Speed reduction reversing box of self-propelled corn harvester

Abstract

The utility model discloses a self-propelled corn harvester speed reduction reversing box, and particularly relates to the field of agricultural machinery, the self-propelled corn harvester speed reduction reversing box comprises a box shell main body, an input shaft, a middle shaft and a driving bevel gear shaft are transversely arranged in the box shell main body from top to bottom in sequence, and the two ends of the input shaft protrude out of the box shell main body; a power input end and a mechanical connecting end are arranged at the two ends of the input shaft respectively. The power input end corresponding to the input shaft is connected with the engine through a belt or other modes to input power, the driven bevel gear shaft serves as output power to be connected with the header, and compared with a traditional power transmission mode that the engine transmits power to the header through a belt or a chain, the power transmission device has the advantages of being compact in mechanism, high in transmission efficiency and high in reliability. Blockage is removed by changing the rotating direction of the header gear, the speed reduction reversing box has a larger speed change range, the harvesting requirements of more crops and regions are met, and the equipment failure rate caused by factors such as weed blockage can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and more specifically, to a speed reduction and reversing gearbox for a self-propelled corn harvester. Background Technology

[0002] As a widely used crop worldwide, improvements in corn production efficiency and harvesting methods are crucial for enhancing agricultural productivity. Self-propelled corn harvesters, as powerful tools in modern agriculture, not only save manpower through mechanized harvesting but also increase harvesting efficiency and reduce crop losses, thereby increasing farmers' economic income and promoting industrialization and large-scale development.

[0003] However, existing corn harvesters often require speed changes and reversing operations under different harvesting environments and operating conditions. Traditional gearboxes mostly use rectangular spline sleeves for meshing to achieve speed changes and reversing, but this structure is prone to problems such as unstable transmission, high failure rate, and insufficient torque switching performance due to dense farm operating environments and weed blockage. Therefore, optimizing the design of the harvester's transmission system is particularly important for improving harvesting efficiency, reducing failure rates, and achieving stable and smooth operation, especially under changing terrain and corn crop conditions.

[0004] The prior art, patent CN106171300A, discloses a reduction gearbox for a self-propelled corn harvester. This gearbox can reduce and increase torque and reverse the power transmitted from the harvester's engine, rationally distributing it to the various working parts at the front and rear of the machine and the cab. However, it has certain drawbacks, including:

[0005] On the one hand, a gearbox with multiple speed settings is needed for self-propelled corn harvesters to better adapt to operational requirements in various regions and under different conditions. On the other hand, to solve the problem of difficulty in reverse gearing caused by weed blockage, a gearbox design with a stable structure and effective reverse gearing is also needed. Furthermore, by improving the gear structure and using two sets of meshing gear sleeves instead of rectangular spline sleeves, not only can transmission stability be improved, but production and maintenance costs are also expected to be reduced.

[0006] However, the relevant technologies still face considerable difficulties in practical applications. Therefore, it is necessary to develop a new type of self-propelled corn harvester gearbox to address the shortcomings of existing technologies and meet the needs of the market and farmers. Utility Model Content

[0007] In order to overcome the above-mentioned defects of the prior art, the present invention provides a speed reduction and reversing gearbox for a self-propelled corn harvester. The technical problem to be solved by the present invention is that the traditional self-propelled corn harvester has a limited speed range, insufficient reversing flexibility, and certain defects in the structural design of the transmission system, which leads to a high failure rate during equipment operation and affects harvesting efficiency and harvesting quality.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a reduction gearbox for a self-propelled corn harvester, comprising a gearbox body, wherein an input shaft, an intermediate shaft, and a drive bevel gear shaft are arranged horizontally from top to bottom inside the gearbox body, both ends of the input shaft protrude outward from the gearbox body, and the two ends of the input shaft are respectively configured as a power input end and a mechanical connection end, and the input shaft is externally connected to the engine of the self-propelled corn harvester through the mechanical connection end;

[0009] The bottom of the housing body is also provided with a passive bevel gear shaft, which is set as an output shaft. A multi-gear meshing transmission assembly is provided between the input shaft, intermediate shaft, active bevel gear shaft and passive bevel gear shaft.

[0010] In a preferred embodiment, the input shaft is designed as a drive shaft, and the input shaft is provided with a plurality of gear adjustment gears, which are sleeved on the outside of the input shaft and placed in the inner cavity of the housing body;

[0011] The multiple gear adjustment gears, from left to right, include a reverse drive gear, a third drive gear, a second drive gear, and a first drive gear. A meshing gear seat is provided between the reverse drive gear and the third drive gear. The meshing gear seat is sleeved on the outside of the input shaft, and a spraying gear sleeve is sleeved on the outside of the meshing gear seat.

