Small corn thresher

Abstract

The utility model provides a small corn thresher, and belongs to the technical field of agricultural machinery. Comprising a feeding hopper, a discharging hopper and a threshing mechanism located between the feeding hopper and the discharging hopper, the threshing mechanism comprises four transmission rollers which are vertically arranged and rotationally connected between the feeding hopper and the discharging hopper, and a first threshing unit is arranged between every two transmission rollers which are arranged at intervals; a first threshing unit is arranged between the two transmission rollers arranged at intervals, a second threshing unit is arranged between the other two transmission rollers arranged at intervals, the first threshing unit and the second threshing unit each comprise a plurality of threshing belts between the two transmission rollers corresponding to traction loads, and the threshing belts in the first threshing unit and the threshing belts in the second threshing unit are arranged at intervals; a threshing belt in the first threshing unit and a threshing belt in the second threshing unit are in a cross shape, avoiding notches for avoiding the threshing belts are formed in the circumferential face of the outer threshing cylinder, and nine threshing channels located in the outer threshing cylinder are formed by the threshing belts and the outer threshing cylinder. The device has the advantages of high efficiency and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of agricultural machinery and relates to a small corn thresher. Background Art

[0002] Small corn threshers usually insert corn cobs one by one and use the extrusion rotating parts in the feed path to peel off the corn kernels outside the corn cobs. Large corn threshers usually need to guide and position the randomly fed corn cobs first, and then use the threshing plate to move relative to it to achieve threshing.

[0003] Small-scale corn threshing equipment generally has only one feeding path, with materials being fed in and discharged one by one, which is inefficient and labor-intensive. Utility Model Content

[0004] The purpose of the utility model is to provide a small corn thresher in view of the above problems existing in the prior art. The technical problem to be solved by the utility model is how to improve the efficiency.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a small corn thresher, characterized in that it includes a feed hopper, a discharge hopper and a threshing mechanism located between the feed hopper and the discharge hopper, the threshing mechanism includes four vertically arranged transmission rollers that are rotatably connected between the feed hopper and the discharge hopper, wherein a first threshing unit is arranged between two transmission rollers that are arranged alternately, and a second threshing unit is arranged between the other two transmission rollers that are arranged alternately, the first threshing unit and the second threshing unit both include a threshing belt between two transmission rollers corresponding to a plurality of traction loads, the threshing belt in the first threshing unit and the threshing belt in the second threshing unit are arranged alternately, the threshing belt in the first threshing unit and the threshing belt in the second threshing unit are in a cross shape, the threshing mechanism also includes an outer threshing cylinder, a circumferential surface of the outer threshing cylinder is provided with an avoidance notch for avoiding the threshing belt, and the threshing belt and the outer threshing cylinder form nine threshing channels located in the outer threshing cylinder.

[0006] Furthermore, both surfaces of the threshing belt are provided with raised threshing heads, and the transmission roller is provided with a meshing gear ring adapted to the threshing heads.

[0007] Furthermore, an outer casing is provided between the inlet hopper and the outlet hopper, and each driving roller is located inside the outer casing.

[0008] Furthermore, the transmission roller is an eccentric roller.

[0009] Furthermore, the inner wall of the outer threshing cylinder is densely covered with threshing protrusions.

[0010] Furthermore, the threshing belt is a rubber belt, and the threshing head on the threshing belt is hard plastic.

[0011] In this scheme, each group of threshing belts connected in the first place has two straight sections in the outer threshing cylinder. The two groups of threshing belts form four straight parts in the outer threshing cylinder, which are in the shape of a "well". The existence of the outer threshing cylinder forms an irregular nine-square grid, that is, nine threshing channels, and the corn cobs to be threshed enter the hopper. Due to the movement of the threshing belt, the corn cobs enter the threshing channel and are threshed under the action of the threshing belt in a moving state.

