw. In addition, the air outlet 20A is arranged at the intersection of the threshing seat 20 and the cylinder 10, so as to avoid the accumulation of impurities in the second heat dissipation duct 20A.

[0075] Further, combined with Figure 7 As shown in Figs. 7a and 7b, the top 221 of the threshing body 22 of this embodiment is provided with a mounting hole 2211. After the screw 23 passes through the mounting hole 2211, it is inserted into the screw hole on the top of the mounting seat 21, so that the threshing body 22 is installed on the mounting seat 21. In addition, as shown in the figure, the threshing body 22 also has a threshing portion 222, and the threshing portion 222 is located on the side wall of the threshing body 22. A plurality of threshing grooves 2212 parallel to and running through the top surface of the top 221 are also formed on the top 221 of the threshing body 22, and the threshing grooves 2212 extend toward the threshing seat 21, and the threshing portion 222 forms a comb-tooth structure, so that when threshing, not only can the corn kernels be acted on through the side of the threshing portion 222, but the comb-tooth structure can also act on the corn kernels to peel the corn kernels off the corn cob.

[0076] Further, continue to participate Figure 7 As shown in Figs. 7a and 7b, when the threshing part 222 is threshing, the corn kernels will generate a reaction force acting on the threshing part 222. When the reaction force acts on the threshing part 222 for many times, the threshing part 222 will be broken and fail. Especially in this embodiment, since the threshing part 222 is hollow, the thickness of the threshing part 222 will be relatively thin. When the threshing part 222 is damaged, the cracks generated from the damaged opening on the threshing part 222 will spread to the entire threshing body 22, causing the threshing body 22 to tear and disintegrate. Therefore, solving the problem of the rupture and failure of the threshing part 222 is the research direction of the technicians.

[0077] Continue to participate Figure 7 As shown in Figs. 7a and 7b, in this embodiment, the threshing part 222 includes a receiving layer 222A that receives the reaction force from the corn kernels, the receiving layer 222A has a first hardness, and the interior of the threshing part 222 has a second hardness, and the first hardness is greater than the second hardness. In this way, the surface area of ​​the threshing part 222 in contact with the corn kernels has a higher hardness, so the threshing part 222 can improve its wear resistance, and is not easily damaged when receiving the high stress generated by multiple actions of the corn kernels, so as to avoid the threshing body 22 from being torn.

[0078] In this embodiment, the depth of the receiving layer 222A is between 0.5 mm and 2.5 mm. In addition, in this embodiment, the first hardness is in the range of HRC 53 to HRC 62, and the second hardness is in the range of HRC 38 to HRC 45. The threshing body 22 is formed of medium carbon steel or chromium-nickel-molybdenum steel.

[0079] In addition, in this embodiment, the air outlet 20A is formed on the threshing part 222, in order to prevent impurities from entering the second heat dissipation duct 20B through the air outlet 20A and to prevent the wind blown out from the air outlet 20A from further affecting the corn. In an optional embodiment, the air outlet 20A can be set on the side wall of the threshing body 22 opposite to the threshing part 222.

[0080] Further, in the present embodiment, the receiving layer 222A having the first hardness can be prepared by a high frequency or induction hardening process. Specifically, in the process of preparing the threshing body 222, heat treatment can be performed after the steel material forms the basic shape of the threshing body 222. Heat treatment includes annealing, hot forging and normalizing the steel material. The steel material can be annealed to remove stress and toughen the material. Annealing can include heating the steel material to a temperature higher than the material for a period of time, and then air cooling the steel. After the heat treatment, a low temperature operation can be performed to cool the formed threshing body 222 to a very low temperature, such as minus 185 degrees Celsius, to harden the threshing body 222 to increase the amount of martensite in the crystal structure of the threshing body 222.

[0081] Finally, induction hardening, also known as high frequency or induction quenching, is performed to form a receiving layer 222A. Induction hardening may include using an induced current (e.g., a frequency of 10 Hz to 10,000 Hz) to heat or cool only the area that needs to be hardened to form a surface hardened layer with high hardness and high wear resistance in the area. Wherein, in the present embodiment, only the surface treatment of the threshing portion 222 forms the receiving layer 222A, and in an optional embodiment, a hardened layer with a first hardness can also be formed on the surface of the entire threshing body 222 to enhance the hardness of the entire threshing body 222 surface, so as to improve the wear resistance of the entire threshing portion 222 surface, and there is no specific limitation.

