RU66452U1 - FRICTION BEARING - Google Patents

Abstract

The utility model relates to the field of mechanical engineering and can be used in nodes with preload. The proposed utility model solves the problem of smooth unloading of rolling elements from the working load and increase the durability of the bearing. The rolling bearing comprises an outer and an inner ring with conical raceways, a thrust flange on one of them, which is equipped with means for unloading the rolling elements from the work load in the form of a local recess of the working surface, and conical rolling bodies located between the rings. For smooth unloading of rolling elements from the working load, the length of the local deepening of the working surface of the thrust side is determined by the expression:

where l is the length of the means of unloading the rolling elements from the working load along the working surface of the thrust side; d _max - the largest diameter of the raceway of the inner or outer ring of the bearing; z is the number of rolling elements in the bearing. Using the proposed utility model will allow during the operation of the rolling bearing to ensure smooth unloading of the rolling elements from the sliding friction forces and the working load, improve lubrication conditions and prevent the bearing from jamming.

Description

The utility model relates to the field of mechanical engineering and can be used in nodes with preload.

A rolling bearing (1) is known, mainly of low-speed slewing rings containing outer and inner rings, one of which is equipped with a means of unloading the rolling elements from the working load in the form of a local depression of the raceway, and the rolling bodies located between them. Local deepening of the raceway allows the raceways to be freed from the working load one by one and thereby to prevent the bearing from jamming.

The disadvantage of this bearing design is that when performing a local deepening on the raceway of the bearing having the taper of the working surface, it is necessary to provide the required angle, since otherwise the unloading of the rolling bodies from the working load will occur unevenly, which will lead to a turn of the conical rolling bodies and emergency jamming of the bearing.

A known rolling bearing (2), adopted for the prototype, containing the outer and inner conical raceways of the ring, a thrust side on one of them, which is equipped with a means of unloading the rolling elements from the working load in the form of a local recess of the working surface, and conical bodies located between the rings rolling.

The disadvantage of this bearing design is that the means of unloading from the working load in the form of a local deepening of the working surface of the thrust side, made in a small area, cannot provide smooth unloading and load of the rolling elements, especially at high speeds of rotation. As a result, when unloading rolling elements from the working

loads will be hit in the recess area, which will lead to a decrease in bearing life.

The proposed utility model solves the problem of smooth unloading of rolling elements from the working load and increase the durability of the bearing.

The achievement of the technical result is achieved by the fact that in the rolling bearing, containing the outer and inner rings with conical raceways, there is a thrust side on one of them, which is equipped with means for unloading the rolling elements from the working load in the form of a local recess of the working surface, and conical located between the rings rolling elements, the length of the local deepening of the working surface of the thrust side is determined by the expression:

where l is the length of the means of unloading the rolling elements from the working load along the working surface of the thrust side;

d _max - the largest diameter of the raceway of the inner or outer ring of the bearing;

z is the number of rolling elements in the bearing. The proposed utility model is illustrated by drawings.

Figure 1 presents the cross section of the proposed rolling bearing.

Figure 2 shows the inner ring with a conical raceway and a thrust side, which is equipped with a means of unloading the rolling elements from the work load in the form of a local recess of the working surface.

The rolling bearing comprises an outer ring 1 with a conical raceway, an inner ring 2 with a conical raceway and a thrust flange 3, on the working surface of which means

unloading from the working load in the form of a local depression 4 conical rolling elements 5.

The length of the local recess 4 is determined from the condition of smooth entry and exit of the rolling elements into the unloading zone. This is possible in the case when the rolling bodies will be released in turn from the working contact load and the sliding friction force between the end of the rolling bodies and the thrust side. Therefore, the length of the recess must be chosen so that the previous rolling body has not yet had time to fully enter the load, and the next one is already partially unloaded. In such a situation, each conical rolling body will be gradually unloaded and at any time during operation, only one rolling body will be turned off from the load, which will provide higher stability of elastic deformations. Based on this, the length of the recess is determined from the expression:

where l is the length of the means of unloading the rolling elements from the working load along the working surface of the thrust side;

d _max - the largest diameter of the raceway of the inner or outer ring of the bearing;

z is the number of rolling elements in the bearing.

The proposed rolling bearing works as follows. When it is loaded onto the conical rolling elements 5, a buoyant force acts. In order to keep them in the working area, on one of the rings, more often on the inner 2, an abutment bead 3 is used. During the operation of the bearing, friction sliding occurs between the ends of the conical rolling elements 5 and the abutment 3, accompanied by rather intensive wear of the rubbing surfaces. When the bearing rotates, each rolling body is 5, and, moreover,

only one, gradually falling into the unloading means in the form of a local recess 4, the inner ring 2, is pushed out and freed from the working contact load and the sliding friction force between the thrust side 3 of the inner ring 2 and the end face of the conical rolling body 5. In this case, the lubrication conditions are improved, and jamming of the bearing is prevented.

Sources of information taken into account during the examination:

1. Auth. St. USSR No. 1099130, F16С 19/00, 1984 - analogue.

2. Application for invention of December 23, 2005 No. 2005-140540 / 11 - prototype.

Claims (1)

A rolling bearing comprising an outer and an inner ring with conical raceways, a thrust plate on one of them, which is provided with means for unloading the rolling elements from the working load in the form of a local recess of the working surface, and conical rolling elements located between the rings, characterized in that the length of the local deepening the working surface of the thrust side is determined by the expression

where l is the length of the local deepening of the working surface of the thrust side; d _max - the largest diameter of the raceway of the inner or outer ring of the bearing; z is the number of rolling elements in the bearing.