DE102005005954A1 - Electrical high power contact, for use in electrical machine, has contact bush retaining contact pin, where bush includes discoidal area at end and extends in centrical axial path from discoidal area - Google Patents

Abstract

Electrical high power contact has a contact bush (13) for retaining a contact pin (11). The bush includes a discoidal area (19) at an end, where the bush extends in centrical axial path from the area. A radial ring fold is between the bush and the area. The bush and the area are formed as a single piece. A retainer having an inner diameter of the bush is in the bush, where the inner diameter is smaller than diameter of the pin. An independent claim is also included for an electrical machine including the above electrical high power contact.

Description

The Invention is based on a high current electrical contact and a Electric machine according to the preambles of patent claim 1 and claim 10.

It are already pluggable connections for a high current electrical contact been proposed, in which the contact partners non-destructive are separable. The problem here is due to unavoidable Tolerances or tolerance pairs the lack of security of such Connection before an unwanted release.

at Other types of electrical high current contacts are connections provided only by destruction are separable. Known types of connection of such high current contacts are cohesive Connections such as welding, soldering, electroconductive bonding and the like, but with undesirable ones Side effects due to welding heat, solder drops and soldering sparks may occur, the worst case of short circuits and leakage current lead. If sensitive electronic interconnections are in the immediate vicinity of welding and soldering zones, Such types of connec tion are unsuitable. Alternatively, these are positive Compounds, such as e.g. Rivets, torxes and the like, and non-positive connections known, wherein, for example, by clamping screwing, pressing or Shrink fit, insulation displacement and press-in or penetration with cutting edges made a connection between the contact socket and contact pin becomes. It can however, difficult-to-define deformations on sensitive neighboring ones Components occur.

Advantages of invention

One electrical according to the invention High current contact comprises a contact socket for receiving a contact pin on, at its one end a substantially disc-shaped area has, from which the contact bush extends centrally axially away. Preferably, the disc-shaped Region and the contact socket integrally formed, in particular produced by cold forming. In particular, the simple one is Construction of the high-current contact and its ease of installation advantageous. The disc shape with the centrally located contact socket allows about that According to the invention a Compensation of a relatively large Axial and angular offset of contact socket and contact pin. Of the High current contact is especially for electrical machines suitable for electrically contacting their coils, their connecting wires usually are relatively rigid. The axial offset can be of an order of magnitude from about 1 to 3 mm, and the angular misalignment from about up to 20 ° for three three-phase phases and for neutral point connections, the themselves are rigid in themselves.

Prefers is at the transition from the disk-shaped Area towards the contact socket out at least one radial annular fold provided, with which conveniently an additional one Compensation of the axial and angular offset can be made. This increases the flexibility of the high current contact. The contact socket can when inserting the Contact pin perform tilting. It is of particular advantage that no deformations the sensitive, neighboring components of the contact partners occur, that too unwanted, difficult-to-determine side effects can lead. In particular, by the high-current contact according to the invention the occurrence of short circuits or be avoided by creepage, for example, by the aforementioned known connection types can occur. The high-current contact according to the invention is also for use in particularly critical areas, for example close of sensitive components, suitable.

In the contact socket is arranged a receiving device which the Contact socket reduced in its inside diameter. So that can made a particularly intimate contact with an inserted contact pin become. The inner diameter of the contact socket is smaller than one Diameter of the contact pin, so that in the inserted state enclosed interference fit is formed and thereby a contact resistance between contact pin and contact socket is advantageously reduced.

The Receiving device may preferably by a self-invaginated wall be formed of the contact socket. Advantageously, the recording device one piece be with the contact socket. Denk bar is also a separate recording device, the suitably inserted into the contact socket and connected to this is.

Of the discoid Area, the contact socket and the receiving device are preferably in one piece or in one piece can be integrated in a stamped grid and can e.g. produced by forming techniques become.

The receiving device preferably has a height of preferably at least one third of the axial longitudinal extension of the contact socket in order to produce a particularly favorable compensation of coaxial and angular misalignment. In addition, so that a sufficiently large Kontaktflä provided by the contact partners. Preferably, the contact socket and the contact pin of the high-current contact according to the invention are resilient and permanently clamped after cold forming. Because of the low contact resistances, they can have sufficiently large contact surfaces that allow good definability. Thus, a considerably cheaper configured contact surface for a power transmission or power line is provided as in the segment-like contact surfaces of the high-current contacts, which are formed with known Einpresstechniken with predominant edge clamps.

It can also be provided that the receiving device of the contact socket widened funnel-shaped in the opposite direction of the contact pin, which makes the insertion of the contact pin particularly easier. at an axial displacement of the contact pin relative to the contact socket can the contact pin through the funnel into the correct insertion position guided become. Furthermore leave this From management a cheap one against support during plugging despite a high flexibility of the connection too. At this embodiment For example, the receiving device can preferably be configured as a two-zone be with a first sub-zone, which is a wall invaginated in itself and a second sub-zone or insertion zone, which expanded in the opposite direction of contact of the contact pin funnel-shaped. In this embodiment be the cheap ones Properties, namely the advantageous compensation for the coaxial and angular offset of the contact partners and the good insertability combined of the pen. Conveniently, is a pen end inserted into the receptacle of the contact socket of the contact pin so designed so that the pin end can be used simultaneously as a pulling tool is. The pin end may have a surface finish, in which a particularly easy pull through when plugging is possible.

When preferred material for the high-current contact according to the invention can pure copper or a low alloyed copper medium electric conductivity and medium thermal conductivity be used for that a cheap one Stress relaxation behavior average strength values, but still one has sufficient clamping force or elastic tension. Especially suitable for this is a designated K65 material of the company Wieland, Ulm. Good solidification can be achieved with this material a finely dispersed iron excretion in the structure can be achieved. When using this Material is the pen particularly good drawable.