[0082] After the induction hardening is performed, a shot peening operation may be performed to form a compressive stress layer on the surface of the receiving layer 222A. Finally, final machining or grinding is performed to form the final threshed body 22.

[0083] Furthermore, this embodiment also discloses a corn harvester, Figure 8As shown, the corn harvester includes the threshing drum 100 of the corn harvester described above, and also includes a motor 60, which is used to drive the spindle 30 and the barrel 10 to rotate at the same time, and the rotation speed of the spindle 30 is different from the rotation speed of the barrel 10. In this way, it is possible to avoid the problem of uneven heat dissipation caused by the external air flowing out through the first opening 30B and always blowing to the fixed position of the barrel 10 when the spindle 30 and the barrel 10 rotate at the same speed. That is, when the rotation speed of the spindle 30 is different from the rotation speed of the barrel 10, the external air flows out through the first opening 30B and blows to different positions of the barrel 10, thereby improving the uniformity of heat dissipation of the barrel 10.

[0084] Further, continue to participate Figure 8 As shown, a driving part 13 is provided on the barrel 10, and the driving part 13 is provided at the end of the barrel 10, and the diameter of the driving part 13 is smaller than the diameter of the barrel 10. In addition, the corn harvester also includes a belt assembly 70, and the belt assembly 70 includes a first belt 71 and a second belt 72, the first belt 71 is connected to the driving part 14, and the second belt 72 is connected to the spindle 30, and the diameters of the driving part 13 and the spindle 30 are different. In this embodiment, by providing a motor 60 to drive the spindle 30 and the barrel 10 at the same time, the volume of the corn harvester can be reduced and compactness can be achieved. At the same time, the motor 60 drives the barrel 10 and the spindle 30 at the same time through the belt assembly 70, and the rotation speeds of the spindle 30 and the driving part 13 can be different by making the diameters of the driving part 13 and the spindle 30 different, which has a simple structure and low cost.

[0085] Further, see Fig. 9 As shown, the corn harvester of this embodiment includes not only the above-mentioned threshing drum 100, but also a thermoelectric conversion device 200 and an air pump 300. The thermoelectric conversion device 200 is connected to the threshing drum 100 of the corn harvester for cooling the external body, and the first fan 30 is used to suck the cooled external air into the first heat dissipation channel 10B through the air inlet 30A. The air pump 300 is connected to the thermoelectric conversion device 200 and is used to pump the external air into the thermoelectric conversion device 200. The corn harvester of this embodiment pumps the external air into the thermoelectric conversion device 200 through the air pump 300, and after the thermoelectric conversion device 200 cools down, it is drawn into the threshing drum 100 by the first fan 50. In this way, the temperature of the external air drawn into the threshing drum 100 can be sufficiently low, thereby further improving the heat dissipation performance of the threshing drum 100, thereby further avoiding the problem of corn being damaged due to excessive temperature during the threshing process.

[0086] Further, combined with Figures 9 to 12 As shown, the thermoelectric conversion device 200 of this embodiment includes a housing 201 , a Peltier semiconductor 205 , a heat sink 206 , and a second fan 207 accommodated in the housing 201 .

[0087] The housing 201 is provided with an air inlet 202 and an air outlet 203 . A refrigeration cavity 200B is formed between the cold end of the Peltier semiconductor 205 and the bottom of the housing 201 . The refrigeration cavity 200B is in communication with the air inlet 202 and the air outlet 203 .

