Gearbox of corn harvesting header

Abstract

The utility model relates to a corn harvesting header gearbox, and belongs to the technical field of gearboxes. According to the technical scheme, the two ends of a main shaft (2) are connected with a gearbox shell (1) through bearing assemblies, a double-face spiral bevel gear (4) is connected with the main shaft (2) through an elastic protection slip body (3), and one end of a left stem pulling gear (5) and one end of a right stem pulling gear (6) are fixedly connected with the front end of the gearbox shell (1) through corresponding bearing sleeve assemblies respectively. Spiral bevel tooth surfaces at the other ends of the left stem pulling gear (5) and the right stem pulling gear (6) are respectively meshed and connected with a double-sided spiral bevel gear; a left ear picking chain shaft and a right ear picking chain shaft are respectively arranged at two ends of the box body and are respectively meshed and connected with the main shaft through a left ear picking gear set and a right ear picking gear set. According to the utility model, the power transmission efficiency is higher, and the power loss is reduced to a great extent; the transmission structure is simpler and more convenient, and the manufacturing cost is saved.

Description

Technical Field

[0001] The utility model relates to a gearbox for a corn harvesting cutter bar, belonging to the technical field of gearboxes. Background Art

[0002] The corn harvesting cutter bar is a corn harvesting machine, powered by a corn harvesting locomotive. The cutter bar cuts the corn straws into pieces and conveys the ears to the feeding device of the locomotive. At present, there are various types of gearboxes for corn harvesting cutter bars in China. In some transmission devices, the main shaft and the transmission shaft are two separate structures, which are connected by a chain, making the transmission system cumbersome and complex, resulting in increased difficulty in repairing the transmission device or replacing parts. In some other cases, the power is transmitted from the main shaft to the driven gear and then to the harvesting device, resulting in inefficient use of power. Moreover, neither of them has a protection function. When a blockage occurs during operation, it will cause problems such as broken parts and damaged boxes, resulting in the inability of the harvesting cutter bar to operate normally. Therefore, on the basis of ensuring the functions of the transmission device remain unchanged, designing a gearbox with strong practicability, convenient maintenance, high transmission efficiency and a protection function is an urgent problem to be solved. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a gearbox for a corn harvesting cutter bar, which simultaneously transmits power to two working shafts (the stalk pulling gear shaft and the ear picking chain shaft) through a transmission shaft (main shaft), improving the power transmission efficiency and solving the problems existing in the background art.

[0004] The technical solution of the utility model is as follows:

[0005] A gearbox for a corn harvesting cutter bar includes a gearbox housing, a main shaft, an elastic protection slipping body, a double-sided spiral bevel gear, a left stalk pulling gear, a right stalk pulling gear, a left ear picking chain shaft, a right ear picking chain shaft, a left ear picking gear set and a right ear picking gear set. Both ends of the main shaft are respectively connected to the gearbox housing through corresponding bearing assemblies. The double-sided spiral bevel gear is connected to the main shaft through the elastic protection slipping body. One end of the left stalk pulling gear and the right stalk pulling gear are respectively fixedly connected to the front end of the gearbox housing through corresponding bearing sleeve assemblies. The axes of the left stalk pulling gear and the right stalk pulling gear are perpendicular to the axis of the main shaft in the same plane. The spiral bevel gear surfaces at the other ends of the left stalk pulling gear and the right stalk pulling gear are respectively meshed and connected to the double-sided spiral bevel gear. The left ear picking chain shaft and the right ear picking chain shaft are respectively arranged at both ends of the gearbox housing, and the left ear picking chain shaft and the right ear picking chain shaft are respectively meshed and connected to the left and right ends of the main shaft through the left ear picking gear set and the right ear picking gear set.

