Gear and gear shaft assembling structure for automobile speed reducing mechanism

Abstract

The gear and gear shaft assembling structure for the automobile speed reducing mechanism comprises a gear and a gear shaft, the gear shaft is provided with an umbrella-shaped part, the umbrella-shaped part is assembled with the end face of the gear, and the surface of the umbrella-shaped part is matched with the surface of the end face of the gear to form a smooth transition curved surface. First oil guide grooves are annularly distributed in the curved surface, one ends of the first oil guide grooves are located on the gear shaft, and the other ends of the first oil guide grooves are connected to the tooth grooves. Through the arrangement of the first oil guide groove, when the gear runs at a low speed, the lubricating oil is transmitted from the gear shaft to the tooth groove of the gear through the first oil guide groove by utilizing centrifugal force, the good lubricating state of the meshing part is guaranteed, and the service life is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of gear assembly structures, and in particular relates to a gear shaft assembly structure used for a reduction mechanism of an automobile. Background Art

[0002] In mechanical equipment such as automobiles, the reduction mechanism is one of the key components for achieving power transmission and speed regulation. Among them, the gear transmission system, as the core part of the reduction mechanism, plays a vital role in ensuring efficient and stable operation. Traditional reduction mechanisms usually adopt cylindrical gear design, which is lubricated by directly immersing the gears in a lubricating oil pool or oil bath. When the gears rotate at high speed, the centrifugal force generated by their rotation can be effectively used to throw the lubricating oil to other gear surfaces that are not fully immersed in the oil, thereby realizing the self-lubricating process of the entire gear system. This method has a significant effect on maintaining good contact between gears, reducing wear and extending service life.

[0003] However, in actual application, it is found that when the vehicle is driving at a low speed or idling, due to the lack of sufficient centrifugal force, it is difficult for the lubricating oil to be effectively dispersed to various locations that need lubrication, especially the gear parts far away from the center of the oil pool. This leads to dry friction between the gear meshing surfaces, which not only increases energy loss, but also accelerates the wear of the gear material. In severe cases, it may even cause gear failure, greatly shortening the service life of the entire transmission system. In addition, insufficient lubrication in this case will also cause problems such as increased noise and vibration, affecting driving experience and safety. Summary of the invention

[0004] In view of the deficiencies in the above-mentioned prior art, the present invention provides a gear shaft assembly structure for an automobile reduction mechanism. Through a specially designed oil guide groove structure, the lubricating oil can be effectively promoted to flow from the gear shaft to the gear tooth groove even at low speeds, thereby maintaining a good lubrication state of the entire gear set, thereby achieving the purpose of improving work efficiency and extending service life.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions.

[0006] A gear shaft assembly structure for an automobile reduction mechanism includes a gear and a gear shaft, wherein the gear shaft is provided with an umbrella-shaped portion, the umbrella-shaped portion is assembled with the end face of the gear, and the surface of the umbrella-shaped portion cooperates with the surface of the end face of the gear to form a smoothly transitioned curved surface. A first oil guide groove is distributed in an annular manner on the curved surface, one end of the first oil guide groove is located on the gear shaft, and the other end is connected to the tooth groove. The first oil guide groove is provided in the present application, and when the gear is running at a low speed, the centrifugal force is used to transfer the lubricating oil from the gear shaft to the tooth groove of the gear through the first oil guide groove, thereby ensuring a good lubrication state of the meshing part and extending the service life.

[0007] As a preferred technical solution for a gear shaft assembly structure for an automobile reduction mechanism, the gear shaft includes two sets of split shafts, which are respectively assembled on both sides of the gear and connected by fasteners. Such a structure makes installation more flexible and convenient, and is also convenient for later maintenance or replacement of parts. In addition, the two parts of the shaft can be aligned and adjusted more accurately, which is conducive to improving the working efficiency of the entire reduction mechanism.

[0008] As a preferred technical solution for the gear shaft assembly structure of an automobile reduction mechanism, the facing end faces of the two groups of split shafts are snap-fitted and assembled, and this design can enhance the overall structural strength of the gear shaft.

[0009] As a preferred technical solution for the gear and gear shaft assembly structure of the automobile reduction mechanism, a limit block is provided on the end face of the gear, and a limit groove is provided on the umbrella-shaped part to cooperate with the limit block. This design ensures the fixed connection strength of the gear and the gear shaft, and avoids the problems such as key breakage that are easy to occur in traditional keyway connection.

[0010] As a preferred technical solution for the gear shaft assembly structure of the automobile reduction mechanism, the first oil guide groove is connected to the tooth groove at one end with a flared design. Such a structure helps to better guide the lubricating oil into the tooth groove area, ensuring that sufficient lubrication effect can be obtained even at a low speed, avoiding damage caused by dry friction.

[0011] As a preferred technical solution for the gear shaft assembly structure of the automobile reduction mechanism, a second oil guide groove is provided in the tooth groove, and the second oil guide groove is connected to the first oil guide groove. This design enables the first oil guide groove and the second oil guide groove to form a continuous lubrication path, allowing the lubricating oil to flow smoothly during the entire working process, and prolonging the residence time of the lubricating oil in the tooth groove to ensure lubrication performance.

[0012] Compared with the prior art, the present application has the following beneficial effects: sufficient lubrication of the gear structure can be achieved under low speed conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of the gear shaft assembly structure.

[0014] Figure 2 This is the structural exploded diagram of the gear shaft assembly structure.

[0015] Figure 3 It is a side view of the gear shaft assembly structure.

