Agricultural machine chassis drive shaft

Abstract

The utility model relates to agricultural machinery technical field provides an agricultural machinery chassis transmission shaft, including shock protection structure: shock protection structure is coaxially installed in the outside one end of main part structure, main part structure: the main part structure includes axle body, input end spline joint and output end flange joint, input end spline joint is fixedly connected in one end of axle body through welding, shock protection structure: shock protection structure includes shock absorbing cover, dust cover and elastic baffle, shock absorbing cover is covered in the junction of input end spline joint and axle body, and dust cover is sleeved in the outside of axle body, the utility model discloses through setting up shock protection structure, through the auxiliary cooperation between dust cover and shock absorbing cover, makes metal framework and shock absorbing cover integral vulcanization forming, strengthens shock absorbing cover structural strength, can guarantee the dustproof effect of axle body, avoids the abrasion caused by excessive friction in use process again.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a transmission shaft for an agricultural machinery chassis. Background Technology

[0002] The drive shaft of agricultural machinery chassis is the core power transmission component that connects the engine and the chassis drive components. Its performance directly affects the efficiency and stability of agricultural machinery operation.

[0003] Traditional drive shaft joints use rigid connections, which are prone to vibration and abnormal noise under bumpy conditions. Long-term use can easily lead to loosening of the connection, posing a safety hazard. In addition, the surface of the shaft is easily worn by mud and scraped by straw, resulting in a decrease in precision and a significant reduction in power transmission efficiency over time. Utility Model Content

[0004] The purpose of this utility model is to provide a drive shaft for agricultural machinery chassis, in order to solve the defects of existing agricultural machinery chassis drive shafts, such as poor wear resistance, poor vibration stability, and poor dustproof effect.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a transmission shaft for an agricultural machinery chassis, comprising a main structure;

[0006] Vibration damping and protection structure: The vibration damping and protection structure is coaxially installed at one end of the exterior of the main structure;

[0007] Main structure: The main structure includes a shaft body, an input spline joint, and an output flange joint;

[0008] The input spline joint is fixedly connected to one end of the shaft body by welding, and the output flange joint is fixedly connected to the other end of the shaft body by high-strength bolts.

[0009] Vibration damping and protection structure: The vibration damping and protection structure includes a vibration damping sleeve, a dust cover, and an elastic retaining ring;

[0010] The shock-absorbing sleeve is fitted at the connection between the spline joint at the input end and the shaft body, the dust cover is fitted onto the outside of the shaft body, and the elastic retaining ring is fixedly connected to one end of the shock-absorbing sleeve.

[0011] Preferably, the shock-absorbing and protective structure further includes an arc-shaped protrusion, an annular dust-scraping lip, and a metal frame;

[0012] The arc-shaped protrusion is fixedly connected to the inner side of the shock-absorbing sleeve, the annular dust scraper lip is fixedly connected to the inner side of the dust cover, and the metal frame is fixedly connected to the outer side of the shock-absorbing sleeve.

[0013] Preferably, the dust cover has a corrugated structure and is made of polytetrafluoroethylene. One end of the dust cover is fixed to the outer side of the middle part of the shaft body by an elastic retaining ring, and the other end of the dust cover is connected to the chassis housing by bolts.

[0014] Preferably, the dust scraper lip is attached to the outer surface of the shaft body.

[0015] Preferably, the main structure further includes a tungsten carbide wear-resistant coating, a limiting groove, a sealing groove, a balance block, a fluororubber sealing gasket, and an oil injection port;

[0016] The tungsten carbide wear-resistant coating is applied to the outer surface of the shaft body. The limiting groove is opened on the spline tooth surface of the spline joint at the input end. The sealing groove is opened on the flange end face of the flange joint at the output end. The balance block is fixedly connected to the outer side of the middle part of the shaft body. The fluororubber sealing gasket is fixedly connected to the inside of the sealing groove. The oil filling port is fixedly connected to one end of the shaft body.

[0017] Preferably, it also includes a sealing structure;

[0018] The sealing structure includes a sealing cylinder, a circular frame, a through groove, and an auxiliary groove;

[0019] The sealing cylinder is fixedly connected to one end of the oil inlet, the circular frame is fixedly connected to the inside of the sealing cylinder, the through groove is opened on the outside of the sealing cylinder and the circular frame, and the auxiliary groove is opened on the top of the circular frame.

