Height-adjustable threshing machine

Abstract

The utility model relates to the field of threshers, in particular to a height-adjustable thresher. The threshing device comprises a mounting frame and a threshing mechanism, the mounting frame comprises a connecting frame, two rear supporting legs arranged at the rear end of the connecting frame side by side, two front supporting legs arranged at the front end of the connecting frame side by side, first lower supporting legs detachably arranged on the lower portions of the rear supporting legs and second lower supporting legs detachably arranged on the lower portions of the front supporting legs. The lower portion of the rear supporting leg and the lower portion of the front supporting leg are each provided with a first limiting hole and a first rotating hole lower than the first limiting hole, the first lower supporting leg and the second lower supporting leg are each provided with a second limiting hole corresponding to the first limiting hole and a second rotating hole corresponding to the first rotating hole, and the first rotating holes and the second rotating holes are coaxially distributed and provided with first bolts in a penetrating mode. The height can be increased during use, and the height can be reduced by folding during packaging and transportation or not use, so that the occupied space is reduced, and the packaging, transportation and storage are convenient.

Description

Technical Field

[0001] This utility model relates to the field of threshing machines, and in particular to a height-adjustable threshing machine. Background Technology

[0002] Currently, there are two main methods for threshing corn: mechanical threshing and manual threshing. Common mechanical threshing methods include the following three: The first method involves directly pouring the corn cobs into a drum for crushing, followed by air cleaning; the second method uses spiral-arranged spikes fixed on a vertical conical shaft for threshing; the third method involves fixing a plastic-coated roller to the frame, where corn cobs are manually fed in one by one during threshing, but this method is relatively dangerous and can easily injure the hands.

[0003] Existing corn threshing equipment is bulky, inconvenient for packaging and transportation, and takes up a lot of space when not in use. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a height-adjustable threshing machine. The height can be increased during use and decreased by folding when not in use or during packaging and transportation, thereby reducing the space occupied and facilitating packaging, transportation and storage.

[0005] The present invention provides a height-adjustable threshing machine, comprising a mounting frame and a threshing mechanism. The mounting frame includes a connecting frame, two rear support legs arranged side-by-side at the rear end of the connecting frame, two front support legs arranged side-by-side at the front end of the connecting frame, a first lower support leg detachably disposed below the rear support legs, and a second lower support leg detachably disposed below the front support legs. Both the rear and front support legs have a first limiting hole and a first rotating hole lower than the height of the first limiting hole at their lower parts. Both the first and second lower support legs have a second limiting hole corresponding to the first limiting hole and a second rotating hole corresponding to the first rotating hole. The first and second rotating holes are coaxially distributed and have a first bolt passing through them. When the first and second lower support legs are extended, the first and second limiting holes are coaxial and have a second bolt passing through them. Both the first and second bolts are threaded with nuts. The threshing mechanism is mounted on the mounting frame.

[0006] Preferably, both the first lower support leg and the second lower support leg are U-shaped plate structures. The first lower support leg has a first notch, and the second lower support leg has a second notch. When the first lower support leg and the second lower support leg are deployed, the first lower support leg fits against the side of the rear support leg, and the second lower support leg fits against the side of the front support leg.

[0007] Preferably, the bottom of the first lower support leg is provided with a wheel.

[0008] Preferably, the threshing mechanism includes two threshing members arranged side by side at an angle, a limiting mechanism for adjusting the size of the threshing space formed between the threshing members, and a drive assembly for driving the two threshing members to rotate in opposite directions.

[0009] Preferably, the threshing component includes a rotating shaft that is rotatably mounted on a connecting frame, a threshing cylinder that is coaxially mounted on the rotating shaft, and a first threshing rib and a second threshing rib disposed on the circumference of the threshing cylinder. The first threshing rib is spirally disposed on the circumference of the lower half or the lower third of the threshing cylinder, and the second threshing rib is spirally disposed on the outer circumference of the threshing cylinder and the first threshing rib.

[0010] Preferably, the drive assembly includes a third pulley, one on each of the two rotating shafts, a second pulley rotatably mounted on a connecting frame, a motor mounted on the connecting frame, a first pulley mounted at the output end of the motor, and a belt that passes between the first pulley, the second pulley, and the two third pulleys, with the belt respectively mounted on the upper and lower parts of the two third pulleys.

[0011] Preferably, the limiting mechanism includes a base plate on the connecting frame, a cover plate on the base plate, a first mounting rod on the rear support leg, a pressure plate rotatably mounted on the first mounting rod, and an adjustment mechanism for adjusting the tilt angle of the pressure plate. The bottom of the base plate has a discharge port, and a discharge guide plate is provided at the discharge port.

