Corn thresher

Abstract

The utility model provides a corn thresher capable of reducing abrasion of a corn baffle on a threshing side and improving threshing efficiency and effect, and relates to the technical field of agricultural machinery. The corn thresher comprises a threshing bin and at least one threshing roller arranged in the threshing bin, the threshing bin comprises a corn baffle and a cover plate, the corn baffle is arranged on the side face of the threshing roller, the corn baffle is covered with the cover plate, the corn baffle and the cover plate define the threshing bin, the corn baffle is provided with a material blocking part bent towards the interior of the threshing bin, and the material blocking part is arranged on the threshing bin. Protruding threshing strips are installed on the inner side face of the material blocking part of the corn baffle on the threshing side. The service life of the rice baffle is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to a corn thresher. Background Art

[0002] A corn thresher is a device for separating corn kernels from corn stalks. The corn thresher is mainly composed of a threshing bin and a threshing roller arranged in the threshing bin. The threshing roller may be one or more, and the threshing roller is provided with threshing ribs or threshing teeth, and the threshing bin is surrounded by corn baffles arranged on both sides of the threshing roller and a cover plate covered on the corn baffle. For example, a corn thresher based on counter-rotating double rollers is disclosed in Chinese patent application number 201620616323.8. When threshing, the corn thresher mainly relies on its downward rotating side, that is, the corn baffle on the threshing side to block the corn cob, preventing the corn cob from rotating with the threshing roller, thereby relying on the rotation of the threshing roller relative to the corn cob for threshing.

[0003] In order to better block the corn, the corn baffle of the existing corn thresher is provided with a bent portion bent into the threshing bin to form a material blocking portion that blocks the corn from passing between the corn baffle and the threshing roller and rotating. The existing structure is not only easy to wear the corn baffle on the threshing side, but also has a small rotation resistance of the corn, which has an adverse effect on the threshing efficiency and effect of the corn thresher. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a corn thresher which can reduce the wear of corn baffles on the threshing side and improve the threshing efficiency and effect.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a corn thresher, comprising a threshing bin and at least one threshing roller arranged in the threshing bin, the threshing bin comprising a corn baffle and a cover plate, the corn baffle is arranged on the side of the threshing roller, the cover plate is arranged on the corn baffle and forms the threshing bin with the corn baffle, the corn baffle is provided with a material blocking portion bent into the threshing bin, and a raised threshing strip is installed on the inner side surface of the material blocking portion of the corn baffle on the threshing side.

[0006] Furthermore, the threshing strip is arranged along the axial direction of the threshing roller.

[0007] Furthermore, the corn baffle is also provided with a lower folding portion whose one end is connected to the inner end of the material baffle and bent downward, and the threshing bar is installed at the transition point where the inner side surface of the material baffle transitions to the lower folding portion.

[0008] Furthermore, the threshing bar is a steel bar, and the threshing bar is welded on the inner side surface of the material blocking part.

[0009] Furthermore, two threshing rollers rotating outward in opposite directions are arranged in the threshing bin, and the two threshing rollers are connected by a reverse transmission mechanism.

[0010] Furthermore, the reverse transmission mechanism comprises a driving wheel, a driven wheel and a transmission belt for reversely transmitting the two threshing rollers outward;

[0011] The driven wheel is arranged on the outer side of one of the threshing rollers, and pulleys are arranged on the two threshing rollers. After the transmission belt is wound on the driving wheel, it first passes through the upper side of the pulley of one of the threshing rollers, then passes through the lower side of the pulley of the other threshing roller, and finally is wound on the driven wheel and tensioned by the driven wheel.

