SU861794A1 - Apparatus for switching assemblies of gear box toothed gears - Google Patents

Description

one

The invention relates to mechanical engineering and can be used in machine tools.

A device for switching gearbox gear units is known, comprising a selector disk, kinematically associated with rotational and translational drives, and a control system l.

The disadvantage of this device is the non-automatic switching of the rotational speed of the output shaft.

The purpose of the invention is to provide an automatic selection of the unavailable speed of the output shaft.

For this, the control system is designed as a shaft rotation speed adjuster and electrically connected with the transmitter position transmitter of the selector disk, consisting of a fixed card with contacts and a sliding contact, kinematically connected with the rotational drive of the selector disk.

FIG. Figure 1 shows a device for automatic switching with a longitudinal slit along a rotational drive of the selector dial; Fig. 2 is the same, with a slit taken along a translational drive.

The device comprises a selector disk 2 mounted in the housing 1, which will throw matically connected with the drive 3 of the rotational movement and the drive 4 of the translational movement (Fig. 2).

To the housing 1, the board 5 is rigidly attached with contacts to which the unit of rotational speed is electrically connected through the sliding contact 6

10 output shaft (not shown).

The board 5 and the sliding contact 6 are a transducer for the position of the selector disk.

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The rotational movement of the selector disk 2 with the drive 3 is carried out by means of a cylindrical gear train 7, 8, 9 and a bevel gear train 10, 11. 20 The position of the sliding contact 6 on the board 5 is indicated by the pointer 12 of the position.

The selector dial 2 with the 4 translational drive is coupled with 25 by means of the plug 13 and the stem 14.

In the holes of the selector disk 2, spring fingers 15, 16, 17, and 18 are inserted in a specific sequence, mounted in the end 30 holes of the gear racks 19, 20, 21,

22, found in gearing with gear wheels 23 and 24. On the slats 20 and 22, forks for switching gear blocks 25 and 26 are fastened (not shown in the drawing).

The device works as follows.

In automatic mode, a numerical control system (not shown) on board 5, corresponding to a given rotation speed of the gearbox output shaft and defined by the selector dial 2, is given a signal from the rotational speed adjuster. Simultaneously, the drive 4 is switched forward. The rod 14 with the plug 13 will move to the right and the Internet will move to the same side the selector disk 2, while the rail of the rails located in the holes of the disk 2 will be released. In the rightmost position of the disk 2, a signal is applied to the drive 3 of the rotational motion, from which the disk 2 rotates through gears 7, 8, 9, 10 and 11, at the same time with which the sliding contact 6 rotates along the fixed contacts of the board 5 until it aligns with a contact that was previously signaled. The scheme of matching with the setpoint adjuster of the rotational speed of the output shaft of the gearbox operates; and the position converter issues a command to stop the drive 3. The drive 4 is turned on in translational motion, the rod 14 with the plug 13 is moved to the left and returns the selector dial 2 to its original position. When the axial movement of the disk 2 interacts with the end surface of the fingers of the rails, some of which

(16, 15) freely passes into the openings of the disk 2 facing them, and the pin 17 of the rail 21 moves with the end face of the disk 2. Each moving rail 20, 22, etc., carrying the shift fork 25, 26 switches gears blocks, Installing the new required rotational speed of the gearbox output shaft.

This device is simple, compact and provides

o full automation of the process of switching gear box gear units, which will enable its use in numerical control machines.

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Claims (1)

1. USSR author's certificate №301482, cl. F16 H 3/20, 1969 (prototype).