[0012] Preferably, the pressure plate has two upwardly recessed grooves, which are located above the threshing cylinder.

[0013] Preferably, the adjustment mechanism includes a bracket mounted on the base plate, a shift paddle rotatably mounted on the bracket, a shift lever connected to the shift paddle, a sliding rod mounted on the base plate, a lifting plate slidably mounted on the sliding rod, a first elastic element sleeved on the outer periphery of the sliding rod and connected at both ends to the base plate and the lifting plate respectively, a screw mounted on the pressure plate, a limiting nut threaded to the top of the screw, a second elastic element sleeved on the outer periphery of the screw and connected at both ends to the pressure plate and the lifting plate respectively, a second mounting rod mounted on the base plate, and a shift pressure block rotatably mounted on the second mounting rod. The shift pressure block has a hook hole, the shift paddle has a hook portion that hooks into the hook hole, and the lifting plate has a movable hole through which the screw passes. The cover plate has a shift groove for the shift lever to engage.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects:

[0015] This invention allows for height adjustment during use. The first and second lower support legs are unfolded, aligning the first lower support leg with the rear support leg and the second lower support leg with the front support leg. The rear support leg is then connected to the first lower support leg, and the front and second lower support legs are also connected. After connection, the top of the rear support leg side is higher than the top of the front support leg side, facilitating the addition of corn cobs to be threshed from the higher end of the threshing space. When packaging, transporting, or not using the thresher, the lower support legs can be folded to lower the height, reducing space requirements and facilitating packaging, transport, and storage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention when the lower support leg is extended outward;

[0017] Figure 2 This is a schematic diagram of the structure of the present invention when the lower support leg is folded inward;

[0018] Figure 3 This is a schematic diagram showing the first lower support leg gradually flipping from an unfolded state to a folded state.

[0019] Figure 4 This is a partial structural schematic diagram of an embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram showing the distribution of the threshing ribs in an embodiment of this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the base plate in an embodiment of this utility model.

[0022] Reference numerals: 1. Rear support leg; 2. First lower support leg; 201. First notch; 3. Front support leg; 4. Second lower support leg; 5. Wheel; 6. Motor; 7. First pulley; 8. Belt; 9. Second pulley; 10. Third pulley; 11. Threshing cylinder; 12. Rotating shaft; 13. First threshing rib; 14. Second threshing rib; 15. Base plate; 151. Discharge port; 16. Cover plate; 161. Shift groove; 17. First mounting rod; 18. Pressure plate; 19. Bracket; 20. Shift lever; 21. Shift paddle; 22. Shift pressure block; 221. Hook hole; 23. Second mounting rod; 24. Lifting plate; 25. Sliding rod; 26. First elastic element; 27. Screw; 28. Second elastic element; 29. ​​Connecting frame; 30. First bolt; 31. Second bolt. Detailed Implementation

[0023] Example 1

[0024] like Figures 1-6 As shown in the figure, the height-adjustable threshing machine proposed in this embodiment includes a mounting frame and a threshing mechanism. The mounting frame itself can be height-adjusted by folding and unfolding.

[0025] The mounting bracket includes a connecting frame 29, two rear support legs 1 arranged side-by-side at the rear end of the connecting frame 29, two front support legs 3 arranged side-by-side at the front end of the connecting frame 29, a first lower support leg 2 detachably disposed below the rear support legs 1, and a second lower support leg 4 detachably disposed below the front support legs 3. The first lower support leg 2 can be installed onto and removed from the rear support legs 1, and can also rotate on the rear support legs 1. The second lower support leg 4 can be installed onto and removed from the front support legs 3, and can also rotate on the front support legs 3. The length of the first lower support leg 2 is greater than the length of the second lower support leg 4. The lower part of the rear support leg 1 and the front support leg 3 both have a first limiting hole and a first rotating hole that is lower than the height of the first limiting hole. The first lower support leg 2 and the second lower support leg 4 both have a second limiting hole corresponding to the first limiting hole and a second rotating hole corresponding to the first rotating hole. The first rotating hole and the second rotating hole are coaxially distributed and a first bolt 30 is inserted through them. When the rear support leg 1 and the first lower support leg 2, as well as the front support leg 3 and the second lower support leg 4, are all inserted through the rotating hole only, the first lower support leg 2 can rotate inward or outward around the rotating hole, and the second lower support leg 4 can rotate inward or outward around the rotating hole.

