Hydraulic shaft of farming subsoiler

Abstract

The utility model relates to the field of agricultural cultivator spare and accessory parts, in particular to a hydraulic shaft of an agricultural subsoiler, which comprises a middle section and a connecting section, one end of the connecting section is coaxially connected to one end of the middle section, the connecting section is used for connecting required parts, and the cross-sectional area of the middle section is larger than that of the connecting section. External force borne by the hydraulic shaft in the working process is mainly tensile force or pressure, and at the moment, tensile and compressive stress borne by all sections, perpendicular to the axis of the hydraulic shaft, of the hydraulic shaft is inversely proportional to the area of the sections. The larger the cross section area of the middle section is, the smaller the tensile and compressive stress is. The larger the cross section area of the middle section made of the same material is, the larger the tensile force or pressure can be borne, the structural strength of the middle section can be improved, the service life of the middle section is prolonged, and then the service life of the whole hydraulic shaft is prolonged.

Description

Technical Field

[0001] The present application relates to the field of agricultural machinery spare parts, and in particular to a hydraulic shaft of an agricultural deep tilling machine. Background Art

[0002] With the development of mechanization in modern agriculture, agricultural machinery is now widely used to replace manual labor in agricultural tillage, ridge formation, trenching, soil loosening, seed burying, forestry reclamation and other related operations.

[0003] Agricultural machinery is equipped with components for tilling land, ridging, furrowing, loosening soil, and burying seeds. Hydraulic cylinders are used to adjust the height of such components from the ground or the depth of such components below the ground. The hydraulic shaft in the hydraulic cylinder is the most stressed component in the hydraulic cylinder. The hydraulic shaft is the main component for transmitting force in the hydraulic cylinder. It bears the thrust and pull from the piston, as well as the load from the outside. Insufficient structural strength of the hydraulic shaft can easily cause the hydraulic shaft to bend or break, affecting the service life of the hydraulic shaft. Utility Model Content

[0004] In order to enhance the structural strength of the hydraulic shaft and increase the service life of the hydraulic shaft, the present application provides a hydraulic shaft of an agricultural subsoiler.

[0005] The hydraulic shaft of a farming subsoiler provided in this application adopts the following technical solution:

[0006] A hydraulic shaft of an agricultural subsoiler comprises a middle section and a connecting section, one end of the connecting section is coaxially connected to one end of the middle section, the connecting section is used for connecting required components, and the cross-sectional area of ​​the middle section is larger than that of the connecting section.

[0007] By adopting the above technical solution, the external force on the hydraulic shaft during operation is mainly tension or pressure. At this time, the tensile and compressive stresses on each section of the hydraulic shaft perpendicular to the axis of the hydraulic shaft are inversely proportional to the cross-sectional area. The larger the cross-sectional area of ​​the middle section, the smaller the tensile and compressive stresses. The larger the cross-sectional area of ​​the middle section of the same material, the greater the tension or pressure it can withstand, which helps to improve the structural strength of the middle section, increase the service life of the middle section, and thus increase the service life of the hydraulic shaft as a whole.

[0008] Preferably, the cross-section of the middle section is circular.

[0009] By adopting the above technical solution, when the cross-sectional area is the same, the stress distribution of the circular cross-section is more uniform, stress concentration is reduced, and the service life of the middle section is increased.

[0010] Preferably, chamfers are provided on the outer peripheries of both ends of the middle section.

[0011] By adopting the above technical solution, the two ends of the middle section are provided with chamfers, which helps to improve the stress distribution at the two ends of the middle section, reduce the stress concentration phenomenon at the end surface where the middle section and the connecting section are connected, reduce the structural stress of the end surface of the middle section, improve the structural strength of the hydraulic shaft, and increase the service life of the hydraulic shaft. The chamfers play a guiding role in the installation of the hydraulic shaft, making it easier for the hydraulic shaft to be embedded in the hydraulic cylinder body.

[0012] Preferably, a rounded corner is provided at the connection between the chamfer 1 and the end surface of the middle section.

[0013] By adopting the above technical solution, the fillet is connected with the chamfer, which further improves the stress distribution at the end face of the middle section, reduces the stress concentration at the end face, reduces the structural stress of the middle section, improves the structural strength of the middle section, and increases the service life of the middle section.

