Transmission gear box of corn harvesting header

Abstract

The utility model discloses a transmission gear box of a corn harvesting header, and belongs to the technical field of corn harvesting devices. The transmission gear box comprises a shell and a main shaft, the main shaft transversely penetrates through the shell and is rotationally connected with the left end and the right end of the shell, and a first driving gear and a second driving gear are installed on the main shaft and used for driving the first reel chain gear and the second reel chain gear in a meshed mode respectively. The central floating gear is connected to the main shaft and arranged in the middle of the shell, a first bevel gear and a second bevel gear on the two sides of the central floating gear are meshed with the first stem pulling roller gear and the second stem pulling roller gear respectively, and the central floating gear is axially arranged in a floating mode, has a left-right sliding space and is used for sliding the stem pulling roller gear when stress on the two sides is not uniform. The central floating gear can be automatically aligned to a stress balance point along the main shaft; and the gear transmission is efficient and stable, the energy consumption of the gear box is small, the efficiency and the reliability are high, and the loss is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of corn harvesting devices, and in particular to a transmission gearbox for a corn harvesting header. Background Technology

[0002] As the core operating component of a corn harvester, the corn harvesting header is the "first line of defense" ensuring harvesting efficiency and grain quality. Its performance directly determines the integrity, efficiency, and adaptability of the corn harvest. This component integrates multiple functions such as separating the stalks, picking ears, and feeding, and can accurately guide the corn plants and separate the ears, laying a solid foundation for subsequent processes such as peeling, cleaning, and straw return to the field. The header transmission gearbox is widely used in the field of corn harvesters. The header gearbox is responsible for the transmission of processes such as stalk picking, feeding, and lateral conveying. Its efficiency, reliability, and adaptability directly affect the working quality of the entire header and are the "heart" of the header.

[0003] Double-row planting of corn on wide ridges refers to a dense planting pattern in which traditional small ridges are merged into large ridges, and two rows of corn are planted on each ridge. By optimizing the row spacing, it improves ventilation and light penetration in the field, enhances photosynthetic efficiency, and facilitates centralized water and fertilizer management and mechanized operations. It can significantly increase yield per unit area and is suitable for large-scale planting areas such as Northeast China. It is one of the mainstream planting methods for high yield and high efficiency.

[0004] Most headers on the market are of equal row spacing, with fixed back-to-back bevel gears on the gearbox. This results in even force distribution on both sides of the gearbox, leading to smooth and reliable operation. However, if directly installed on wide-narrow row or wide-ridge double-row headers, the inconsistent row spacing on both sides of the gearbox causes uneven force distribution on the gears, unstable transmission, significantly reduced reliability and efficiency, and increased failure rate. Therefore, there is an urgent need for a gearbox that can be used on both equal row spacing and wide-narrow row / wide-ridge double-row headers. Utility Model Content

[0005] The purpose of this invention is to provide a gearbox that is universally applicable to both equal-row spacing and wide-narrow-row cutting platforms, as well as double-row cutting platforms with large ridges, in order to solve the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides a transmission gearbox for a corn harvesting header. The transmission gearbox includes a housing and a main shaft. The main shaft extends laterally through the housing and is rotatably connected to the left and right ends of the housing. Inside the housing are a central floating gear, a first stalk-pulling roller gear, a second stalk-pulling roller gear, a first drive gear, a second drive gear, a first reeling chain gear, and a second reeling chain gear. The central floating gear includes a first bevel gear and a second bevel gear, which are fixedly connected back-to-back. The central floating gear is connected to the main shaft via a flat key and is arranged in the middle of the housing. The flat key is arranged along the direction of the main shaft. The first stalk-pulling roller gear and the second stalk-pulling roller gear are mounted on the housing. The first bevel gear and the second bevel gear on both sides of the central floating gear mesh with the first stalk-pulling roller gear and the second stalk-pulling roller gear, respectively. The central floating gear is axially floating and has left and right sliding space. When the forces on both sides are uneven, the central floating gear can automatically align itself to the force balance point along the main shaft.

[0007] The first drive gear and the second drive gear are respectively arranged on both sides of the central floating gear and mounted on the main shaft. The first reeling chain gear and the second reeling chain gear are mounted on the housing and mesh with the first drive gear and the second drive gear respectively.

[0008] Furthermore, the first bevel gear and the second bevel gear are fixedly connected by being integrally formed.

[0009] Furthermore, the left and right floating distance of the central floating gear is 0-10mm.

[0010] Furthermore, keyways are provided on the inner sides of both the main shaft and the central floating gear for mounting flat keys.

[0011] Beneficial effects of this utility model

[0012] This utility model provides a gearbox that can be used in both equal-pitch and non-equal-pitch cutting tables. In particular, when applied to a gearbox for non-equal-pitch cutting tables, the central floating gear is not fixed in position on the main shaft and can move slightly along the axial direction. The central floating gear will automatically find an optimal position to mesh with the pull roller gear according to the force on both sides, so that the force on both sides is balanced and stable, the gear transmission is efficient and stable, the gearbox has low energy consumption, high efficiency and reliability, and reduces losses. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall external structure of the gearbox provided by this utility model;

[0014] Figure 2 A schematic diagram of the internal structure of the gearbox provided by this utility model;

[0015] Figure 3 A schematic diagram of a partial internal structure of the gearbox provided by this utility model;

[0016] Figure 4 A schematic diagram of the non-equidistant corn harvesting header structure provided by this utility model;

[0017] Figure 5 A schematic diagram of the gearbox application structure provided by this utility model.

