A type of agricultural machinery drive shaft with a quick-release structure

Abstract

This utility model relates to the field of agricultural machinery drive shaft technology, specifically an agricultural machinery drive shaft with a quick-disassembly structure. It includes a universal joint shaft and a universal joint telescopic shaft, with the telescopic shaft sliding within the universal joint shaft. Both the universal joint shaft and the telescopic shaft are hinged to a universal joint seat via a ten-joint. One end of the universal joint seat has an internal spline that matches the external splines on the power output shaft and power input shaft. A limiting rod is provided on one side of the internal spline to restrict the movement of the power output shaft and power input shaft. A spring is provided between the limiting rod and the universal joint seat. Its advantages include: this quick-disassembly structure uses the limiting rod for positioning, and the limiting rod does not need to be disassembled. The spring force achieves automatic locking and limiting. Pressing the limiting rod down quickly releases its limitation, allowing the output shaft and input shaft to be quickly disassembled and replaced when needed, improving the assembly and disassembly efficiency of the drive shaft assembly.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery drive shaft technology, specifically an agricultural machinery drive shaft with a quick-disassembly structure. Background Technology

[0002] Agricultural machinery drive shafts are used for power transmission in modern agricultural machinery, most commonly between tractors and implements or between the power output and input of the agricultural machinery itself, thus enabling the agricultural machinery to operate normally. At the same time, the shaft has the characteristic of universal transmission, and the input end and output end do not have to be on the same plane. Depending on the type and structure of the agricultural machinery drive shaft, the included angle between the output end and the input end can reach 0-80°, and it can extend and retract left and right within a specified range during operation.

[0003] In existing technologies, the drive shaft and driven shaft of agricultural machinery are generally fixedly connected by couplings and multiple bolts. This fixing method is relatively simple and effective, but the process is cumbersome. When the agricultural machinery drive shaft needs to be replaced, the replacement time is long and the labor cost is high. In addition, the agricultural machinery drive shaft is easily affected by external factors during use, which leads to accelerated wear of the agricultural machinery drive shaft, reduces the service life of the agricultural machinery drive shaft, and has poor practicality. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution: an agricultural machinery drive shaft with a quick-disassembly structure, comprising a universal hinge shaft 4 and a universal hinge telescopic shaft 5. One end of the universal hinge telescopic shaft 5 is a hexagonal shaft and can slide within a hexagonal hole at one end of the universal hinge shaft 4. Both the universal hinge shaft 4 and the universal hinge telescopic shaft 5 are hinged to the universal hinge seat 2 via a ten-way connector. The power output shaft 1 of the tractor and the power input shaft 8 of the agricultural implement are connected to the universal hinge seat 2. The feature is that: one end of the universal hinge seat 2 is provided with an internal spline 11 that matches the external spline 15 on the power output shaft 1 and the power input shaft 8, and one side of the internal spline 11 is provided with a limiting rod 3 that restricts the movement of the power output shaft 1 and the power input shaft 8. A spring 7 is provided between the limiting rod 3 and the universal hinge seat 2.

[0005] The upper end of the limiting rod 3 is an eccentric upper guide shaft 14, and the diameter of the upper guide shaft 14 is smaller than the diameter of the lower end; the universal hinge seat 2 is also provided with an upper guide hole 12 and a lower guide hole 13 that cooperate with the limiting rod 3.

[0006] The universal joint seat 2 is provided with annular reinforcing rib 9 and limiting rod reinforcing rib 10. The limiting rod reinforcing rib 10 is located on both sides of the upper guide hole 12 and the lower guide hole 13. The annular reinforcing rib 9 is concentric with the inner spline 11 and connected to the limiting rod reinforcing rib 10.

[0007] The upper end of the guide shaft 14 on the limiting rod is provided with an anti-loosening bolt 6, and the spring 7 is coaxial with the guide shaft 14 on the limiting rod.

[0008] The diameter of the limiting groove 16 on the power output shaft 1 and the power input shaft 8 is 1-2 mm larger than the diameter of the lower end of the limiting rod 3.

[0009] This utility model has the following beneficial effects: The quick disassembly structure is positioned by a limiting rod, and the limiting rod does not need to be disassembled. The spring force achieves automatic locking and limiting. Pressing the limiting rod to sink it can quickly release the limiting rod's limitation, so that the output shaft and input shaft can be quickly disassembled and replaced when needed, improving the disassembly and assembly efficiency of the transmission shaft assembly. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 yes Figure 1 A schematic diagram of the structure of the universal joint seat (2);

[0012] Figure 3 yes Figure 2 Sectional view of AA;

[0013] Figure 4 yes Figure 1 A schematic diagram of the structure of the middle limiting rod (3);

[0014] Figure 5 This is a structural schematic diagram of the power output shaft (1) and the power input shaft (8);

[0015] Figure 6 yes Figure 1 A cross-sectional view of BB.

