A reversing gearbox for agricultural machinery

Abstract

This utility model discloses a reversing gearbox for agricultural machinery. The transmission mechanism includes a power input shaft, a forward output shaft, a reverse output shaft, a drive gear set, a forward shifting assembly, and a reverse shifting assembly. The power input shaft, forward output shaft, and reverse output shaft are arranged in parallel and rotatably mounted inside the gearbox. The drive gear set is mounted on the power input shaft. Both the forward and reverse shifting assemblies are housed within the gearbox, and their working ends are adapted to the drive gear set. The working end of the forward shifting assembly is slidably connected to the forward output shaft, and the working end of the reverse shifting assembly is slidably connected to the reverse output shaft. A torsion spring connected to the gearbox is provided at the inner end of both the forward and reverse shifting assemblies, and an arc-shaped limiting groove is provided at the inner end of both assemblies. This gearbox allows for shifting and gear adjustment, achieving smooth shifting and assisting in gear control, greatly improving the performance of the gearbox.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and in particular to a reversing gearbox for agricultural machinery. Background Technology

[0002] Mechanical gearboxes primarily utilize the speed reduction principle of gear transmission. Simply put, a gearbox contains multiple sets of gear pairs with different transmission ratios. The gear shifting behavior when operating agricultural machinery involves manipulating different gear pairs within the gearbox through a control mechanism. For example, at low speeds, gear pairs with higher transmission ratios are engaged, while at high speeds, gear pairs with lower transmission ratios are engaged.

[0003] Currently, traditional agricultural machinery requires gearboxes to provide different forward and reverse gears for selection. For example, the Chinese utility model patent with publication number CN213655616U, entitled "Gearbox Gear Adjustment Device," uses two forward and reverse shifting mechanisms to change transmission and direction. Existing shifting mechanisms all require a shift shaft positioning structure to temporarily fix the position of the shift shaft. However, this leads to problems such as difficulty in shifting gears by moving the shift shaft horizontally, making it difficult to control. Utility Model Content

[0004] The purpose of this utility model is to provide a reversing gearbox for agricultural machinery to solve the problem that the shift shaft is difficult to move horizontally during gear shifting in existing gearboxes, making it difficult to control.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A reversing gearbox for agricultural machinery includes a housing and a transmission mechanism disposed within the housing. The transmission mechanism includes a power input shaft, a forward output shaft, a reverse output shaft, a drive gear set, a forward shifting assembly, and a reverse shifting assembly. The power input shaft, the forward output shaft, and the reverse output shaft are arranged in parallel and rotatably mounted within the housing. The drive gear set is disposed on the power input shaft. The forward shifting assembly and the reverse shifting assembly are both disposed within the housing, and their working ends are adapted to the drive gear set. The working end of the forward shifting assembly is slidably connected to the forward output shaft, and the working end of the reverse shifting assembly is slidably connected to the reverse output shaft.

[0007] Both the forward shifting component and the reverse shifting component have torsion springs connected to the housing at their inner ends, and both have arc-shaped limiting grooves at their inner ends.

[0008] A further technical solution is: the forward shifting assembly and the reverse shifting assembly have the same structure. The reverse shifting assembly includes a moving gear assembly, a connecting member, and a reversing rod. The reversing rod is slidably installed in the housing. One end of the connecting member is connected to the reversing rod, and the other end of the connecting member is rotatably connected to the moving gear assembly. The moving gear assembly is slidably connected to the reverse output shaft through a spiral shaft and a spiral groove structure.

[0009] A further technical solution is that a gear slot is provided at one end of the reversing lever.

[0010] A further technical solution is: the gear slot is provided with a matching limiting component, the limiting component includes a spring and a limiting bead, the spring and the limiting bead are both installed in the limiting hole of the housing, and the spring presses the limiting bead tightly in the gear slot.

[0011] A further technical solution is: the moving gear assembly includes a sliding sleeve and a driven gear set, the sliding sleeve is slidably mounted on the reverse output shaft through the flower shaft and the flower groove structure, and the driven gear set is mounted on the sliding sleeve.

[0012] A further technical solution is that both the driving gear set and the driven gear set are composed of at least two gears with different diameters.