[0020] Preferably, the sealing structure further includes a spring disc, a sealing block, a protrusion, a guide block, and a guide groove;

[0021] The spring disc is rotatably connected to the inside of the circular frame, the guide groove is opened at the top of the spring disc, the guide block is slidably connected to the inside of the guide groove, the sealing block is fixedly connected to the top of the guide block, and the protrusion is fixedly connected to one end of the sealing block.

[0022] The advantages of the agricultural machinery chassis drive shaft provided by this utility model are as follows:

[0023] This invention, by setting a shock-absorbing and protective structure and through the auxiliary cooperation between the dust cover and the shock-absorbing sleeve, allows the metal frame and the shock-absorbing sleeve to be integrally vulcanized and formed, thereby enhancing the structural strength of the shock-absorbing sleeve. This ensures the dustproof effect of the shaft body and avoids wear caused by excessive friction during use.

[0024] Based on the above-mentioned beneficial effects, a sealing structure is provided. Through the auxiliary cooperation between the sealing cylinder and the circular frame, when the rotation formed by the spring disc is released, multiple sets of sealing blocks can slide and converge with each other, forming a sealing barrier inside the front end of the sealing cylinder. This allows workers to easily inject oil into the oil inlet, preventing grease from flowing out and causing waste, thus saving resources. Attached Figure Description

[0025] Figure 1 This is an axonometric view of the present invention;

[0026] Figure 2 This is a three-dimensional schematic diagram of the dust cover of this utility model;

[0027] Figure 3 This is another isometric view of the present invention;

[0028] Figure 4 This is an exploded view of the sealing structure components of this utility model;

[0029] Figure 5 This is a cross-sectional view of the sealing structure of this utility model.

[0030] Explanation of the reference numerals in the figure:

[0031] 11. Shaft body; 12. Input spline joint; 13. Output flange joint; 14. Tungsten carbide wear-resistant coating; 15. Limiting groove; 16. Sealing groove; 17. Balance weight; 18. Fluororubber gasket; 19. Oil inlet;

[0032] 21. Shock-absorbing sleeve; 22. Dust cover; 23. Elastic retaining ring; 24. Arc-shaped protrusion; 25. Annular dust scraper lip; 26. Metal frame;

[0033] 31. Sealing cylinder; 32. Circular frame; 33. Through groove; 34. Auxiliary groove; 35. Spring disc; 36. Sealing block; 37. Protrusion; 38. Guide block; 39. Guide groove. Detailed Implementation

[0034] 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.

[0035] Please see Figures 1-5 The present invention provides a transmission shaft for an agricultural machinery chassis, comprising a main structure;

[0036] Vibration damping and protection structure: The vibration damping and protection structure is coaxially installed at one end of the exterior of the main structure;

[0037] Main structure: The main structure includes a shaft body 11, an input spline joint 12, and an output flange joint 13;

[0038] The input spline joint 12 is fixedly connected to one end of the shaft body 11 by welding, and the output flange joint 13 is fixedly connected to the other end of the shaft body 11 by high-strength bolts.

[0039] The main structure also includes a tungsten carbide wear-resistant coating 14, a limiting groove 15, a sealing groove 16, a balance block 17, a fluororubber sealing gasket 18, and an oil filling port 19;

[0040] Tungsten carbide wear-resistant coating 14 is applied to the outer surface of shaft body 11, limiting groove 15 is opened on the spline tooth surface of input end spline joint 12, sealing groove 16 is opened on the flange end face of output end flange joint 13, balance block 17 is fixedly connected to the middle outer side of shaft body 11, fluororubber sealing gasket 18 is fixedly connected to the inside of sealing groove 16, and oil filling port 19 is fixedly connected to one end of shaft body 11.

[0041] The engine power is transmitted to the shaft body 11 through the spline joint 12 at the input end. The shaft body 11 utilizes the high strength characteristics of 40Cr alloy steel and the wear resistance of tungsten carbide wear-resistant coating 14 to stably transmit the power to the flange joint 13 at the output end, and finally to the chassis drive components to realize the driving and operation of the agricultural machinery.

