Integrated structure of external spline chamfer, oil sealing shaft diameter and shaft hobbing

Abstract

The utility model discloses an integrated structure of an external spline chamfer, an oil sealing shaft diameter and a hobbing on a shaft in the technical field of gears, which comprises a gear shaft, a bevel gear is arranged at one end of the gear shaft, the structure is reasonable, the tooth crest part of the bevel gear on the gear shaft is processed by the external spline chamfer, so that the purposes of eliminating sharp corners and improving the service life of the bevel gear are achieved. According to the bevel gear, the oil seal shaft is integrally formed at one end of the gear shaft, the oil seal grooves are formed between the oil seal shaft and the gear shaft, the oil seal grooves are formed between the oil seal shaft and the gear shaft, and the oil seal grooves are formed in the contact area of the oil seal grooves, so that the oil seal effect is improved, and the service life of the bevel gear is prolonged. Precision machining is needed, the situation that abrasion is accelerated due to the fact that the contact face is too thick or the contact face is too smooth to be not beneficial to formation of an oil film is avoided as much as possible, the oil seal groove obtained after precision machining has a large gap and is more suitable for the requirements for high speed, high temperature or lubrication, and the attaching degree of the oil seal is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of gear technology, specifically an integrated structure of external spline chamfer, oil sealing shaft diameter, and gear hobbing on the shaft. Background Technology

[0002] There is a close relationship between the external spline chamfer, the oil seal shaft diameter, and the hobbing on the shaft. This is mainly reflected in the overall design and functional realization of mechanical transmission and component processing. Currently, in gear tooth profile processing, chamfering is usually not applied to the tooth tip. This can easily lead to friction or impact under the protruding sharp corner area of ​​the gear tooth tip, causing noise and damage to the meshing tooth surface. At the same time, the oil seal on the gear shaft is particularly important. Without an oil seal, it is easy to cause damage and reduce flexibility later. The processing condition of the oil seal directly affects the stability after lubrication. The connection between the gear and the shaft directly affects the efficiency and lifespan of the differential. Failure to integrate and cooperate properly directly reduces the overall stability and durability.

[0003] Therefore, it is necessary to develop an integrated structure for external spline chamfering, oil sealing shaft diameter, and gear hobbing on the shaft. Utility Model Content

[0004] The purpose of this invention is to provide an integrated structure for external spline chamfering, oil sealing shaft diameter, and gear hobbing on the shaft, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an integrated structure of external spline chamfer, sealing shaft diameter and gear hobbing on shaft, including a gear shaft, one end of which is equipped with a bevel gear;

[0006] The outer wall of the bevel gear is provided with an external spline chamfer, and an oil seal shaft is installed at one end of the gear shaft.

[0007] Preferably, one end of the oil seal shaft is fixedly connected to the other end of the gear shaft, and the oil seal shaft and the gear shaft are integrally formed.

[0008] Preferably, an oil seal groove is provided between the oil seal shaft and the gear shaft, and an installation hole is provided at the center of the other end of the oil seal shaft.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] By performing external spline chamfering on the tip of the bevel gear teeth on the gear shaft, sharp corners are eliminated, preventing noise and damage to the meshing tooth surfaces caused by small bumps, thus improving the stability of the bevel gear during meshing and reducing vibration.

[0011] By integrally molding the oil seal shaft onto one end of the gear shaft and setting an oil seal groove between them, precision machining is required depending on the contact area of ​​the oil seal groove. This avoids situations where an excessively rough contact surface will accelerate wear or an excessively smooth surface will hinder the formation of an oil film. The precision-machined oil seal groove has a larger gap, which is more suitable for high-speed, high-temperature, or lubrication requirements, ensuring the fit of the oil seal.

[0012] By integrally molding the gear shaft and the bevel gear, the weak connection areas of the split structure are avoided as much as possible, the fatigue life is improved, and the overall stability and durability are also effectively improved. Attached Figure Description

[0013] Figure 1 A schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic cross-sectional view of the C-section structure provided by this utility model.

[0015] In the diagram: 1. Gear shaft; 2. Bevel gear; 3. External spline chamfer; 4. Oil seal shaft; 5. Oil seal groove; 6. Mounting hole. Detailed Implementation

[0016] 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.