[0006] Further, an external spline is provided in the middle of the main shaft, which is meshed and connected with an internal spline that elastically protects against slipping. The outer end of the elastic protection slipping body is connected to the internal tooth surface of the double-sided spiral bevel gear through an elastic pin. One end of the double-sided spiral bevel gear is connected to the inner ring of the first bearing through the first bearing bushing, and the first bearing is fixedly installed on the transmission housing. The other end of the double-sided spiral bevel gear is connected to the outer ring of the second bearing through the second bearing bushing, and the second bearing is fixedly installed on the main shaft through a spline sleeve.

[0007] Further, the left ear-picking gear set is composed of an upper spiral bevel gear one and a lower spiral bevel gear one. The lower spiral bevel gear one is meshed and connected with the external spline at the left end of the main shaft. The upper spiral bevel gear one is meshed and connected with the left ear-picking chain shaft through a spline, and the upper spiral bevel gear one is meshed with the lower spiral bevel gear one; the right ear-picking gear set is composed of an upper spiral bevel gear two and a lower spiral bevel gear two. The lower spiral bevel gear two is meshed and connected with the external spline at the right end of the main shaft. The upper spiral bevel gear two is meshed and connected with the right ear-picking chain shaft through a spline, and the upper spiral bevel gear two is meshed with the lower spiral bevel gear two; the left ear-picking chain shaft and the right ear-picking chain shaft are respectively fixedly connected to the upper end of the transmission housing through corresponding bearing assemblies, and the axes of the left ear-picking chain shaft and the right ear-picking chain shaft are perpendicularly distributed in the same plane as the axis of the main shaft.

[0008] Further, one end of the transmission housing is provided with a detachable side protection cover, and the side protection cover is connected to the transmission housing through bolts.

[0009] Positive effects of the present utility model: The present utility model changes the transmission path of the main shaft in the transmission, directly transmits the power to the working shaft, makes the power transmission efficiency more efficient, and greatly reduces the power loss; moreover, the transmission structure is simpler, saving the manufacturing cost. When the machine is working, if the front ear-picking roller is blocked, the present utility model can greatly reduce the damage of the transmission through the elastic protection slipping body, reduce the maintenance cost, and greatly improve the working efficiency of the corn harvesting cutter bar. Description of the Drawings

[0010] Figure 1 It is the front view of the external structure of the embodiment of the present utility model;

[0011] Figure 2 It is the front view of the internal structure of the embodiment of the present utility model;

[0012] Figure 3 It is the upward view cross-sectional view of the internal structure of the embodiment of the present utility model;

[0013] In the figure: transmission housing 1, main shaft 2, elastic protection slip body 3, double-sided spiral bevel gear 4, left stalk-pulling gear 5, right stalk-pulling gear 6, left ear-picking chain shaft 7, right ear-picking chain shaft 8, upper spiral bevel gear one 9, lower spiral bevel gear one 10, side protection cover 11, elastic pin 12, bearing bushing 13, bearing one 14, bearing two 15, upper spiral bevel gear two 16, lower spiral bevel gear two 17, bearing bushing two 18. Specific implementation mode

[0014] The following further describes the present utility model in conjunction with the accompanying drawings and embodiments:

[0015] Refer to the attached Figures 1-3 In this embodiment, a corn harvesting cutter table transmission is provided, which includes a transmission housing 1, a main shaft 2, an elastic protection slip body 3, a double-sided spiral bevel gear 4, a left stalk-pulling gear 5, a right stalk-pulling gear 6, a left ear-picking chain shaft 7, a right ear-picking chain shaft 8, a left ear-picking gear set and a right ear-picking gear set. Both ends of the main shaft 2 are respectively connected to the transmission housing 1 through corresponding bearing assemblies. The double-sided spiral bevel gear 4 is connected to the main shaft 2 through the elastic protection slip body 3. The upper ends of the left stalk-pulling gear 5 and the right stalk-pulling gear 6 are respectively fixedly connected to the front end of the transmission housing 1 through corresponding bearing sleeve assemblies. The axes of the left stalk-pulling gear 5 and the right stalk-pulling gear 6 are perpendicularly distributed in the same plane as the axis of the main shaft 2. The spiral bevel gear surfaces at the lower ends of the left stalk-pulling gear 5 and the right stalk-pulling gear 6 are respectively meshed and connected to the double-sided spiral bevel gear 4. The left and right ends of the transmission housing 1 are respectively provided with a left ear-picking chain shaft 7 and a right ear-picking chain shaft 8. The left ear-picking chain shaft 7 and the right ear-picking chain shaft 8 are respectively meshed and connected to the left and right ends of the main shaft 2 through the left ear-picking gear set and the right ear-picking gear set.