[0012] In a preferred embodiment, the intermediate shaft is configured as a main reduction shaft, and a plurality of auxiliary adjusting gears are sleeved on the intermediate shaft. The auxiliary adjusting gears are sleeved on the outside of the intermediate shaft and placed in the inner cavity of the housing body.

[0013] The multiple auxiliary adjustment gears, from left to right, include a third-speed driven gear, a second-speed driven gear, and an intermediate gear.

[0014] In a preferred embodiment, the input shaft, intermediate shaft, driving bevel gear shaft, and driven bevel gear shaft are all made of high-strength alloy steel to ensure the stability and durability of the equipment under high loads and harsh environments.

[0015] The third-speed driven gear meshes with the third-speed driving gear for transmission, the second-speed driving gear meshes with the second-speed driven gear for transmission, and the intermediate gear meshes with the first-speed driving gear for transmission.

[0016] In a preferred embodiment, the inner surface of the housing body is designed with multiple reinforcing ribs, and the connection between the housing body and the input shaft, intermediate shaft, active bevel gear shaft and passive bevel gear shaft is also provided with bearings for support and positioning, thereby improving the torsional and seismic resistance of the overall structure.

[0017] The drive bevel gear shaft is fitted with a reverse driven gear, a drive bevel gear and a first-gear driven gear from left to right, wherein the first-gear driven gear meshes with the intermediate gear for transmission.

[0018] In a preferred embodiment, the passive bevel gear shaft passes through the housing body, and one end of the passive bevel gear shaft extending into the inner cavity of the housing body is connected to a passive bevel gear, which meshes with the driving bevel gear for transmission.

[0019] In a preferred embodiment, the passive bevel gear shaft is configured as an output shaft, and one end of the outer convex housing body of the passive bevel gear shaft is designed with a transmission mechanism that connects to the peeling machine, the elevator, and the front-end cutting table assembly.

[0020] In a preferred embodiment, multiple auxiliary adjusting gears work together with multiple gear adjusting gears to give the gearbox three forward gears and one reverse gear, and achieve a smooth transition during reversal through a meshing mechanism. The optimized gear set design achieves a more uniform power distribution.

[0021] The technical effects and advantages of this utility model are as follows:

[0022] 1. This utility model utilizes the power input end corresponding to the input shaft to connect to the engine input power via a belt or other means, and the passive bevel gear shaft as the output power to connect to the header. Compared with the traditional power transmission method of the engine transmitting power to the header via a belt or chain, it has the characteristics of compact structure, high transmission efficiency, and strong reliability. If the header is blocked during corn harvesting, the existing gearbox has the characteristics of forward and reverse rotation and multiple speed ratio transmission. By reversing, the rotation direction of the header gear can be changed to clear the blockages such as weeds and corn stalks. Compared with manual clearing of blockages, it saves labor and time, and also ensures safety. This makes the reduction gearbox have a larger speed range, adapting to the harvesting requirements of more crops and regions, and can effectively reduce the equipment failure rate caused by factors such as weed blockage.

[0023] 2. During corn harvesting, the dryness and wetness of the ground vary, as does the flatness. The dryness and wetness of corn stalks also vary at different times and in different locations. If the harvesting speed and the header speed are not matched, it will cause the header to clog, damage the header, or reduce efficiency. By using three transmission speed ratios, the header speed and harvesting speed can be better matched, improving production efficiency. Moreover, the gear engagement method uses meshing teeth and meshing sleeves, which is smoother and more reliable than the sliding tooth engagement method. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the neutral state structure of this utility model.

[0025] Figure 2 This is a schematic diagram of the structure of the first gear of this utility model.

[0026] Figure 3 This is a schematic diagram of the two-position structure of this utility model.

[0027] Figure 4 This is a schematic diagram of the three-position structure of this utility model.

[0028] Figure 5 This is a schematic diagram of the reversed state structure of this utility model.

