Fertilizer distributor transmission shaft with overload protection function

Abstract

The invention relates to the technical field of fertilizer distributors, and discloses a fertilizer distributor transmission shaft with an overload protection function, the fertilizer distributor transmission shaft comprises an output shaft, a connecting and prompting mechanism and a shearing sleeve, one side of the shearing sleeve is fixedly provided with a connecting sleeve through a shearing bolt, and one side of the connecting sleeve is connected with the input shaft through a second universal joint. According to the fertilizer distributor with the overload protection function, the transmission shaft and the output shaft rotate relative to the connecting flange, the overload protection function is conveniently achieved, at the moment, a knocking block automatically knocks a hollow cylinder to make a sound, meanwhile, a prompting rod extends out of an oil pipe, the prompting function is conveniently achieved, and when residual fertilizer hardening in a fertilizer box is placed for a long time on a conveying belt, the conveying belt is not damaged. And when sundries such as iron blocks and branches mixed in the barnyard manure cause blockage on moving parts of the fertilizer spreader, the shearing bolt is automatically disconnected, and the shearing sleeve and the connecting sleeve can rotate relatively, so that an overload protection effect is conveniently achieved, and the situation that a tractor and the fertilizer spreader are damaged by forcibly outputting power to the transmission shaft is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of fertilizer spreaders, and specifically to a transmission shaft of a fertilizer spreader with an overload protection function. Background Technique

[0002] A fertilizer spreader is an agricultural machine that evenly scatters fertilizers onto the fields. A common fertilizer spreader consists of a fertilizer tank, a spreading mechanism, a conveyor belt, a transmission shaft, and a walking frame. The fertilizer is stored in the fertilizer tank. During use, a tractor transmits power to the conveyor belt and the spreading mechanism through the transmission shaft. The fertilizer in the fertilizer tank is output from the discharge port of the fertilizer tank under the drive of the lower conveyor belt and is scattered by the spreading mechanism.

[0003] In real life, according to the growth law of crops, the use of fertilizer spreaders is seasonal. The fertilizer remaining in the fertilizer tank after long-term storage will caking on the conveyor belt. In addition, sundries such as iron blocks and branches that may be mixed in the manure will also cause jams to the moving parts of the fertilizer spreader. At this time, if power is forcibly output to the transmission shaft, it will cause damage to the tractor and the fertilizer spreader, and serious safety accidents may also occur. In view of the above problems, it is necessary to improve the existing equipment. Summary of the Invention

[0004] The purpose of the present invention is to provide a transmission shaft of a fertilizer spreader with an overload protection function to solve the problems mentioned in the above background technique that in real life, according to the growth law of crops, the use of fertilizer spreaders is seasonal. The fertilizer remaining in the fertilizer tank after long-term storage will caking on the conveyor belt. In addition, sundries such as iron blocks and branches that may be mixed in the manure will also cause jams to the moving parts of the fertilizer spreader. At this time, if power is forcibly output to the transmission shaft, it will cause damage to the tractor and the fertilizer spreader, and serious safety accidents may also occur.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A transmission shaft of a fertilizer spreader with an overload protection function includes an output shaft, a connection and prompting mechanism, and a shear sleeve. A friction shaft sleeve is fixed on the outer side of the output shaft. The output shaft is rotatably connected with a pressing flange through a bearing. A square block is fixed at one end of the output shaft. A first friction plate is fixed on one side of the pressing flange.

[0006] The connection and prompting mechanism includes a connection flange, a second friction plate is fixed on one side of the connection flange, the friction bushing is clamped between the first friction plate and the second friction plate, a first groove is formed on one side of the connection flange, a ferrule is rotatably connected in the first groove, the ferrule is snap-fitted on the outer side of the square block, a screw rod penetrates through the pressing flange and the connection flange, the other side of the connection flange is connected to a fixed sleeve through a first universal joint, a transmission shaft is fixed between the fixed sleeve and the shear sleeve through a fixing bolt, one side of the shear sleeve is fixed with a connection sleeve through a shear bolt, and one side of the connection sleeve is connected to an input shaft through a second universal joint.

