RU2073134C1 - Rolling bearing - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: needle rollers provided with conical ends separate rolling bodies of the bearing. The side bearing races rigidly connected with the outer race of the bearing are provided with ring grooves of triangle cross- section for receiving the cones of the needle rollers. The cone angles of the ends of the needle rollers are 30- 35°. The angle of the triangle cross-section of the groove is 40-45°. EFFECT: decreased metal consumption and increased longevity. 4 cl, 5 dwg

Description

 The invention relates to mechanical engineering for ball and roller bearings.

 A rolling bearing is known, comprising an outer ring with lateral support rings rigidly connected with it, an inner ring and rolling elements located between them, spaced apart by separating rollers.

 The disadvantages of the known bearing include the large diameter and mass of the separating rollers, which is associated with a significant distance between adjacent balls, the presence of forces pushing the separating roller towards the inner ring, which is associated with the radial fixing of the separating rollers in the bearing, and the presence of structural difficulties when placing the separating rollers in bearing.

 The technical result of the invention is to eliminate the inherent disadvantages of the prototype, which ultimately leads to a decrease in the metal consumption of the separating device of the bearing.

This is achieved due to the fact that in a rolling bearing containing an outer ring with side support rings rigidly connected to it, the inner ring and the rolling working bodies located between them, spaced by separating rollers, the latter are made in the form of needle rollers with conical ends, and the side support rings made with annular grooves of a triangular section, while the ends of the needle rollers are located in said annular grooves. In addition, the angle of the conical ends of the separating needle rollers can be 30.35 ^o , and the angle of the annular in the cross section of the triangular groove 40.45 ^o . With a large distance between adjacent rolling working fluids, three separating needle rollers can be located.

 In FIG. 1 illustrates a rolling bearing with separating and grooved rollers using the example of a single-row ball bearing running on grease; figure 2 shows the relative position of the needle roller and the working fluid in the rolling bearing according to the invention; figure 3 is an enlarged view of the joint of the separating needle roller and the annular groove of the side support ring; figure 4 - presents the situation of the possible location of the separating needle roller; figure 5 is an embodiment of a rolling bearing with three separating needle rollers.

 The rolling bearing comprises an outer 1 and an inner 2 rings and rolling fluids 3 arranged between them, spaced apart by separating needle rollers 4 with conical ends. In the outer ring 1, the side support rings 5 are rigidly mounted, made with annular grooves 6 of a triangular section, in which the ends of the needle rollers 4 are located.

 Figure 3 shows on an enlarged scale the joint of the separating needle 3 and the annular groove of the side support ring 4.

The angle of the conical ends of the separating needle rollers 4 is 30. 35 ^o . The angle of the annular cross-section of the triangular groove 40.45 ^o . Thus, the minimum angular gap between the cone of the separating roller and the cross section of the annular groove is 5 ^o .

 The tip of the cone of the separating needle roller and the bottom of the triangular groove are rounded with a radius rsk of 0.2 rсi.

В результате там, где действуют значительные силы (контакт соседствующих рабочих тел качения с сепарирующим роликом), будет происходить качения и потери энергии окажется незначительной. Там же, где действуют незначительные силы (центробежное давление сепарирующего ролика на канавки), относительные потери на трение будут сравнительно высокими, а абсолютные -незначительными. В конечном счете потеря энергии на трение в подшипнике окажется меньше, чем в известном.The principle of operation of the separation device is based on the separation (separation) of the rolling zone from the slip zone. At the “point” of contact of the cylindrical part of the separating needle roller with the working fluid, almost pure rolling takes place, and at the contact point of the tip of the separating roller with the groove (see Fig. 3), sliding. This separation is ensured by a significant excess of the radius of the cylindrical part of the separating roller (rсi) over the radius of the point of contact of its tip with the groove (rк)

As a result, where significant forces act (contact of adjacent rolling fluids with the separating roller), rolling will occur and energy loss will be negligible. Where insignificant forces act (centrifugal pressure of the separating roller on the grooves), the relative friction losses will be relatively high, and the absolute losses will be insignificant. Ultimately, the friction energy loss in the bearing will be less than in the known one.

 In a ball bearing with the proposed separation device, when it is quickly moved away, one-sided selection of the total clearance between the balls and the separation rollers (ΣΔ) is not ruled out. As a result, one of the separating needle rollers, having lost contact with adjacent balls, can turn by some angle and fall out of the annular grooves.

To avoid this, it is necessary to maintain a certain ratio of sizes. Using figure 4, which shows the separating needle roller in the turned position, we find:
h _k = δ ₁ + δ ₂ + δ ₃ + δ ₄ (1), (1)
where δ ₁ is the maximum axial play of the needle in the grooves,
δ ₂ - axial displacement of the tip of the needle due to angular rotation,
δ ₃ - structural stock,
δ ₄ - the rounding zone of the output edges of the groove, if the groove is stamped.

(2)

(3) и
L_цил= 2tg Φ(R_ш+ΣΔ), (4)
где Lцил минимальная длина цилиндрической части сепарирующего игольчатого ролика.

(2)

(3) and
L _cyl = 2tg Φ (R _w + ΣΔ), (4)
where Lcyl is the minimum length of the cylindrical part of the separating needle roller.

If the distance between adjacent balls is significant, then the placement of a separating roller between them meets the difficulties illustrated in FIG. The center of the separating roller O ¹ cannot be positioned on the line connecting the centers of the balls, since the cylindrical part of the separating roller "cuts" into the body of the inner ring.

 The separating roller (shown by a dotted line) must be removed from the inner ring of the bearing, which is associated with the occurrence of a buoyancy force.

These difficulties are eliminated by installing three separating rollers between adjacent balls. In this case, the pressure of the tip of a separate separating needle on the annular groove decreases by 9 times. Center middle of the separation roller O $\genfrac{}{}{0ex}{}{\text{one}}{\text{2}}$ slightly rises from the line O-O, which is permissible.

 This embodiment of the rolling bearing leads to a decrease in metal consumption, saving lubrication.

Claims (3)

 1. A rolling bearing comprising an outer ring with lateral support rings rigidly connected to it, an inner ring and rolling elements located between them, spaced by separating rollers, characterized in that the separating rollers are made in the form of needle rollers with cone-shaped ends, and the lateral supporting rings made with annular grooves of a triangular section, while the ends of the needle rollers are located in said annular grooves. 2. The rolling bearing according to claim 1, characterized in that the angle of the conical ends of the needle rollers is 30 35 ^o , and the angle of the annular cross-section of the triangular groove is 40 45 ^o .  3. The rolling bearing according to paragraphs. 1 and 2, characterized in that with a large distance between adjacent rolling working bodies there are three needle rollers.

Images