DE1902940B2 - FORCE ACTUATED CONTACT OF AN ELECTROMAGNETIC CONTACTOR - Google Patents

Description

1 2

The invention relates to a non-positively movable contact piece. This enables an activated contact of an electromagnetic switching-free movement of the movable contact piece in the contactor, whose closing pressure of the contact is held in the direction of the fixed contact piece with a good side-generating spring at one end at the other end in the closing direction 5, the carrier is designed as a leaf spring, which enables a good current conduction through the carrier to be connected to the movable contact piece,
see carrier presses. Is particularly functionally reliable and space-saving

When such contacts are closed, the spring is designed as a helical spring, whose the extremely damaging vibrations of the moving axis in the direction of the closing movement of the moving one Contact piece against the fixed contact piece, io borrowed contact pieces through the point of contact the so-called bruises. Many constructions of the contact pieces runs.

are known to prevent bruises. In the drawing, the object is to be. So this problem z. B. according to the claims using the example of a partially cut Austrian patent 194 472 represented by contactors with hinged armature magnet.
Order of a contact bridge between two springs 15 The hinged armature drive of or according to the USA patent 3 243 546 is arranged in a housing 1 by means of contactors. The drive consists of an arrangement of a movable contact piece and an iron core 7, which can be excited by a coil 2 - compression spring on the contact acting as a lever, and a hinged armature 14 pivoted in the housing 1 at different distances from the axis of rotation. This wears a tight of the lever to be loosened. In the first-mentioned 20 connected to it switching part 17, which has two longitudinal fork-shaped fingers 19 and 20, the contact bridge vibrates in the direction of springs or torsional vibrations of the contact bridge in a block 27 placed on the housing 1 arranged. This has a fixed contact piece 29 around one of the contacts or around the attachment point, which cannot be avoided on a bracket 30 on the spring. In the construction 25 is riveted. The bracket carries on an extension of the USA patent specification, the bruises are only adjustable in amplitude by the lever 31 with a clamping ring 32 which can be adjusted in height by means of a screw 33, with the help of which a reduction is made. End line can be clamped.

The task is therefore to achieve that a movable contact piece 34 is fastened to the movable contact piece after the first leaf spring 35, which is bent into a U-shape. The touch of the fixed contact piece on this possible lower end 36 of the movable contact piece 3 remains firmly in place, onne, w ^; e in the previous supporting leg of the leaf spring protrudes between the constructions inevitably, vibrations against fingers 19 and 20 of the switching part 17. The shorter run the fixed contact piece, through which the other leg of the leaf spring is on the movable contact piece one more or more times Fastened bracket 37, which is lifted from the rest of the fixed contact surface. is designed similar to the bracket 30, which

According to the invention, this object is thereby carried out by fixed contact piece 29. Between the bracket 37 solves that the spring pushes at the point on the carrier and with the movable contact piece 34, on the free leg of the leaf spring 35, which is seen as the movable contact piece, there is a is consolidated. 40 coil spring 38 arranged by projections

With this construction, too, the support points behind can be held in their position,

swing of the contact carrier after the impact of the The coil spring 38 presses at the point on the

movable contact pieces on the fixed contact inside of the leaf spring 35, on the outside

stiick cannot be avoided. The contact carrier is the movable contact piece 34 on the side of the leaf spring

but between the fixed contact piece and pressure 45 is attached. This is therefore against the

spring held at one point in such a way that fixed contact piece 29 is pressed when the finger 19

During the subsequent oscillation of the contact of the fork, the end 36 of the free spring leg

at this point releases a cutting node. The drawing shows the anchor 14 in the

must form. The contact carrier leads, as well as the rest position, in which the electromagnet is switched off

in all constructions held against, after 50 is and the contact pieces 29 and 34 are in contact

Impact of the contact pieces is probably a vibration. When tightening the hinged armature 14 pushes

movement through, but without bouncing the fingers 19, the spring end 36 against the pressure

of the movable contact piece. The coil spring 38 in the shown in dashed lines

Contact pieces remain during the oscillation of the opening position.

Contact carrier in firm contact and lead all 55 Instead of contact, as shown in the drawing

if there is a slight rolling movement towards each other. provides, to train as a normally closed contact, this can also

In the known constructions, bounce should be designed as a working contact. In this case

gene either by reducing the moving is the fixed contact piece 29 on the bracket 37 and the

Masses or attached to the bracket 30 by particularly careful placement of leaf spring 35, so that the

the contact pieces are avoided. This dimension 60 contact is closed when the hinged armature is tightened

but only ever lead to a reduction and is open when the magnet is switched off.

the bruises and only if there are extensive such contacts, possibly also

Construction. With the solution found, a normally closed and normally open contact is mixed, can

safe and complete suppression of bouncing in buckets of contactor use, you are

of the contact pieces. 65 then in the direction perpendicular to the plane of the drawing

The carrier is advantageously arranged one behind the other as bent by 180 ° and is made up of several Formed leaf spring, one leg of which is arranged on the switching part 17 parallel forks Housing is attached and the other leg actuates the.

As can be seen from the drawing, the leaf spring 35 extends from its attachment point Over a considerable distance to the movable contact piece 34 and also protrudes with its end 36 considerably beyond this. The elastic spring, which has a certain mass, forms a vibratory system that is constantly clamped at one end and after each other the contact pieces 34 and 29 is also clamped at the contact point. The kinetic energy the moving contact piece striking the fixed contact piece does not lead to a reflection of the moving contact piece on the fixed contact piece, since it is converted into vibration energy of the vibratable system will. The leaf spring vibrates with a vibration node on the movable contact piece and an antinode between the contact point and the firmly clamped end of the leaf spring. The end 36 of the leaf spring swings freely.

Patent protection is only sought for the entirety of the features of each claim, that is including its back relationship.

Claims (1)

Claims; I Force-fit actuated contact of an electromagnetic soundproofing, whose den Closing pressure of the contact generating spring is held fixed to the housing at one end and with its other end in the closing direction on one provided with the movable contact piece Carrier pushes, characterized in that the spring (38) on the steep on the carrier (35) to which the movable contact piece (34) is attached. 0 Contact according to claim 1, characterized in that the carrier (35) is designed as a leaf spring bent by 180 °, one leg of which is attached to the housing and the other leg of which carries the movable contact piece (34). 3 contact according to claim 1, characterized in that the spring (38) is a helical spring (38) is formed, whose / Ise in the direction of the closing movement of the movable contact piece runs through the point of contact of the contact pieces. 1 sheet of drawings