[0088] Specifically, a metal partition 204 is provided in the housing 201, and the metal partition 204 divides the cavity in the housing 201 into a first cavity 200A and a second cavity 200B. The cold end of the Peltier semiconductor 205 is in close contact with the metal partition 204. After power is turned on, the cold end of the Peltier semiconductor 205 cools the metal partition 204, and then cools the gas pumped into the second cavity 200B through the air inlet 202, and the second cavity 200B forms a refrigeration cavity. A heat sink 206 is installed at the hot end of the Peltier semiconductor 205, and a second fan 207 is installed on the heat sink 206. A heat dissipation port 200C is provided at the top of the housing 201, and the heat dissipation port 200C is directly opposite to the second fan 207.

[0089] The air pump 300 pumps external air into the refrigeration chamber through the air inlet 202, and then pumps it out through the air outlet 203 after being cooled by the Peltier semiconductor 205; the second fan 207 discharges the heat generated by the hot end of the Peltier semiconductor 205 out of the thermoelectric conversion device 200 through the heat dissipation port 200C.

[0090] Further, see Fig.13 As shown, in this embodiment, the temperature of the gas pumped into the second cavity 200B (refrigeration cavity) can also be adjusted by controlling the magnitude of the current supplied to the Peltier semiconductor 205. In addition, in this embodiment, the corn harvester also includes an operation panel 400 and a controller, which is electrically connected to the operation panel 400 and the Peltier semiconductor 205. The Peltier semiconductor 205 has a plurality of different refrigeration temperatures, such as a first refrigeration temperature, a second refrigeration temperature, a third refrigeration temperature, and a fourth refrigeration temperature that increase in sequence. The operation panel 400 includes a first button 401 and a plurality of indicator lights 402. When the first button 401 is operated, a temperature switching instruction is sent to the controller. After the controller receives the temperature switching instruction sent from the first button 401, it controls the current flowing through the Peltier semiconductor 205 to work according to the magnitude of the current corresponding to the preset mode. For example, by operating the first button 401 to switch between the first refrigeration temperature to the fourth refrigeration temperature mode in which the refrigeration temperature increases in sequence, the corresponding indicator light 402 is lit to indicate that the corresponding temperature mode is selected. In this embodiment, by setting different refrigeration temperatures, the refrigeration needs of different situations can be met.

[0091] Ginseng Fig.14As shown, in this embodiment, the operation panel 400 also includes a display area 403, which includes a display screen, and the display area 403 is used to display the gears corresponding to different refrigeration temperatures. For example, the first refrigeration temperature mode is gear 1, the second refrigeration temperature mode is gear 2, the third refrigeration temperature mode is gear 3, and the fourth refrigeration temperature mode is gear 4. When the first button 401 is operated and the first refrigeration temperature mode is selected, the display area displays the character of gear 1 so that the operator can clearly and intuitively confirm the gear of the refrigeration temperature mode. In this embodiment, the operator can intuitively know the selected refrigeration temperature mode through the indication of the indicator light 402 or the display of the display area 403, and the operation is simple and convenient. In addition, in the present embodiment, the first refrigeration temperature mode indicates that the refrigeration temperature of the Peltier semiconductor 205 is -10°C, the second refrigeration temperature mode indicates that the refrigeration temperature of the Peltier semiconductor 205 is -5°C, the third refrigeration temperature mode indicates that the refrigeration temperature of the Peltier semiconductor 205 is 0°C, and the fourth refrigeration temperature mode indicates that the refrigeration temperature of the Peltier semiconductor 205 is 5°C. Of course, the temperatures of each refrigeration temperature mode are not limited to the above-mentioned contents, and can also be other temperatures, which are not specifically limited here.

[0092] Further, see Fig.15 As shown, in this embodiment, the operation panel 400 also includes a second button 404, and the operation of the second button 404 can adjust the specific cooling temperature of the Peltier semiconductor 205. For example, pressing the second button 404 can increase the cooling temperature from -10°C in accordance with the rule of increasing 1°C each time it is pressed. It is also possible to press the second button 404 to decrease the cooling temperature from 10°C in accordance with the rule of decreasing 1°C each time it is pressed, and the specific details are not limited. In this way, the cooling temperature can be adjusted more accurately. In addition, the cooling temperature can also be directly displayed in the display area. For example, 0°C indicates that the cooling temperature of the Peltier semiconductor 205 is 0°C at this time. In this way, the adjustment of the cooling temperature of the Peltier semiconductor 205 is more convenient and the display is more intuitive.

