Double-output-shaft overload protection gearbox

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to a double-output-shaft overload protection gearbox which comprises a shell, a transmission assembly, an input shaft and output shafts, and the input shaft and the output shafts are both rotationally connected with the shell; the transmission assembly is arranged in the shell and used for being in linkage with the input shaft and the output shaft, and when the input shaft rotates, the output shaft is driven to rotate through the transmission assembly; the transmission assembly comprises a driving gear and a driven gear, the driving gear is connected with the input shaft, and the driven gear is meshed with the driving gear and connected with the output shaft; a connecting ring is arranged between the driving gear and the input shaft, the connecting ring sleeves the outer side of the input shaft and is connected with the input shaft, and the driving gear is connected to the top wall of the connecting ring; a protection piece is arranged between the connecting ring and the input shaft and comprises a connecting column, when the torque is increased suddenly, the connecting column is broken, the connecting ring and the input shaft are separated from each other, and the effect of reducing the maintenance cost of the machine body is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of agricultural machinery, in particular to a double-output-shaft overload protection gear box. BACKGROUND

[0002] At present, in agricultural production, agricultural machines often face complex and changeable working environments and load conditions. For example, during harvesting operations, the machine's transmission system may be subjected to excessive torque due to factors such as excessive crop density and entanglement of debris.

[0003] Existing agricultural machines may encounter obstacles such as hard underground stones or tree roots during operations such as plowing, which poses a risk of instantaneous overload to the machine's transmission components.

[0004] The existing technical solutions in the above have the following defects: sudden overload of the machine body can damage key components of the machine, such as gears, transmission shafts, etc., resulting in high maintenance costs. CONTENT OF THE UTILITY MODEL

[0005] The application provides a double-output-shaft overload protection gear box to reduce the maintenance cost of the machine body when using agricultural machines for operations.

[0006] The above technical purpose of the application is achieved through the following technical solutions:

[0007] A double-output-shaft overload protection gear box, comprising a housing, a transmission assembly, an input shaft and an output shaft, the input shaft and the output shaft are both rotationally connected with the housing; the transmission assembly is arranged in the housing, and the transmission assembly is used for linking the input shaft and the output shaft, and when the input shaft rotates, the output shaft is driven to rotate through the transmission assembly; the transmission assembly comprises a driving gear and a driven gear, the driving gear is connected with the input shaft, the driven gear is arranged in meshing with the driving gear and is connected with the output shaft; a connecting ring is arranged between the driving gear and the input shaft, the connecting ring is sleeved outside the input shaft and is connected with the input shaft, and the driving gear is connected to the top wall of the connecting ring; a protection piece is arranged between the connecting ring and the input shaft, the protection piece comprises a connecting column, both ends of the connecting column are connected with the connecting ring and the input shaft respectively, when the torque suddenly increases, the connecting column breaks, and the connecting ring and the input shaft are separated from each other.

[0008] By adopting the above scheme, the input shaft rotates to drive the driving gear to rotate, and the driving gear rotates to drive the driven gear to rotate, thereby driving the output shaft to rotate; because the connecting column is arranged, under normal conditions, the connecting column is connected with the input shaft and the connecting ring on the two sides respectively, the input shaft rotates to drive the connecting ring to rotate through the connecting column, and the connecting ring can drive the driving gear to rotate; when the output shaft is blocked, that is, the input shaft rotates and the output shaft is stationary, at this time, the torque received by the driving gear increases, the connecting column is broken due to excessive force, and the connecting ring is separated from the input shaft, under this condition, the connecting shaft can rotate in the connecting ring but cannot drive the connecting ring to rotate, thereby avoiding the connecting ring from driving the driving gear to rotate, causing the driving gear to be scratched between the stationary driven gear, and achieving the effect of reducing the maintenance cost of the machine body.

[0009] Further, the side wall of the connecting ring close to the connecting column is uniformly provided with a plurality of chamfered grooves, one end of the connecting column is connected with the side wall of the input shaft, and the other end is connected with the chamfered groove.

[0010] By adopting the above scheme, under the normal running state of the machine body, the connecting column is connected with the clamping groove, so that the input shaft can drive the connecting ring to rotate through the connecting column.

[0011] Further, a recessed fracture groove is arranged on the circumferential side of the connecting column.

[0012] By adopting the above scheme, the arrangement of the fracture groove reduces the rigidity of the connecting column at this position, under normal conditions, the input shaft can drive the connecting ring to rotate through the connecting column, when the output shaft is stuck, the input shaft cannot drive the output shaft to rotate through the transmission assembly, at this time, the torsion of the input shaft increases, so that the torsion of the connecting column also increases, and the connecting column will be broken at the fracture groove, so that the input shaft and the connecting ring are disconnected.

