Hand-operated corn thresher

Abstract

The utility model discloses a hand-operated corn thresher, and mainly relates to a corn thresher. Comprising a fixing bayonet and a main supporting rod. One end of the fixing bayonet is in threaded connection with an adjusting screw, and the other end of the fixing bayonet is fixed to the main supporting rod. A ball bearing is arranged on one side of the main support rod away from the fixed bayonet; an anti-jumping outer cover is welded on the outer ring of the ball bearing, and a shattering port is formed below the anti-jumping outer cover; a threshing gear ring is connected in the anti-jumping outer cover through a ball bearing inner ring; rockers are arranged on the outer sides of inner rings of the ball bearings. The corn thresher has the advantages that during threshing, the corn thresher only needs to be fixed to the table board, corn is put into the table board to be pushed and rotated at the same time, complete threshing can be achieved, and the corn thresher is quite convenient and time-saving to use; when the small threshing gear ring is damaged, only the small threshing gear ring needs to be replaced; when small corn is threshed, the small threshing gear ring is taken out, adjusted and then put back, and the hand-operated corn thresher is wide in application range and low in replacement cost.

Description

Technical Field

[0001] The utility model relates to a corn thresher, in particular to a hand-cranked corn thresher. Background Art

[0002] In life, whether people grow a large amount of corn for sale or grow a small amount of corn for their own consumption, they will face the problem of threshing. For a large amount of corn, people usually choose a self-propelled corn thresher, while for a small amount of corn, people usually choose a hand-cranked corn thresher. The hand-cranked corn thresher only needs to be clamped on the table board and tightened, and then the corn is put in and turned while pushing to complete threshing. Since the sizes of various corns are different, the diameters of the willow leaf stirring knives required are also different. When encountering large corns, threshing can be directly carried out. However, when encountering small corns, if the corns are directly put into the corn thresher, the corns will not be threshed. At this time, pliers are needed to adjust the arc of the blades of the threshing tooth ring according to the size of the corn, and then threshing is carried out. When the sizes of the corns are different, the arc of the blades of the threshing tooth ring needs to be continuously adjusted with pliers or the corns need to be sorted by size before starting threshing. Moreover, this kind of corn thresher cannot completely thresh the corn kernels on the pointed part of the corn during use. This kind of corn thresher is not only very cumbersome to use but also very time-consuming. Therefore, it is best to design a tool that is convenient and time-saving to solve the existing deficiencies. Content of the Utility Model

[0003] The purpose of the utility model is to provide a hand-cranked corn thresher, which does not need to continuously adjust the arc of the blades in the threshing tooth ring with pliers according to the size of the corn during use, nor does it need to sort the sizes of the corns before starting threshing. When encountering large corns, the corn kernels will be threshed by the threshing tooth ring, and the corn kernels on the pointed part of the corn will be threshed by the small threshing tooth ring; when encountering small corns, the corn kernels will be threshed by the small threshing tooth ring. This kind of corn thresher is very convenient and time-saving in use.

[0004] In order to achieve the above object, the utility model is realized through the following technical solutions:

[0005] A hand-cranked corn thresher includes a fixed bayonet and a main support rod; one end of the fixed bayonet is threadedly connected with an adjusting screw, and the other end of the fixed bayonet is fixedly connected with the main support rod by welding; a ball bearing is arranged on the side of the main support rod away from the fixed bayonet, an anti-external bounce outer cover is welded to the outer ring of the ball bearing, and a grain dropping port is arranged below the anti-external bounce outer cover, so that the corn kernels can fall through the grain dropping port without scattering; a threshing tooth ring is connected to the inner ring of the ball bearing through the inner ring of the ball bearing. The threshing tooth ring is designed with willow leaf blades and usually has five blades; a rocker is arranged on the outer side of the inner ring of the ball bearing, and the outer side of the inner ring of the ball bearing is fixedly connected with the rocker by welding.

[0006] Inside the threshing tooth ring, there is a small threshing tooth ring. The diameter and axial length of the small threshing tooth ring are smaller than those of the threshing tooth ring. The diameter of the small threshing tooth ring is 6 mm to 10 mm smaller than that of the threshing tooth ring, and the axial length of the small threshing tooth ring is 20 mm to 40 mm smaller than that of the threshing tooth ring. This is to enable large corns to be threshed by the threshing tooth ring and the tips of large corns and small corns to be threshed by the small threshing tooth ring during use.

[0007] The small threshing tooth ring and the threshing tooth ring are detachably connected by means of snap connection. When the small threshing tooth ring needs to adjust the blade curvature of the willow leaf stirrer, the small threshing tooth ring can be taken out of the threshing tooth ring.