Farther An electric machine is proposed with at least one electrical high-current contact is provided, the contact socket at one end has a substantially scheibenför shaped area of the center of the contact bush extends axially away.

advantageously, is a contact zone of the high-current contact according to the invention airtight or nearly airtight, so that conveniently a good electric and thermal conductivity is achieved. This is especially given by the interference fit. The high current contact is thus characterized by a particularly high Lifespan and has overall long-term quality.

drawing

Further Embodiments, Aspects and advantages of the invention are also independent of their summary in claims, without restriction the general public from below in a drawing illustrated embodiments the invention.

in the Show:

1 a transparent embodiment of the high-current contact according to the invention;

2 a half-sectional view after 1 ;

3 a perspective view of the embodiment according to 1 in half section;

4 an alternative embodiment of the invention; and

5 a representation after 4 in half section

description the embodiments

1 shows a transparent embodiment of the high-current contact according to the invention, 2 a semi-transparent half-cut representation after 1 and 3 a perspective view of the embodiment according to 1 in half section. Identical elements are designated in the figures with the same reference numbers.

The electrical high-current contact according to the invention 10 has a substantially disc-shaped area 19 with a centrally located, axially extending contact socket 13 on. In the contact socket 13 is a contact pin 11 introduced, for example, a lead wire of a coil of an elek machine. The contact socket 13 is essentially formed as a hollow cylinder and has at a for insertion of the contact pin 11 provided free end opposite end a transition to the disk-shaped area 19 on. At the transition between the contact socket 13 is at least one radial annular fold 14 formed with which a coaxial and / or angular offset of the contact pin 11 can be compensated. The contact socket 13 has at its free end a receiving device 12 for receiving the contact pin 11 on.

As additional compensation function of the axial and / or angular offset, the receiving device 12 the contact socket 13 a height 15 of at least one third of the axial length 16 the contact socket 13 on. This also provides a sufficiently large contact surface of the contact pin 11 and contact socket 13 or recording device 13 provided that ensure a favorable power transmission and power line.

The cradle 12 the contact socket 13 is in the 1 to 3 as an inverted wall 17 for receiving the pen 11 formed, which can be prepared for example by cold forming. The contact socket 13 is with the cradle 12 integrally formed in this preferred embodiment. One in the cradle 12 the contact socket 13 introduced end of the pen 21 of the contact pin 11 is so designed that the end of the pencil 21 can be used as a pulling tool. The end of the pencil 21 may have a surface finish, in which a particularly easy pulling through the pin end 21 when plugging is possible. It can also be provided that the end of a pen 21 opposite second pin end 22 is configured accordingly to establish a connection with another contact partner.

4 shows an alternative embodiment of the electrical high-current contact according to the invention 10 , and 5 a transparent representation after 4 in half section.

The structure of the alternative embodiment substantially corresponds to that in the 1 to 4 shown first embodiment of the high current contact 10 with a contact bush extending in the axial direction 11 with a recording device 12 for receiving a contact pin 11 , The contact pin 11 has essentially the same dimensions to the contact socket 13 on like in the 1 to 4 , To compensate for a coaxial and / or angular offset of the contact pin 11 opposite the high current contact 10 is at the transition between contact socket 13 and disc-shaped area 19 a radial annular fold 14 educated. The on-take device 12 the contact socket 13 has one in mating direction 18 of the inserted contact pin 11 funnel-shaped extension 23 on which is an insertion of the contact pin 11 in the contact socket 13 facilitated.

Claims (10)

Electrical high-current contact with a contact socket ( 13 ) for receiving a contact pin ( 11 ), characterized in that the contact socket ( 13 ) at one end a substantially disc-shaped area ( 19 ), from which the contact socket ( 13 ) extends axially away axially. Electrical high current contact according to claim 1, characterized in that between the contact socket ( 13 ) and the disc-shaped area ( 19 ) at least one radial annular fold ( 14 ) is arranged. Electrical high current contact according to claim 1 or 2, characterized in that the contact socket ( 13 ) and the disc-shaped area are integral. Electrical high-current contact according to one of the preceding claims, characterized in that a receiving device ( 12 ) in the contact socket ( 13 ) is arranged, which has an inner diameter of the contact socket ( 13 ) which is smaller than a diameter of the contact pin ( 11 ). Electrical high current contact according to claim 4, characterized in that the receiving device ( 12 ) of the contact socket ( 13 ) by a self-inverted wall ( 17 ) of the contact socket ( 13 ) is formed. Electrical high current contact according to one of claims 4 or 5, characterized in that the receiving device ( 12 ) of the contact socket ( 13 ) a height ( 15 ) of at least one third of the axial longitudinal extent ( 16 ) of the contact socket ( 13 ) having. Electrical high current contact according to one of claims 4 to 6, characterized in that the contact socket ( 13 ), the receiving device ( 12 ) and the disc-shaped area ( 19 ) are integral. Electrical high-current contact according to one of the preceding claims, characterized in that the contact socket ( 13 ) widened funnel-shaped at its free end. Electrical high current contact according to one of the preceding claims, characterized gekenn records that the disk-shaped area ( 19 ) and the contact socket ( 13 ) are formed of low alloyed copper. Electrical machine having means for making electrical contact, characterized in that at least one high-current electrical contact ( 10 ) is provided, the contact socket ( 13 ) at one end a substantially disc-shaped area ( 19 ), from which the contact socket ( 13 ) extends axially in the insertion direction away.