[0014] Preferably, the distance between an end of the chamfer close to the connecting section and the axis of the middle section is greater than the radius of the connecting section.

[0015] By adopting the above technical solution, the end face area of ​​the middle section is larger than the cross-sectional area of ​​the connecting portion, which makes it easier for the component connected to the connecting section to abut against the end of the middle section, so that the tension or pressure acts directly on the middle section, reducing the external force on the connecting section and increasing the service life of the connecting section.

[0016] Preferably, a quenching layer is connected to the outer periphery of the middle section.

[0017] By adopting the above technical solution, the quenching layer improves the hardness and wear resistance of the outer wall of the middle section, which helps to increase the service life of the middle section.

[0018] Preferably, the cross-section of the connecting section is circular, and an outer circumference of the connecting section is provided with an external thread.

[0019] By adopting the above technical solution, the connection between the connecting section and the required components is achieved, and the threaded connection is suitable for structures that need to withstand axial forces.

[0020] Preferably, one end of the connecting section away from the middle section is provided with a chamfer.

[0021] By adopting the above technical solution, the second chamfer plays a guiding role, making it easier to connect the required parts to the connecting section. The second chamfer helps to disperse the stress concentration at the root of the external thread, thereby improving the strength of the external thread, improving the structural strength of the connecting section, and improving the service life of the connecting section.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The external force on the hydraulic shaft during operation is mainly tension or pressure. At this time, the tensile and compressive stresses on each section of the hydraulic shaft perpendicular to the axis of the hydraulic shaft are inversely proportional to the cross-sectional area. The larger the cross-sectional area of ​​the middle section, the smaller the tensile and compressive stresses. The larger the cross-sectional area of ​​the middle section of the same material, the greater the tension or pressure it can withstand, which helps to improve the structural strength of the middle section, increase the service life of the middle section, and thus increase the service life of the hydraulic shaft as a whole;

[0024] 2. Chamfers are set at both ends of the middle section to help improve the stress distribution at both ends of the middle section, reduce the stress concentration phenomenon at the end surface where the middle section and the connecting section are connected, reduce the structural stress of the end surface of the middle section, improve the structural strength of the hydraulic shaft, and increase the service life of the hydraulic shaft. Chamfers play a guiding role in the installation of the hydraulic shaft, making it easier for the hydraulic shaft to be embedded in the hydraulic cylinder body;

[0025] 3. Induction quenching improves the hardness and wear resistance of the outer wall of the middle section, which helps to increase the service life of the middle section. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the hydraulic shaft of an agricultural deep tiller.

[0027] Figure 2 hour Figure 1 Enlarged view of point A in the middle.

[0028] Figure 3 It is a cross-sectional view of the hydraulic shaft of the agricultural subsoiler.

[0029] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0030] Figure 5 yes Figure 3 Enlarged view of point C in the middle.

[0031] Description of reference numerals:

[0032] 1. Middle section; 11. Chamfer 1; 12. Fillet; 13. Oil inlet channel; 14. Oil outlet channel; 15. Oil outlet; 16. Chamfer 3; 17. Quenching layer;

[0033] 2. Connecting section; 21. External thread; 22. Chamfer 2; 23. Oil inlet; 24. Ring groove. DETAILED DESCRIPTION

[0034] The present application is further described in detail below in conjunction with the accompanying drawings.

[0035] Reference Figure 1The embodiment of the present application discloses a hydraulic shaft of a farming subsoiler, including a middle section 1. The cross section of the middle section 1 is circular. The outer periphery of both ends of the middle section 1 is provided with a chamfer 11. In this embodiment, the cone angle of the chamfer 11 is 24°.

[0036] Reference Figure 1 and Figure 2 , a fillet 12 is provided at the connection between the chamfer 11 and the end faces on both sides of the middle section 1. The fillet 12 is tangent to the end face of the middle section 1. The starting point of the chamfer 11 is located on the outer wall of the middle section 1, and the end point of the chamfer 11 is connected to the fillet 12. The center of the fillet 12 is located on the side of the fillet 12 close to the axis of the middle section 1. In this embodiment, the outer periphery of the middle section 1 is subjected to induction hardening treatment, and the quenching layer 17 is connected to the outer periphery of the middle section 1.