[0013] Further, the output shaft is provided with a positioning ring, the positioning ring is rotatably connected with the output shaft, and the bottom wall of the positioning ring is fixedly connected with the shell.

[0014] By adopting the above scheme, the arrangement of the positioning ring makes the relative rotation between the input shaft and the shell more stable.

[0015] Further, a limiting plate is arranged between the outer wall of the positioning ring and the inner wall of the shell, and the limiting plate is fixedly connected with the positioning ring and the shell on the two sides respectively.

[0016] By adopting the above scheme, the arrangement of the limiting plate can increase the stability of the connection between the shell and the positioning ring.

[0017] Furthermore, a sealing ring is provided near the top of the input shaft, and the sealing ring is fixedly connected to the input shaft. A gap is left between the bottom wall of the sealing ring and the top wall of the connecting ring. A limiting groove is formed inward on the input shaft near the top and above the sealing ring, and a blocking plate is inserted into the limiting groove.

[0018] By adopting the above solution, the sealing ring can block the gap between the connecting ring and the input shaft, preventing the connecting column from flying out through the gap after it breaks; the setting of the baffle plate can block the sealing plate. Because the sealing plate is made of a soft material, it prevents the sealing plate from flipping outward toward the baffle plate after being hit by the connecting column.

[0019] Furthermore, the side wall of the input shaft is recessed inward to form an expansion groove, and the expansion groove is recessed inward to form a threaded groove. One end of the connecting post is threadedly connected to the threaded groove, and the other end of the connecting post is engaged with the oblique groove.

[0020] By adopting the above scheme, the expansion groove increases the space between the input shaft and the annular groove, and the threaded groove facilitates the disassembly of the connecting column.

[0021] Furthermore, a number of heat sinks are uniformly and fixedly connected to the outer wall of the housing, and the heat sinks are used to dissipate heat inside the housing.

[0022] By adopting the above solution, the machine body will generate heat during operation, and the heat sink can dissipate the heat from inside the casing.

[0023] In summary, this application has the following technical effects:

[0024] 1. By designing this housing, the input shaft rotates, driving the drive gear, which in turn drives the driven gear, thus rotating the output shaft. Because of the connecting post, under normal conditions, the two sides of the connecting post are connected to the input shaft and the connecting ring respectively. The input shaft rotates, driving the connecting ring through the connecting post, which in turn drives the drive gear. When the output shaft is obstructed (i.e., the input shaft rotates while the output shaft remains stationary), the torque on the drive gear increases. The connecting post breaks due to excessive force, and the connecting ring separates from the input shaft. In this state, the connecting shaft will rotate within the connecting ring but cannot drive the connecting ring to rotate. This prevents the connecting ring from driving the drive gear, thus avoiding friction between the drive gear and the stationary driven gear, and reducing the machine's maintenance costs.

[0025] 2. By setting a fracture groove, the rigidity of the connecting column is weakened at this point. Under normal conditions, the input shaft can rotate and drive the connecting ring to rotate through the connecting column. When the output shaft is jammed, the input shaft cannot drive the output shaft to rotate through the transmission component. At this time, the torque on the input shaft increases, and the torque on the connecting column also increases. The connecting column will break at the fracture groove, and the input shaft and the connecting ring will be disconnected.

[0026] 3. By setting up heat sinks, the heat generated during the machine's operation can be dissipated from the casing. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of a dual-output-shaft overload protection gearbox according to this application;

[0028] Figure 2 This is a cross-sectional view of this application;

[0029] Figure 3 This is a structural diagram showing the connection relationship between the oblique groove, the connecting column, and the expansion groove in this application.

[0030] In the diagram, 1 is the housing; 11 is the heat sink; 2 is the transmission assembly; 21 is the driving gear; 22 is the driven gear; 3 is the input shaft; 31 is the expansion slot; 4 is the output shaft; 5 is the connecting ring; 51 is the oblique groove; 6 is the connecting column; 61 is the fracture groove; 7 is the positioning assembly; 71 is the positioning ring; 72 is the limiting plate; 8 is the sealing ring; 9 is the blocking plate; and 10 is the support ring. Detailed Implementation

[0031] The present application will be further described in detail below with reference to the accompanying drawings.

