CN102102710A - Rolling bearing retainer with micro pits - Google Patents

Abstract

The invention discloses a rolling bearing cage with dimples. The contact surface between the rolling bearing cage and the rolling elements is provided with micro pits that can store lubricating oil or grease. The shape of the micropit is circular, the ratio of the total area of the circular micropit to the contact surface area of the rolling element is 10%~20%, the ratio of the depth to diameter of the micropit is 0.05~0.2, and each micropit is evenly arranged on the contact surface of the rolling element . The rolling bearing cage with micropits of the present invention can store lubricating oil or grease, provide sufficient lubricant for the rolling bearing, and improve the lubrication performance of the rolling bearing. The lubricant contained in the cage itself is helpful for its own lubrication and protection, and comprehensively improves the bearing service life.

Description

Rolling bearing cage with dimples

technical field

The invention relates to a rolling bearing cage, in particular to a rolling bearing cage with dimples.

Background technique

The rolling bearing cage completely or partially wraps the rolling elements, and its function is to evenly space the rolling elements and guide the rolling elements to keep moving on the raceway. All kinds of rolling bearings, such as deep groove ball bearings, cylindrical roller bearings, tapered roller bearings and other rolling bearing cages, only evenly separate the rolling elements and guide the rolling elements to move on the raceway, which does not help the lubrication performance of the bearing. In addition, when the rolling bearing is working, the high temperature, severe friction and wear caused by friction may burn or break the cage, so the lubrication of the cage is also very important. Especially in tapered roller bearings, the bearings must bear compound loads (radial and axial), and the load must be carried between the end faces of the tapered rollers and the cage. The working environment here is harsh, and there must be enough lubricating oil. Here If the cage can store lubricant, the lubrication performance of the bearing will be greatly improved.

Based on the above background, if the cage can store lubricant, such as storing grease and providing it to the bearing during operation, it will undoubtedly be of great help to the lubrication performance of the bearing and improve its lubrication performance. At the same time, in the environment of high temperature and severe friction, the cage itself contains lubricant, which is helpful for its own lubrication and prevents the failure of bearing lubrication.

Contents of the invention

The purpose of the present invention is to provide a rolling bearing cage with dimples, which can store lubricant, increase the function of the cage to store lubricant, obtain better lubricating performance of the bearing, and increase the service life of the bearing.

The technical scheme adopted in the present invention is:

The contact surface between the rolling bearing cage and the rolling body of the present invention is provided with micro pits capable of storing lubricating oil or lubricating grease.

The shape of the micropit is circular, the ratio of the total area of the circular micropit to the contact surface area of the rolling element is 10%~20%, the ratio of the depth to diameter of the micropit is 0.05~0.2, and each micropit is evenly arranged on the contact surface of the rolling element .

The rolling bearing cage is a tapered roller bearing cage, and the contact surface of the tapered roller bearing cage and the tapered rolling element is provided with micropits capable of storing lubricating oil or grease.

The rolling bearing cage is a cylindrical roller bearing cage, and the contact surface of the cylindrical roller bearing cage and the cylindrical rolling body is provided with micro pits capable of storing lubricating oil or grease.

The rolling bearing cage is a ball bearing cage, and the contact surface of the ball bearing cage and the ball rolling body is provided with micro pits capable of storing lubricating oil or grease.

The beneficial effects that the present invention has are:

1. The small pit of the rolling bearing cage can store lubricant. When the rolling bearing is working, the rolling element rolls out the lubricant, providing sufficient lubricant for the bearing and improving the lubrication performance of the bearing;

2. The small pits of the rolling bearing cage contain lubricant, which can fully lubricate the cage and prevent the cage from being burned and broken in harsh working environments;

3. Grease is filled in the small pits of the rolling bearing cage, which is very suitable for bearings with one-time lifetime lubrication, and can provide sufficient lubricant for this type of bearings;

4. In tapered roller bearings, the bearing has to bear radial and axial forces. Under the combined load, one end surface of the tapered roller and the cage will be squeezed. The working conditions here are harsh, and the cage is installed here. There are micro pits to store lubricants to improve its lubricating performance.