[0037] Reference Figure 1 and Figure 2 A hydraulic shaft of a farming subsoiler also includes a connecting section 2. Two connecting sections 2 are provided, and the cross section of the connecting section 2 is circular. The two connecting sections 2 are coaxially fixedly connected to the two ends of the middle section 1. The cross-sectional area of ​​the middle section 1 is larger than the cross-sectional area of ​​the connecting section 2. The distance between the end of the fillet 12 close to the connecting section 2 and the axis of the middle section 1 is larger than the radius of the connecting section 2.

[0038] Reference Figure 3 and Figure 4 The middle section 1 has an oil inlet passage 13 coaxially disposed at one end thereof. The connecting section 2 near the entrance of the oil inlet passage 13 has an oil inlet port 23, which connects the oil inlet passage 13 with the outside. An annular groove 24 is disposed on the inner wall of the end of the oil inlet port 23 away from the middle section 1.

[0039] The outer periphery of the connecting section 2 is provided with an external thread 21. The outer periphery of one end of the connecting section 2 away from the middle section 1 is provided with a chamfer 22.

[0040] Reference Figure 3 and Figure 5 The middle section 1 is provided with an oil outlet channel 14, the axis of the oil outlet channel 14 is perpendicular to the axis of the oil inlet channel 13, and the oil outlet channel 14 is connected to the oil inlet channel 13. In this embodiment, the cross-sectional area of ​​the oil outlet channel 14 is smaller than the cross-sectional area of ​​the oil inlet channel 13. The distances from the axis of the oil outlet channel 14 to the end surfaces on both sides of the middle section 1 are equal.

[0041] Reference Figure 1 and Figure 5 The outer wall of the middle section 1 is provided with an oil outlet 15, the axis of the oil outlet 15 coincides with the axis of the oil outlet channel 14, and the oil outlet 15 connects the oil outlet channel 14 with the outside. The end of the oil outlet 15 away from the axis of the middle section 1 is provided with a chamfer 16. In this embodiment, the cone angle of the chamfer 16 is 120°.

[0042] The implementation principle of the hydraulic shaft of a farming subsoiler in the embodiment of the present application is as follows: in the actual installation process, the hydraulic shaft is embedded in the hydraulic cylinder body, the connecting section 2 on one side of the middle section 1 is connected to the piston in the hydraulic cylinder body, and the connecting section 2 on the other side of the middle section 1 is connected to the required components. When the hydraulic cylinder is working, the external force and the thrust of the piston act together on the middle section 1. The larger the diameter of the middle section 1, the higher the structural strength of the middle section 1, which helps to improve the overall structural strength of the hydraulic shaft, thereby improving the service life of the hydraulic shaft.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hydraulic shaft of a farming subsoiler, characterized in that: It comprises a middle section (1) and a connecting section (2); one end of the connecting section (2) is coaxially connected to one end of the middle section (1); the connecting section (2) is used for connecting required components; the cross-sectional area of ​​the middle section (1) is larger than the cross-sectional area of ​​the connecting section (2).

2. The hydraulic shaft of the agricultural subsoiler according to claim 1, characterized in that: The cross section of the middle section (1) is circular.

3. The hydraulic shaft of the agricultural subsoiler according to claim 2, characterized in that: The outer periphery of both ends of the middle section (1) is provided with chamfers (11).

4. The hydraulic shaft of the agricultural subsoiler according to claim 3, characterized in that: A rounded corner (12) is provided at the connection between the chamfer 1 (11) and the end surface of the middle section (1).

5. The hydraulic shaft of the agricultural subsoiler according to claim 3, characterized in that: The distance between the end of the chamfer (11) close to the connecting section (2) and the axis of the middle section (1) is greater than the radius of the connecting section (2).

6. The hydraulic shaft of the agricultural subsoiler according to claim 1, characterized in that: A quenching layer (17) is connected to the outer periphery of the middle section (1).

7. The hydraulic shaft of the agricultural subsoiler according to claim 1, characterized in that: The connecting section (2) has a circular cross-section; and an external thread (21) is provided on the outer circumference of the connecting section (2).

8. The hydraulic shaft of the agricultural subsoiler according to claim 7, characterized in that: The outer periphery of one end of the connecting section (2) away from the middle section (1) is provided with a second chamfer (22).

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