JPH0142454B2 - - Google Patents

Description

[Detailed description of the invention] The present invention has an excitation winding and a contact angle,
The lower end of this contact angle is fixed on the support plate and has an electrical terminal, the upper end of the contact angle bent at right angle supports one fixed contact, which is movable. The present invention relates to a switch, such as an electromagnetic switch, adapted to cooperate with amateur switch contacts. Switches configured as such electromagnetic relays are known. Thereby, adjustment of the contact spacing is made by re-bending the bent upper end with fixed contacts. In the case of such a contact adjustment, the contact angle is primarily constructed elastically, so that it is necessary to determine the dimensions after the bending process. This method is therefore expensive and cannot be automated. These bending readjustments to the contact angle may require multiple iterations to place the contacts in the desired position. Additionally, this method makes it easier for the contacts to be adjusted to tilted positions that cause excessive contact burnout.

In contrast, the switch of the present invention has the following advantages. That is, by elongating the contact angle, the elastic spring action of the fixed switch contact can be completely eliminated. The adjustment of the fixed switch contacts or the predetermined contact spacing is thereby completely automated and is therefore considerably simplified.

The concept of the invention can generally be used in electric switches, for example manually or hydraulically or pneumatically actuated switches. In such switches, the problem arises of automatically adjusting the contact spacing as simply and quickly as possible.

In order to extend the contact angle by a predetermined small amount at the cut, it is advantageous to provide a plurality of small cuts adjacent to each other. According to the invention, the cut in the contact angle is provided during the adjustment process of the fixed contact, in which case, after assembly of the relay, a cradle is inserted into one side of the contact angle, and a molding with a blade molding on the other side is carried out. A notch is formed in the contact angle by the ram.

Next, the present invention will be explained in detail using illustrated embodiments.

For example, a power relay 10 for switching the ignition glow plug of a diesel engine is shown in the figure. A yoke 1 is placed on the support plate 11 of the relay 10.
2 is fixed, and this yoke has an excitation winding 14. It supports an iron core 13 indicated by a broken line. Yoke 1
An armature 15 is pivotably fixed to the upper end of 2, which armature supports a leaf spring 16 having a first switch contact. The armature 15 is separated from the core 13 by the tension spring 18 in its rest position. A fixed switch contact 19 cooperating with the first switch contact 17 is provided at the right-angled upper end 20a of a contact angle 20, which is connected to its lower bent end 20a.
0b is fixed on the support plate 11 and has an electrical terminal 21.

In order to adjust the fixed switch contact 19 to the desired position, a plurality of notches 22 are provided adjacent to the portion 20c of the contact angle 20 below the right-angled upper end 20a; extends laterally across the width of the contact angle 20. These cuts 22 are formed by forming rams 23, resulting in an elongation of the portion 20c of the contact angle 20. The forming ram 23 has two adjacent blades 24 at its front which are pressed into parts of the contact angle 20 when the forming ram is fed in the direction of the arrow 25. Contact angle 20
A fixed pedestal portion 26 is inserted on the side opposite to the notch 22, and this pedestal portion receives pressure from the forming ram 23. The forming ram 23 is operated together with a forming device 27, which is shown schematically.

The automatic adjustment of the fixed switch contacts 19 and the switch contacts 17 in the armature 15 can be carried out after the power relay 10 has been assembled and after the power relay has been accommodated in the housing device. A side measuring gauge 28 having a predetermined thickness is inserted into a narrow space between the armature 15 and the iron core 13. Two switch contacts 17 and 19 are connected via the terminal 21 and the terminal 29 of the yoke 12.
is connected to a current circuit 30, into which the molding device 27 is also connected. amateur 15
is pressed by a force acting on the iron core 13 in the direction of the arrow 31. As a result, Amachiyua 15 and Tetsushin 13
The sizing gauge between the two is fixedly clamped.
In the simplest case, the armature 15 is magnetically attracted by applying a voltage to the excitation winding 14. The armature switch contact 17 thereby reaches a predetermined position in which the switch contact is not yet in contact with the fixed switch contact 19. Current circuit 30 is therefore not yet closed. Molded ram 2
3, the first two notches 22 are the contact angle 2
Formed to 0. Due to the resulting elongation of the contact angle 20 of its part 20c, the switch contact 19 is lifted by a fixed distance of, for example, 0.2 mm.

At this time, if the switch contact 19 is not yet in contact with the switch contact 17 of the armature 15 opposite to it, the power relay 10
Can be lifted by double the distance. In a subsequent step, the forming ram 23 is moved again in the direction of the arrow 25, the blade 24 making two further cuts 22 in the contact angle 20. During the formation process,
When the switch contact 19 contacts the opposite switch contact 17, the current circuit 30 is closed. The switch contact 19 reaches the predetermined position and, simultaneously with the closing of the current circuit, the stepwise activated forming ram is stopped via the forming device 27. The measuring gauge 28 and the pedestal 26 can be removed and the adjusted power relay can be removed from the storage device again.

The invention is not limited to the illustrated embodiment. This is because the switch contacts of other switches can be similarly adjusted by extension of the contact support. It is important here that the cut is located in a part of the contact support parallel to the axis of the switch contact, so that the extension of the contact support caused by the cut raises the switch contact. It is also possible to mount only the blades on the front side of the forming ram 23. In this case, a plurality of incisions are formed by the forming ram 23 side by side on the contact angle. The depth of penetration is then limited by the height of the cutting edge of the forming ram. For this depth of cut,
By closing the current circuit, the blade of the forming ram is no longer pressed into the contact angle at all. As a result, the penetration depth is smaller than the height of the blade of the forming ram.

If the switch contact point is to be adjusted only during the forming process, the forming ram may be provided with a plurality of blades of varying heights. With such forming rams, the contact carrier is continuously stretched during the formation of the incision. As soon as the current circuit is closed, the molding process ends and the switch contacts are set to their set values.

According to the invention, power relays with front contacts are also adjusted. After adjustment of the main contact, the front contact faces the main contact by means of a notch in its contact angle, so that the front contact contacts the main contact by a predetermined distance when the relay is closed. Lifted enough to connect. Similarly, the stop for the armature can be adjusted, which stop defines the contact spacing when the relay opens.

[Brief explanation of drawings]

The figure is an enlarged side view of a power relay used to explain the switch according to the present invention. 19... Fixed switch contact, 20... Contact angle, 23... Molded ram, 24... Blade.

Claims (1)

[Claims] 1. It has an excitation winding and a contact angle, the lower end of the contact angle is fixed on a support plate,
and an electrical terminal, the right-angled upper end of the contact angle supporting a fixed contact, said contact cooperating with a switch contact of a movable armature, Part 20c of the contact angle 20 below the upper end 20a bent at right angles for fixed contact adjustment
The forming ram 2 is provided with at least one incision 22 for elongation of this portion 20c at the desired location of the forming ram 2.
A switch characterized by being equipped with 3. 2. A switch according to claim 1, wherein the notch 22 extends laterally across the width of the contact angle 20. 3. The switch according to claim 2, wherein a plurality of notches 22 are provided adjacently.