[0018] In the diagram, 1. Housing; 2. Main shaft; 3. Central floating gear; 4. First stalk pulling roller gear; 5. Second stalk pulling roller gear; 6. First drive gear; 7. Second drive gear; 8. First reeling chain gear; 9. Second reeling chain gear; 10. Flat key;

[0019] 31. First bevel gear; 32. Second bevel gear; 33. Keyway. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0021] It should be noted that the terms "upper", "lower", "left", "right" and "one side" used herein indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of illustrative purposes and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] See Figures 1-5 ;

[0023] like Figure 4As shown, the non-equidistant corn harvesting header contains multiple gearboxes. However, due to the different row spacing on both sides of each gearbox, the central floating gear in each gearbox experiences uneven force distribution. To solve this problem, this application discloses a transmission gearbox for a corn harvesting header. The transmission gearbox includes a housing 1 and a main shaft 2. The main shaft 2 extends laterally through the housing 1 and is rotatably connected to the left and right ends of the housing 1. Inside the housing 1 are a central floating gear 3, a first stalk-pulling roller gear 4, a second stalk-pulling roller gear 5, a first drive gear 6, a second drive gear 7, a first reeling chain gear 8, and a second reeling chain gear 9. The central floating gear 3 includes a first bevel gear 31 and a second bevel gear 32, which are fixedly connected back-to-back. Furthermore, the first bevel gear 31 and the second bevel gear 32 are integrally formed and fixedly connected; the central floating gear 3 is connected to the main shaft 2 via a flat key 10 and arranged in the middle of the housing 1, with the flat key 10 arranged along the main shaft 2; the first stem-pulling roller gear 4 and the second stem-pulling roller gear 5 are installed on the front side of the housing 1, and the first bevel gear 31 and the second bevel gear 32 on both sides of the central floating gear 3 mesh with the first stem-pulling roller gear 4 and the second stem-pulling roller gear 5 respectively. The central floating gear 3 is axially floating and has left and right sliding space, so that when the forces on both sides are uneven, the central floating gear 3 can automatically align itself to the force balance point along the main shaft 2; furthermore, the left and right floating distance of the central floating gear is 0-10mm.

[0024] The first drive gear 6 and the second drive gear 7 are respectively arranged on both sides of the central floating gear 3 and mounted on the main shaft 2 by a flat key. The first reel chain gear 8 and the second reel chain gear 9 are mounted on the top of the housing 1, and they mesh with the first drive gear 6 and the second drive gear 7 respectively.

[0025] Furthermore, both the main shaft 2 and the central floating gear 3 have keyways 33 on their inner sides for mounting the flat key 10.

[0026] Operating procedure: The main shaft 2 is driven to rotate by the header motor; it directly drives the central floating gear 3, the first drive gear 6, and the second drive gear 7 to rotate synchronously. The central floating gear 3 drives the first stalk puller gear 4 and the second stalk puller gear 5, which mesh with it, through the first bevel gear 31 and the second bevel gear 32, respectively. The first drive gear 6 and the second drive gear 7 drive the first reeling chain gear 8 and the second reeling chain gear 9, which mesh with it, respectively. When the forces on both sides of the central floating gear 3 are uneven, the central floating gear 3 will float along the axial direction and automatically align itself until the axial resultant force is zero, thus achieving balance and making the gear transmission efficient and stable.

[0027] In equidistant corn harvesting headers, this gearbox can also be used as a conventional gearbox.

[0028] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A transmission gearbox for a corn harvester header, characterized in that, The transmission gearbox includes a housing (1) and a main shaft (2). The main shaft (2) passes through the housing (1) laterally and is rotatably connected to the left and right ends of the housing (1). The housing (1) is equipped with a central floating gear (3), a first stalk-pulling roller gear (4), a second stalk-pulling roller gear (5), a first drive gear (6), a second drive gear (7), a first reeling chain gear (8), and a second reeling chain gear (9). The central floating gear (3) includes a first bevel gear (31) and a second bevel gear (32), which are fixedly connected back to back. The central floating gear (3) is connected by a flat key (10). The flat key (10) is connected to the main shaft (2) and arranged in the middle of the housing (1). The flat key (10) is arranged along the main shaft (2). The first stem-pulling roller gear (4) and the second stem-pulling roller gear (5) are installed on the housing (1). The first bevel gear (31) and the second bevel gear (32) on both sides of the central floating gear (3) mesh with the first stem-pulling roller gear (4) and the second stem-pulling roller gear (5) respectively. The central floating gear (3) is arranged to float axially and has left and right sliding space. When the forces on both sides are uneven, the central floating gear (3) can automatically find the force balance point along the main shaft (2). The first drive gear (6) and the second drive gear (7) are respectively arranged on both sides of the central floating gear (3) and mounted on the main shaft (2). The first reel chain gear (8) and the second reel chain gear (9) are mounted on the housing (1), and they mesh with the first drive gear (6) and the second drive gear (7) respectively.

2. The transmission gearbox for a corn harvester header according to claim 1, characterized in that, The first bevel gear (31) and the second bevel gear (32) are fixedly connected by being integrally formed.

3. The transmission gearbox for a corn harvester header according to claim 1, characterized in that, The central floating gear (3) has a left-right floating distance of 0-10mm.

4. A corn harvester head transmission gear box as defined in claim 1 wherein, Both the main shaft (2) and the central floating gear (3) have keyways (33) on their inner sides for mounting flat keys (10).

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