[0032] Reference Figures 1-2 This embodiment provides a dual-output shaft overload protection gearbox, including a housing 1, an input shaft 3, an output shaft 4, and a transmission assembly 2. In this embodiment, two output shafts 4 are provided. The input shaft 3 is inserted into the housing 1 and rotatably connected to the housing 1. The two output shafts 4 are respectively arranged on both sides of the housing 1 with the center line of the input shaft 3 as the line of symmetry and are rotatably connected to the housing 1, and are perpendicular to the input shaft 3. The transmission assembly 2 is located inside the housing 1 and is used to link the input shaft 3 and the two output shafts 4, so that when the input shaft 3 rotates, it can simultaneously drive the two output shafts 4 to rotate. In this embodiment, the input shaft 3 and the two output shafts 4 are rotatably connected to the housing 1 through bearings. In this embodiment, a plurality of heat sinks 11 are uniformly fixedly connected to the outer surface of the housing 1. The heat sinks 11 are used to conduct heat out of the housing 1 when the internal structure of the housing 1 is working.

[0033] Reference Figure 2The housing 1 is equipped with a positioning component 7, which includes a positioning ring 71 and a limiting plate 72. The positioning ring 71 is sleeved on the outside of the input shaft 3 and is rotatably connected to the input shaft 3. The bottom wall of the positioning ring 71 is fixedly connected to the bottom wall of the housing 1. Several limiting plates 72 are provided, and the limiting plates 72 are evenly arranged on the outer wall of the positioning ring 71. One end of each limiting plate 72 is fixedly connected to the positioning ring 71, and the other end is fixedly connected to the inner wall of the housing 1. Specifically, the positioning ring 71 and the input shaft 3 are rotatably connected through a bearing.

[0034] Reference Figure 2 The transmission assembly 2 is located above the positioning assembly 7. The transmission assembly 2 includes a drive gear 21 and two driven gears 22. The drive gear 21 is fixedly connected to the input shaft 3. Specifically, the connection method is as follows: a connecting ring 5 is sleeved on the outer side of the input shaft 3, and a support ring 10 is provided on the bottom wall of the connecting ring 5. The bottom wall of the support ring 10 is fixedly connected to the bearing between the positioning ring 71 and the input shaft 3. The connecting ring 5 is slidably connected to the upper surface of the support ring 10. The connecting ring 5 is connected to the input shaft 3. The drive gear 21 is located on the top wall of the connecting ring 5 and is fixedly connected to the connecting ring 5. There are two driven gears 22. The two driven gears 22 are respectively fixedly sleeved on the outer side of the two output shafts 4 and are both meshed with the drive gear 21. When the input shaft 3 rotates, it can drive the connecting ring 5 to rotate. The connecting ring 5 drives the drive gear 21 to rotate. The drive gear 21 drives the two driven gears 22 to rotate. The two driven gears 22 drive the two output shafts 4 to rotate around the housing 1.

[0035] Reference Figures 2-3 A protective component, namely a connecting post 6, is provided between the connecting ring 5 and the input shaft 3. In this embodiment, the connecting posts 6 are arranged in two rows, with four posts in each row. The four connecting posts 6 in each row are evenly distributed around the periphery of the input shaft 3 and are located at the same height. The two rows of connecting posts 6 are arranged correspondingly. One end of each connecting post 6 is fixedly connected to the outer wall of the input shaft 3, and the other end is snapped into the inner wall of the connecting ring 5. Specifically, the snapping method between the connecting post 6 and the connecting ring 5 is as follows: the inner wall of the connecting ring 5 is evenly provided with oblique grooves 51, and the side wall of each connecting post 6 abuts against the side wall of an oblique groove 51. This allows the input shaft 3 to drive the connecting ring 5 to rotate through the interference of the connecting post 6 and the oblique groove 51.

[0036] Reference Figures 2-3 The specific fixed connection method between each connecting post 6 and the input shaft 3 is as follows: the side wall of the connecting ring 5 is provided with an expansion groove 31 corresponding to each connecting post 6, and each expansion groove 31 is provided with a threaded groove corresponding to the connecting post 6. One end of the connecting post 6 is threadedly connected to the threaded groove, and the other end of the connecting post 6 is snapped into the oblique groove 51.

[0037] Reference Figures 2-3A fracture groove 61 is formed on the periphery of the connecting post 6. The fracture groove 61 does not protrude from the surface of the expansion groove 31. When the output shaft 4 stops rotating due to external interference, the output shaft 4 rotates and drives the connecting post 6 to rotate. At this time, the torque of the connecting post 6 increases. After the connecting post 6 interferes with the oblique groove 51, the connecting post 6 breaks at the fracture groove 61. This ensures that the input shaft 3 does not interfere with the connecting ring 5 when it rotates, so the connecting ring 5 is in a stationary state. This will prevent the connecting ring 5 from rotating and driving the driving gear 21 to rotate, but the driven gear 22 will not be able to rotate due to the interference of the output shaft 4, which would cause the driving gear 21 to rub against the two driven gears 22.