[0012] Since the outer dimensions of corn cobs have a certain range, and the outer dimensions of corn cobs will also change in the later stage of partial threshing, in order to adapt to corn cobs with different outer diameters, and to reduce the residual corn kernels on the corn cobs after discharging, and to improve the threshing quality, in this scheme, the transmission roller is set as an eccentric roller, that is, the rotation axis of the transmission roller is located at the eccentric position of the transmission roller body, so that the threshing belt is continuously offset during the rotation of the transmission roller, instead of being in a straight running state all the time. This offset will cause the size of the threshing channel to change continuously, sometimes squeezing the corn cobs, and sometimes loosening the corn cobs. Under the action of the corn cobs' own weight, they slowly descend, and the corn kernels and corn cobs are discharged from the discharge hopper, and they only need to be filtered and sorted later. It can be seen that the eccentrically set transmission roller can not only improve the quality of corn threshing and adapt to corn cobs with different outer diameters, but also avoid small-sized corn cobs from being directly discharged from the discharge hopper without being threshed.

[0013] Corn cobs can be vertically inserted into each threshing channel or randomly placed into the hopper. In the random placement method, due to the flipping action of the threshing belt close to the hopper, the probability of corn cobs getting stuck at the hopper is also low. As long as too many corn cobs are not put in at one time, the movement of the threshing belt can be effectively utilized to guide the corn cobs, so that they tend to be in a vertical state and enter the threshing channel.

[0014] Compared with the existing small thresher, this solution can multiply the number of corn cobs that can be threshed simultaneously, thereby improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of this thresher.

[0016] Figure 2 yes Figure 1 Schematic diagram of the structure of the medium thresher after removing the outer casing.

[0017] Figure 3 It is a structural schematic diagram of an outer threshing cylinder.

[0018] Figure 4 It is a schematic diagram of the structure when the first threshing unit and the second threshing unit are in a coordinated state.

[0019] Figure 5It is a schematic diagram of the formation principle of the nine threshing channels of the thresher.

[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of the threshing belt (a section of the threshing belt).

[0021] In the figure, 1, feed hopper; 2, discharge hopper; 3, transmission roller; 4, threshing belt; 5, threshing head; 6, outer protective tube; 7, threshing channel; 8, outer threshing tube; 9, avoidance gap. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] like Figure 1-Figure 6 The small corn thresher shown comprises an inlet hopper 1, an outlet hopper 2 and a threshing mechanism located between the inlet hopper 1 and the outlet hopper 2, the threshing mechanism comprises four vertically arranged transmission rollers 3 rotatably connected between the inlet hopper 1 and the outlet hopper 2, wherein a first threshing unit is arranged between two of the transmission rollers 3 arranged alternately, and a second threshing unit is arranged between the other two transmission rollers 3 arranged alternately, the first threshing unit and the second threshing unit both comprise a threshing belt 4 between two transmission rollers 3 corresponding to a plurality of traction loads, the threshing belt 4 in the first threshing unit and the threshing belt 4 in the second threshing unit are arranged alternately, the threshing belt 4 in the first threshing unit and the threshing belt 4 in the second threshing unit are in a cross shape, the threshing mechanism also comprises an outer threshing cylinder 8, an avoidance notch 9 for avoiding the threshing belt 4 is provided on the circumferential surface of the outer threshing cylinder 8, the threshing belt 4 and the outer threshing cylinder 8 form nine threshing channels 7 located in the outer threshing cylinder 8.

[0024] Furthermore, both surfaces of the threshing belt 4 have a raised threshing head 5, and the driving roller 3 has a meshing gear ring adapted to the threshing head 5. It should be noted here that, in fact, the transmission principle of the threshing belt 4 and the meshing gear ring is the same as the transmission principle of the traditional toothed belt and gear, except that the teeth of the gear are replaced by the threshing head 5, which is the requirement of synchronous transmission.

[0025] An outer casing 6 is also provided between the inlet hopper 1 and the outlet hopper 2 , and each driving roller 3 is located inside the outer casing 6 .

[0026] The driving roller 3 is an eccentric roller; the inner wall of the outer threshing cylinder 8 is densely covered with threshing protrusions.

[0027] The threshing belt 4 is a rubber belt, and the threshing head 5 on the threshing belt 4 is hard plastic.

[0028] In addition, it should be noted that the traction speed, traction direction and traction rules of the threshing belt 4 can be adjusted as needed, such as controlling the intermittent forward and reverse rotation of the transmission roller 3, increasing or decreasing the rotation speed of the transmission roller 3, adjusting the rotation direction of the two sets of transmission rollers 3, etc.

