Corn harvester header reel with overload protection

Abstract

The utility model relates to a corn harvesting header flail device with overload protection belongs to agricultural machinery technical field. Technical scheme is: the output shaft end is connected through flail seat spline cover and the inner cover of deep groove ball bearing two, the outer cover of deep groove ball bearing two is connected with flail fixed base, and the flail is installed on the flail fixed base, the annular clutch piece, annular clutch pressure plate and annular disc spring one are pressed and assembled in the outer of deep groove ball bearing two by disc spring gland, the clutch piece is equipped on the clutch pressure plate, the lower end of deep groove ball bearing two and flail seat spline cover lower end all match with clutch piece, and disc spring one provides the compression force, and the power of output shaft is transmitted to flail fixed base, and the whole constitutes normally closed overload protection clutch. The utility model avoids high torque impact through normally closed overload protection clutch when many impurities invade and meet hard objects, when flail seat hits hard objects, clutch piece skids, can timely disperse impact force, avoids the failure such as bevel gear and flail damage.

Description

Technical Field

[0001] This utility model relates to a corn harvesting header blade device with overload protection, belonging to the field of agricultural machinery technology. Background Technology

[0002] In shredding equipment, the shovel cutter is mainly used to cut fibrous materials such as crop stalks. The shovel cutter typically uses serrated blades, mounted on the auger blades or drive shaft, and achieves its shredding function through high-speed rotation. The shovel cutter generates relative motion with the material through high-speed rotation, utilizing the cooperation of the moving blade and the fixed blade (or auger) to cut the stalks and other materials into smaller fragments. For example, in a corn stalk shredder, while the auger conveys the material, the shovel cutter rotates synchronously to complete the crushing and spreading actions, achieving continuous operation. In the field of mechanized corn harvesting, the shovel cutter header, due to its strong stalk crushing ability and anti-clogging characteristics, has become a core device for whole-plant corn harvesting and stalk return operations. Examples include Chinese patent applications CN202422284487.2 ("A Corn Header with Shovel Cutter Structure") and CN202423197310.5 ("A Hydraulic Shovel Cutter Corn Header"). Currently, existing corn harvesting header blade devices are prone to damage when multiple impurities intrude or encounter hard objects due to the lack of overload protection. The blades are subjected to high torque impacts, resulting in low transmission efficiency and unstable operating conditions. Utility Model Content

[0003] The purpose of this invention is to provide a corn harvesting header blade device with overload protection. When multiple impurities intrude or encounter hard objects, a normally closed overload protection clutch prevents high torque impact. When the blade holder hits a hard object, the clutch plate slips, thereby dispersing the impact force in time and avoiding malfunctions such as damage to the bevel gear and blade. It operates stably under variable load conditions and has reliable performance, solving the above-mentioned technical problems existing in the prior art.

[0004] The technical solution of this utility model is: a corn harvesting header blade device with overload protection, comprising a housing, an input shaft, an output shaft, a deep groove ball bearing, a bevel gear, a spiral bevel gear, a tapered roller bearing, a blade, a blade holder spline sleeve, a blade fixing seat, a disc spring cover, a clutch plate, a clutch pressure plate, a second deep groove ball bearing, and a first disc spring; the housing contains the input shaft, the output shaft, the first deep groove ball bearing, the bevel gear, the spiral bevel gear, and the tapered roller bearing. The two ends of the input shaft are respectively mounted on the left and right sides of the first deep groove ball bearing. The input shaft has a bevel gear meshing with the spiral bevel gear, which is connected to the output shaft via a tapered roller bearing. The end of the output shaft is connected to the inner sleeve of the second deep groove ball bearing via a blade holder spline sleeve. The outer sleeve of ball bearing two is connected to the cutter holder, on which the cutter is mounted. A clutch plate, clutch pressure plate, and disc spring one are sequentially arranged outside the center of the cutter holder. The disc spring cover presses the annular clutch plate, annular clutch pressure plate, and annular disc spring one onto the outer surface of deep groove ball bearing two. A clutch plate is mounted on the clutch pressure plate. The lower end of deep groove ball bearing two and the lower end of the splined sleeve of the cutter holder are both matched with the clutch plate. Disc spring one provides clamping force, transmitting power from the output shaft to the cutter holder. The entire assembly constitutes a normally closed overload protection clutch. When the cutter holder collides with a hard object or experiences a sudden load change, the clutch plate, through its slippage characteristic, cuts off the power transmission between the output shaft and the cutter holder, preventing damage to core components such as gears and shafts inside the transmission box due to overload.