[0038] Reference Figures 2-3 A sealing ring 8 is provided near the top of the input shaft 3. The sealing ring 8 is sleeved on the outside of the input shaft 3 and fixedly connected to the input shaft 3, and a gap is left between the sealing ring 8 and the top wall of the connecting ring 5. The sealing ring 8 is used to block the gap between the sealing ring 8 and the input shaft 3 to prevent the connecting column 6 from flying out through the gap after it breaks. A limiting groove is provided on the connecting shaft. The limiting groove is located above the sealing ring 8. A blocking plate 9 is embedded in the limiting groove. The blocking plate 9 is circular in shape and fixedly connected to the limiting groove. In this embodiment, the sealing ring 8 is made of rubber. The blocking plate 9 is provided to increase the blocking strength of the sealing ring 8 against the broken connecting column 6.

[0039] The specific implementation principle of the dual output shaft overload protection gearbox in this application embodiment is as follows: When the input shaft 3 rotates, it can drive the connecting ring 5 to rotate through the connecting column 6. The rotation of the connecting ring 5 drives the drive gear 21 to rotate, the drive gear 21 drives the two driven gears 22 to rotate, and the two driven gears 22 drive the two output shafts 4 to rotate. When the output shaft 4 is unable to rotate due to external force, the input shaft 3 is still rotating, but because the output shaft 4 cannot rotate, the driven gears 22 cannot rotate, so the drive gear 21 and the connecting ring 5 are in a stationary state. Therefore, the rotation of the input shaft 3 will cause the torque on the connecting column 6 to suddenly increase, and the connecting column 6 will break at the fracture groove 61. After the connecting column 6 breaks, the input shaft 3 rotates freely around the inside of the connecting ring 5, and thus cannot transmit the rotational force to the connecting ring 5 and the drive gear 21 through the connecting column 6. This can avoid the friction between the drive gear 21 and the driven gear 22 when the output shaft 4 cannot rotate and the driven gear 22 cannot rotate.

[0040] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A dual output shaft overload protection gearbox characterised in that: The utility model provides a kind of transmission mechanism, including shell (1), transmission assembly (2), input shaft (3) and output shaft (4), input shaft (3) and output shaft (4) are rotatably connected with shell (1);Transmission assembly (2) is arranged in shell (1), transmission assembly (2) is used to link input shaft (3) and output shaft (4), when input shaft (3) rotates, drives output shaft (4) to rotate by transmission assembly (2);Transmission assembly (2) includes driving gear (21) and driven gear (22), driving gear (21) is connected with input shaft (3), and driven gear (22) is meshed with driving gear (21) and is connected with output shaft (4);Driving gear (21) and input shaft (3) between being provided with connecting ring (5), connecting ring (5) is set on the outside of input shaft (3) and is connected with input shaft (3), and driving gear (21) is connected at the top wall of connecting ring (5);Connecting ring (5) and input shaft (3) between being provided with protection piece, and protection piece includes connecting column (6), and both ends of connecting column (6) are connected with connecting ring (5) and input shaft (3) respectively, when torque suddenly increases, connecting column (6) breaks, and connecting ring (5) and input shaft (3) are separated from each other.

2. A dual output shaft overload protection gearbox as claimed in claim 1, characterised in that: The side wall of the connecting ring (5) near the connecting column (6) is uniformly provided with a plurality of oblique grooves (51), one end of the connecting column (6) is connected with the side wall of the input shaft (3), and the other end is matched with the oblique grooves (51).

3. A dual output shaft overload protection gearbox as claimed in claim 1, wherein: The connecting column (6) is provided with a recessed fracture groove (61) on the side.

4. A dual output shaft overload protection gearbox as claimed in claim 1, wherein: The output shaft (4) is provided with a positioning ring (71), and the positioning ring (71) is rotatably connected with the output shaft (4).

5. A dual output shaft overload protection gearbox as claimed in claim 4, characterised in that: The outer wall of the positioning ring (71) and the inner wall of the shell (1) are provided with a limiting plate (72) in front of each other.

6. A dual output shaft overload protection gearbox as claimed in claim 1, characterized in that: The input shaft (3) is provided with a sealing ring (8) near the top end, and the sealing ring (8) is fixedly connected with the input shaft (3).

7. A dual output shaft overload protection gearbox as claimed in claim 2, wherein: The side wall of the input shaft (3) is recessed inward to form an expansion groove (31), and the expansion groove (31) is provided with a threaded groove.

8. A dual output shaft overload protection gearbox as claimed in claim 1, wherein: The outer wall of the shell (1) is uniformly provided with a plurality of heat dissipation fins (11), and the heat dissipation fins (11) are used to dissipate heat inside the shell (1).

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