[0016] In this embodiment, an external spline is provided in the middle of the main shaft 2, which is meshed and connected with the internal spline of the elastic protection slip body 3. The outer end of the elastic protection slip body 3 is connected to the internal tooth surface of the double-sided spiral bevel gear 4 through an elastic pin 12. The slip body is a well-known component in the art. The slip body is connected to the double-sided spiral bevel gear through an elastic pin to provide elastic protection for the double-sided spiral bevel gear. The right end of the double-sided spiral bevel gear 4 is connected to the inner ring of the bearing one 14 through a bearing bushing one 13. The bearing one 14 is fixedly installed on the transmission housing 1. The left end of the double-sided spiral bevel gear 4 is connected to the outer ring of the bearing two 15 through a bearing bushing two 18. The bearing two 15 is fixedly installed on the main shaft 2 through a spline sleeve, and different specifications of bearings can be adapted by replacing the spline sleeve.

[0017] In this embodiment, the left ear - picking gear set is composed of an upper spiral bevel gear 9 and a lower spiral bevel gear 10. The lower spiral bevel gear 10 is meshed and connected with the external spline at the left end of the main shaft 2. The upper spiral bevel gear 9 is meshed and connected with the left ear - picking chain shaft 7 through splines, and the upper spiral bevel gear 9 is meshed with the lower spiral bevel gear 10. The right ear - picking gear set is composed of an upper spiral bevel gear 16 and a lower spiral bevel gear 17. The lower spiral bevel gear 17 is meshed and connected with the external spline at the right end of the main shaft 2. The upper spiral bevel gear 16 is meshed and connected with the right ear - picking chain shaft 8 through splines, and the upper spiral bevel gear 16 is meshed with the lower spiral bevel gear 17. The left ear - picking chain shaft 7 and the right ear - picking chain shaft 8 are respectively fixedly connected to the upper end of the gearbox housing 1 through corresponding bearing assemblies. There are multiple bearing assemblies. The axes of the left ear - picking chain shaft 7 and the right ear - picking chain shaft 8 are vertically distributed in the same plane as the axis of the main shaft 2.

[0018] In this embodiment, an opening is provided at the right end of the gearbox housing 1 and a detachable side protection cover 11 is installed. The side protection cover 11 is connected to the gearbox housing 1 by bolts. Multiple threaded holes for fixedly connecting with other components are provided at the upper and lower ends of the gearbox housing 1.

[0019] The working principle of the present utility model is as follows:

[0020] The main shaft 2 of the cutter bar gearbox receives and transmits power, and at the same time drives the lower spiral bevel gear 10 and the lower spiral bevel gear 17 to rotate synchronously. The lower spiral bevel gear 10 and the lower spiral bevel gear 17 respectively transmit power to the upper spiral bevel gear 9 and the upper spiral bevel gear 16. The upper spiral bevel gear 9 and the upper spiral bevel gear 16 respectively drive the left ear - picking chain shaft 7 and the right ear - picking chain shaft 8 to rotate synchronously, and then the operation of the ear - picking device is realized.

