RU1831601C - Method for assembling sageness radial roller bearings and device for this method implementation - Google Patents

Abstract

- Usage: in mechanical engineering, in automation tools for the assembly of rolling bearings. SUMMARY OF THE INVENTION The method consists in supplying an outer ring and installing a set of rollers therein in an upright position on the ends. The inner ring is mounted on the end of the rollers, compressed air is supplied under it and held in suspension by air. The rollers are held upright by periodically exposing the upper ends to the inner ring and acting on them with compressed air. The rollers are moved from the center to the periphery of the outer ring, after which the air supply is stopped. A device for implementing the method comprises a base with a roller feed mechanism mounted thereon, an inertial rotation mechanism with an assembly table and an inner ring feed mechanism. The feed mechanism of the inner ring is made in the form of a sleeve with a suction cup placed inside it, mounted with the possibility of vertical movement. Through holes are made uniformly spaced around the circumference of the sleeve at the lower end of the sleeve. The diameter of the end face of the sleeve exceeds the diameter of the assembly table. 2 sec n. f - ly, beat. sl c

Description

The invention relates to the field of assembly of bearings and can be used to create means for automating the assembly of rolling bearings, for example for assembling a bearing of an end sprocket of a chainsaw.

The aim of the invention is to increase the reliability of the assembly.

The method is implemented as follows.

Feed and install the outer ring of the bearing. A set of rollers is loaded into the inner cavity of the outer ring, setting them upright on the ends. On the upper ends of the rollers set the inner ring. The rollers begin to accelerate by rotating the support with the outer ring mounted on it. Simultaneously with the start of rotation of the assembled bearing, jets of compressed air are introduced into the roller placement zone under the inner ring. As a result of this, an air cushion is created under the inner ring which holds the inner ring in suspension. From the action of air currents, the rollers rise above the supporting surface, which leads to the disappearance of the friction force between it and the rollers, and from the action of centrifugal forces from rotation

with

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and further from the jets of compressed air to their lateral surfaces, the rollers move from the center to the periphery of the inner part of the outer ring. In this case, the upper ends of the rollers are exposed to the inner ring, which is also in suspension. This keeps the rollers upright and moving them from the center to the periphery occurs at their lower ends. As a result, the rollers, overcoming the inertia of the rollers already occupying the raceway, are arranged in one row along the periphery of the inner part of the outer ring (on the treadmill), forming its free space in the center. Without stopping the rotation of the outer ring, the supply of compressed air is stopped. In the formed free space, an inner ring is installed under the influence of its own gravity.

The proposed method can be implemented in the proposed arrangement for assembling full complement radial roller bearings.

Figure 1 shows a device for assembling a full complement of radial role-bearings, General view; in FIG. 2 is a view along arrow A in FIG. 1 (after loading the clips); in FIG. 3 - node I in FIG. 1 (after filing the inner ring); in FIG. 4 - the same (at the beginning of the acceleration of the rollers); in FIG. 5 - the same (at the end of the acceleration of the rollers; in Fig. B - the same (after installing the inner ring).

A device for assembling full-complement radial roller bearings includes a frame 1, on which are placed a feed mechanism 2 of the rollers 3, an inertial rotation mechanism with an assembly table 4, a feed mechanism 5 of the inner ring 6, cassettes 7, 8 for the outer ring 9, which in this case is an asterisk, and cheeks 10, cassette 11 for finished assembly units.

The feed mechanism 2 of the rollers 3 includes a vibratory hopper 12 with a feed tray, a device 13 with a receiver for a set of roller groups 3, a manipulator 14 with a vacuum gripper 15 for feeding groups of rollers 3. The inertial rotation mechanism with the assembly table 4 consists of a plate 16. mounted on the axis in bearings. a drive in the form of an electric motor 17 and a braking and fixing mechanism (not shown). A slot 18 is made on the faceplate 16 along the axis of which a central pin 19 with channels 20 and pins 21 formed along it along a circumferential circumference is formed. Internal cavity of the outer

ring 9 after installing it in the socket 18 on the cheek 10, which is the supporting surface, forms an assembly stage 4 on the inertial rotation mechanism.

Inner ring feed mechanism 5

6 includes a vibratory hopper 22 with a feed tray, a receiver 23, a manipulator 24 with a vacuum gripper 25. The vacuum gripper 25 (Fig. 3) is made in the form of a sleeve 26, inside which a suction cup 27 is placed with the possibility of vertical movement. At the lower end of the suction cup 27, through holes 28 are made uniformly spaced around the circumference, with the possibility of

5

supply of compressed air or vacuum through them. The sleeve 26 is configured to overlap at the top with its lower end 29 the periphery of the assembly table where the rollers are located 3. A vacuum grip 25 through a switch (not shown) is connected to the compressed air and vacuum line.

The device is also provided with a control unit (not shown).

The device operates as follows.