[0008] On the outer side of the small threshing tooth ring, there are protrusions of the snap, and on the inner side of the threshing tooth ring, there are grooves adapted to the protrusions. After the protrusions are snapped into the grooves, the movement of the small threshing tooth ring relative to the threshing tooth ring is limited.

[0009] At the end of the rocker, there is a solid wood handle, which provides a better grasping method during use.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] 1. For the hand-cranked corn thresher provided by the present invention, during threshing, only need to tighten and fix the fixed bayonet of the hand-cranked corn thresher on the table board, and then put the corn in and turn it while pushing, and complete threshing. There is no need to constantly adjust with pliers when the corn sizes are different or to sort the corn sizes before starting threshing. This kind of corn thresher is very convenient and time-saving in use.

[0012] 2. For this kind of hand-cranked corn thresher, when the small threshing tooth ring is damaged, there is no need to replace the whole corn thresher, only need to take out the small threshing tooth ring and replace it; when it is necessary to thresh very small corns, the small threshing tooth ring can be taken out, adjusted and then put back. This kind of hand-cranked corn thresher has a wide range of applications and low replacement costs. Brief Description of the Drawings

[0013] Attached Figure 1 is the structural schematic diagram of the present utility model.

[0014] Attached Figure 2 is the structural schematic diagram of the present utility model.

[0015] Attached Figure 3 is the structural schematic diagram of the small threshing tooth ring in the present utility model.

[0016] Attached Figure 4 is the structural schematic diagram of the threshing tooth ring in the present utility model.

[0017] Reference numerals shown in the drawings:

[0018] 1. Fixed bayonet; 2. Main support rod; 3. Adjusting screw; 4. Ball bearing; 5. Outer ring; 6. Outer cover to prevent outward bounce; 7. Grain dropping opening; 8. Inner ring; 9. Threshing tooth ring; 10. Rocker; 11. Small threshing tooth ring; 12. Protrusion; 13. Card slot; 14. Solid wood crank handle. Detailed implementation manners

[0019] The following further elaborates on the present utility model in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0020] The present utility model relates to a hand-cranked corn thresher, and its main structure includes a fixed bayonet 1 and a main support rod 2. The fixed bayonet 1 is designed to be conveniently fixed and installed on a suitable object; one end of the fixed bayonet 1 is threadedly connected with an adjusting screw 3, and the other end of the fixed bayonet 1 is fixed to the main support rod 2. The fixed bayonet 1 and the main support rod 2 are fixed together by welding; on the side of the main support rod 2 away from the fixed bayonet 1, there is a ball bearing 4, and the ball bearing 4 will not jam during use; the outer ring 5 of the ball bearing 4 is fixed to the main support rod 2 by welding; the outer ring 5 of the ball bearing 4 is welded with an outer cover 6 to prevent outward bounce. Below the outer cover 6 to prevent outward bounce, there is a grain dropping opening 7, which can make the corn kernels fall through the grain dropping opening 7 without scattering; inside the outer cover 6 to prevent outward bounce, there is a threshing tooth ring 9 connected through the inner ring 8 of the ball bearing 4. The threshing tooth ring 9 is designed with willow leaf blades, making the peeled corn kernels complete and clean. The threshing tooth ring 9 usually has five blades; on the outside of the inner ring 8 of the ball bearing 4, there is a rocker 10, and the outside of the inner ring 8 of the ball bearing 4 is fixed to the rocker 10 by welding.

[0021] Inside the threshing tooth ring 9, there is a small threshing tooth ring 11. The diameter and axial length of the small threshing tooth ring 11 are both smaller than those of the threshing tooth ring 9. The diameter of the small threshing tooth ring 11 is 6 mm - 10 mm smaller than the diameter of the threshing tooth ring 9, and the axial length of the small threshing tooth ring 11 is 20 mm - 40 mm smaller than the axial length of the threshing tooth ring 9. This is to ensure that during use, large corns can be threshed by the threshing tooth ring 9, the corn cobs can pass through the small threshing tooth ring 11, and the tips of large corns and small corns can be threshed by the small threshing tooth ring 11, thereby ensuring the smooth passage of corns and corn cobs during use.

[0022] The small threshing tooth ring 11 and the threshing tooth ring 9 are detachably connected by a snap-fastening method. When the blade arc of the willow leaf stirrer of the small threshing tooth ring 11 needs to be adjusted, the small threshing tooth ring 11 can be taken out from the threshing tooth ring 9.

[0023] A buckle projection 12 is provided on the outer side of the small threshing tooth ring 11, and a clamping groove 13 adapted to the projection 12 is provided on the inner side of the threshing tooth ring 9. After the projection 12 is snapped into the clamping groove 13, the movement of the small threshing tooth ring 11 relative to the threshing tooth ring 9 is limited, avoiding the relative movement between the small threshing tooth ring 11 and the threshing tooth ring 9 during use.