[0029] The attached diagram is labeled as follows: 1. Housing body, 2. Input shaft, 3. Reverse drive gear, 4. Spraying gear sleeve, 5. Meshing gear seat, 6. Third gear drive gear, 7. Second gear drive gear, 8. First gear drive gear, 9. Intermediate gear, 10. Second gear driven gear, 11. Third gear driven gear, 12. Reverse driven gear, 13. First gear driven gear, 14. Drive bevel gear, 15. Driven bevel gear, 16. Driven bevel gear shaft, 17. Intermediate shaft, 18. Drive bevel gear shaft, 19. Power input end, 20. Mechanical connection end. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1:

[0031] This utility model provides, for example Figure 1-5 The gearbox shown is a self-propelled corn harvester gearbox, including a main body 1. Inside the main body 1, an input shaft 2, an intermediate shaft 17 and a drive bevel gear shaft 18 are arranged horizontally from top to bottom. Both ends of the input shaft 2 protrude outward from the main body 1. The two ends of the input shaft 2 are respectively set as a power input end 19 and a mechanical connection end 20. The input shaft 2 is externally connected to the engine of the self-propelled corn harvester through the mechanical connection end 20.

[0032] The bottom of the housing body 1 is also provided with a passive bevel gear shaft 16. A multi-gear meshing transmission assembly is provided between the input shaft 2, the intermediate shaft 17, the driving bevel gear shaft 18 and the passive bevel gear shaft 16. The passive bevel gear shaft 16 passes through the housing body 1, and one end of the passive bevel gear shaft 16 that extends into the inner cavity of the housing body 1 is connected to a passive bevel gear 15. The passive bevel gear 15 meshes with the driving bevel gear 14 for transmission. The passive bevel gear shaft 16 is set as an output shaft. One end of the passive bevel gear shaft 16 that protrudes out of the housing body 1 is designed with a transmission mechanism that connects to the peeling machine, the elevator and the front cutting table assembly.

[0033] The input shaft 2 is designed as a drive shaft. Multiple gear adjustment gears are provided on the input shaft 2. The gear adjustment gears are sleeved on the outside of the input shaft 2 and placed in the inner cavity of the housing body 1. The multiple gear adjustment gears include, from left to right, a reverse drive gear 3, a third drive gear 6, a second drive gear 7 and a first drive gear 8. A meshing gear seat 5 is provided between the reverse drive gear 3 and the third drive gear 6. The meshing gear seat 5 is sleeved on the outside of the input shaft 2, and a spraying gear sleeve 4 is sleeved on the outside of the meshing gear seat 5.

[0034] The intermediate shaft 17 is set as the main reduction shaft. Multiple auxiliary adjustment gears are sleeved on the intermediate shaft 17. The auxiliary adjustment gears are sleeved on the outside of the intermediate shaft 17 and placed in the inner cavity of the housing body 1. The multiple auxiliary adjustment gears include a third-speed driven gear 11, a second-speed driven gear 10 and an intermediate gear 9 from left to right.

[0035] Input shaft 2, intermediate shaft 17, driving bevel gear shaft 18 and driven bevel gear shaft 16 are all made of high-strength alloy steel to ensure the stability and durability of the equipment under high load and harsh environment; the third-speed driven gear 11 meshes with the third-speed driving gear 6, the second-speed driving gear 7 meshes with the second-speed driven gear 10, and the intermediate gear 9 meshes with the first-speed driving gear 8.

[0036] The inner surface of the housing body 1 is designed with multiple reinforcing ribs, and the connection between the housing body 1 and the input shaft 2, intermediate shaft 17, active bevel gear shaft 18 and passive bevel gear shaft 16 is also provided with bearings for support and positioning, which improves the torsional and shock resistance of the overall structure; the active bevel gear shaft 18 is fitted with a reverse passive gear 12, an active bevel gear 14 and a first-gear passive gear 13 from left to right, wherein the first-gear passive gear 13 meshes with the intermediate gear 9 for transmission;

[0037] Multiple auxiliary adjusting gears work together with multiple gear adjusting gears to give the gearbox three forward gears and one reverse gear. The meshing mechanism enables a smooth transition during reversal. The optimized gear set design achieves a more even power distribution.

[0038] The specific implementation method is as follows: In the manufacturing process, the assembly steps include first installing the input shaft 2 to the predetermined position of the housing body 1, then assembling the intermediate shaft 17, the driving bevel gear shaft 18, the driven bevel gear shaft 16 and the preset meshing gear sleeve and corresponding transmission components in sequence, and finally lubricating and testing all bearings and seals to ensure normal operation; the non-load operation in the assembly test step is used to confirm that each part is operating normally. Example 2:

[0039] Specifically, the drive bevel gear shaft 18, which is equipped with the reverse driven gear 12, the first-gear driven gear 13 and the drive bevel gear 14, and the drive bevel gear shaft 16, which is equipped with the driven bevel gear 15, are installed in the predetermined position of the housing body 1; the intermediate shaft 17 and the drive bevel gear shaft 18 are driven by the meshing of the first-gear driven gear 13 and the intermediate gear 9 to ensure that the gear sleeve can be smoothly switched between different gears;