[0005] Furthermore, two sling cutters are symmetrically installed at both ends of the sling cutter fixing base. A disc spring is installed between the bottom of the sling cutter and the sling cutter fixing base. When the sling cutter encounters a hard object, the blade of the sling cutter can rotate at a certain angle due to the torsional action of the disc spring, thus avoiding damage to the sling cutter. Moreover, each sling cutter has cutting edges on both sides of its blade. When one edge becomes worn and dull, the sling cutter can be disassembled and reversed for installation, allowing the other sharp edge to be used for continued operation. This maximizes the utilization rate of the tool material and reduces maintenance and replacement costs.

[0006] Furthermore, the housing is an integral unit with a T-shaped exterior; the deep groove ball bearings at both ends of the input shaft are respectively located on the left and right sides of the housing and are horizontally positioned; each of the deep groove ball bearings on the left and right sides of the housing is equipped with a skeleton oil seal and an oil seal cover.

[0007] Furthermore, the output shaft is disposed inside the bearing sleeve, and the upper and lower ends of the bearing sleeve are respectively connected to corresponding tapered roller bearings. The output shaft is supported on the housing by two tapered roller bearings.

[0008] The beneficial effects of this utility model are as follows: the blade assembly is arranged on the cutting table. When multiple impurities invade or encounter hard objects, the normally closed overload protection clutch avoids high torque impact. When the blade holder hits a hard object, the clutch plate slips, thereby dispersing the impact force in time and avoiding failures such as damage to the bevel gear and blade. It can operate stably under variable load conditions and has reliable performance. Attached Figure Description

[0009] Figure 1 This is an isometric schematic diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present utility model; Figure 3 This is a schematic diagram of the internal transmission structure of an embodiment of the present utility model; Figure 4 This is an exploded view of the components in an embodiment of the present utility model; Figure 5 This is a cross-sectional view of an embodiment of the present utility model; In the diagram: 1. Housing; 2. Input shaft; 3. Bearing sleeve; 4. Output shaft; 5. Deep groove ball bearing (I); 6. Input spiral bevel gear; 7. Output spiral bevel gear; 8. Tapered roller bearing; 9. Throwing cutter; 10. Throwing cutter holder spline sleeve; 11. Throwing cutter holder; 12. Disc spring cover; 13. Clutch plate; 14. Deep groove ball bearing (II); 15. Skeleton oil seal (I); 16. Disc spring (I); 17. O-ring rubber outer seal; 18. Throwing cutter cover; 19. O-ring rubber inner seal; 20. Adjusting shim; 21. Throwing cutter cap; 22. Disc spring (II); 23. Sealing ring; 24. Thrust ball bearing; 25. Skeleton oil seal (II); 26. Detailed Implementation