[0026] like Figures 1-3 As shown, when the first lower support leg 2 and the second lower support leg 4 are extended outwards, the first and second limiting holes are coaxial and a second bolt 31 is inserted through them. Both the first bolt 30 and the second bolt 31 are threaded with nuts. The first lower support leg 2 and the rear support leg 1 are securely connected, and the second lower support leg 4 and the front support leg 3 are securely connected, thus raising the overall height of the threshing machine. Before folding the first lower support leg 2 and the second lower support leg 4 inwards, the second bolt 31 needs to be removed, leaving the first bolt 30. Folding the lower support leg inwards around the rotating hole lowers the overall height of the threshing machine. At this time, the first lower support leg 2 and the second lower support leg 4 provide support for the threshing machine. The entire threshing machine can be adjusted to two different heights.

[0027] The threshing mechanism is mounted on a mounting frame and includes two threshing components arranged side-by-side at an angle, a limiting mechanism for adjusting the size of the threshing space formed between the components, and a drive assembly for driving the two components to rotate in opposite directions. The threshing space is located at the higher end of the threshing components, where corn cobs to be threshed are added. Furthermore, a feed hopper can be added to the feed end, extending outwards to facilitate the insertion of corn cobs, which slide into the feed end along the hopper.

[0028] In this embodiment, the height is adjusted during use by unfolding the first lower support leg 2 and the second lower support leg 4, making the first lower support leg 2 flush with the rear support leg 1 and the second lower support leg 4 flush with the front support leg 3. A first bolt 30 passes through the first and second rotating holes, and a second bolt 31 passes through the first and second limiting holes. Bolts are inserted at both locations to connect the rear support leg 1 and the first lower support leg 2, and to connect the front support leg 3 and the second lower support leg 4. After connection, the top of the side containing the rear support leg 1 is higher than the top of the side containing the front support leg 3, facilitating the addition of corn cobs to be threshed from the higher end of the threshing space. When packaging, transporting, or not using the thresher, the height is lowered by folding the lower support legs, reducing the space occupied and facilitating packaging, transport, and storage.

[0029] Example 2

[0030] like Figures 1-6 As shown, this embodiment proposes a height-adjustable threshing machine. Compared to Embodiment 1, in this embodiment, both the first lower support leg 2 and the second lower support leg 4 are U-shaped plate structures. The first lower support leg 2 has a first notch 201, and the second lower support leg 4 has a second notch. The distance from the first bolt 30 on the rear support leg 1 to one corner of the bottom outer end of the rear support leg 1 is less than the distance to both ends of the first notch 201 along its length. Similarly, the distance from the first bolt 30 on the front support leg 3 to one corner of the bottom outer end of the front support leg 3 is less than the distance to both ends of the second notch along its length. During the rotation of the lower support legs, the notch design prevents interference between the first lower support leg 2 and the rear support leg 1, and between the second lower support leg 4 and the front support leg 3. When the first lower support leg 2 and the second lower support leg 4 are extended, the first lower support leg 2 fits against the side of the rear support leg 1, and the second lower support leg 4 fits against the side of the front support leg 3. The first limiting hole and the second limiting hole are aligned, facilitating the insertion of the second bolt 31 for a secure connection.

[0031] To facilitate the movement of this threshing machine, wheels 5 are provided at the bottom of the first lower support leg 2.

[0032] Example 3

[0033] like Figures 1-6 As shown in this embodiment, a height-adjustable threshing machine is proposed. Compared to Embodiment 1, in this embodiment, the threshing components include a rotating shaft 12 tilted and rotatably mounted on a connecting frame 29, a threshing cylinder 11 coaxially mounted on the rotating shaft 12, and a first threshing rib 13 and a second threshing rib 14 disposed on the circumference of the threshing cylinder 11. The first threshing rib 13 is spirally arranged on the circumference of the lower half or the lower third of the threshing cylinder 11, and the second threshing rib 14 is spirally arranged on the outer periphery of the threshing cylinder 11 and the first threshing rib 13. The two threshing components are symmetrically distributed, with a gap between them for the corn kernels to fall. The first threshing rib 13 and the second threshing rib 14 can work together to effectively thresh the corn cobs.

[0034] like Figure 2 and Figure 5 As shown, the drive assembly includes a third pulley 10 mounted on each of two rotating shafts 12, a second pulley 9 rotatably mounted on a connecting frame 29, a motor 6 mounted on the connecting frame 29, a first pulley 7 mounted at the output end of the motor 6, and a belt 8 passing through the first pulley 7, the second pulley 9, and the two third pulleys 10. The belt 8 is respectively fitted onto the upper and lower parts of the two third pulleys 10. When the motor 6 is running, it drives the first pulley 7 to rotate. The first pulley 7 drives the second pulley 9 and the third pulley 10 to rotate via the belt 8. The rotation directions of the two third pulleys 10 are opposite, so the rotation directions of the two threshing cylinders 11 are opposite, both rotating towards the upper area between the two threshing cylinders 11, and threshing the corn cobs through the threshing ribs.