[0042] Vibration damping and protection structure: The vibration damping and protection structure includes a vibration damping sleeve 21, a dust cover 22, and an elastic retaining ring 23;

[0043] The shock-absorbing sleeve 21 is fitted at the connection between the spline joint 12 at the input end and the shaft body 11, the dust cover 22 is fitted onto the outside of the shaft body 11, and the elastic retaining ring 23 is fixedly connected to one end of the shock-absorbing sleeve 21.

[0044] The shock-absorbing and protective structure also includes an arc-shaped protrusion 24, an annular dust scraper lip 25, and a metal frame 26;

[0045] The arc-shaped protrusion 24 is fixedly connected to the inner side of the shock-absorbing sleeve 21, the annular dust scraper lip 25 is fixedly connected to the inner side of the dust cover 22, and the metal frame 26 is fixedly connected to the outer side of the shock-absorbing sleeve 21.

[0046] The auxiliary cooperation between the dust cover 22 and the shock-absorbing sleeve 21 can ensure the dustproof effect while avoiding wear caused by excessive friction;

[0047] Working principle: During agricultural machinery operation, the drive shaft needs to withstand continuous dynamic loads and complex working conditions and impacts.

[0048] First, the damping sleeve 21 at the connection between the output flange joint 13 and the shaft body, through the arc-shaped protrusion 24, fits tightly against the shaft body and can absorb 30%-40% of the vibration energy. Combined with the dynamic balance correction of the balance block 17, it can significantly reduce vibration and abnormal noise and prevent loosening of the connection.

[0049] Next, the dust cover 22 is made of polytetrafluoroethylene, which has strong weather resistance and can be used stably in high and low temperature operating environments. The compression of the annular dust scraper lip 25 is controlled at 0.5-1mm, which not only ensures the dustproof effect but also avoids wear caused by excessive friction. The metal frame 26 prevents the shock absorber sleeve 21 from being excessively deformed. The corrugated structure of the dust cover 22 can adapt to the axial movement of the drive shaft. The annular dust scraper lip 25 removes dirt and impurities from the shaft surface in real time, preventing them from entering the bearing and joint gap.

[0050] This step ensures the dustproof effect of the shaft body 11 and avoids wear caused by excessive friction during use.

[0051] Please see Figure 3-5 As shown, this embodiment, based on the above embodiment, also includes a sealing structure;

[0052] The sealing structure includes a sealing cylinder 31, a circular frame 32, a through groove 33, and an auxiliary groove 34;

[0053] The sealing cylinder 31 is fixedly connected to one end of the oil inlet 19, the circular frame 32 is fixedly connected to the inside of the sealing cylinder 31, the through groove 33 is opened on the outside of the sealing cylinder 31 and the circular frame 32, and the auxiliary groove 34 is opened on the top of the circular frame 32.

[0054] The sealing structure also includes a spring disc 35, a sealing block 36, a protrusion 37, a guide block 38, and a guide groove 39;

[0055] The spring disc 35 is rotatably connected to the inside of the circular frame 32, the guide groove 39 is opened at the top of the spring disc 35, the guide block 38 is slidably connected to the inside of the guide groove 39, the sealing block 36 is fixedly connected to the top of the guide block 38, and the protrusion 37 is fixedly connected to one end of the sealing block 36.

[0056] The sealing cylinder 31 is used to open the through groove 33, the circular frame 32 is used to open the through groove 33 and the auxiliary groove 34, the spring disc 35 is used to open the guide groove 39, the protrusion 37 is provided through the interior of the auxiliary groove 34, and the guide groove 39 is used to provide space for the guide block 38 to slide.

[0057] With the auxiliary cooperation between the sealing cylinder 31 and the circular frame 32, when the rotation formed on the spring disc 35 is released, multiple sets of sealing blocks 36 can slide and gather together to form a sealing barrier inside the front end of the sealing cylinder 31.

[0058] Working principle: When injecting oil into the inside of the oil inlet 19;

[0059] First, by rotating the spring disc 35 inside the circular frame 32 through the through slot 33, since the protrusion 37 is disposed inside the auxiliary slot 34, the spring disc 35 can rotate while driving the guide block 38 to slide within the guide slot 39.

