Protection mechanism for transmission shaft of agricultural machine

Abstract

The utility model belongs to the field of agricultural machinery components, and particularly relates to an agricultural machinery transmission shaft protection mechanism which is assembled on a transmission shaft rod, the transmission shaft rod is provided with a first universal joint fork, the first universal joint fork is provided with a cross adjusting shaft, the cross adjusting shaft is provided with a second universal joint fork, and the second universal joint fork is provided with a connecting shaft rod. The transmission shaft rod and the connecting shaft rod are provided with an adjusting mechanism, the adjusting mechanism comprises an external thread sleeve block, the external thread sleeve block is assembled on the transmission shaft rod and the connecting shaft rod, the external thread sleeve block is provided with a guide rod, the guide rod is provided with a limiting block, the guide rod is provided with a movable block, the movable block is provided with a traction ring, and the traction ring is provided with a conical block; according to the agricultural machinery transmission shaft protection mechanism, through cooperation of the conical block and the movable block, the problems that due to the fact that an existing protection sleeve is a closed sleeve, gas in the protection sleeve is prone to being affected by air temperature, use of a transmission shaft is hindered, and the use effect of the transmission shaft is reduced are solved.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery components, specifically an agricultural machinery transmission shaft protection mechanism. Background Technology

[0002] Agricultural machinery driveshafts are power transmission devices used in modern agricultural machinery. Their main function is to transmit power from tractors or other agricultural machinery to implements such as seeders and harvesters, enabling the machinery to operate normally. Agricultural machinery driveshafts typically consist of universal joint forks, universal joints, telescopic tubes, and protective sleeves. They feature universal joint characteristics, allowing the input and output ends to be on different planes, and can extend and retract within a specified range during operation. This design enables the driveshaft to adapt to different working conditions and angular changes, ensuring the stability and reliability of power transmission.

[0003] To prevent mud, weeds, and other debris from getting caught in the universal joint forks and damaging the driveshaft, existing agricultural machinery driveshafts typically have protective sleeves installed. These sleeves allow the universal joint forks to move within the sleeves. However, existing agricultural machinery driveshafts still have the following problems during use:

[0004] The existing protective sleeve is a sealed sleeve, which prevents mud, weeds and other debris from getting into the universal joint fork on the drive shaft. However, the gas inside the protective sleeve is easily affected by the temperature, which can hinder the use of the drive shaft and reduce its performance. Therefore, it is necessary to develop a protective mechanism for the drive shaft of agricultural machinery for use in the field of existing agricultural machinery components. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, the existing protective sleeve is a sealed sleeve, which makes the gas inside the protective sleeve easily affected by temperature, hindering the use of the drive shaft and reducing the performance of the drive shaft. This utility model proposes a protective mechanism for the drive shaft of agricultural machinery.

[0006] The technical solution adopted by this utility model to solve its technical problem is: an agricultural machinery transmission shaft protection mechanism, comprising:

[0007] A drive shaft assembly, comprising: a first universal joint fork fixedly mounted at both ends of a drive shaft rod; a cross adjustment shaft mounted on each of the first universal joint forks; a second universal joint fork mounted on each of the cross adjustment shafts; and a connecting shaft fixedly mounted on each of the second universal joint forks.

[0008] An adjustment mechanism is provided, comprising an external threaded sleeve block, which is fixedly mounted on the transmission shaft and the connecting shaft respectively. Guide rods are symmetrically fixedly mounted on the end faces of the external threaded sleeve blocks. Limit blocks are fixedly mounted on one end of each guide rod. Movable blocks are movably mounted on each guide rod. Traction rings are fixedly mounted on the end faces of the two movable blocks. Conical blocks are fixedly mounted on each traction ring.

[0009] A protective mechanism, the protective mechanism including a protective sleeve.

[0010] Preferably, each of the external threaded sleeves is threaded with an internal threaded collar.

[0011] Preferably, each of the internally threaded collars has a rotating cavity inside, and each of the end faces of the internally threaded collar has a rotating opening that communicates with the rotating cavity.

[0012] Preferably, each of the rotating cavities is movably fitted with a rotating ring, and multiple traction arc blocks are fixedly fitted on the rotating ring. The traction arc blocks are movably fitted to the rotating opening, and one end of each traction arc block is fixedly fitted to the traction ring.

[0013] Preferably, the protective sleeve is fixedly assembled on the drive shaft and the connecting shaft, and the first universal joint fork and the second universal joint fork are both located inside the protective sleeve.