[0040] The input shaft 2, intermediate shaft 17, driving bevel gear shaft 18, and driven bevel gear shaft 16, along with their corresponding gear transmission components, are installed in place to achieve gear meshing between adjacent shafts and ensure precise alignment with the engine connection. All bearings and seals are lubricated, and a non-load operation is performed before the main body 1 of the gearbox is closed to confirm that all parts are operating normally. Finally, the main body 1 of the gearbox is closed, and an overall performance test is conducted on the reduction gearbox to ensure that it can maintain good operating condition even under the highest load.

[0041] Neutral state, such as Figure 1 As shown, the passive bevel gear shaft 16 will not rotate at this time;

[0042] First gear state Figure 2 As shown, the spray-fitting sleeve 4 is biased to the right by the mechanism operation, and the input shaft 2 rotates counterclockwise; the transmission direction of the motion is as follows: the meshing tooth seat 5 of the rotating input shaft 2 is transmitted to the first gear drive gear 8 through the spray-fitting sleeve 4; then the drive bevel gear shaft 18 is driven to rotate through the meshing transmission of the first gear drive gear 8, the intermediate gear 9 and the first gear driven gear 13. At this time, the driven bevel gear shaft 16 is driven to rotate counterclockwise through the meshing transmission of the drive bevel gear 14 and the driven bevel gear 15.

[0043] Second gear status, as shown Figure 3 As shown, the spray-fitting sleeve 4 is offset to the left by the mechanism operation, and the input shaft 2 rotates counterclockwise. The transmission direction of the motion is as follows: the meshing tooth seat 5 of the rotating input shaft 2 is transmitted to the second gear drive gear 7 through the spray-fitting sleeve 4; then the second gear drive gear 7 and the second gear driven gear 10 mesh to drive the intermediate shaft 17 to rotate; then the intermediate gear 9 and the first gear driven gear 13 mesh to drive the drive bevel gear shaft 18 to rotate. At this time, the drive bevel gear shaft 16 rotates counterclockwise through the meshing of the drive bevel gear 14 and the driven bevel gear 15.

[0044] Three gear states as follows Figure 4 As shown, the spray-fitting sleeve 4 is biased to the right by the mechanism, and the input shaft 2 rotates counterclockwise. The transmission direction of the motion is as follows: the meshing tooth seat 5 of the rotating input shaft 2 is transmitted to the third gear drive gear 6 through the spray-fitting sleeve 4. The meshing transmission of the third gear drive gear 6 and the third gear driven gear 11 drives the intermediate shaft 17 to rotate. Then, the meshing transmission of the intermediate gear 9 and the first gear driven gear 13 drives the drive bevel gear shaft 18 to rotate. At this time, the meshing transmission of the drive bevel gear 14 and the driven bevel gear 15 drives the driven bevel gear shaft 16 to rotate counterclockwise.

[0045] Neutral state, such as Figure 5 As shown, the spray sleeve 4 is biased to the left by the mechanism operation. At this time, the reverse driving gear 3 and the reverse driven gear 12 mesh and contact, and the input shaft 2 rotates counterclockwise. The direction of motion transmission is as follows: the meshing tooth seat 5 of the rotating belt of the input shaft 2 is transmitted to the reverse driving gear 3 through the spray sleeve 4; then the rotation of the reverse driving gear 3 and the reverse driven gear 12 drives the driving bevel gear shaft 18 to rotate. At this time, the meshing transmission of the driving bevel gear 14 and the driven bevel gear 15 drives the driven bevel gear shaft 16 to rotate clockwise.

[0046] The gearbox of the self-propelled corn harvester not only features structural innovations, but also significantly improves transmission efficiency and reliability. Each component is made of high-strength alloy steel to ensure the stability and durability of the equipment under high loads and harsh environments.

[0047] The input shaft 2 is directly connected to the engine of the self-propelled corn harvester through the power input end 19, and is responsible for receiving and transmitting the power generated by the engine. The input shaft 2 is designed with gears of various positions. These gears are precision machined and heat treated to reduce friction and improve transmission efficiency. The other end of the input shaft 2 is designed with a transmission mechanism for the peeler and the elevator, namely the mechanical connection end 20.