[0060] Next, the multiple sets of sealing blocks 36 can be retracted into the interior of the circular frame 32. After the oil filling is completed, by releasing the rotation formed on the spring disc 35, the spring disc 35 can be reset under the action of elasticity, thereby allowing the multiple sets of sealing blocks 36 to slide and converge with each other, forming a sealing barrier inside the front end of the sealing cylinder 31.

[0061] This step allows staff to easily inject oil into the oil inlet 19, preventing grease from flowing out and causing waste, thus helping to save resources.

[0062] 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 drive shaft for an agricultural machinery chassis, comprising a main structure, characterized in that: Vibration damping and protection structure: The vibration damping and protection structure is coaxially installed at one end of the exterior of the main structure; Main structure: The main structure includes a shaft body (11), an input spline joint (12), and an output flange joint (13); The input spline joint (12) is fixedly connected to one end of the shaft body (11) by welding, and the output flange joint (13) is fixedly connected to the other end of the shaft body (11) by high-strength bolts; Shock-absorbing and protective structure: The shock-absorbing and protective structure includes a shock-absorbing sleeve (21), a dust cover (22), and an elastic retaining ring (23); The shock-absorbing sleeve (21) is fitted at the connection between the input spline joint (12) and the shaft body (11), the dust cover (22) is fitted on the outside of the shaft body (11), and the elastic retaining ring (23) is fixedly connected to one end of the shock-absorbing sleeve (21).

2. The agricultural machinery chassis drive shaft according to claim 1, characterized in that, The shock-absorbing and protective structure also includes an arc-shaped protrusion (24), an annular dust scraper lip (25), and a metal frame (26); The arc-shaped protrusion (24) is fixedly connected to the inner side of the shock-absorbing sleeve (21), the annular dust scraper lip (25) is fixedly connected to the inner side of the dust cover (22), and the metal frame (26) is fixedly connected to the outer side of the shock-absorbing sleeve (21).

3. The agricultural machinery chassis drive shaft according to claim 2, characterized in that, The dust cover (22) has a corrugated structure and is made of polytetrafluoroethylene. One end of the dust cover (22) is fixed to the outer side of the middle part of the shaft body (11) by an elastic retaining ring (23), and the other end of the dust cover (22) is connected to the chassis housing by bolts.

4. The agricultural machinery chassis drive shaft according to claim 2, characterized in that, The dust scraper lip (25) is attached to the outer surface of the shaft body (11).

5. The agricultural machinery chassis drive shaft according to claim 1, characterized in that, The main structure also includes a tungsten carbide wear-resistant coating (14), a limiting groove (15), a sealing groove (16), a balance block (17), a fluororubber sealing gasket (18), and an oil inlet (19); The tungsten carbide wear-resistant coating (14) is applied to the outer surface of the shaft body (11), the limiting groove (15) is opened on the spline tooth surface of the input end spline joint (12), the sealing groove (16) is opened on the flange end face of the output end flange joint (13), the balance block (17) is fixedly connected to the middle outer side of the shaft body (11), the fluororubber sealing gasket (18) is fixedly connected to the inside of the sealing groove (16), and the oil filling port (19) is fixedly connected to one end of the shaft body (11).

6. The agricultural machinery chassis drive shaft according to claim 1, characterized in that, It also includes a sealing structure; The sealing structure includes a sealing cylinder (31), a circular frame (32), a through groove (33), and an auxiliary groove (34); The sealing cylinder (31) is fixedly connected to one end of the oil inlet (19), the circular frame (32) is fixedly connected to the inside of the sealing cylinder (31), the through groove (33) is opened on the outside of the sealing cylinder (31) and the circular frame (32), and the auxiliary groove (34) is opened on the top of the circular frame (32).

7. The agricultural machinery chassis drive shaft according to claim 6, characterized in that, The sealing structure also includes a spring disc (35), a sealing block (36), a protrusion (37), a guide block (38), and a guide groove (39); The spring disc (35) is rotatably connected to the inside of the circular frame (32), the guide groove (39) is opened at the top of the spring disc (35), the guide block (38) is slidably connected to the inside of the guide groove (39), the sealing block (36) is fixedly connected to the top of the guide block (38), and the protrusion (37) is fixedly connected to one end of the sealing block (36).

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