[0017] This utility model provides the following technical solution: an integrated structure of external spline chamfer, oil-sealing shaft diameter, and gear hobbing on the shaft. Please refer to [link / reference needed]. Figures 1-2 The system includes a gear shaft 1, with a bevel gear 2 mounted on one end of the gear shaft 1. The outer wall of the bevel gear 2 is provided with an external spline chamfer 3. The bevel gear 2 on the gear shaft 1 is machined with an external spline chamfer 3 to eliminate sharp corners, prevent noise and damage to the meshing tooth surface caused by small bumps, improve the stability of the bevel gear during meshing, and thus reduce the generation of vibration.

[0018] An oil seal shaft 4 is installed at one end of the gear shaft 1. One end of the oil seal shaft 4 is fixedly connected to the other end of the gear shaft 1, and the oil seal shaft 4 and the gear shaft 1 are integrally formed. An oil seal groove 5 is provided between the oil seal shaft 4 and the gear shaft 1. An installation hole 6 is provided at the center of the other end of the oil seal shaft 4. The oil seal shaft 4 is integrally formed on one end of the gear shaft 1, and an oil seal groove 5 is provided between them. According to the contact area of ​​the oil seal groove 5, precision machining is required to avoid the situation where the contact surface is too rough, which will accelerate wear, or too smooth, which will not be conducive to the formation of oil film. The precision-machined oil seal groove has a larger gap, which is more suitable for high speed, high temperature or lubrication requirements, and ensures the fit of the oil seal.

[0019] Working Principle: When using this invention, the bevel gear 2 on the gear shaft 1 undergoes external spline chamfering 3 at the tooth tip to eliminate sharp corners and prevent noise and damage to the meshing tooth surface caused by small bumps. This improves the stability of the bevel gear during meshing, thereby reducing vibration. During processing, the tooth profile chamfering is a process of chamfering the sharp corners of the entire exposed tooth profile of the gear, which can reduce stress concentration during heat treatment, prevent quenching cracks or fissures, avoid the generation of fatigue micro-crack sources, and improve gear reliability. The oil seal shaft 4 is integrally formed on one end of the gear shaft 1, and an oil seal groove 5 is set between them. The contact area of ​​the oil seal groove 5 requires precision machining to avoid situations where an excessively rough contact surface will accelerate wear or an excessively smooth surface will hinder oil film formation. The precision-machined oil seal groove has a larger gap, which is more suitable for high-speed, high-temperature, or lubrication requirements, ensuring the fit of the oil seal. Precision machining can be achieved using a twisted pattern. The shaft diameter is matched with the inner diameter of the oil seal using an optical measuring instrument. It is made of 17CrNiMo6 material, which is infiltrated, quenched and tempered, with a carburized layer depth of 0.5-0.8mm and a surface hardness of 650-750HV30. There are no twisted lines, and the average deviation of the arithmetic roughness of the profile is ≤0.8. The vertical distance between the highest peak and the lowest valley of the surface does not exceed 4μm, and the roughness is more reasonable. It will not leak or aggravate wear. By taking the gear shaft 1 and the bevel gear 2 as an integral molding process, it is a functional carrier that integrates high strength, high precision and lightweight. The gear tooth surface formed by hobbing meshes precisely with the matched planetary gears to transmit the engine torque to the wheels and realize the differential function. By optimizing the stress of the tooth surface contact stepwise, the torque difference between the left and right wheels is balanced. The process precision is higher and the tooth pitch error is smaller. It can reduce the noise caused by vibration during meshing, avoid the occurrence of weak connection areas in the split structure as much as possible, and improve the fatigue life. It also effectively improves the overall stability and durability.

[0020] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An integral structure comprising an external spline chamfer, a sealing shaft diameter, and gear hobbing on the shaft, including a gear shaft (1), characterized in that: A bevel gear (2) is mounted on one end of the gear shaft (1); The outer wall of the bevel gear (2) is provided with an external spline chamfer (3), and an oil seal shaft (4) is installed at one end of the gear shaft (1).

2. The integrated structure of external spline chamfer, sealing shaft diameter, and gear hobbing on the shaft according to claim 1, characterized in that: One end of the oil seal shaft (4) is fixedly connected to the other end of the gear shaft (1), and the oil seal shaft (4) and the gear shaft (1) are integrally formed.

3. The integrated structure of external spline chamfer, oil-sealing shaft diameter, and gear hobbing on the shaft according to claim 1, characterized in that: An oil seal groove (5) is provided between the oil seal shaft (4) and the gear shaft (1), and an installation hole (6) is provided at the center of the other end of the oil seal shaft (4).

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