[0007] Preferably, a first rotating shaft is fixed on one side of the ferrule, and an extrusion disc is fixed on the outer side of the first rotating shaft. A second groove is formed in the connection flange, and the extrusion disc is rotatably connected in the second groove.

[0008] Preferably, a movable rod is slidably connected in the first groove, and the movable rod is connected to the connection flange through a first spring. One end of the movable rod is fixed with a knocking block, and a hollow cylinder is fixed at the bottom of the connection flange.

[0009] Preferably, one end of the first rotating shaft is fixed with a lead screw, and a moving sleeve is threadedly connected to the outer side of the lead screw. A limiting ring is fixed in the connection flange, and the moving sleeve penetrates through the limiting ring and is connected to a first piston.

[0010] Preferably, an oil pipe is fixed in the connection flange. The first piston is slidably connected in the head end of the oil pipe. A second spring is fixed at the inner bottom of the first piston, and one end of the second spring is fixed with a resisting block.

[0011] Preferably, a second piston is slidably connected in the tail end of the oil pipe, and a prompting rod is fixed at the top of the second piston. The prompting rod penetrates through the top of the oil pipe.

[0012] Preferably, one side of the connection flange is connected to a gasket through a third spring, and one end of the screw rod is threadedly connected to a nut.

[0013] Preferably, a second rotating shaft is fixed on one side of the shear sleeve, and the connection sleeve is rotatably connected to the outer side of the second rotating shaft.

[0014] Preferably, balls are movably connected to the outer side of the second rotating shaft, and the balls are circumferentially and uniformly distributed on the second rotating shaft.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The drive shaft of the fertilizer spreader with overload protection function can achieve the purpose of relative rotation prompt. The input shaft is connected to the driving device of the tractor, and the output shaft is connected to the conveyor belt and the spreading mechanism. The tractor transmits power to the conveyor belt and the spreading mechanism through this device. The fertilizer in the fertilizer tank is output from the discharge port of the fertilizer tank driven by the lower conveyor belt and is spread by the spreading mechanism. When the friction shaft sleeve, the first friction plate and the second friction plate are severely worn and the friction force decreases, the output shaft rotates relative to the connecting flange, which is convenient for overload protection. At this time, the knocking block automatically knocks on the hollow cylinder to make a sound, and at the same time, the prompt rod extends out of the oil pipe, which is convenient for prompting.

[0017] 2. The drive shaft of the fertilizer spreader with overload protection function can achieve the purpose of overload protection. When the fertilizer remaining in the fertilizer tank is caked on the conveyor belt after being placed for a long time, and the sundries such as iron blocks and branches mixed in the manure jam the moving parts of the fertilizer spreader, the shear bolt automatically breaks, and the shear sleeve and the connecting sleeve can rotate relative to each other, which is convenient for overload protection and avoids forcibly outputting power to the drive shaft to damage the tractor and the fertilizer spreader. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 It is a bottom view three-dimensional structural schematic diagram of the present invention;

[0020] Figure 3 It is a front view sectional structural schematic diagram of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the connection and prompt mechanism of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the connection of the ferrule, the first rotating shaft, the extrusion disc, the movable rod, the first spring, the knocking block, the moving sleeve, the limiting ring, the oil pipe and the prompt rod of the present invention.

[0023] In the figure: 1. Output shaft; 2. Friction bushing; 3. Compression flange; 4. Bearing; 5. Square block; 6. First friction plate; 7. Connection and prompting mechanism; 701. Connection flange; 702. Second friction plate; 703. First groove; 704. Ferrule; 705. First rotating shaft; 706. Second groove; 707. Extrusion disc; 708. Movable rod; 709. First spring; 710. Knocking block; 711. Hollow cylinder; 712. Lead screw; 713. Moving sleeve; 714. Limit ring; 715. First piston; 716. Oil pipe; 717. Second spring; 718. Second piston; 719. Prompting rod; 8. Screw; 9. Nut; 10. Third spring; 11. First universal joint; 12. Fixed sleeve; 13. Transmission shaft; 14. Shearing sleeve; 15. Fixed bolt; 16. Second rotating shaft; 17. Ball; 18. Connection sleeve; 19. Shearing bolt; 20. Second universal joint; 21. Input shaft. Detailed implementation manner

