Interconnection device for an electric machine
View Patent ↗An interconnection device for an electric machine, in particular for an electric machine for a motor vehicle, is provided for interconnecting shaped-bar ends of a winding, in particular of a stator winding. The interconnection device has an interconnection element, which has one or more openings for the insertion of at least one shaped-bar end, wherein the one or more openings each have an insertion section and a contact-making section adjoining the insertion section, which sections are designed such that the at least one shaped-bar end can be inserted into the insertion section and, in the case of a relative movement between the opening and the inserted shaped-bar end, the inserted shaped-bar end reaches the contact-making section and the spacing between the at least one shaped-bar end and a contact is reduced by way of being guiding through the contact-making section.
1. An interconnection device for an electric machine for interconnecting shaped-bar ends of a winding, comprising:
an interconnection element comprising an opening for an insertion of at least two shaped-bar ends, wherein
the opening comprises an insertion section and a contact-making section adjoining the insertion section, which are configured such that the at least two shaped-bar ends are insertable into the insertion section and, in an event of a relative movement between the opening and the inserted shaped-bar ends, the inserted shaped-bar ends reach respective separate portions of the contact-making section, and a distance between the shaped-bar ends and respective contacts is reduced by way of guiding the shaped-bar ends through the contact-making section.
2. The interconnection device according to claim 1 , wherein
the interconnection device is for a motor vehicle electric machine, and
the shaped-bar ends are of a stator winding of the motor vehicle electric machine.
3. The interconnection device according to claim 1 , wherein
the contact-making section comprises a guide apparatus forming a guide, which is configured, in the event of a relative movement between the opening and the shaped-bar ends, to at least one of: (i) reduce the distance between the shaped-bar ends and the contact, and (ii) lead the shaped-bar ends onto the respective contacts.
4. The interconnection device according to claim 1 , wherein
the insertion section and the contact-making section adjoining the insertion section constitute an opening in the form of an elongated hole or a circular arc, and
an opening surface area of the hole or arc reduces from the insertion section through to the contact-making section.
5. The interconnection device according to claim 1 , wherein
the contact-making section comprises a stud section, which is oriented in a longitudinal direction or a circumferential direction to the insertion section, and is centrally arranged in the contact-making section, and
the stud section determines a distance between the two shaped-bar ends which are to be contact-connected in the contact-making section.
6. The interconnection device according to claim 1 , wherein
the interconnection element comprises a carrier plate and a contact-making plate,
the opening is configured in the carrier plate and a contact-making opening is configured in the contact-making plate, together with the contacts, and
the contact-making opening is configured in an overlapping arrangement in relation to the opening.
7. An electric machine, comprising:
a stator; and
an interconnection device according to claim 1 , wherein
the interconnection element of the interconnection device is fitted to at least one end of the stator, on the shaped-bar ends which project from the stator.
8. The electric machine according to claim 7 , wherein
the electric machine is a motor vehicle electric machine.
9. A vehicle comprising an electric machine according to claim 8 .
10. A method for assembling an interconnection device for an electric machine for interconnecting shaped-bar ends of a winding, wherein the interconnection device comprises an interconnection element comprising an opening for insertion of at least two shaped-bar ends, wherein the opening comprises an insertion section and a contact-making section adjoining the insertion section, which are configured such that the at least two shaped-bar ends are insertable into the insertion section of the opening and, in an event of a relative movement between the opening and the inserted shaped-bar ends, the inserted shaped-bar ends reach separate portions of the contact-making section, and a distance between the shaped-bar ends and respective contacts is reduced by way of guiding the shaped-bar ends through the contact-making section,
wherein the method comprises the steps of:
fitting the interconnection element to the shaped-bar ends which project from one end of a stator of the electric machine, such that the shaped-bar ends engage in the insertion section of the opening; and
moving the interconnection element relative to the shaped-bar ends, such that the shaped-bar ends reach the respective separate portions of contact-making section, and the distance between the shaped-bar ends and the respective contacts is reduced through the contact-making section.
11. The method according to claim 10 , wherein
the moving of the interconnection element relative to the shaped-bar ends is a rotational movement.
12. The method according to claim 10 , further comprising the step of:
connecting the shaped-bar ends to the respective contacts.
13. The method according to claim 12 , wherein
the connecting of the shaped-bar ends to the respective contacts is carried out by welding.