[0016] In the diagram: 1. Power output shaft, 2. Universal hinge seat, 3. Limiting rod, 4. Universal hinge shaft, 5. Universal hinge telescopic shaft, 6. Anti-loosening bolt, 7. Spring, 8. Power input shaft, 9. Annular reinforcing rib, 10. Limiting rod reinforcing rib, 11. Internal spline, 12. Upper guide hole, 13. Lower guide hole, 14. Upper guide shaft of limiting rod, 15. External spline, 16. Limiting groove. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-6 This utility model provides a technical solution: it includes a universal hinge shaft 4 and a universal hinge telescopic shaft 5. One end of the universal hinge telescopic shaft 5 is a hexagonal shaft and can slide in the hexagonal hole at one end of the universal hinge shaft 4. Both the universal hinge shaft 4 and the universal hinge telescopic shaft 5 are hinged to the universal hinge seat 2 through a ten-way connector. The power output shaft 1 and the power input shaft 8 are provided with external splines 15 and limiting grooves 16. One end of the universal hinge seat 2 is provided with an internal spline 11 matching the external spline 15. The power output shaft 1 and the power input shaft 8 are connected to the universal hinge seat 2 through splines.

[0019] To achieve rapid positioning, a limiting rod 3 is provided on one side of the internal spline 11 on the universal joint 2 to restrict the movement of the power output shaft 1 and the power input shaft 8. The upper end of the limiting rod 3 is an eccentric upper guide shaft 14, and the diameter of the upper guide shaft 14 is smaller than the diameter of the lower end. The universal joint 2 is also provided with an upper guide hole 12 and a lower guide hole 13 that cooperate with the limiting rod 3. The upper guide hole 12 cooperates with the upper guide shaft 14, and the upper end of the upper guide shaft 14 is provided with an anti-loosening bolt 6. The spring 7 is coaxial with the upper guide shaft 14 and is located between the anti-loosening bolt 6 and the universal joint 2. The spring 7 provides the limiting rod 3 with a return force.

[0020] The diameter of the limiting groove 16 on the power output shaft 1 and the power input shaft 8 is 1-2 mm larger than the diameter of the lower end of the limiting rod 3, so that the limiting rod 3 can be better limited.

[0021] To improve overall strength, the universal joint seat 2 is provided with annular reinforcing rib 9 and limiting rod reinforcing rib 10. The limiting rod reinforcing rib 10 is located on both sides of the upper guide hole 12 and the lower guide hole 13. The annular reinforcing rib 9 is concentric with the inner spline 11 and connected to the limiting rod reinforcing rib 10.

[0022] For details on the limiting principle, please refer to... Figure 6 :

[0023] When installing the power output shaft 1 and power input shaft 8, insert the external spline 15 into the internal spline 11 inside the universal joint 2, and simultaneously press the anti-loosening bolt 6 to lower the limiting rod 3. Once pressed into place, the power output shaft 1 and power input shaft 8 can continue to move to the end in the universal joint 2 and will not move further. Finally, loosen the anti-loosening bolt 6, and the limiting rod 3 returns to its initial position. The large-diameter shaft below is then inserted into the limiting groove 16, preventing the power output shaft 1 and power input shaft 8 from moving. When disassembly is required, press the anti-loosening bolt 6 to lower the limiting rod 3, and then pull out the power output shaft 1 and power input shaft 8.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transmission shaft for agricultural machinery with a quick-detachable structure, comprising a universal joint shaft (4) and a universal joint telescopic shaft (5), one end of the universal joint telescopic shaft (5) being a hexagonal shaft that can slide within a hexagonal hole at one end of the universal joint shaft (4), and both the universal joint shaft (4) and the universal joint telescopic shaft (5) being hinged to a universal joint seat (2) via a ten-way connector, wherein the power output shaft (1) of a tractor and the power input shaft (8) of an agricultural implement are connected to the universal joint seat (2), characterized in that: The universal joint seat (2) is provided with an internal spline (11) at one end, which is matched with the external spline (15) on the power output shaft (1) and the power input shaft (8). A limiting rod (3) is provided on one side of the internal spline (11) to restrict the movement of the power output shaft (1) and the power input shaft (8). A spring (7) is provided between the limiting rod (3) and the universal joint seat (2).

2. The agricultural machinery transmission shaft with quick detachable structure according to claim 1, characterized in that: The upper end of the limiting rod (3) is an eccentric upper guide shaft (14), and the diameter of the upper guide shaft (14) is smaller than the diameter of the lower end; the universal hinge seat (2) is also provided with an upper guide hole (12) and a lower guide hole (13) that cooperate with the limiting rod (3).

3. The agricultural machinery transmission shaft with quick detachable structure according to claim 2, characterized in that: The universal hinge seat (2) is provided with annular reinforcing rib (9) and limiting rod reinforcing rib (10). The limiting rod reinforcing rib (10) is located on both sides of the upper guide hole (12) and the lower guide hole (13). The annular reinforcing rib (9) is concentric with the inner spline (11) and connected to the limiting rod reinforcing rib (10).

4. The agricultural machinery transmission shaft with quick detachable structure according to claim 2, characterized in that: The upper end of the guide shaft (14) of the limiting rod is provided with an anti-loosening bolt (6), and the spring (7) is coaxial with the guide shaft (14) of the limiting rod.

5. The agricultural machinery transmission shaft with quick detachable structure according to claim 1, characterized in that: The diameter of the limiting groove (16) on the power output shaft (1) and power input shaft (8) is 1-2 mm larger than the diameter of the lower end of the limiting rod (3).

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