[0014] Preferably, the protective sleeve has multiple air holes at both ends, and the conical block is movably assembled with the air holes.

[0015] Preferably, a limiting plate is fixedly mounted on one end of each conical block, and the limiting plate is located inside the protective sleeve.

[0016] Preferably, the diameter of the conical block decreases sequentially towards the limiting plate.

[0017] The advantages of this utility model are:

[0018] This invention utilizes an internally threaded collar that rotates on an externally threaded block, causing the rotating cavity on the internally threaded collar to rotate on the rotating ring. The rotating opening moves on the traction arc block, and the traction ring moves via a guide rod. This facilitates the traction ring driving the conical block to move on the air hole, thereby changing the diameter of the air hole for gas flow. This allows the protective sleeve to be adjusted according to the ambient temperature, improving the equipment's performance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the assembly structure of the agricultural machinery transmission shaft, protective mechanism, and adjustment mechanism of this utility model;

[0021] Figure 2 This is a cross-sectional view of the agricultural machinery drive shaft, protective mechanism, and adjustment mechanism assembly of this utility model.

[0022] Figure 3 This is a schematic diagram of the assembly structure of the protective mechanism and the adjustment mechanism of this utility model;

[0023] Figure 4 This is a schematic diagram of the assembly structure of the protective mechanism and the adjustment mechanism of this utility model;

[0024] Figure 5 This is a cross-sectional view of the protective mechanism and adjustment mechanism of this utility model.

[0025] In the picture:

[0026] 10. Drive shaft; 11. First universal joint fork; 12. Cross-shaped adjusting shaft; 13. Second universal joint fork;

[0027] 20. Protective sleeve; 21. External threaded sleeve block; 22. Internal threaded collar; 23. Connecting shaft;

[0028] 30. Air hole; 31. Guide rod; 32. Limiting block; 33. Movable block;

[0029] 40. Traction ring; 41. Conical block; 42. Traction arc block; 43. Limiting plate;

[0030] 50. Rotating cavity; 51. Rotating opening; 52. Rotating ring. Detailed Implementation

[0031] 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 scope of protection of the present utility model.

[0032] The following is in conjunction with the appendix Figure 1 —5 provides further detailed information about this application.

[0033] This application discloses a protective mechanism for the transmission shaft of agricultural machinery. (Refer to...) Figure 2 and Figure 3 as well as Figure 5 A protective mechanism for the transmission shaft of agricultural machinery is provided, which is mounted on a transmission shaft 10. Both ends of the transmission shaft 10 are fixedly fitted with first universal joint forks 11, each first universal joint fork 11 is fitted with a cross-shaped adjusting shaft 12, and each cross-shaped adjusting shaft 12 is fitted with a second universal joint fork 13. Each second universal joint fork 13 is fixedly fitted with a connecting shaft 23. Adjustment mechanisms are mounted on both the transmission shaft 10 and the connecting shaft 23. The adjustment mechanisms include external threaded sleeves 21, which are respectively fixedly mounted with… The guide rods 31 are symmetrically fixedly mounted on the end faces of the external threaded sleeves 21, which are mounted on the drive shaft 10 and the connecting shaft 23. Each guide rod 31 has a limit block 32 fixedly mounted on one end. Each guide rod 31 has a movable block 33, and each movable block 33 has a traction ring 40 fixedly mounted on its end face. Each traction ring 40 has a conical block 41 fixedly mounted on its end face. The movable blocks 33 move on the guide rods 31, causing the movable blocks 33 to drive the conical blocks 41 on the traction ring 40 to move.

[0034] Reference Figure 3 and Figure 4 as well as Figure 5 One end of each conical block 41 is fixedly fitted with a limiting plate 43. Each external threaded sleeve 21 is threadedly fitted with an internal threaded collar 22. Each internal threaded collar 22 has a rotating cavity 50 inside. Each end face of the internal threaded collar 22 has a rotating opening 51, which communicates with the rotating cavity 50. Each rotating cavity 50 is movably fitted with a rotating ring 52. Multiple traction arc blocks 42 are fixedly fitted on the rotating ring 52. The traction arc blocks 42 rotate in relation to the rotating opening 51. One end of each traction arc block 42 is fixedly fitted with a traction ring 40. The internal threaded collar 22 rotates and moves on the external threaded sleeve 21, causing the rotating cavity 50 on the internal threaded collar 22 to rotate on the rotating ring 52. The rotating opening 51 moves on the traction arc block 42. The traction ring 40 moves through the guide rod 31, which facilitates the traction ring 40 to drive the conical block 41 to move.