From kasg-from 7, 8, placed on the bed 1, in the socket 18 of the inertial mechanism on the pins 19,21 (Fig. 2), set the cheek 10 and put on it the outer ring 9. the inner cavity of which forms the assembly table 4. From the vibrating hopper 12 on the feeder tray, the rollers 3 enter the device 13 of the set of roller groups; the set of rollers 3 is dialed into the slots

5 of the receiver of the tool 13, evenly spaced around the circumference, two rollers 3 in each socket.

From the vibratory hopper 22 through the feed tray enters the receiver 23 internal

0 ring 6.

On command from the control unit, the vacuum gripper 15 of the manipulator 14 captures a group of rollers 3 from the receiver of the device 13 and installs them in the assembly

5, stage 4 of the inertial mechanism, after which the manipulator 14 returns to its original position.

At the same time, a command arrives at the beginning of the work of the feed mechanism 5

0 of the inner ring 6. A vacuum grip 25 of the manipulator 24 from the receiver 23 captures the inner ring 6 and installs it on the upper ends of the rollers 3. The ring 6 is installed by the central hole

5 to the central pin 19. by which it is centered relative to the outer ring 9, while the sleeve 26 is in such a position that a guaranteed minimum clearance is formed between its lower end 29 and the outer ring 9.

The bottom end 29 overlaps from above the peripheral zone of the assembly table A, where the rollers 3 are placed (Fig. 3).

In this position, the vacuum pickup 25 of the manipulator 24 remains until the end of the assembly.

On command from the control unit, the vacuum pick-up 25 is disconnected from the vacuum and compressed air is supplied to it. At the same time, an electric motor 17 is turned on, which rotates the faceplate 16 of the inertial mechanism (Fig. 2). The jets of compressed air passing through the through holes 28 made at the lower end of the suction cup 27 and the longitudinal channels 20 of the pin 19 create an air cushion under the suction cup 27 and the inner ring b, while the chrysosca 27 is mounted with vertical movement and the inner ring 6 are lifted above the rollers 3, moving into the sleeve 26. Freed from the action of gravity created by the mass of the inner ring 6 and suction cups 27, the rollers 3 under the action of inertial forces created by the rotation of the assembly table 4, and additional the air stream of compressed air directed from the center of rotation moves to the periphery of the assembly stage 4. In this case, the upper ends of the rollers 3 are exposed to the inner ring 6, which is also in a suspended state. This holds the rollers 3 in an upright position and moving them from the center to the periphery of the assembly table 4 occurs at their lower ends. As a result, all the rollers are arranged in one row along the periphery of the assembly table (on the treadmill of the outer ring 9).

Since the bottom end 29 of the sleeve 26 is configured to overlap the periphery of the assembly stage 4, when the rollers 3 are accelerated, they are subjected to inertial rotation forces and additional compressed air, and it is impossible to eject them beyond the assembly stage.

On command from the control unit, the vacuum pickup 25 is disconnected from the compressed air line, while the faceplate 16 continues to rotate.

Inside the outer ring 9, under the inner ring 6, free

the space into which the inner ring 6 is installed under the influence of its own gravity and the additional action of the gravity of the suction cup 27, having lost the lifting force from the "air bag".

Subsequent commands from the control unit stop and lock in the initial position of the inertial

10 of the rotation mechanism and retraction of the manipulator 24 to its original position.

The upper cheek 10 is mounted and the assembled bearing assembly of the end sprocket of the chainsaw is fed into the cassette 11.

15 The cycle then repeats.

Claims (2)

The claims 1, The method of assembly of full-complement radial roller bearings, which includes feeding the outer ring, installing a set of rollers in it in an upright position at the end, feeding the inner ring with subsequent acceleration of the rollers and installing the inner ring, is distinguished by the fact that, in order to increase reliability assemblies, the inner ring is mounted on the upper ends of the rollers, compressed air is supplied under it, with the help of which the ring is kept in suspension, and the rollers are kept in the vertical position by periodic action of the inner ring on their upper ends and act on them with compressed air, moving them 5 from the center to the periphery of the outer ring, after which the air supply is stopped. 2. A device for assembling cage-free deep groove ball bearings, comprising a base with a roller feed mechanism mounted thereon, an inertial rotation mechanism with an assembly table and an inner ring feed mechanism, characterized in that, for the purpose of 5 to increase the reliability of the assembly, the feed mechanism of the inner ring is made in the form of a vacuum grip in the form of a sleeve with a suction cup placed inside it, mounted with the possibility of vertical 0 of movement, through holes are made uniformly spaced around the circumference of the sleeve, the diameter of the sleeve end exceeding the diameter of the assembly table. 5 / 4 f5 25 8 F 22. 5 //  4 /, I / 4 F --- f. |} +4 W Puz.i m / z ФЦГ, 5 np I A. PC Fugue. 5; .Ftsg. 4 E %%