[0093] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other. In addition, the different parts between the various embodiments can also be used in combination with each other, and the present invention is not limited to this.

[0094] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A threshing drum, characterized in that: include: The cylinder body can be driven to drive a plurality of threshing seats arranged on the outer surface of the cylinder body to rotate, and the cylinder body has an axially extending inner cavity, and the threshing seats are provided with air outlets; A spindle is rotatably accommodated in the inner cavity, an air inlet is provided on the spindle and a first heat dissipation duct is formed between the spindle and the inner wall of the cylinder, and the first heat dissipation duct is connected with the air outlet and the air inlet; The first fan is contained in the inner cavity and mounted on the spindle, so as to draw external air into the first heat dissipation duct through the air inlet to dissipate heat to the cylinder and the threshing seat, and then the air flows out from the air outlet.

2. The threshing drum according to claim 1, characterized in that: A second heat dissipation duct is arranged in the threshing seat, and the second heat dissipation duct is communicated with the air outlet.

3. The threshing drum according to claim 2, characterized in that: The threshing seat comprises a mounting seat and a threshing body, wherein the mounting seat is integrally formed with the cylinder; the threshing body is sleeved outside the mounting seat and fixedly connected to the mounting seat via a connecting piece, and the air outlet passes through the mounting seat and the side wall of the threshing body.

4. The threshing drum according to claim 1, characterized in that: The spindle includes a first part and a second part, the air inlet is formed in the first part and extends axially, and the second part is a solid structure; the fan is installed at the junction of the first part and the second part, and the ratio of the length of the first part to the total length of the spindle is greater than 0 and less than or equal to 1 / 2.

5. The threshing drum according to claim 1, characterized in that: It also includes a first end cover and a second end cover, the inner cavity has a first end and a second end opposite to the first end in the axial direction, the first end cover and the cylinder are integrally formed and block the first end of the inner cavity, and the second end cover is detachably connected to the cylinder to block the second end of the inner cavity; and the core shaft passes through and is installed on the first end cover and the second end cover.

6. The threshing drum according to claim 1, characterized in that: The plurality of threshing bodies are located at different positions in the axial direction and radial direction of the cylinder.

7. A corn harvester, characterized in that: The threshing drum comprises the threshing drum according to any one of claims 1 to 6; and further comprises: A motor is used to drive the spindle and the barrel to rotate simultaneously, and the rotation speed of the spindle is different from the rotation speed of the barrel.

8. The corn harvester according to claim 7, characterized in that: A driving part is provided on the cylinder, and the driving part is provided at the end of the cylinder, and the diameter of the driving part is smaller than the diameter of the cylinder; the corn harvester also includes a first belt and a second belt, the first belt is connected to the driving part, and the second belt is connected to the central shaft, and the diameters of the driving part and the central shaft are different.

9. A corn harvester, characterized in that: The threshing drum comprises the threshing drum according to any one of claims 1 to 6; and further comprises: a thermoelectric conversion device connected to the threshing drum of the corn harvester and used for cooling the external air, wherein the first fan is used for sucking the cooled external air into the first heat dissipation channel through the air inlet; An air pump is connected to the thermoelectric conversion device and is used to pump the external gas into the thermoelectric conversion device.

10. The corn harvester according to claim 9, characterized in that: The thermoelectric conversion device comprises a housing and a Peltier semiconductor, a heat sink and a second fan contained in the housing; An air inlet and an air outlet are provided on the shell, a refrigeration cavity is formed between the cold end of the Peltier semiconductor and the bottom of the shell, and the refrigeration cavity is connected with the air inlet and the air outlet; The heat sink is installed at the hot end of the Peltier semiconductor, a second fan is installed on the heat sink, and a heat dissipation port is provided on the top of the housing, and the heat dissipation port faces the second fan; The air pump pumps the external air into the refrigeration chamber through the air inlet, and then pumps the external air out through the air outlet after being cooled by the Peltier semiconductor. The second fan discharges the heat generated by the semiconductor hot end out of the thermoelectric conversion device through the air outlet.

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