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] See attached document Figures 1-5A corn harvesting header blade device with overload protection includes a housing 1, an input shaft 2, an output shaft 4, a deep groove ball bearing 5, a bevel gear 6, a spiral bevel gear 7, a tapered roller bearing 8, a blade 9, a blade holder spline sleeve 10, a blade fixing seat 11, a disc spring cover 12, a clutch plate 13, a clutch pressure plate 14, a second deep groove ball bearing 15, and a first disc spring 17. The housing 1 houses the input shaft 2, output shaft 4, deep groove ball bearing 5, bevel gear 6, spiral bevel gear 7, and tapered roller bearing 8. The two ends of the input shaft 2 are respectively mounted on two deep groove ball bearings 5 ​​on the left and right sides. The input shaft 2 has a bevel gear 6 that meshes with the spiral bevel gear 7. The spiral bevel gear 7 is connected to the output shaft 4 via the tapered roller bearing 8. The end of the output shaft 4 is connected to the inner sleeve of the second deep groove ball bearing 15 via the blade holder spline sleeve 10. The outer sleeve of the second deep groove ball bearing 15... The sleeve is connected to the cutter holder 11, and the cutter 9 is installed on the cutter holder 11. The center of the cutter holder 11 is provided with a clutch plate 13, a clutch pressure plate 14 and a disc spring 17. The disc spring cover 12 presses the annular clutch plate 13, the annular clutch pressure plate 14 and the annular disc spring 17 onto the outside of the deep groove ball bearing 15. The clutch pressure plate 14 is provided with a clutch plate 13. The lower end of the deep groove ball bearing 15 and the lower end of the cutter holder spline sleeve 10 are matched with the clutch plate 13. The disc spring 17 provides clamping force to transmit the power of the output shaft 4 to the cutter holder 11. The whole structure constitutes a normally closed overload protection clutch. When the cutter holder 11 hits a hard object or the load changes suddenly, the clutch plate 13 cuts off the power transmission between the output shaft 4 and the cutter holder 11 through its slipping characteristics, so as to avoid damage to the core components such as gears and shafts inside the transmission box due to overload.

[0012] Two blades 9 are symmetrically installed at both ends of the blade fixing base 11. A disc spring 23 is installed between the bottom of the blade 9 and the blade fixing base 11. When the blade 9 encounters a hard object, the blade body of the blade 9 can rotate at a certain angle due to the torsional action of the disc spring 23, thus avoiding damage to the blade 9. Furthermore, each blade 9 has a cutting edge on both sides of its blade body. When one edge becomes worn and dull, the blade 9 can be disassembled and reversed for installation, allowing the other sharp edge to be used for continued operation. This maximizes the utilization rate of the tool material and reduces maintenance and replacement costs.

[0013] See attached document Figure 1 and 3 The housing 1 is an integral unit with a T-shaped shape. The deep groove ball bearings 5 ​​at both ends of the input shaft 2 are respectively located on the left and right sides of the housing 1 and are horizontally arranged. The deep groove ball bearings 5 ​​on the left and right sides of the housing 1 are each equipped with a skeleton oil seal 26 and an oil seal cover.

[0014] See attached document Figure 2- 3, The output shaft 4 is installed in the bearing sleeve 3. The upper and lower ends of the bearing sleeve 3 are respectively equipped with tapered roller bearings 8. The output shaft 4 is supported on the housing 1 by two tapered roller bearings 8. The tapered roller bearings 8 arranged at the upper and lower points form a stable support system, which effectively suppresses shaft shaking and ensures smooth transmission.

[0015] See attached document Figure 4 The blade fixing seat 11 is strip-shaped, with blades 9 fixedly connected to both ends, and is vertically arranged with the output shaft 4.

[0016] See attached document Figure 4 The splined sleeve 10 of the cutter holder is installed in the cutter fixing seat 11 via a deep groove ball bearing 15, enabling relative rotation between the output shaft 4 and the cutter fixing seat 11. A clutch plate 13 is provided on the clutch pressure plate 14. The lower ends of the deep groove ball bearing 15 and the cutter holder splined sleeve 10 match the clutch plate 13. A disc spring 17 provides clamping force, transmitting power from the output shaft 4 to the cutter fixing seat 11, forming a normally closed overload protection clutch. When the cutter fixing seat 11 impacts a hard object or experiences a sudden load change, the clutch plate 13, through its slippage characteristic, cuts off the power transmission between the output shaft 4 and the cutter fixing seat 11, preventing damage to core components such as gears and shafts inside the transmission box due to overload. The entire normally closed overload protection clutch is secured to the lower end of the output shaft 4 by bolts via the outermost disc spring cover 12, greatly improving the reliability and durability of the entire machine.