[0048] The second shaft assembly, serving as the main reduction shaft, features a structure with two sets of meshing gear sleeves, which is the core innovation of this invention. The meshing gear sleeve design allows the gearbox to have three forward gears and one reverse gear, not only expanding the speed range but also achieving a smooth transition during reversal thanks to its flexible meshing mechanism, greatly reducing the possibility of mechanical failure.

[0049] The passive bevel gear shaft 16 is designed with a transmission mechanism that connects to the front header assembly; the optimized gear set design achieves a more uniform power distribution, fully ensuring accuracy and efficiency during the harvesting process; thus, the self-propelled corn harvester's reduction gearbox ensures smooth speed change and flexible reversing, helping to meet the diverse mechanization needs of modern agricultural production.

[0050] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0051] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0052] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gearbox for a self-propelled corn harvester, comprising a main body (1) of the gearbox shell, characterized in that: The main body of the housing (1) is provided with an input shaft (2), an intermediate shaft (17) and an active bevel gear shaft (18) arranged horizontally from top to bottom. Both ends of the input shaft (2) protrude outward from the main body of the housing (1). The two ends of the input shaft (2) are respectively set as a power input end (19) and a mechanical connection end (20). The input shaft (2) is externally connected to the engine of the self-propelled corn harvester through the mechanical connection end (20). The bottom of the housing body (1) is also provided with a passive bevel gear shaft (16), and a multi-gear meshing transmission assembly is provided between the input shaft (2), intermediate shaft (17), active bevel gear shaft (18) and passive bevel gear shaft (16).

2. The reduction gearbox for a self-propelled corn harvester according to claim 1, characterized in that: The input shaft (2) is designed as a transmission shaft. Multiple gear adjustment gears are provided on the input shaft (2). The gear adjustment gears are sleeved on the outside of the input shaft (2) and placed in the inner cavity of the housing body (1). The multiple gear adjustment gears include, from left to right, a reverse drive gear (3), a third drive gear (6), a second drive gear (7), and a first drive gear (8). A meshing gear seat (5) is provided between the reverse drive gear (3) and the third drive gear (6). The meshing gear seat (5) is sleeved on the outside of the input shaft (2), and a spraying gear sleeve (4) is sleeved on the outside of the meshing gear seat (5).

3. The reduction gearbox for a self-propelled corn harvester according to claim 2, characterized in that: The intermediate shaft (17) is set as the main reduction shaft. Multiple auxiliary adjustment gears are sleeved on the intermediate shaft (17). The auxiliary adjustment gears are sleeved on the outside of the intermediate shaft (17) and placed in the inner cavity of the housing body (1). The multiple auxiliary adjustment gears, from left to right, include a third-speed passive gear (11), a second-speed passive gear (10), and an intermediate gear (9).

4. The gearbox for a self-propelled corn harvester according to claim 3, characterized in that: The input shaft (2), intermediate shaft (17), driving bevel gear shaft (18) and driven bevel gear shaft (16) are all made of high-strength alloy steel; The third-speed passive gear (11) meshes with the third-speed active gear (6) for transmission, the second-speed active gear (7) meshes with the second-speed passive gear (10) for transmission, and the intermediate gear (9) meshes with the first-speed active gear (8) for transmission.

5. The reduction gearbox for a self-propelled corn harvester according to claim 3, characterized in that: The inner surface of the housing body (1) is designed with multiple reinforcing ribs, and the connection between the housing body (1) and the input shaft (2), intermediate shaft (17), active bevel gear shaft (18) and passive bevel gear shaft (16) is also provided with bearings for support and positioning; The active bevel gear shaft (18) is provided with a reverse passive gear (12), an active bevel gear (14) and a first-gear passive gear (13) sequentially mounted from left to right, wherein the first-gear passive gear (13) meshes with the intermediate gear (9) for transmission.

6. The gearbox for a self-propelled corn harvester according to claim 5, characterized in that: The passive bevel gear shaft (16) penetrates the housing body (1), and one end of the passive bevel gear shaft (16) extending into the inner cavity of the housing body (1) is connected to a passive bevel gear (15). The passive bevel gear (15) meshes with the active bevel gear (14) for transmission.

7. The gearbox for a self-propelled corn harvester according to claim 6, characterized in that: The passive bevel gear shaft (16) is set as an output shaft. One end of the outer convex housing body (1) of the passive bevel gear shaft (16) is designed with a transmission mechanism that connects to the peeling machine, the elevator and the front cutting table assembly.

8. The reduction gearbox for a self-propelled corn harvester according to claim 3, characterized in that: Multiple auxiliary adjustment gears work together with multiple gear adjustment gears to give the gearbox three forward gears and one reverse gear.

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