[0012] The beneficial effect of the utility model is as follows: the corn thresher of the utility model is provided with a raised threshing bar on the inner side of the material blocking part of the corn baffle on the threshing side, so that when the corn cob moves to the material blocking part of the corn baffle on the threshing side under the action of the threshing roller, the corn cob can be supported and blocked by the raised threshing bar, so that the corn cob does not or is not easy to contact with the inner side of the material blocking part, thereby reducing the wear of the corn baffle and improving the service life of the rice baffle. At the same time, the threshing bar can cooperate with the corn kernels on the corn cob during threshing, so that the corn kernels can be separated from the corn stalks, and the rotation resistance of the corn is larger under the action of the threshing bar, which is more conducive to the threshing of the threshing roller, and can improve the threshing effect and efficiency of the thresher. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a corn thresher of the utility model;

[0014] Figure 2 It is another structural schematic diagram of the corn thresher of the utility model;

[0015] Figure 3 yes Figure 2 Right view of;

[0016] Figure 4 It is a structural schematic diagram of the reverse transmission mechanism;

[0017] As shown in the figure: frame 1, threshing bin 2, threshing roller 3, threshing bar 4, corn cob 6, cover plate 21, corn baffle 22, material blocking part 221, lower folding part 222, pulley 31, driving wheel 51, transmission belt 52, driven wheel 53. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] like Figures 1 to 3As shown, the corn thresher of the utility model comprises a frame 1, a threshing bin 2 and at least one threshing roller 3 arranged in the threshing bin 2. The threshing bin 2 comprises a corn baffle 22 and a cover plate 21, wherein the corn baffle 22 is arranged on the side of the threshing roller 3, the cover plate 21 is covered on the corn baffle 22 and forms the threshing bin 2 with the corn baffle 22, the corn baffle 22 is provided with a material blocking portion 221 bent into the threshing bin 2, and a raised threshing bar 4 is installed on the inner side surface of the material blocking portion 221 of the corn baffle 22 on the threshing side.

[0020] The threshing side is the side on which the threshing roller 3 rotates downward. Figure 1 As shown, a corn thresher threshing chamber is provided with only one threshing roller as an example. Figure 1 In the embodiment, the threshing roller rotates counterclockwise for threshing, and the side of the threshing roller rotating downward is the left side, and the threshing side is the left side of the threshing roller. If the threshing roller rotates clockwise for threshing, the side of the threshing roller rotating downward is the right side, and the threshing side is the right side of the threshing roller. In order not to specifically limit the rotation direction of the threshing roller, the threshing strips 4 are arranged on the corn baffles 22 on both sides of the threshing roller, so that the threshing roller rotates clockwise for threshing, and can also rotate clockwise for threshing. In the corn thresher of the utility model, a raised threshing strip 4 is installed on the inner side of the blocking portion 221 of the corn baffle 22 on the threshing side, so that when the corn cob 6 moves to the blocking portion of the corn baffle 22 on the threshing side under the action of the threshing roller 3, the raised threshing strip 4 can support and block the corn cob 6, so that the corn cob does not or is not easy to contact with the inner side of the blocking portion 221, thereby reducing the wear of the corn baffle and improving the service life of the rice baffle. At the same time, during threshing, the threshing bars 4 can cooperate with the corn kernels on the corn cobs 6 to separate the corn kernels from the corn stalks, and under the action of the threshing bars 4, the rotational resistance of the corn is greater, which is more conducive to the threshing of the threshing roller 3, and can improve the threshing effect and efficiency of the thresher.

[0021] It is understandable that, in order to thresh better, the threshing bar is preferably arranged along the axis direction of the threshing roller 3, that is, the threshing bar is arranged parallel to the threshing roller 3. Of course, in some embodiments, the threshing bar is arranged at a certain angle to the axis direction of the threshing roller 3. The threshing bar 4 can be one or more, and the threshing bars 4 are arranged at intervals when there are multiple threshing bars.

[0022] The threshing bar 4 can be installed at any position on the inner side of the material blocking portion. In the embodiment of the utility model, the corn baffle 22 is also provided with a lower folding portion 222 whose one end is connected to the inner end of the material blocking portion 221 (the end extending into the threshing bin) and is bent downward, and the threshing bar 4 is installed at the transition point where the inner side of the material blocking portion 221 transitions to the lower folding portion 222. The threshing bar 4 is installed at the transition point where the inner side of the material blocking portion 221 transitions to the lower folding portion 222, and the strength of the threshing bar 4 installation point is the best, the corn baffle 22 is not easily deformed during use, and the threshing bar 4 has the best effect.