[0017] See attached document Figure 5 The tapered roller bearing 8 located at the lower end is provided with a skeleton oil seal 16. The thrust ball bearing 25 is disposed between the deep groove ball bearing 15 and the skeleton oil seal 16. The disc spring 17 provides an upward clamping force, which acts on the clutch pressure plate 14. The clutch pressure plate 14 provides an upward pressure, which acts on the cutter fixing seat 11. The cutter fixing seat 11 provides an upward pressure through the thrust ball bearing 25, which acts on the cutter seat spline sleeve 10, so that the cutter fixing seat 11 is firmly fixed on the cutter seat spline sleeve 10, and the service life of the deep groove ball bearing 15 is extended.

[0018] See attached document Figure 4 The clutch disc 13 and the clutch pressure plate 14 are provided with an outer O-ring rubber seal 18 and an inner O-ring rubber seal 20; the clutch pressure plate 14 and the disc spring 17 are provided with a seal 24; and the disc spring 17 and the disc spring cover 12 are provided with an adjusting shim 21.

[0019] See attached document Figure 4 The blade 9 is fixed to the blade fixing seat 11 by the upper and lower matching blade pressure caps 22 and blade pressure covers 19.

Claims

1. A corn harvester header thrower device having overload protection, characterized by: The assembly includes a housing (1), an input shaft (2), an output shaft (4), a deep groove ball bearing (5), a bevel gear (6), a spiral bevel gear (7), a tapered roller bearing (8), a cutter (9), a cutter holder spline sleeve (10), a cutter fixing seat (11), a disc spring cover (12), a clutch disc (13), a clutch pressure plate (14), a deep groove ball bearing (2) (15), and a disc spring (17). The housing (1) is equipped with an input shaft (2), an output shaft (4), a deep groove ball bearing (5), a bevel gear (6), a spiral bevel gear (7), and a tapered roller bearing (8). The two ends of the input shaft (2) are respectively mounted on two deep groove ball bearings (5) on the left and right sides. The input shaft (2) is equipped with a bevel gear (6) that meshes with the spiral bevel gear (7). The spiral bevel gear (7) is connected to the output shaft (4) through the tapered roller bearing (8). The output shaft (4) is located at the end of the... The part is connected to the inner sleeve of the deep groove ball bearing II (15) through the spline sleeve (10) of the cutter holder. The outer sleeve of the deep groove ball bearing II (15) is connected to the cutter fixing seat (11). The cutter (9) is installed on the cutter fixing seat (11). The center of the cutter fixing seat (11) is provided with a clutch plate (13), a clutch pressure plate (14) and a disc spring I (17). The disc spring cover (12) presses the annular clutch plate (13), the annular clutch pressure plate (14) and the annular disc spring I (17) onto the outside of the deep groove ball bearing II (15). The clutch pressure plate (14) is provided with a clutch plate (13). The lower end of the deep groove ball bearing II (15) and the lower end of the spline sleeve (10) of the cutter holder are matched with the clutch plate (13). The disc spring I (17) provides the clamping force to transmit the power of the output shaft (4) to the cutter fixing seat (11). The whole is a normally closed overload protection clutch.

2. The corn harvesting header blade device with overload protection according to claim 1, characterized in that: Two blades (9) are symmetrically installed at both ends of the blade fixing base (11), and a disc spring (23) is provided between the lower part of the blade (9) and the blade fixing base (11).

3. A corn harvester head throw-off device with overload protection according to claim 1 or 2, characterized in that: The housing (1) is an integral type, and the housing (1) is T-shaped. The deep groove ball bearings (5) at both ends of the input shaft (2) are respectively set on the left and right sides of the housing (1) and are set horizontally. The deep groove ball bearings (5) on the left and right sides of the housing (1) are each equipped with a skeleton oil seal (26) and an oil seal cover.

4. A corn harvester head throw-off device having overload protection as defined in claim 3, wherein: The output shaft (4) is set inside the bearing sleeve (3). The upper and lower ends of the bearing sleeve (3) are respectively connected to the corresponding tapered roller bearings (8). The output shaft (4) is supported on the housing (1) by two tapered roller bearings (8).

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