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0025] Please refer to Figures 1 to 5 , the present invention provides a technical solution: a transmission shaft of a fertilizer spreader with an overload protection function, including an output shaft 1, a connection and prompting mechanism 7 and a shearing sleeve 14. A friction bushing 2 is fixed on the outer side of the output shaft 1. The outer side of the output shaft 1 is rotatably connected to a compression flange 3 through a bearing 4. One end of the output shaft 1 is fixed with a square block 5, and one side of the compression flange 3 is fixed with a first friction plate 6.

[0026] The connection and prompting mechanism 7 includes a connection flange 701. One side of the connection flange 701 is fixed with a second friction plate 702. The friction bushing 2 is clamped between the first friction plate 6 and the second friction plate 702. A first groove 703 is opened on one side of the connection flange 701. A ferrule 704 is rotatably connected in the first groove 703. The ferrule 704 is snap-connected to the outer side of the square block 5. A screw 8 passes through the compression flange 3 and the connection flange 701. The other side of the connection flange 701 is connected to a fixed sleeve 12 through a first universal joint 11. A transmission shaft 13 is fixed between the fixed sleeve 12 and the shearing sleeve 14 through a fixed bolt 15. One side of the shearing sleeve 14 is fixed with a connection sleeve 18 through a shearing bolt 19. One side of the connection sleeve 18 is connected to an input shaft 21 through a second universal joint 20.

[0027] In this embodiment, as Figure 3 , Figure 4and Figure 5 As shown, a first rotating shaft 705 is fixed to one side of the ferrule 704, and an extrusion disk 707 is fixed to the outer side of the first rotating shaft 705, a second groove 706 is opened in the connecting flange 701, and the extrusion disk 707 is rotatably connected in the second groove 706. When the ferrule 704 rotates in the first groove 703, the first rotating shaft 705 and the extrusion disk 707 rotate together with the ferrule 704.

[0028] In this embodiment, Figure 3 , Figure 4 and Figure 5 As shown, a movable rod 708 is slidably connected in the first groove 703, and the movable rod 708 is connected to the connecting flange 701 through a first spring 709, a knocking block 710 is fixed at one end of the movable rod 708, and a hollow cylinder 711 is fixed at the bottom of the connecting flange 701. When the friction sleeve 2, the first friction plate 6 and the second friction plate 702 are worn to affect the friction effect, the connecting flange 701 rotates relative to the output shaft 1, and the ferrule 704 rotates in the first groove 703. The rotation of the ferrule 704 drives the first rotating shaft 705 and the extrusion disk 707 to rotate. When the extrusion disk 707 squeezes the movable rod 708, the movable rod 708 moves to the right. When the extrusion disk 707 releases the squeezing of the movable rod 708, the movable rod 708 automatically rebounds under the action of the first spring 709, and the knocking block 710 automatically rebounds and knocks the hollow cylinder 711 to make a sound, which conveniently serves as a wear prompt.

[0029] In this embodiment, Figure 3 , Figure 4 and Figure 5 As shown, a screw rod 712 is fixed at one end of the first rotating shaft 705, and a movable sleeve 713 is threadedly connected to the outer side of the screw rod 712, a limiting ring 714 is fixed in the connecting flange 701, and the movable sleeve 713 passes through the limiting ring 714 and is connected to the first piston 715. When the first rotating shaft 705 rotates to drive the screw rod 712 to rotate, the movable sleeve 713 can move to the left under the limiting action of the screw rod 712 and the limiting ring 714, thereby driving the first piston 715 to move to the left.

[0030] In this embodiment, Figure 3 , Figure 4 and Figure 5 As shown, an oil pipe 716 is fixed in the connecting flange 701, and the first piston 715 is slidably connected in the head end of the oil pipe 716. A second spring 717 is fixed to the inner bottom of the first piston 715, and a stop block is fixed at one end of the second spring 717. The second spring 717 supports the stop block. When the first piston 715 moves to the left to the bottom, the stop block resists the first piston 715 and the movable sleeve 713 to prevent the movable sleeve 713 from completely disengaging from the screw rod 712.