[0035] like Figure 1 , Figure 2 and Figure 6 As shown, the limiting mechanism includes a base plate 15 mounted on the connecting frame 29, a cover plate 16 mounted on the base plate 15, a first mounting rod 17 mounted on the rear support leg 1, a pressure plate 18 rotatably mounted on the first mounting rod 17, and an adjustment mechanism for adjusting the tilt angle of the pressure plate 18. The size of the threshing space is adjusted by adjusting the tilt angle of the pressure plate 18 through the adjustment mechanism. The bottom of the base plate 15 has a discharge port 151, and a discharge guide plate is provided at the discharge port 151. After the corn cobs are threshed, the corn kernels fall onto the base plate 15, slide down the base plate 15, and are finally discharged from the discharge guide plate. The threshed corn cobs will be discharged from the lower end of the threshing space. The vibration generated by the threshing machine itself during operation also facilitates the sliding of the corn kernels.

[0036] like Figure 4 As shown, the pressure plate 18 has two upwardly recessed grooves, which are located above the threshing cylinder 11. The area formed between the grooves and the threshing cylinder 11 allows the corn cobs to move, so as to effectively thresh the corn.

[0037] Example 4

[0038] like Figures 1-6As shown, this embodiment of the height-adjustable threshing machine, compared to Embodiment 3, includes an adjustment mechanism comprising a bracket 19 mounted on a base plate 15, a shift paddle 21 rotatably mounted on the bracket 19, a shift lever 20 connected to the shift paddle 21, a sliding rod 25 mounted on the base plate 15, a lifting plate 24 slidably mounted on the sliding rod 25, a first elastic element 26 sleeved around the outer periphery of the sliding rod 25 and connected at both ends to the base plate 15 and the lifting plate 24 respectively, and a screw mounted on the pressure plate 18. The system includes a rod 27, a limiting nut threaded to the top of the rod 27, a second elastic element 28 sleeved on the outer circumference of the rod 27 and connected at both ends to the pressure plate 18 and the lifting plate 24 respectively, a second mounting rod 23 mounted on the base plate 15, and a shifting block 22 rotatably mounted on the second mounting rod 23. The shifting block 22 has a hook hole 221, and the shifting paddle 21 has a hook portion that hooks into the hook hole 221. The lifting plate 24 has a movable hole through which the rod 27 passes. The diameter of the movable hole is larger than the diameter of the rod 27 but smaller than the size of the limiting nut. The cover plate 16 has a shifting groove 161 for the shifting lever 20 to be engaged. The shifting groove 161 includes a moving channel and a locking channel. The locking channels are V-shaped and multiple are arranged side by side along the length of the moving channel. The locking channels are connected to the moving channel. Shifting is achieved by adjusting the shifting lever 20 to be engaged in different locking channels.

[0039] In this embodiment, during gear shifting, the shift lever 20 is first moved away from one locking channel on the shift groove 161, then moved within the moving channel, and finally locked into another locking channel to achieve gear shifting. During gear shifting, the shift lever 20 drives the shift pressure block 22 to rotate around the second mounting rod 23 via the shift paddle 21. The shift pressure block 22 presses against the lifting plate 24, and the first elastic element 26 is in a compressed state. The height of the lower part of the pressure plate 18 is lowered by the screw 27, the limit nut, and the second elastic element 28. The upper part of the pressure plate 18 rotates around the first mounting rod 17, thereby increasing the tilt angle of the pressure plate 18 and reducing the size between the threshing cylinder 11 and the pressure plate 18, thus making it suitable for threshing smaller-sized corn. If it is to be used for threshing larger-sized corn, the shift lever 20 is rotated in the opposite direction to shift gears.

[0040] By adjusting the locking channels of the shift lever 20 at different positions on the shift groove 161, the tilt angle of the pressure plate 18 and the distance between the pressure plate 18 and the threshing cylinder 11 can be adjusted, thus making it suitable for threshing corn cobs of different sizes and having a wide range of applications.

