CN111623108A - High-rotation-speed oil seal of new energy gearbox - Google Patents

Abstract

The invention discloses a high-speed oil seal for a new energy gearbox, which comprises an outer diameter, a main lip is fixedly arranged on one side of the outer diameter, a metal skeleton is sleeved on the outside of the main lip, and the metal skeleton is embedded in the inside of the outer diameter. One side of the lip is provided with a molding surface, one side of the molding surface is provided with a two-way oil return line, the surface of the molding surface is sprayed with PTFE coating, the outer wall of the main lip is provided with a spring groove, and the inner wall of the spring groove is fixed with a spring, the spring One side is provided with a leaf tail, the leaf tail is fixed on the main lip, one side of the outer wall of the outer diameter is provided with a front chamfer, the other side of the outer wall of the outer diameter is provided with a rear chamfer, and the other side of the outer diameter is fixed with a There are facial teeth. The invention reduces the friction between the lip and the shaft by spraying the PTFE coating on the molding surface, improves the seal, and cooperates with the design of the main lip to prolong the service life of high speed. In addition, the bidirectional oil return line meets the needs of bidirectional operation and ensures the high speed state of the gearbox. Keep it in a sealed state to avoid oil leakage.

Description

A new energy gearbox high speed oil seal

technical field

The invention relates to the field of oil seals, in particular to a high-speed oil seal of a new energy gearbox.

Background technique

The oil seal is the seal of the lubricating oil. It is a mechanical element used to seal the grease. It isolates the parts that need to be lubricated in the transmission parts from the output parts, so as not to leak the lubricating oil. The seals used for static seals and dynamic seals are called oil seals. In the application of rotary oil seals, oil seals are required for all the parts that have liquid lubricating oil in the running body box and are connected to the outside. However, the existing products on the market have problems of large wear and tear, aging and cracking. Some of the high speeds in new energy vehicles can currently reach 20,000rpm. It is necessary to pay more attention to the technical problem of gearbox wear resistance. At present, there is a lack of related products on the market. Therefore, providing a better and more wear-resistant oil seal is an urgent problem to be solved in the field of new energy vehicles.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a high-speed oil seal for a new energy gearbox to solve the above-mentioned problems in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: a high-speed oil seal for a new energy gearbox, comprising an outer diameter, one side of the outer diameter is fixedly provided with a main lip, and the outer part of the main lip is sleeved with a metal skeleton , the metal skeleton is embedded in the inside of the outer diameter, one side of the main lip is provided with a molding surface, one side of the molding surface is provided with a bidirectional oil return line, and the surface of the molding surface is sprayed with a PTFE coating The outer wall of the main lip is provided with a spring groove, the inner wall of the spring groove is fixed with a spring, one side of the spring is provided with a leaf tail, and the leaf tail is fixed on the main lip.

Preferably, a front chamfer is formed on one side of the outer wall of the outer diameter, and a rear chamfer is formed on the other side of the outer wall of the outer diameter.

Preferably, the other side of the outer diameter is fixedly provided with a face indentation, and the inner side of the outer diameter is fixedly provided with an inner indentation opposite to the position of the face incision.

Preferably, the surface of the outer diameter is fixedly provided with a dust lip opposite to the main lip.

Preferably, the material of the outer diameter and the main lip are both fluororubber.

Preferably, the material of the metal skeleton is carbon steel.

Technical effects and advantages of the present invention:

By spraying the PTFE coating on the molding surface, the friction between the lip and the shaft is reduced, and the sealing is improved. With the design of the main lip, the problems of high wear and aging cracks of the traditional design at high speed are avoided. In addition, the bidirectional oil return line meets the needs of bidirectional operation. , to ensure that the gearbox maintains a sealed state at high speed to avoid oil leakage, use the face engraving and internal engraving to locate during molding, and increase the sealing of the outer diameter and the assembly hole through the rubber coating design to avoid oil leakage. occurs, affecting the normal operation of the gearbox.

Description of drawings

FIG. 1 is a schematic view of the front structure of the present invention.