[0031] In this embodiment,Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown in Figure 4 and Figure 5 , a second piston 718 is slidably connected inside the end of the oil pipe 716, and a tip rod 719 is fixed to the top of the second piston 718. The tip rod 719 penetrates through the top of the oil pipe 716. The oil pipe 716 stores hydraulic oil. When the first piston 715 moves leftward, the second piston 718 moves upward under the action of oil pressure, thereby driving the tip rod 719 to move upward. The tip rod 719 extends out of the oil pipe 716, which is convenient for indicating that the output shaft 1 and the connecting flange 701 have rotated relative to each other.

[0032] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown in Figure 1 , Figure 2 and Figure 3 , one side of the connecting flange 701 is connected to the gasket through a third spring 10. One end of the screw rod 8 is threadedly connected with a nut 9. After connecting the pressing flange 3 and the knocking block 710 together by using the screw rod 8, the nut 9 can be tightened, which is convenient for playing a role in connection and fixation.

[0033] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown in Figure 1 , Figure 2 and Figure 3 , a second rotating shaft 16 is fixed to one side of the shear sleeve 14. The connecting sleeve 18 is rotatably connected to the outside of the second rotating shaft 16. After the shear bolt 19 is broken, the shear sleeve 14 and the connecting sleeve 18 can rotate relative to each other, and the second rotating shaft 16 rotates inside the connecting sleeve 18.

[0034] In this embodiment, as Figure 3 As shown in Figure 3 , ball bearings 17 are movably connected to the outside of the second rotating shaft 16, and the ball bearings 17 are circumferentially and evenly distributed on the second rotating shaft 16. When the second rotating shaft 16 rotates inside the connecting sleeve 18, the ball bearings 17 roll, which is convenient for reducing the friction between the second rotating shaft 16 and the connecting sleeve 18.

[0035] The usage method and advantages of the present invention: The drive shaft of the fertilizer spreader with an overload protection function works as follows:

[0036] As Figures 1 to 5As shown in the figure: First, use the screw 8 and the nut 9 to fix the pressing flange 3 and the connecting flange 701 together, then use the shear bolt 19 to fix the shear sleeve 14 and the connecting sleeve 18 together. The input shaft 21 is connected to the driving device of the tractor, and the output shaft 1 is connected to the conveyor belt and the spreading mechanism. The tractor transmits power to the conveyor belt and the spreading mechanism through this device. The fertilizer in the fertilizer tank is output from the discharge port of the fertilizer tank driven by the lower conveyor belt and is spread by the spreading mechanism. When the friction bush 2, the first friction plate 6, and the second friction plate 702 are severely worn and the frictional force decreases, the output shaft 1 rotates relative to the connecting flange 701, and the ferrule 704 rotates in the first groove 703, thereby driving the first rotating shaft 705 and the pressing disk 707 to rotate. The pressing disk 707 first squeezes the movable rod 708 and the knocking block 710 to move to the right. When the pressing disk 707 releases the extrusion of the movable rod 708, the movable rod 708 and the knocking block 710 automatically bounce off and knock on the hollow cylinder 711 to make a sound for prompting. At the same time, the lead screw 712 rotates, the moving sleeve 713 and the first piston 715 move to the left, the second piston 718 and the prompting rod 719 move upward, and the prompting rod 719 extends out of the oil pipe 716 to prompt that the output shaft 1 has rotated relative to the connecting flange 701. When the fertilizer remaining in the fertilizer tank is caked on the conveyor belt after being placed for a long time, and sundries such as iron blocks and branches mixed in the manure jam the moving parts of the fertilizer spreader, the shear bolt 19 automatically breaks, and the connecting sleeve 18 and the shear sleeve 14 can rotate relative to each other, which is convenient for overload protection and can avoid forcibly outputting power to the drive shaft 13 to damage the tractor and the fertilizer spreader.