[0021] At the same time, when the main shaft 2 of the cutter bar gearbox rotates, it drives the elastic protection slip body 3 to rotate. The elastic protection slip body 3 is meshed and connected with the double - sided spiral bevel gear 4, thereby driving the double - sided spiral bevel gear 4 to rotate. The left stem - pulling gear 5 and the right stem - pulling gear 6 are vertically meshed and connected with the two - side teeth of the double - sided spiral bevel gear 4, thereby driving the left stem - pulling gear 5 and the right stem - pulling gear 6 to rotate synchronously, and then the operation of the stem - pulling device is realized. The elastic protection slip body 3 can protect the main shaft and the output gear of the stem - pulling roller when the left ear - picking roller and the right ear - picking roller are blocked, effectively avoiding damage to the gearbox, greatly reducing losses, saving costs, and improving the harvesting efficiency.

Claims

1. A corn harvesting header gearbox, characterized in that: The invention comprises a gearbox housing (1), a main shaft (2), an elastic protective sliding body (3), a double-sided spiral bevel gear (4), a left stem pulling gear (5), a right stem pulling gear (6), a left ear picking chain shaft (7), a right ear picking chain shaft (8), a left ear picking gear set and a right ear picking gear set, wherein both ends of the main shaft (2) are connected to the gearbox housing (1) via corresponding bearing assemblies, the double-sided spiral bevel gear (4) is connected to the main shaft (2) via the elastic protective sliding body (3), and one end of the left stem pulling gear (5) and the right stem pulling gear (6) are connected via corresponding bearing sleeves. The assembly is fixedly connected to the front end of the gearbox housing (1); the axes of the left stem pulling gear (5) and the right stem pulling gear (6) are vertically distributed in the same plane as the axis of the main shaft (2); the spiral bevel tooth surfaces at the other ends of the left stem pulling gear (5) and the right stem pulling gear (6) are respectively meshed and connected with the double-sided spiral bevel gear (4); the left ear picking chain shaft (7) and the right ear picking chain shaft (8) are respectively provided at both ends of the gearbox housing (1); the left ear picking chain shaft (7) and the right ear picking chain shaft (8) are respectively meshed and connected with the left and right ends of the main shaft (2) through the left ear picking gear set and the right ear picking gear set.

2. A corn harvesting header gearbox according to claim 1, characterized in that: The main shaft (2) is provided with an external spline in the middle thereof, which is meshedly connected with the internal spline of the elastic protective sliding body (3); the outer end of the elastic protective sliding body (3) is connected to the inner tooth surface of the double-sided spiral bevel gear (4) through an elastic pin (12); one end of the double-sided spiral bevel gear (4) is connected to the inner ring of the first bearing (14) through the first bearing bushing (13); the first bearing (14) is fixedly mounted on the gearbox housing (1); the other end of the double-sided spiral bevel gear (4) is connected to the outer ring of the second bearing (15) through the second bearing bushing (18); the second bearing (15) is fixedly mounted on the main shaft (2) through a spline sleeve.

3. A corn harvesting header gearbox according to claim 1 or 2, characterized in that: The left ear picking gear set is composed of an upper spiral bevel gear 1 (9) and a lower spiral bevel gear 1 (10), the lower spiral bevel gear 1 (10) is meshed with the external spline at the left end of the main shaft (2), the upper spiral bevel gear 1 (9) is meshed with the left ear picking chain shaft (7) through a spline, and the upper spiral bevel gear 1 (9) is meshed with the lower spiral bevel gear 1 (10); the right ear picking gear set is composed of an upper spiral bevel gear 2 (16) and a lower spiral bevel gear 2 (17), the lower spiral bevel gear 2 (1 7) is meshed with an external spline at the right end of the main shaft (2), the upper spiral bevel gear 2 (16) is meshed with the right ear picking chain shaft (8) via a spline, and the upper spiral bevel gear 2 (16) is meshed with the lower spiral bevel gear 2 (17); the left ear picking chain shaft (7) and the right ear picking chain shaft (8) are respectively fixedly connected to the upper end of the gearbox housing (1) via corresponding bearing assemblies, and the axes of the left ear picking chain shaft (7) and the right ear picking chain shaft (8) are vertically distributed in the same plane as the axis of the main shaft (2).

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