[0024] In order to better grip during use, a solid wood handle 14 is provided at the end of the rocker 10. During use, the rocker 10 will not break away from the hand, ensuring the safety of use.

[0025] Detailed description of the usage method:

[0026] When using the hand-cranked corn thresher, first adjust the distance between the fixed buckle 1 and the adjusting screw 3 of the hand-cranked corn thresher to the maximum, snap the fixed buckle 1 onto a suitable object, such as a tabletop. After snapping it in, tighten the adjusting screw 3 to fix the hand-cranked corn thresher on the tabletop. Take out the corn and put the corn in from the other side of the outer cover 6 that prevents outward bouncing and is welded with the outer ring 5 of the ball bearing 4. At this time, hold the solid wood handle 14 and rotate it. The solid wood handle 14 drives the rocker 10 to rotate, the rocker 10 drives the inner ring 8 of the ball bearing 4 to rotate, and the inner ring 8 of the ball bearing 4 drives the threshing tooth ring 9 and the small threshing tooth ring 11 to rotate. When rotating, push the corn in. The large corn is threshed by the threshing tooth ring 9, and the corn cob can pass through the small threshing tooth ring 11. The tips of the large corn and the small corn can be threshed by the small threshing tooth ring 11. The threshed corn kernels bounce around randomly, and the randomly bouncing corn kernels are blocked by the outer cover 6 that prevents outward bouncing and fall through the grain outlet 7 below the outer cover 6 that prevents outward bouncing. Take out the threshed corn cob, and the threshing is completed.

[0027] When it is necessary to replace the small threshing tooth ring 11 or when the corn is very small but needs to be threshed, the small threshing tooth ring 11 can be pulled towards the blade direction of the threshing tooth ring 9, and then rotated in the opposite direction to the rotation direction of the threshing tooth ring 9 to disengage the projection 12 on the outer side of the small threshing tooth ring 11 from the clamping groove 13 on the outer side of the threshing tooth ring 9 that is adapted to the projection 12, and then the small threshing tooth ring 11 can be taken out. At this time, only need to replace the small threshing tooth ring 11 or adjust the arc of the blade of the small threshing tooth ring 11 with pliers. Then put the small threshing tooth ring 11 in, fit the projection 12 on the outer side of the small threshing tooth ring 11 with the clamping groove 13 on the outer side of the threshing tooth ring 9 that is adapted to the projection 12, rotate the small threshing tooth ring 11 in the rotation direction of the threshing tooth ring 9, and push the small threshing tooth ring 11 in the direction away from the blade of the threshing tooth ring 9, that is, the small threshing tooth ring 11 is fixed to the threshing tooth ring 9, and at this time the replacement or adjustment is completed.

Claims

1. A hand-cranked corn thresher, comprising a fixed bayonet (1) and a main support rod (2); one end of the fixed bayonet (1) is threadedly connected with an adjusting screw (3), and the other end of the fixed bayonet (1) is fixed to the main support rod (2); a ball bearing (4) is provided on one side of the main support rod (2) away from the fixed bayonet (1), an outer ring (5) of the ball bearing (4) is welded with an outer cover (6) to prevent outward bouncing, a grain dropping port (7) is arranged below the outer cover (6) to prevent outward bouncing, a threshing tooth ring (9) is connected inside the outer cover (6) to prevent outward bouncing through an inner ring (8) of the ball bearing (4), and a rocker (10) is arranged outside the inner ring (8) of the ball bearing (4); characterized in that: Inside the threshing tooth ring (9), there is a small threshing tooth ring (11). The diameter and axial length of the small threshing tooth ring (11) are both smaller than those of the threshing tooth ring (9). The diameter of the small threshing tooth ring (11) is 6 mm to 10 mm smaller than that of the threshing tooth ring (9), and the axial length of the small threshing tooth ring (11) is 20 mm to 40 mm smaller than that of the threshing tooth ring (9).

2. The hand-cranked corn thresher according to claim 1, characterized in that: The small threshing tooth ring (11) and the threshing tooth ring (9) are detachably connected by means of snap connection of a snap fastener.

3. The hand-cranked corn thresher according to claim 2, wherein: On the outer side of the small threshing tooth ring (11)(9), there are protrusions (12) of a snap fastener. Inside the threshing tooth ring (9), there are grooves (13) adapted to the protrusions (12). After the protrusions (12) are snapped into the grooves (13), the movement of the small threshing tooth ring (11) relative to the threshing tooth ring (9) is limited.

4. The hand-cranked corn thresher according to claim 3, characterized in that: At the end of the rocker (10), there is a solid wood handle (14).

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