SU776869A1 - Apparatus for limiting rotation angle of machine tool elements - Google Patents

Description

one

The invention relates to the field of machine building and can be used in machine tools and mechanisms for limiting the angles of rotation equal to 360 ° + p.

A device for limiting the rotation angle, consisting of fixed and rotatable, two-disk parts, is known. The disks are connected by several rods, each of which is carried by a switch having two positions, and depending on which it acts on the limit switches located on the fixed part. Switching the switch from one position to another is carried out using switch stops controlled by solenoids (1).

A disadvantage of the known device is the complexity of its design.

The aim of the invention is to improve the design of the device.

This goal is achieved due to the fact that the device contains two switching stops, two switches and two limit switches, the switching stops being rigidly fixed to the fixed part, and the switches turned and shifted in the axial direction are made in the form of a two-way lever and a leaf. connected with the lever. In order to provide braking followed by an exact stop of the rear part, the device contains an additional lobe mounted coaxially with the lobe, rigidly connected with it and shifted relative to it, and the limit switches are made double.

FIG. 1 depicts the proposed

device, general view; in fig. 2 - view

10A-A of FIG. one; in fig. 3 is a view of FIG. one;

in fig. 4 is a view BB of FIG. one; in fig. five-

view gg fig. one.

The device consists of a swivel unit.

I, having the ability to rotate 15 in supports 2 and 3, and a fixed node 4. On

the rotary node 1 is rigidly fixed to the housing 5 and 6, spaced in a vertical plane along the axis of the movable node. In the buildings 5 and 6 on the axis x 7 and 8, two shoulders are attached levers 9 and 10 and petals

II, 12, 13 and 14. The levers 9 and 10, and therefore the petals 11, 12, 13 and 14, have two positions, which are fixed by the latches 15 and 16 by means of springs 17

25 and 18. Screws 19 and 20 are installed to adjust the spring force. Limit switches 21, 22, 23, and 24 are fixed on the fixed unit 4, each of which is located on the motion path of petals 14, 13, 12, and I.

fixed station also fixed fixed switching lugs 25 and 26, on axis x 27 and 28 which are installed rollers 29 and 30. Petals 12 and 13 are lagging in the direction of rotation, respectively, from the petals 11 and 14 at an angle a.

The device works as follows.

The swivel unit 1 is rotated in the supports 2 and 3 of the fixed unit 4 (Figures 1, 4). In the initial position of the turning unit 1, the petals 11 and 12 interact with the end switches 23 and 24. When the turning unit 1 rotates clockwise from position I to position IV at an angle of 360 ° + (p, body 5 with two shoulders lever 9 and petals 11 and 12 comes to position P, in which the double-shouldered lever 9 slides over the roller 29 of the fixed switchable rest 25 and turns the petals 11 and 12 (see position III), so that upon further rotation of the node 1 the petals 11 and 12 in position I do not interact with limit switches 23 and 24, and turning unit 1 goes to the end the second position IV. At the same time, from the initial position I (see Fig. 3), the second body 6 with lobes 13 and 14 and the double-arm lever 10 rotates to the end position IV also through an angle of 360 ° + p, passes the line of the limit switches 21 and 22, without causing them to trigger, since the petals 13 and 14 are rotated. Upon further rotation of the two shoulders lever 10, it rolls onto the roller 30 of the fixed, switched support 26 and turns the petals 13, 14 into the working position (Fig. 3, pos. P1).

The clips 15, 16 (see Fig. 1) with the help of springs 17 and 18 fix the double-arm levers 9 and 10, and therefore the lobes 11, 12, 13 and 14 in the working position.

In position IV (see Fig. 3), petals 13 and 14 are sequentially interacting with limit switches 21 and 22. First one of the petals contacts the limit switch and the rotational speed of the rotary unit 1 is reduced, then the second petal and the limit switch interact exact stopping of the mobile node.

To limit rotation angles when reversing, a second identical device should be installed.

Claims (2)

1. Device for limiting the angle of rotation of the machine elements made in the form of two parts: fixed, on which limit switches with switching stops are installed, and rotary carriers, characterized in that, in order to increase reliability of operation, the switching stops are rigidly fixed on the fixed part, and the switches are turned and shifted in the axial direction and made in the form of a pivotal double arm and a petal, rigidly connected with the lever. 2. The device according to claim 1, characterized in that, in order to improve the accuracy of setting the angle of rotation, it contains an additional lobe mounted coaxially with the first petal, rigidly connected with it and shifted relative to it, and the limit switches are made doubled. Sources of information taken into account in the examination 1. US patent No. 3153705, CL. 200-18, publ. 1964.