DE1750203A1 - Inner jaw brake, especially for stopping two-for-one twisting spindles - Google Patents

Description

Dipl.-Ing. H. B. KAHLER ■ Dr.-Ing. W. STRONG

4-15O Krefeld · Moerser Straße 1 ^ O ■ Fernruf (O 21 51) 2O4 69

Date:

April 4th 1968

Our sign:

In the answer I am specifying 2 (3θ 67 311

Your sign:

Maschinenfabrik Heinz Weller, 4o5 Mönchengladbach, Siemensstrasse 18-24

Inner jaw brake, especially for stopping two-for-one twisting spindles

The invention relates to an inner shoe brake, in particular for stopping two-for-one twisting spindles, with two symmetrically arranged brake shoes, which are spread apart at their free ends by an actuating mechanism and are to be pressed against the drum wall.

Such inner shoe brakes are known in which the inner jaws are pressed against the brake drums with the aid of clamping pieces or eccentrics. When readjusting as a result of wear, however, the basic position of the operating lever is changed so that the clamping piece usually only actuates one brake shoe correctly. As a result, the bearing of the twisting spindles is loaded on one side, which is particularly noticeable in the case of central spindle bearings with automatic unbalance compensation.

The finding is therefore essential to the task on the basis of the internal shoe brake, in particular the stopping of double

ÖO9882 / 0701

D «uteoh · Bank AO 1O3 / 1Ö2Ö Krwteld ■ PoeteoheoH Eseen 4Ο55

to create wire twisting spindles that are always approximate act with the same force on both brake shoes.

The solution to this problem is that the actuating mechanism for the inner shoe brake, a bolt with a bolt arranged approximately in the middle between the two brake shoes has on this seated with play rotatable casing body, which by moving the bolt from the inside against the two is to press free ends of the brake shoes.

To a favorable force attack of the jacket body on the

To enable brake shoes, the invention also provides that the brake shoes are beveled at their free ends in the contact area of the casing body.

According to a further feature of the invention, the jacket body bearing bolts sit on one end of an angle lever rotatable about a fixed axis and the other end of the angle lever serve as an operating arm for the brake. The operating arm is preferably at least partially When viewed in the operating direction, it is easily bendable, for example in the form of a leaf spring

In the drawing, the invention is based on an exemplary embodiment illustrated in more detail. Se show:

flg. 1 shows a thematic longitudinal section through the

erfindungsgemäsee inside shoe brake, and Hg. 2 shows a sohematisoh held Horizon talsohnitt duroh the brake.

009882/0701

The shaft 2 of a twisting machine (not shown) is rotatably seated on a bearing spindle 1 in an axial extension. To the Shaft 2 is rigidly attached to a brake drum 3 which, with its drum wall 3a, has the brake mechanism designated as a whole by 4- over grip, and in turn on a rigidly attached to the bearing spindle 1 attached Plansch 5 is mounted.

The brake mechanism 4 has two symmetrically arranged brake shoes 6 which can be pivoted about a common bearing pin 7. A ring spring 3 holds the two brake shoes 6 in \ open position. Against the restoring force of the spring 5 *, the 'brake shoes 6 can be pressed against the brake drum wall 3a by an actuating mechanism 9, thereby braking the twisting machine. This actuation mechanism 9 consists of an angle lever 1o which can be pivoted about a stationary axis 11. Approximately in the middle between the two brake shoes 6 sits on one leg 1oa of the angle lever a bolt 12 which carries a casing body 13 that surrounds it with play and is rotatable.

The other leg 10ob serves as an operating arm for the brake. It has a feil 1Ob ₁ and 1ob ₂ , the part 1ob _{2 being designed} to be flexible in the operating direction, ie in the direction of the * arrows _a and b as a leaf spring. The free end of the part

ο 1ob ₂ is, moreover, with a further control stand 14

co connected.

o Upon actuation of the operating arm 1ob in the direction of the

o Arrow b presses the bolt 12 and thus the jacket body 13 against the inner sides 6a of the free ends of the brake shoes 6.

As a result, the brake shoes 6 are pivoted about the bearing pin 7 and pressed against the drum shell 3a, so that The shaft of the twisting spindle, which is rigidly attached to it, and thus the twisting spindle itself, is braked via the brake drum 3.

Since the shell body 13 sits with play on the bolt 12, there is always an even pressure of both brake shoes 6 against the Ensured drum wall 3a, regardless of whether a certain wear has already occurred or not. In addition, after a major wear of the brake shoes, only the casing body 13 could against another Brake body with a larger outer diameter can be replaced.

The flawless and force-wise favorable contact of the dumbbell body 13 on the inner sides 6a of the brake shoes 6 is used also, as can be seen from the drawing, the inner sides be bevelled in the area of the contact with the jacket body 13.

Finally, it should be pointed out that the design of part 1Ob _{2 of} the actuating arm 10b as a leaf spring enables a favorable actuation of the brake to the extent that when the force applied is increased, not all of the force is transmitted via the casing 13 to the brake shoes 6a but in part is absorbed by the bending of the spring part.

009882/0701

Claims (3)

Expectations 1. Inner jaw brake, especially for shutting down two-for-one twisting spindles, with two symmetrically arranged brake shoes, which at their free ends by an actuating mechanism are spread apart and to be pressed against the drum wall, characterized in that the actuating mechanism (4) a bolt (12) arranged approximately in the middle between the two brake shoes (6) with a bolt (12) seated thereon with play Has casing body (13) which by moving the bolt (12) from the inside against the two free ends of the brake shoes (6) is to be pressed. 2. Inner shoe brake according to claim 1, characterized in that the brake shoes (6) have a bevel (6a) at their free end in the contact area of the casing body (13). 3. Inner shoe brake according to claim 1 or 2, characterized in that the bolt (12) at one end (1oa) of an angle lever (io) pivotable about a fixed axis (11) sits and the other end (1ob) of the angle lever (io ) serves as an operating arm for the brake. 4. Inner-shoe brake according to claim 3, characterized in that the operating arm (1o) is at least partially slightly bendable, seen in the operating direction (a, b), for example in the form of a leaf spring (1ob ₂ ) . 009882/0701 Le e rs e ite