CN220416148U - Pearlite gray cast iron for bearing gear - Google Patents

Abstract

The utility model discloses pearlite gray cast iron for a bearing gear, which comprises a gear body, wherein the inner ring of the end face of the gear body is provided with a bearing body, the bearing body is composed of an inner ring and an outer ring, a plurality of balls are arranged between the inner ring and the outer ring, the cross sections of the gear body, the inner ring and the outer ring of the bearing body are respectively provided with a layered structure, the central part of the layered structure is provided with a base layer, the upper part and the lower part of the outer part of the base layer are respectively provided with a pearlite layer, the upper part and the lower part of the outer part of the pearlite layer are respectively provided with a reinforcing layer, and the upper part and the lower part of the outer part of the reinforcing layer are respectively provided with an anti-corrosion layer. The utility model enhances the combination capability of carbon and iron, improves the strength of the utility model structure through the reinforcing ribs, can bear most or even all axial stretching or compression force, and has strong protection effect on the gray cast iron surface due to the form of a layer of anti-corrosion resin which is coated on the outer surface of the reinforcing layer in the layered structure of the gear body and the bearing body.

Description

Pearlite gray cast iron for bearing gears

Technical field

The utility model relates to the technical field related to gray cast iron, specifically a pearlitic gray cast iron for bearing gears.

Background technique

Gray cast iron refers to cast iron with flake graphite. Because the fracture surface appears dark gray when broken, it is called gray cast iron. The main components are iron, carbon, silicon, manganese, sulfur, and phosphorus. It is the most widely used cast iron, and its output accounts for more than 80% of the total cast iron output. Gray cast iron is widely used in current machine tools, machine bases, and gear manufacturing.

However, during use, bearing gear castings made of gray cast iron often deform due to insufficient strength of gray cast iron, which seriously affects the structural strength of gray cast iron castings and reduces their service life.

Utility model content

The purpose of this utility model is to provide a pearlite gray cast iron for bearing gears to solve the problems raised in the above background technology.

In order to achieve the above purpose, the present utility model provides the following technical solution: a pearlitic gray cast iron for bearing gears, including a gear body, the end face inner ring of the gear body is provided with a bearing body, and the bearing body has an inner ring and an outer ring. Composed, a number of balls are arranged in the gap between the inner ring and the outer ring, the structural sections of the inner ring and the outer ring of the gear body and the bearing body are all provided with a layered structure, and the central part of the layered structure is provided with a base body layer, the base layer is provided with pearlite layers on the upper and lower exteriors, the pearlite layer is provided with reinforcing layers on the upper and lower exteriors, and the reinforcing layer is provided with anti-corrosion layers on the upper and lower exteriors.

Preferably, the outer ring of the bearing body and the inner peripheral wall of the gear body are fixedly arranged.

Preferably, the base layer is formed by adding a carbonizer to the molten iron and setting the mold.

Preferably, the pearlite layer is in the form of a layered complex in which ferrite thin layers and cementite thin layers are alternately laminated.

Preferably, the reinforcing layer is provided with reinforcing ribs.

Preferably, the anti-corrosion layer is in the form of a layer of anti-corrosion resin.

Compared with the existing technology, the beneficial effects of this utility model are:

1. The base layer, pearlite layer, and reinforcement layer provided in this utility model enhance the bonding ability of carbon and iron, and through the reinforcement ribs, the strength of the utility structure is improved, and can bear most or even all of the axial tensile or compression force;

2. The utility model also provides an anti-corrosion layer. The anti-corrosion layer is coated on the outer surface of the reinforcement layer in the layered structure of the gear body and the bearing body. Its form is a layer of anti-corrosion resin. The anti-corrosion resin coating layer has strong adhesion. , good ability to adapt to deformation, and has a strong protective effect on the surface of gray cast iron.

Description of the drawings

Figure 1 is an overall front cross-sectional three-dimensional structural view of the utility model;

Figure 2 is an enlarged view of the structure at point A in Figure 1 of the present invention.

In the picture: 1. Gear body; 2. Bearing body; 3. Base layer; 4. Pearlite layer; 5. Reinforcement layer; 6. Anti-corrosion layer.