[0013] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0014] This utility model proposes a reversing gearbox for agricultural machinery. The gearbox can perform gear shifting by using forward and reverse shifting components, and the gear height can be adjusted between forward and reverse gears. On this basis, when the shifting components rotate, the return of the torsion spring and the resulting resistance force are used to facilitate smooth gear shifting for the operator. The axial resistance force automatically locks the shifting components. Secondly, the operator knows the number of gears based on the axial resistance force, which greatly improves the performance of the gearbox. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the reversing gearbox for agricultural machinery according to the present invention.

[0016] Figure 2 This utility model Figure 1 A schematic diagram of the intermediate speed change mechanism.

[0017] Figure 3 This utility model Figure 2 A schematic diagram of the forward shifter assembly.

[0018] Figure 4 This utility model Figure 2A partially enlarged structural diagram of the commutator.

[0019] Reference numerals: 1. Housing; 2. Transmission mechanism; 3. Power input shaft; 4. Forward output shaft; 5. Reverse output shaft; 6. Drive gear set; 7. Forward shifting assembly; 8. Reverse shifting assembly; 9. Moving gear assembly; 10. Connecting component; 11. Reversing lever; 12. Gear slot; 13. Limiting assembly; 14. Spring; 15. Limiting bead; 16. Limiting hole; 17. Torsion spring; 18. Arc-shaped limiting groove; 19. Sliding sleeve; 20. Driven gear set. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not 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. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0026] This implementation example Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a reversing gearbox for agricultural machinery includes a housing 1 and a transmission mechanism 2 disposed within the housing 1. The transmission mechanism 2 includes a power input shaft 3, a forward output shaft 4, a reverse output shaft 5, a drive gear set 6, a forward shifting assembly 7, and a reverse shifting assembly 8. The power input shaft 3, the forward output shaft 4, and the reverse output shaft 5 are arranged in parallel and are all rotatably mounted within the housing 1. The drive gear set 6 is disposed on the power input shaft 3. The forward shifting assembly 7 and the reverse shifting assembly 8 are both disposed within the housing 1, and their working ends are adapted to the drive gear set 6. The working end of the forward shifting assembly 7 is slidably connected to the forward output shaft 4, and the working end of the reverse shifting assembly 8 is slidably connected to the reverse output shaft 5.

[0027] Both the forward shifting assembly 7 and the reverse shifting assembly 8 have torsion springs 17 connected to the housing 1 at their inner ends, and both have arc-shaped limiting grooves 18 at their inner ends.

[0028] The forward output shaft 4 and the reverse output shaft 5 are located on opposite sides of the power input shaft 3. Under the control of the forward shifting assembly 7 and the reverse shifting assembly 8, the forward output shaft 4 and the reverse output shaft 5 can be connected to the power input shaft 3 separately or simultaneously, achieving power output in different directions and at different speeds. When operating the forward shifting assembly 7 and the reverse shifting assembly 8, the two ends of the torsion spring 17 are fixed by the shifting assembly and the housing, respectively. For example, during shifting, the torsion spring 17 may be stretched or compressed. The operator can judge the gear position based on the axial resistance provided by the torsion spring 17, which helps the operator to accurately control the gears if the equipment is damaged or contaminated. Furthermore, during shifting, the shifter first twists, then resets, and finally enters the new gear. This unlocks the shifter positioning mechanism from locking the previous gear, facilitating smooth shifting. Then, under the action of the torsion spring 17, it automatically resets and enters the new gear, while the shifter positioning mechanism locks the current gear. This achieves smooth shifting and assists in gear control.

[0029] The arc-shaped limit groove 18 is used to prevent the shifting assembly from over-rotating during gear shifting.

[0030] Preferably, the forward shifting assembly 7 and the reverse shifting assembly 8 have the same structure. The reverse shifting assembly 8 includes a moving gear assembly 9, a connecting member 10, and a reversing rod 11. The reversing rod 11 is slidably installed in the housing 1. One end of the connecting member 10 is connected to the reversing rod 11, and the other end of the connecting member 10 is rotatably connected to the moving gear assembly 9. The moving gear assembly 9 is slidably connected to the reverse output shaft 5 through a spiral shaft and a spiral groove structure.

