SU1732043A1 - Ball bush for rotary and reciprocate motion - Google Patents

Abstract

Usage: in mechanical engineering for cranes, wheel bearings which require longitudinal movements along their axes. Essence: ball bushing is made of coaxially arranged two pipes with sockets for placing balls in them. From the ends of the socket bushings are made half-out; dug. In this case, the outer tube is made of two longitudinal parts, each joint of which is fastened by means of a dovetail. 5 il.

Description

The invention relates to mechanical engineering, in particular to cranes, whose wheel bearings sometimes require longitudinal movements along their axes.

For fixing crane wheels in crane bearings, ball or roller bearings are commonly used, which rigidly secure the travel wheels along their axes of rotation. As a result, when the crane is skewed (running one side of the crane relative to the other, for example, due to the loaded truck on the opposite side of the crane), the diagonal wheels of the bridge spread out causing a change in friction force between the flanges of the crane rails, 1 additional drive power consumption the bridge mechanism, increased wear of the flanges of the wheels and rail heads, and other harmful phenomena {cracking in the axlebox sections of the beams and metal structures of the bridge).

Known designs of crane wheel bearings are proposed to eliminate

skew bridges bridge and gantry cranes.

However, all of them are designed for the use of supports, which are firmly attached to the crane running wheels along their axes.

Closest to the invention is a self-lubricating rolling bearing separator, consisting of two concentric rings with roll braces and jumpers between them,

The disadvantage of this separator is that it cannot absorb axial forces during rotation, as well as reciprocate.

The aim of the invention is to create a linear bushing, transmitting large radial forces and axial movements, as well as a reduction in radial dimensions.

The goal is achieved in that the sleeve, including the separator and balls, is characterized in that, in order to reduce the radial size of the bearing, it does not have external and internal sleeves (rings), and the separator additionally provides

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The outer sleeve, the inner and outer sleeves are made in the form of pipes, the outer part of which is made of two longitudinal halves, fastened by a dovetail joint, the balls between these pipes are placed in spherical sockets with openings, the largest size of which is smaller than the diameter of the balls.

A radial-axial-type ball bushing transfers radial loads from a rotating part (for example, a crane sprocket) to the shaft only through balls placed in a separator made in the form of two tubes covering these balls at the sides. The separator does not accept radial loads. The end radial rows of balls protrude outward from the ends of the separator tubes and, therefore, in contact with non-rotating (or rotating) parts mounted on the axis (or shaft), they can rotate. Therefore, the sleeve can easily move along its axis. During operation, the sleeve rotates around its axis (or shaft) and at the same time easily moves along an axis or shaft when in contact with parts mounted on the latter. The radial-axial ball bushing does not create significant trainee forces when axially moving the bridge or gantry support during the skew (with one axle bridge of the bridge relative to the other, goy) and thus forming the Sulshch ne, je-oc m-x loads the jamming time of the crane wheels,

FIG. 1 shows a sleeve, front view; in fig. 2 is a view A of FIG. one; in fig. 3 - sections BB and B-B in FIG. one; in fig. A - node I in FIG. one; in fig. 5 is a sectional view BB in FIG. 2

The sleeve is made of separator and balls. The separator has an inner 1 and outer 2 pipe (fig.Z). The outer tube is made of two longitudinal halves, fastened together by two joints in the form of a dovetail tail 3. Balls 4 are placed in spherical sockets 5 (figure 4), stamped in outer 1 and inner 2 separator tubes. The shaft rests on the protrusions of the balls 6, and the sleeve (for example, the crane sprocket) rests on the projections of the balls 7. The balls of the end radial rows of the balls contact the parts mounted on the shaft by the protrusions 8 (Fig. 5).

The sleeve has a diameter outside D and inside d, and a length I. The pitch between two radial rows of balls is t.

The sleeve works as follows.

Assume that the sleeve is inserted into the hub of the traveling wheel of the crane. The hole diameter of the hub must be equal to D. a

shaft diameter d. The outer points 9 of the protrusions 7 (figure 4) of the balls of the bushings take the load from the hub of the crane traveling wheel, and the points 10 of the projections of the 6 balls transfer this

the load on the shaft of the running wheel, therefore, radial load is perceived only by balls A, and pipes 1 and 2 of the separator do not perceive it.

The axial load is perceived by the balls of the end radial rows. This load is transmitted by the projections 8 of the balls (Fig. 5). Since the sleeve is radially axial, under the action of a small axial force, it will easily move along the shaft, while

5 how the radial load on it can be quite large, since it can have several radial rows of balls. For the connection in the form of a dovetail 3 (figure 4) two halves are connected

0 outer pipe 2 separators. Spherical sockets 5 balls 4 do not heal the radial loads.

The technical and economic effect of the proposed sleeve is that its half radial size is half the cross section smaller than the radial size of a similar section of a conventional ball or roller bearing 1.25-2 times. The shaft inserted into the sleeve is smaller than the inside diameter of the hole

0 parts, which is worn on this sleeve by the amount of two thicknesses of the outer and inner rings. In addition, the design of the sleeve allows it to load the balls with large radial loads.

5 Load the proposed sleeve more

the calculated radial load of a single-sided radial bearing is approximately m times, where m is the number of radial rows of this sleeve.

0 The advantage of the proposed sleeve is its ability to move along its axis along the shaft (or axis) on which it is mounted. This feature of the sleeve is required in a number of constructions of assembly units,

Claims (1)

5 for example, in the support nodes of the traveling crane wheels of bridges of bridge, gantry, gantry and reloading cranes. Claims of the invention Ball sleeve for rotational and 0 reciprocating movements containing balls and a body made of coaxially arranged two pipes with sockets for placing balls in them, characterized in that 5 increase the load capacity, on the side of the socket ends of the socket, are additionally half-open, while the outer pipe is made of two longitudinal parts, each joint of which is fastened by means of a swallow tail. 1 Vida Fig.Z gd 5