Description of drawings

Figure 1 is a schematic diagram of a tapered roller bearing cage;

Figure 2 is a schematic diagram of a cylindrical roller bearing cage;

Fig. 3 is a schematic diagram of a ball bearing cage;

Figure 4 is an enlarged schematic diagram of the micropit arrangement on the upper surface of the cage;

Fig. 5 is a sectional view of the micropit A-A in Fig. 4 .

In the figure: 1. Tapered roller bearing cage; 2. The small end face of the cage in contact with the tapered rollers; 3. The tapered surface of the cage in contact with the tapered rollers; 4. The large end face of the cage in contact with the tapered rollers ; 5. Cylindrical roller bearing cage; 6. The cylindrical surface of the cage in contact with the cylindrical roller; 7. The ball bearing cage; 8. The spherical surface of the cage in contact with the rolling ball.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

The contact surface between the rolling bearing cage and the rolling elements is provided with micro pits that can store lubricating oil or grease.

As shown in Figure 1, the rolling bearing cage is a tapered roller bearing cage 1, the small end surface 2 of the tapered roller bearing cage in contact with the tapered rollers, the tapered surface 3 of the cage in contact with the tapered rollers and the cage The surface of the large end face 4 in contact with the tapered rollers is provided with dimples that can store lubricating oil or grease.

As shown in Figure 2, the rolling bearing cage is a cylindrical roller bearing cage 5, and the cylindrical surface 6 of the cage in contact with the cylindrical rollers is provided with micropits capable of storing lubricating oil or grease.

As shown in FIG. 3 , the rolling bearing cage is a ball bearing cage 7 , and the spherical surface 8 of the cage in contact with the rolling balls is provided with micropits capable of storing lubricating oil or grease.

As shown in Figure 4, it is an enlarged view of the micropit arrangement on each surface. The micropit is circular. The drawing method is formed. The area ratio of the micropit, also known as the area density, is 10%~20%. The area ratio refers to the ratio of the total area of the circular micropit to the contact surface area of the rolling element; as shown in Figure 4, the depth-to-diameter ratio of the micropit is 0.05 ~0.2, the depth-to-diameter ratio refers to the value of h/d in Figure 5, where h is the depth of the micropit, d is the diameter of the micropit, and the value of d ranges from 100 microns to 200 microns. Each micropit is evenly arranged on the contact surface of the rolling element, and the distance between adjacent circular pits on the 20°±5° slope in Figure 4 is determined by the area ratio and d value.

Finally, what needs to be added is that the load of the rolling bearing is mainly carried by the rolling elements, so having dimples on the cage will not affect the load-bearing characteristics of the rolling bearing.

The above specific embodiments are used to explain the present invention, rather than to limit the present invention. Within the spirit of the present invention and the protection scope of the claims, any modification and change made to the present invention will fall into the protection scope of the present invention.

Claims (5)

1. rolling bearing retainer with little hole, it is characterized in that: rolling bearing retainer and rolling element contact surface are provided with little hole that can store lubricant oil or lubricating grease.

2. a kind of rolling bearing retainer according to claim 1 with little hole, it is characterized in that: described little hole be shaped as circle, circular little hole gross area is 10% ~ 20% with rolling element contact surface area ratio, little hole aspect ratio is 0.05 ~ 0.2, and each little hole is evenly arranged in the rolling element contact surface.

3. a kind of rolling bearing retainer according to claim 1 and 2 with little hole, it is characterized in that: described rolling bearing retainer is the tapered roller bearing retainer, and tapered roller bearing retainer and circular cone rolling element contact surface are provided with little hole that can store lubricant oil or lubricating grease.

4. a kind of rolling bearing retainer according to claim 1 and 2 with little hole, it is characterized in that: described rolling bearing retainer is a cylinder roller bearing retainer, and cylinder roller bearing retainer and cylinder rolling element contact surface are provided with little hole that can store lubricant oil or lubricating grease.

5. a kind of rolling bearing retainer with little hole according to claim 1 and 2 is characterized in that: described rolling bearing retainer is a ball bearing retainer, and ball bearing retainer and ball rolling element contact surface are provided with little hole that can store lubricant oil or lubricating grease.

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