[0031] The reversing lever 11 moves back and forth, and through the connecting piece 10, it carries the moving gear assembly 9 to move back and forth along the output shaft, thereby engaging or disengaging with the drive gear set 6 to achieve the purpose of shifting gears and changing direction.

[0032] Preferably, a gear slot 12 is provided at one end of the reversing lever 11.

[0033] It is worth noting that the gear shift groove 12 is usually annular, but in order to match the torsion spring 17 and the new shifting method, the gear shift groove 12 needs to be set as a semi-circular (crescent-shaped).

[0034] Preferably, the gear slot 12 is provided with a matching limiting component 13, which includes a spring 14 and a limiting bead 15. The spring 14 and the limiting bead 15 are both installed in the limiting hole 16 of the housing 1, and the spring 14 presses the limiting bead 15 into the gear slot 12.

[0035] Spring 14 presses the limiting bead 15 into the gear slot 12 to lock the current gear.

[0036] Preferably, the moving gear assembly 9 includes a sliding sleeve 19 and a driven gear set 20. The sliding sleeve 19 is slidably mounted on the reverse output shaft 5 through the flower shaft and flower groove structure, and the driven gear set 20 is mounted on the sliding sleeve 19.

[0037] Preferably, both the driving gear set 6 and the driven gear set 20 are composed of at least two gears with different diameters.

[0038] The gears of different diameters on the driving gear set 6 and the gears of different diameters on the driven gear set 20 can form a variety of transmission ratios, that is, different gears.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A reversing gearbox for agricultural machines, characterized in that: The gearbox includes a housing (1) and a transmission mechanism (2) disposed within the housing (1). The transmission mechanism (2) includes a power input shaft (3), a forward output shaft (4), a reverse output shaft (5), a drive gear set (6), a forward shifting assembly (7), and a reverse shifting assembly (8). The power input shaft (3), the forward output shaft (4), and the reverse output shaft (5) are arranged in parallel and are rotatably mounted within the housing (1). The drive gear set (6) is disposed on the power input shaft (3). The forward shifting assembly (7) and the reverse shifting assembly (8) are both disposed within the housing (1), and their working ends are adapted to the drive gear set (6). The working end of the forward shifting assembly (7) is slidably connected to the forward output shaft (4), and the working end of the reverse shifting assembly (8) is slidably connected to the reverse output shaft (5). The inner ends of the forward shifting assembly (7) and the reverse shifting assembly (8) are provided with torsion springs (17) connected to the housing (1), and the inner ends of the forward shifting assembly (7) and the reverse shifting assembly (8) are provided with arc-shaped limiting grooves (18).

2. The reversing gearbox for agricultural machines according to claim 1, characterized in that: The forward shifting assembly (7) and the reverse shifting assembly (8) have the same structure. The reverse shifting assembly (8) includes a moving gear assembly (9), a connector (10) and a reversing rod (11). The reversing rod (11) is slidably installed in the housing (1). One end of the connector (10) is connected to the reversing rod (11), and the other end of the connector (10) is rotatably connected to the moving gear assembly (9). The moving gear assembly (9) is slidably connected to the reverse output shaft (5) through a flower shaft and flower groove structure.

3. The agricultural machinery reversing gearbox according to claim 2, characterized in that: One end of the reversing lever (11) is provided with a gear slot (12).

4. The agricultural machinery reversing gearbox according to claim 3, characterized in that: The gear slot (12) is provided with a matching limiting component (13). The limiting component (13) includes a spring (14) and a limiting bead (15). The spring (14) and the limiting bead (15) are both installed in the limiting hole (16) of the housing (1). The spring (14) presses the limiting bead (15) into the gear slot (12).

5. The agricultural machinery reversing gearbox according to claim 2, characterized in that: The moving gear assembly (9) includes a sliding sleeve (19) and a driven gear set (20). The sliding sleeve (19) is slidably mounted on the reverse output shaft (5) through a flower shaft and a flower groove structure, and the driven gear set (20) is mounted on the sliding sleeve (19).

6. The agricultural machinery reversing gearbox according to claim 5, characterized in that: Both the driving gear set (6) and the driven gear set (20) are composed of at least two gears with different diameters.

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