[0029] In the present scheme, each group of the first connected threshing belts 4 has two straight sections in the outer threshing cylinder 8, and the two groups of threshing belts 4 form four straight parts in the outer threshing cylinder 8, which are in the shape of a "well". The existence of the outer threshing cylinder 8 forms an irregular nine-square grid, that is, nine threshing channels 7, and the hopper 1 enters the corn cobs to be threshed. Due to the movement of the threshing belts 4, the corn cobs enter the threshing channels 7 and are threshed under the action of the threshing belts 4 in the moving state.

[0030] Since the outer dimensions of corn cobs have a certain range, and the outer dimensions of corn cobs will also change in the later stage of partial threshing, in order to adapt to corn cobs with different outer diameters, and in order to reduce the residual corn kernels on the corn cobs after discharging, and improve the threshing quality, in this scheme, the transmission roller 3 is set as an eccentric roller, that is, the rotation axis of the transmission roller 3 is located at the eccentric position of the roller body of the transmission roller 3, so that the threshing belt 4 is constantly offset during the rotation of the transmission roller 3, instead of being in a straight running state all the time. This offset will cause the size of the threshing channel 7 to change continuously, sometimes squeezing the corn cobs, and sometimes loosening the corn cobs. Under the action of the corn cobs' own weight, they slowly descend, and the corn kernels and corn cobs are discharged from the discharge hopper 2, and they only need to be filtered and sorted later; it can be seen that the eccentrically set transmission roller 3 can not only improve the corn threshing quality and adapt to corn cobs with different outer diameters, but also avoid small-sized corn cobs from being directly discharged from the discharge hopper 2 without threshing.

[0031] Corn cobs can be vertically inserted into each threshing channel 7, or they can be randomly placed into the feed hopper 1. In the random placement method, due to the flipping action of the threshing belt 4 close to the feed hopper 1, the probability of corn cobs getting stuck at the feed hopper 1 is also low. As long as too many corn cobs are not put in at one time, the movement of the threshing belt 4 can be effectively utilized to guide the corn cobs so that they tend to be in a vertical state and enter the threshing channel 7.

[0032] Compared with the existing small thresher, this solution can multiply the number of corn cobs that can be threshed simultaneously, thereby improving efficiency.

[0033] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A small corn thresher, characterized in that: The invention comprises an inlet hopper (1), an outlet hopper (2) and a threshing mechanism located between the inlet hopper (1) and the outlet hopper (2), wherein the threshing mechanism comprises four transmission rollers (3) arranged vertically and rotatably connected between the inlet hopper (1) and the outlet hopper (2), wherein a first threshing unit is arranged between two transmission rollers (3) arranged alternately, and a second threshing unit is arranged between the other two transmission rollers (3) arranged alternately, and the first threshing unit and the second threshing unit each comprise a plurality of traction loads corresponding to the two transmission rollers (3). The threshing mechanism further comprises an outer threshing cylinder (8), a peripheral surface of the outer threshing cylinder (8) is provided with an avoidance notch (9) for avoiding the threshing belt (4), and the threshing belt (4) and the outer threshing cylinder (8) form nine threshing channels (7) located in the outer threshing cylinder (8).

2. A small corn thresher according to claim 1, characterized in that: Both surfaces of the threshing belt (4) are provided with protruding threshing heads (5), and the transmission roller (3) is provided with a meshing gear ring matched with the threshing head (5).

3. A small corn thresher according to claim 1, characterized in that: An outer casing (6) is also provided between the inlet hopper (1) and the outlet hopper (2), and each transmission roller (3) is located inside the outer casing (6).

4. A small corn thresher according to claim 1, 2 or 3, characterized in that: The transmission roller (3) is an eccentric roller.

5. A small corn thresher according to claim 1, 2 or 3, characterized in that: The inner wall of the outer threshing cylinder (8) is densely covered with threshing protrusions.

6. A small corn thresher according to claim 1, 2 or 3, characterized in that: The threshing belt (4) is a rubber belt, and the threshing head (5) on the threshing belt (4) is hard plastic.

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