Detailed ways

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

Please refer to Figures 1-2. The present utility model provides a technical solution: a bearing gear made of pearlite gray cast iron, including a gear body 1. The inner ring of the end face of the gear body 1 is equipped with a bearing body 2. The bearing body 2 has an inner ring and an inner ring. It consists of an outer ring. A number of balls are installed in the gap between the inner ring and the outer ring. The structural sections of the inner ring and the outer ring of the gear body 1 and the bearing body 2 are equipped with a layered structure. The central part of the layered structure is the base layer 3. Pearlite layers 4 are provided on the upper and lower exterior of layer 3. Reinforcement layers 5 are provided on both upper and lower exteriors of pearlite layer 4. The exterior of reinforcing layer 5 is covered with anti-corrosion layers 6 on both upper and lower sides.

The outer ring of the bearing body 2 and the inner peripheral wall of the gear body 1 are welded and fixed; the base layer 3 is made by adding a carbonizer to the molten iron to fix the mold and enhance the binding ability of carbon and iron; the form of the pearlite layer 4 is ferrite It is a layered composite material in which thin layers of cementite and thin layers of cementite are alternately laminated; the reinforcing layer 5 is provided with reinforcing ribs to increase the strength of the gear body 1 and the bearing body 2; the anti-corrosion layer 6 is in the form of a layer of anti-corrosion resin, which is anti-corrosion The resin coating layer has strong adhesion, good adaptability to deformation, and has a strong protective effect on the gray cast iron surface; adding V and Ti to the balls of the bearing body 2 can make the graphite and matrix in the high carbon vanadium titanium gray cast iron structure obtain Significantly refined, and at the same time, it is easy to form hardened phases VC and TiC with extremely high microhardness respectively with carbon, which increases the hardness.

Working principle: When this utility model is used, through the base layer 3, the pearlite layer 4 and the reinforcement layer 5 in the layered structure of the gear body 1 and the bearing body 2, it not only enhances the bonding ability of carbon and iron, but also enhances the bonding ability of carbon and iron through the reinforcement layer 5. The reinforcing ribs improve the strength of the practical structure and can bear most or even all of the axial tensile or compressive force. In addition, the outer surface of the reinforcing layer 5 in the layered structure of the gear body 1 and the bearing body 2 is wrapped The coated anti-corrosion layer 6 is in the form of a layer of anti-corrosion resin. The anti-corrosion resin coating layer has strong adhesion and good adaptability to deformation. It has a strong protective effect on the gray cast iron surface and helps to extend the service life of the utility model. It has It has the advantages of simple structure, convenient use and good use effect.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations are mutually exclusive. any such actual relationship or sequence exists between them. Furthermore, the terms "comprises," "comprises," or any other variations thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment.

Claims (6)

1. A pearlite gray cast iron for bearing gears, including a gear body (1), characterized in that: the inner ring of the end face of the gear body (1) is provided with a bearing body (2), and the bearing body (2) has It consists of an inner ring and an outer ring. A number of balls are placed in the gap between the inner ring and the outer ring. The structural sections of the inner ring and the outer ring of the gear body (1) and the bearing body (2) are provided with a layered structure. The central part of the layered structure is provided with a base layer (3), the base layer (3) is provided with pearlite layers (4) on the upper and lower sides, and the outer upper and lower sides of the pearlite layer (4) are provided with Reinforcement layer (5), an anti-corrosion layer (6) is provided on the upper and lower sides of the reinforcement layer (5). 2. Pearlite gray cast iron for bearing gears according to claim 1, characterized in that: the outer ring of the bearing body (2) and the inner peripheral wall of the gear body (1) are fixedly arranged. 3. A pearlite gray cast iron for bearing gears according to claim 1, characterized in that: the base layer (3) is made by adding a carbonizer to the molten iron to fix the mold. 4. A pearlite gray cast iron for bearing gears according to claim 1, characterized in that: the form of the pearlite layer (4) is a layer of alternately laminated ferrite thin layers and cementite thin layers. A complex object. 5. A pearlite gray cast iron for bearing gears according to claim 1, characterized in that: the reinforcing layer (5) is provided with reinforcing ribs. 6. A pearlite gray cast iron for bearing gears according to claim 1, characterized in that: the anti-corrosion layer (6) is in the form of a layer of anti-corrosion resin.