[0016] Figure 4 This is the front view of the gear shaft assembly structure.

[0017] Figure 5 for Figure 4 A partial enlarged view of point A in the middle.

[0018] The following is a description of the markings in the accompanying drawings of the specification:

[0019] 10. gear; 11. tooth groove; 12. second oil guide groove; 13. limit block;

[0020] 20. Gear shaft; 21. Umbrella-shaped portion; 22. First oil guide groove; 23. Split shaft; 24. Limiting groove. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] In the following embodiments, the same or similar reference numerals throughout represent the same or similar components or components with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the terms: center, longitudinal, transverse, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and therefore cannot be understood as limiting the present invention. In addition, the terms: first, second, etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features shown. In the description of the present invention, unless otherwise clearly specified and limited, the terms: install, connect, connect, etc. should be understood in a broad sense, and ordinary technicians in this field can understand the specific meaning of the above terms in this practicality according to the specific circumstances.

[0024] Reference Figures 1 to 4 A gear shaft assembly structure for a reduction mechanism of an automobile includes a gear 10 and a gear shaft 20. The gear shaft 20 is provided with an umbrella-shaped portion 21. The umbrella-shaped portion 21 is assembled with the end face of the gear 10. The surface of the umbrella-shaped portion 21 cooperates with the surface of the end face of the gear 10 to form a smoothly transitioned curved surface. A first oil guide groove 22 is distributed in an annular manner on the curved surface. One end of the first oil guide groove 22 is located on the gear shaft 20, and the other end is connected to the tooth groove 11. The present application uses the first oil guide groove 22 to transfer the lubricating oil from the gear shaft 20 to the tooth groove 11 of the gear 10 through the first oil guide groove 22 when the gear 10 runs at a low speed, thereby ensuring a good lubrication state of the meshing part and extending the service life.

[0025] In the present application, the gear shaft 20 includes two groups of split shafts 23, which are respectively assembled on both sides of the gear 10, and the two groups of split shafts 23 are connected by fasteners. Such a structure makes the installation more flexible and convenient, and is also convenient for later maintenance or replacement of parts. In addition, more precise alignment and adjustment can be achieved between the two parts of the shaft, which is conducive to improving the working efficiency of the entire reduction mechanism. The two groups of split shafts 23 are assembled with their facing end faces, and this design can strengthen the overall structural strength of the gear shaft 20.

[0026] In order to ensure the matching accuracy and assembly connection strength of the gear 10 and the gear shaft 20, a limit block 13 is provided on the end face of the gear 10, and a limit groove 24 is provided on the umbrella-shaped portion 21 to match the limit block 13. This design ensures the fixed connection strength of the gear 10 and the gear shaft 20, and avoids the problem of key breakage that is easy to occur in traditional keyway connection.

[0027] In addition, the first oil guide groove 22 is connected to the tooth groove 11 at one end thereof with a flared design. Such a structure helps to better guide the lubricating oil into the tooth groove 11 area, ensuring that sufficient lubrication effect can be obtained even at a low speed, and avoiding damage caused by dry friction. The tooth groove 11 is provided with a second oil guide groove 12, and the second oil guide groove 12 is connected to the first oil guide groove 22. This design enables the first oil guide groove 22 and the second oil guide groove 12 to form a continuous lubrication path, allowing the lubricating oil to flow smoothly throughout the entire working process, and prolonging the residence time of the lubricating oil in the tooth groove 11, thereby ensuring lubrication performance.

[0028] In order to ensure the lubrication effect and corrosion resistance of the oil guide groove during long-term use, the present application performs nitriding treatment on the surface of the oil guide groove to form a high-hardness nitride layer on the surface of the oil guide groove, which significantly improves the surface hardness and wear resistance, enhances the corrosion resistance, and improves the fluidity and lubrication effect of the lubricating oil.

[0029] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. A gear shaft assembly structure for a vehicle reduction mechanism, characterized in that: The invention comprises a gear (10) and a gear shaft (20), wherein the gear shaft (20) is provided with an umbrella-shaped portion (21), the umbrella-shaped portion (21) is assembled with the end face of the gear (10), and the surface of the umbrella-shaped portion (21) cooperates with the surface of the end face of the gear (10) to form a smoothly transitioned curved surface; a first oil guide groove (22) is annularly distributed on the curved surface, one end of the first oil guide groove (22) is located on the gear shaft (20), and the other end is connected to the tooth groove (11).

2. The gear shaft assembly structure for a vehicle reduction mechanism according to claim 1, characterized in that: The gear shaft (20) comprises two groups of split shafts (23), the two groups of split shafts (23) are respectively assembled on both sides of the gear (10), and the two groups of split shafts (23) are connected via fasteners.

3. The gear shaft assembly structure for a vehicle reduction mechanism according to claim 2, characterized in that: The facing end faces of the two sets of split shafts (23) are assembled by snap-fitting.

4. The gear shaft assembly structure for a vehicle reduction mechanism according to claim 1, characterized in that: A limiting block (13) is provided on the end surface of the gear (10), and a limiting groove (24) cooperating with the limiting block (13) is provided on the umbrella-shaped portion (21).

5. The gear shaft assembly structure for a vehicle reduction mechanism according to claim 1, characterized in that: One end of the first oil guide groove (22) connected to the tooth groove (11) is designed to be expanded.

6. The gear shaft assembly structure for a vehicle reduction mechanism according to claim 1, characterized in that: A second oil guide groove (12) is provided in the tooth groove (11), and the second oil guide groove (12) is connected to the first oil guide groove (22).

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