[0035] Reference Figure 1 - Figure 4A protective sleeve 20 is fixedly mounted on the drive shaft 10 and the connecting shaft 23. The first universal joint fork 11 and the second universal joint fork 13 are both located inside the protective sleeve 20. Multiple air holes 30 are provided at both ends of the protective sleeve 20. The conical block 41 moves on the corresponding air hole 30, and the limiting plate 43 is located inside the protective sleeve 20. The diameter of the conical block 41 decreases sequentially towards the limiting plate 43. By moving the conical block 41 on the air hole 30, the air hole 30 changes the gas flow diameter, which makes it easy for the protective sleeve 20 to be adjusted according to the temperature environment and improves the use effect of the equipment.

[0036] Working principle: The internal threaded collar 22 rotates and moves on the external threaded sleeve block 21, causing the rotating cavity 50 on the internal threaded collar 22 to rotate on the rotating ring 52. The rotating port 51 moves on the traction arc block 42, and the traction ring 40 moves through the guide rod 31, which facilitates the traction ring 40 to drive the conical block 41 to move on the air hole 30, so that the air hole 30 changes the gas flow diameter, which makes it easy for the protective sleeve 20 to be adjusted according to the temperature environment and improves the use effect of the equipment.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An agricultural machine drive shaft protection mechanism, characterized by: Include: The transmission shaft assembly, the transmission shaft assembly includes (10), the two ends of the transmission shaft rod (10) are fixedly equipped with the first universal joint fork (11), the first universal joint fork (11) is equipped with the cross adjusting shaft (12), the cross adjusting shaft (12) is equipped with the second universal joint fork (13), the second universal joint fork (13) is fixedly equipped with the connecting shaft rod (23); Adjusting mechanism, the adjusting mechanism includes an outer threaded sleeve block (21), the outer threaded sleeve block (21) is fixedly equipped on the transmission shaft rod (10) and the connecting shaft rod (23) respectively, the end surface of the outer threaded sleeve block (21) is fixedly equipped with a guide rod (31) symmetrically, one end of the guide rod (31) is fixedly equipped with a limit block (32), the guide rod (31) is movably equipped with a movable block (33), the end surface of the two movable blocks (33) is fixedly equipped with a traction ring (40), the traction ring (40) is fixedly equipped with a tapered block (41); Protective mechanism, the protective mechanism includes a protective sleeve (20).

2. An agricultural machine drive shaft protection mechanism according to claim 1, wherein: The outer threaded sleeve block (21) is threadedly equipped with an inner threaded sleeve ring (22).

3. An agricultural machine drive shaft guard mechanism according to claim 2, characterised in that: The inner threaded sleeve ring (22) is provided with a rotating cavity (50) in the inside, and the end surface of the inner threaded sleeve ring (22) is provided with a rotating port (51), and the rotating port (51) is communicated with the rotating cavity (50).

4. An agricultural machine drive shaft guard mechanism according to claim 3, wherein: The rotating cavity (50) is movably equipped with a rotating ring (52), and the rotating ring (52) is fixedly equipped with a plurality of traction arc blocks (42), and the traction arc blocks (42) are movably equipped with the rotating port (51), and one end of the plurality of traction arc blocks (42) is fixedly equipped with the traction ring (40).

5. An agricultural machine drive shaft protection mechanism according to claim 1, wherein: The protective sleeve (20) is fixedly equipped on the transmission shaft rod (10) and the connecting shaft rod (23), and the first universal joint fork (11) and the second universal joint fork (13) are located in the inside of the protective sleeve (20).

6. An agricultural machine drive shaft protection mechanism according to claim 1, wherein: The two ends of the protective sleeve (20) are provided with a plurality of air holes (30), and the tapered block (41) is movably equipped with the air hole (30).

7. An agricultural machine drive shaft guard mechanism according to claim 6, characterised in that: One end of the tapered block (41) is fixedly equipped with a limiting plate (43), and the limiting plate (43) is located in the inside of the protective sleeve (20).

8. An agricultural machine drive shaft guard mechanism according to claim 7, characterised in that: The diameter value of the tapered block (41) towards the limiting plate (43) direction is sequentially smaller.

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