In the picture: 1. Front chamfer; 2. Metal frame; 3. Outer diameter; 4. Back chamfer; 5. Face engraving; 6. Dust lip; 7. Forming surface; 8. Oil return line; 9. Main lip; 10. Spring groove; 11. Leaf tail; 12. Spring; 13. Internal teeth.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The present invention provides a high-speed oil seal for a new energy gearbox as shown in FIG. 1, comprising an outer diameter 3, a main lip 9 is fixed on one side of the outer diameter 3, and a metal skeleton 2 is sleeved on the outside of the main lip 9, The metal frame 2 is embedded in the inside of the outer diameter 3, one side of the main lip 9 is provided with a molding surface 7, one side of the molding surface 7 is provided with a two-way oil return line 8, the surface of the molding surface 7 is sprayed with PTFE coating, PTFE The coating is polytetrafluoroethylene, which has the characteristics of acid resistance, alkali resistance and resistance to various organic solvents. It is almost insoluble in all solvents and has the characteristics of high temperature resistance. Its friction coefficient is extremely low. The outer wall of the main lip 9 is provided with a spring. Groove 10, the inner wall of the spring groove 10 is fixed with a spring 12, one side of the spring 12 is provided with a leaf tail 11, the leaf tail 11 is fixed on the main lip 9, the leaf tail 11 is used to prevent the spring 12 from falling off, the outer wall of the outer diameter 3 One side is provided with a front chamfer 1, and the other side of the outer wall of the outer diameter 3 is provided with a rear chamfer 4. The front chamfer 1 is used to guide it for installation, and the rear chamfer 4 releases the rubber extrusion force during installation. The other side of 3 is fixedly provided with face engraving teeth 5, and the inner side of the outer diameter 3 is fixedly provided with internal engraving teeth 13 opposite to the position of the facial engraving teeth 5. The facial engraving teeth 5 and the internal engraving teeth 13 are used for positioning during molding, and the outer The surface of the diameter 1 is fixed with a dust lip 6 opposite to the main lip 9. The dust lip 6 is used to prevent external dust from entering, and the sealing performance between the outer diameter 3 and the assembly hole is increased by the design of the overmolding, and the spring 12 provides a certain radial The two-way oil return line 8 meets the needs of two-way operation, increases the sealing performance of the lip, ensures the two-way rotary seal, improves the sealing effect of the oil seal from the outside to the inside, and ensures that the gearbox remains sealed at high speeds.

The outer diameter 3 and the main lip 9 are made of fluororubber, which is resistant to aging, heat and oil. It is suitable for almost all lubricating oils, fuel oils and gasoline. It is not easy to harden in oils containing extreme pressure additives, and the permanent compression deformation is relatively low. Small, the metal frame 2 is made of carbon steel, which has high hardness and high strength.

The working principle of the present invention:

When the oil seal is installed and used, first use the front chamfer 1 to guide it for installation, and the rear chamfer 4 to release the rubber extrusion force during installation, and use the face engraved teeth 5 and the internal engraved teeth 13 to position it during forming, so that the main lip 9 To seal oil to prevent leakage, spray PTFE coating on the molding surface 7 to reduce the friction between the lip and the shaft, improve the seal, and cooperate with the design of the main lip 9 to prolong the service life of high speed, and the bidirectional oil return line 8 meets the needs of bidirectional operation. Increase the sealing performance of the lip to ensure two-way rotary sealing. After the oil seal is installed, the spring 12 is used to provide a certain radial force to increase the sealing performance and improve the sealing effect of the oil seal.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection or a It can be a detachable connection or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The standard parts used in the present invention can be purchased from the market, and the special-shaped parts can be customized according to the description in the description and the drawings.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. The utility model provides a high rotational speed oil blanket of new forms of energy gearbox, includes external diameter (3), its characterized in that, one side of external diameter (3) is fixed and is equipped with main lip (9), the outside cover of main lip (9) is equipped with metal framework (2), metal framework (2) inlay the inside of locating external diameter (3), one side of main lip (9) is equipped with profiled surface (7), one side of profiled surface (7) is equipped with two-way oil return line (8), the surface spraying of profiled surface (7) has the PTFE coating, spring ditch (10) have been seted up to the outer wall of main lip (9), the inner wall of spring ditch (10) is fixed and is equipped with spring (12), one side of spring (12) is equipped with leaf tail (11), leaf tail (11) are fixed to be located on main lip (9).

2. The high-rotation-speed oil seal of the new energy gearbox according to claim 1, wherein a front chamfer (1) is formed in one side of the outer wall of the outer diameter (3), and a rear chamfer (4) is formed in the other side of the outer wall of the outer diameter (3).

3. The high-rotation-speed oil seal of the new energy gearbox as claimed in claim 1, wherein a face notch (5) is fixedly arranged on the other side of the outer diameter (3), and an inner notch (13) opposite to the face notch (5) is fixedly arranged on the inner side of the outer diameter (3).

4. The high-speed oil seal of the new energy gearbox is characterized in that a dust-proof lip (6) opposite to the main lip (9) is fixedly arranged on the surface of the outer diameter (1).

5. The high-speed oil seal of the new energy gearbox according to claim 1, wherein the outer diameter (3) and the main lip (9) are both made of fluororubber.

6. The high-rotation-speed oil seal of the new energy gearbox according to claim 1, wherein the metal framework (2) is made of carbon steel.

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