[0037] In summary, the drive shaft of the fertilizer spreader with overload protection function achieves the purpose of relative rotation prompt and overload protection, meeting people's usage requirements.

[0038] The above shows and describes the basic principles, main features, and advantages of the present invention. Technical staff in this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

[0039] The orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and is a simplified description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the protection content of the present invention.

[0040] 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fertilizer spreader drive shaft with an overload protection function, comprising an output shaft (1), a connection and prompting mechanism (7) and a shear sleeve (14), characterized in that: A friction bushing (2) is fixed to the outside of the output shaft (1). A pressing flange (3) is rotatably connected to the outside of the output shaft (1) through a bearing (4). A square block (5) is fixed to one end of the output shaft (1). A first friction plate (6) is fixed to one side of the pressing flange (3). The connection and prompting mechanism (7) includes a connection flange (701). A second friction plate (702) is fixed to one side of the connection flange (701). The friction bushing (2) is clamped between the first friction plate (6) and the second friction plate (702). A first groove (703) is formed in one side of the connection flange (701). A collar (704) is rotatably connected in the first groove (703). The collar (704) is snap-connected to the outside of the square block (5). A screw (8) passes through the pressing flange (3) and the connection flange (701). The other side of the connection flange (701) is connected to a fixed sleeve (12) through a first universal joint (11). A transmission shaft (13) is fixed between the fixed sleeve (12) and a shear sleeve (14) through a fixing bolt (15). One side of the shear sleeve (14) is fixed to a connection sleeve (18) through a shear bolt (19). One side of the connection sleeve (18) is connected to an input shaft (21) through a second universal joint (20).

2. The drive shaft of a fertilizer spreader with an overload protection function according to claim 1, characterized in that: A first rotating shaft (705) is fixed to one side of the collar (704), and an extrusion disc (707) is fixed to the outside of the first rotating shaft (705). A second groove (706) is formed in the connection flange (701). The extrusion disc (707) is rotatably connected in the second groove (706).

3. A fertilizer spreader drive shaft with an overload protection function according to claim 1, characterized in that: A movable rod (708) is slidably connected in the first groove (703), and the movable rod (708) is connected to the connection flange (701) through a first spring (709). A knocking block (710) is fixed to one end of the movable rod (708). A hollow cylinder (711) is fixed to the bottom of the connection flange (701).

4. A fertilizer spreader drive shaft with an overload protection function according to claim 2, characterized in that: A lead screw (712) is fixed to one end of the first rotating shaft (705), and a moving sleeve (713) is threadedly connected to the outside of the lead screw (712). A limiting ring (714) is fixed in the connection flange (701). The moving sleeve (713) passes through the limiting ring (714) and is connected to a first piston (715).

5. The drive shaft of a fertilizer spreader with an overload protection function according to claim 4, characterized in that: An oil pipe (716) is fixed in the connection flange (701). The first piston (715) is slidably connected to the inner part of the head end of the oil pipe (716). A second spring (717) is fixed to the inner bottom of the first piston (715), and one end of the second spring (717) is fixed to a resisting block.

6. The drive shaft of a fertilizer spreader with an overload protection function according to claim 5, characterized in that: A second piston (718) is slidably connected to the inner part of the tail end of the oil pipe (716), and a prompting rod (719) is fixed to the top of the second piston (718). The prompting rod (719) passes through the top of the oil pipe (716).

7. A fertilizer spreader drive shaft with an overload protection function according to claim 1, characterized in that: One side of the connection flange (701) is connected to a gasket through a third spring (10). One end of the screw (8) is threadedly connected to a nut (9).

8. A fertilizer spreader drive shaft with an overload protection function according to claim 1, characterized in that: One side of the shear sleeve (14) is fixed with a second rotating shaft (16), and the connecting sleeve (18) is rotatably connected to the outside of the second rotating shaft (16).

9. The drive shaft of a fertilizer spreader with an overload protection function according to claim 8, characterized in that: A ball (17) is movably connected to the outside of the second rotating shaft (16), and the balls (17) are circumferentially and uniformly distributed on the second rotating shaft (16).

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