[0023] In the embodiment of the utility model, the threshing bar 4 is a steel bar, and the threshing bar 4 is welded on the inner side of the material stopper 221. Of course, the threshing bar 4 can also be made of other wear-resistant and hard materials, such as plastic, and the threshing bar 4 can also be installed on the inner side of the material stopper 221 by bolt connection.

[0024] In order to improve the threshing efficiency, in one embodiment of the utility model, Figure 2 , Figure 3 As shown, two threshing rollers 3 rotating outward in opposite directions are arranged in the threshing bin 2, and the two threshing rollers 3 are connected by a reverse transmission mechanism to realize outward reverse transmission. In this way, the corn baffles 22 on both sides of the threshing bin are both threshing sides, and the corn baffles 22 on both sides of the threshing bin 2 can be used for threshing at the same time, which can improve the threshing efficiency of the corn thresher.

[0025] The reverse transmission mechanism can be a gear mechanism. In the embodiment of the present utility model, Figure 4 As shown, the reverse transmission mechanism includes a driving wheel 51, a driven wheel 53 and a transmission belt 52 for reversely transmitting the two threshing rollers 3 outward. The driven wheel 53 is arranged on the outside of one of the threshing rollers 3 (the side away from the other threshing roller), and the two threshing rollers 3 are provided with pulleys 31. After the transmission belt 52 is wound around the driving wheel 51, it first passes through the upper side of the pulley 31 of one of the threshing rollers 3, then passes through the lower side of the pulley 31 of the other threshing roller 3, and finally is wound around the driven wheel 53 and is tensioned by the driven wheel 53. Figure 4 For example, when the two threshing rollers 3 need to be rotated outward in the opposite direction, the driving mechanism drives the driving wheel 51 to rotate counterclockwise, and the two threshing rollers 3 can be driven to rotate outward in the opposite direction through the transmission belt 52. Compared with the gear mechanism, the above reverse transmission mechanism has a lower cost.

Claims

1. A corn thresher, comprising a threshing bin (2) and at least one threshing roller (3) arranged in the threshing bin (2), wherein the threshing bin (2) comprises a corn baffle (22) and a cover plate (21), wherein the corn baffle (22) is arranged on the side of the threshing roller (3), and the cover plate (21) is covered on the corn baffle (22) and encloses the threshing bin (2) with the corn baffle (22), characterized in that: The corn baffle (22) is provided with a material blocking portion (221) bent into the threshing bin (2), and a raised threshing bar (4) is installed on the inner side surface of the material blocking portion (221) of the corn baffle (22) on the threshing side.

2. The corn thresher according to claim 1, characterized in that: The threshing strip (4) is arranged along the axial direction of the threshing roller (3).

3. The corn thresher according to claim 1, characterized in that: The corn baffle (22) is also provided with a lower folding portion (222) whose one end is connected to the inner end of the material baffle portion (221) and is bent downward, and the threshing bar (4) is installed at the transition point where the inner side surface of the material baffle portion (221) transitions to the lower folding portion (222).

4. The corn thresher according to any one of claims 1 to 3, characterized in that: The threshing bar (4) is a steel bar, and the threshing bar (4) is welded to the inner side surface of the material blocking portion (221).

5. The corn thresher according to claim 1, characterized in that: Two threshing rollers (3) rotating outward in opposite directions are arranged in the threshing bin (2), and the two threshing rollers (3) are connected in transmission via a reverse transmission mechanism.

6. The corn thresher according to claim 5, characterized in that: The reverse transmission mechanism comprises a driving wheel (51), a driven wheel (53) and a transmission belt (52) for reversely transmitting the two threshing rollers (3) outward; The driven wheel (53) is arranged on the outer side of one of the threshing rollers (3), and the two threshing rollers (3) are both provided with pulleys (31). After the transmission belt (52) is wound around the driving wheel (51), it first passes through the upper side of the pulley (31) of one of the threshing rollers (3), then passes through the lower side of the pulley (31) of the other threshing roller (3), and finally is wound around the driven wheel (53) and is tensioned by the driven wheel (53).

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