[0041] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A height-adjustable threshing machine, characterized in that, include: The mounting bracket includes a connecting frame (29), two rear support legs (1) arranged side by side at the rear end of the connecting frame (29), two front support legs (3) arranged side by side at the front end of the connecting frame (29), a first lower support leg (2) detachably arranged at the lower part of the rear support leg (1), and a second lower support leg (4) detachably arranged at the lower part of the front support leg (3). The lower parts of the rear support leg (1) and the front support leg (3) each have a first limiting hole and a first rotating hole lower than the height of the first limiting hole. The first lower support leg (2) and the second lower support leg (4) each have a second limiting hole corresponding to the first limiting hole and a second rotating hole corresponding to the first rotating hole. The first rotating hole and the second rotating hole are coaxially distributed and a first bolt (30) is inserted through them. When the first lower support leg (2) and the second lower support leg (4) are unfolded, the first limiting hole and the second limiting hole are coaxial and a second bolt (31) is inserted through them. The first bolt (30) and the second bolt (31) are both threaded with nuts. The threshing mechanism is mounted on the mounting frame.

2. The height-adjustable threshing machine according to claim 1, characterized in that, Both the first lower support leg (2) and the second lower support leg (4) are U-shaped plate structures. The first lower support leg (2) has a first notch (201), and the second lower support leg (4) has a second notch. When the first lower support leg (2) and the second lower support leg (4) are deployed, the first lower support leg (2) is attached to the side of the rear support leg (1), and the second lower support leg (4) is attached to the side of the front support leg (3).

3. The height-adjustable threshing machine according to claim 1, characterized in that, The bottom of the first lower support leg (2) is equipped with wheels (5).

4. The height-adjustable threshing machine according to claim 1, characterized in that, The threshing mechanism includes two threshing elements arranged side by side at an angle, a limiting mechanism for adjusting the size of the threshing space formed between the threshing elements, and a drive assembly for driving the two threshing elements to rotate in opposite directions.

5. A height-adjustable threshing machine according to claim 4, characterized in that, The threshing unit includes a rotating shaft (12) that is tilted and rotatably mounted on a connecting frame (29), a threshing cylinder (11) that is coaxially mounted on the rotating shaft (12), and a first threshing rib (13) and a second threshing rib (14) that are mounted on the circumference of the threshing cylinder (11). The first threshing rib (13) is spirally mounted on the circumference of the lower half or the lower third of the threshing cylinder (11), and the second threshing rib (14) is spirally mounted on the outer circumference of the threshing cylinder (11) and the first threshing rib (13).

6. A height-adjustable threshing machine according to claim 4, characterized in that, The drive assembly includes a third pulley (10) on each of the two rotating shafts (12), a second pulley (9) rotatably mounted on the connecting frame (29), a motor (6) mounted on the connecting frame (29), a first pulley (7) mounted on the output end of the motor (6), and a belt (8) that passes between the first pulley (7), the second pulley (9), and the two third pulleys (10). The belt (8) is respectively mounted on the upper and lower parts of the two third pulleys (10).

7. A height-adjustable threshing machine according to claim 4, characterized in that, The limiting mechanism includes a base plate (15) on the connecting frame (29), a cover plate (16) on the base plate (15), a first mounting rod (17) on the rear support leg (1), a pressure plate (18) rotatably mounted on the first mounting rod (17), and an adjustment mechanism for adjusting the tilt angle of the pressure plate (18). The bottom of the base plate (15) has a discharge port (151), and a discharge guide plate is provided at the discharge port (151).

8. A height-adjustable threshing machine according to claim 7, characterized in that, The pressure plate (18) has two upwardly recessed grooves, which are located above the threshing cylinder (11).

9. A height-adjustable threshing machine according to claim 7, characterized in that, The adjustment mechanism includes a bracket (19) mounted on a base plate (15), a shift paddle (21) rotatably mounted on the bracket (19), a shift lever (20) connected to the shift paddle (21), a sliding rod (25) mounted on the base plate (15), a lifting plate (24) slidably mounted on the sliding rod (25), a first elastic element (26) sleeved on the outer periphery of the sliding rod (25) and connected at both ends to the base plate (15) and the lifting plate (24) respectively, a screw (27) mounted on a pressure plate (18), and a limiter threaded to the top of the screw (27). The system includes a nut, a second elastic element (28) sleeved on the outer periphery of the screw (27) and connected at both ends to the pressure plate (18) and the lifting plate (24) respectively, a second mounting rod (23) set on the base plate (15), and a shifting block (22) rotatably set on the second mounting rod (23). The shifting block (22) has a hook hole (221), the shifting paddle (21) has a hook part that hooks into the hook hole (221), the lifting plate (24) has a movable hole through which the screw (27) passes; and the cover plate (16) has a shifting groove (161) into which the shifting lever (20) is inserted.

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