DD277567A1 - ARRANGEMENT FOR THE PRODUCTION OF ELECTRICAL CONNECTIONS IN A SMALL POWER ELECTRIC MOTOR - Google Patents

Abstract

The invention relates to an arrangement for the production of electrical connections in a small electric motor for domestic and commercial purposes. The invention relates specifically to automation-capable assembly solution in Kommutator motors by the automated joining of the stator in a Motorgehaeuse simultaneously connected to Kontaktstuetzpunkte winding ends of the Polringes are connected to the Kohlebuerstenfuehrungen as a releasable electrical switching connection. According to the invention, this object is achieved in that at two contact support points between the two ends of a resilient, provided with an inlet helical Tulpenfoermige contacting with arranged on the opposite Laengsseiten Umwoelbungen is arranged, and that a metallic Kohlebuerstenfuehrung provided with a contact lug for contact connection with the associated contact is, wherein the Buerstenfuehrungsisolation has a Einfuehrungsschraege. Fig. 1

Description

For this 3 pages drawings

Field of application of the invention

The invention relates to an automation-compatible mounting solution for commutator motors by the automatic connection of the stator in a motor housing at the same time connected to terminals winding ends of the pole ring are connected to the brush guides as a releasable switching connection.

Characteristic of the known technical solutions

In engine fan units solutions are known where an electrical contact connection to the brush guides is made by a spring contact element which is attached to the stator as a terminal when joining the stator to the motor housing.

The disadvantages of this solution are: a contact element consisting of spring material (eg spring bronze) is required, the electrical contact reached only by contact with this spring element with the brush guide is endangered by unavoidable vibrations of the motor and by surface corrosion; a relatively high material expenditure is necessary.

As further disadvantages of this solution are too nprinerv

The geometrically large-sized form of the contact element, which is a hindrance in the automatic production of the pole ring and during transport and the susceptibility of the electrical contact itself.

According to DE-OS 2155686 is known in blaktrowerkzeugen that formed when assembling the tool housing with the handle by electrical contact elements as stack contacts or blade contacts, a lösbaie electrical connection between the handle and tool housing is achieved, wherein the mating contact can also be attached to the stator of the motor , in this reference contact connections are described as power supply lines, which lead to a handle, which is given by means of screws as a detachable connection. Said prior art describes a solution in which the electrical connections of the pole ring or the housing are formed in the form of a plug, which establish the electrical contact during assembly of the handle.

Here, additional work and material expenses are necessary to create this detachable connection (principle application plug-socket). Although a repair-friendly solution was created, but does not give a sufficient effect for an automation-compatible production of stators and assembly of the motors. In the fortification process, no automation-compliant solution is feasible.

Object of the invention

The object of the invention bostoht is to provide an arrangement, dio oino simple and fast production of electrical Schaiiverbindung in a small electric motor, especially between stator and Kohlobürstenanordnung allows and ousordom a functionally reliable automation of the contacting process with reduced material and manufacturing complexity allows.

Explanation of the essence of the invention

It is the task of the invention. to produce an electrical connection of the Polringwicklung to the carbon brushes in universal motors without additional switching wires are necessary, the contact points (terminals) on the pole ring and the carbon brush guide are designed so that when automated joining of the stator in the motor housing, the same carrier carbon brush is, taking into account occurring manufacturing tolerances always a reliable electrical contact between Polringwicklung and carbon brush guide is achieved. According to the invention the object is achieved in that at two contact support points between the two ends of a resilient, provided with an inlet slope tulip-shaped Kontaktaufnahrne having on the opposite longitudinal sides bulges, is arranged, and that a metallic carbon brush guide provided with a contact lug for contact connection with the associated contact is, wherein the brush guide insulation has an insertion bevel.

According to the Kon'aktstützpunkte in the field of a contact blade flats and Anfosungen, which are provided with an associated tulip-shaped contact sleeve of a circuit board for network-side contact connection. According to the embodiment of the invention can be used for the preparation of the network-side contact connection optionally also known connectors.

It is particularly advantageous that the necessary for automated production of stators for universal motors contact bases (terminals) are designed so that the automatic joining of the stator in the motor housing, taking into account all tolerances always a functionally reliable electrical connection to the carbon brush guides is made , At the same time this constructive solution creates the prerequisite to automate the assembly process of the engine upgrade.

In addition, the network-side terminal contacts on the one hand designed so that when inserting the engine in the device, which also takes place in an automated assembly process, the electrical connection of the motor to a circuit board, the carrier of device switch, socket and radio interference is achieved or On the other hand, by a contact module, which is plugged onto the motor housing, the electrical connection of RFI picks up and secures the electrical connection to the device.

embodiment

The invention will be explained in more detail with reference to an embodiment with reference to the drawing. Show it:

Fig. 1: a SchniK representation of the electrical contact connection of the Polringwicklung / carbon brush guide and power supply of the device

Fig. 2: an overall view of the contact support (terminal) in sectional view, side view and top view Fig.3: dio carbon brush guide with contact lug in plan view along the line A-A Figure 4: the brush guide insulation with insertion slot and metallic carbon brush guide with contact lug.

In Fig. 1, the electrical interconnection between the contact support of the Polringwicklung and the carbon brush guide on the one hand and the electrical switching connection of the motor on the power side to the device on the other hand shown according to the invention.

According to the illustration, the carbon brush 1, which is received in a metallic carbon brush guide ") 2, which in turn is designed with a contact lug 2/1.

The brush guide insulation 3 is designed with an insertion slot J / 1 (Figure 4) to guide the contact tab 2/1 exactly.

In the area of the contact support point 4, the brush guide insulation 3 is provided with an insertion bevel 3/2.

The contact support 4 has in the region of the contact lug 2/1 a tulip-shaped contact 4/1, which in conjunction with a penetrated claw 4/2 a functionally reliable contact pressure between the contact lug 2/1 and the tulip-shaped contact 4 / Ί the contact support (terminals). 4 guaranteed.

The contact bases 4 are known to sit in Polringstirnisolation 5 in Domen 5/1 and 5/2 and take in hooks 4/3, the winding ends of the 0 Polringspulen on. With 7, the laminated stator core is designated. To ensure the device-side electrical connection of the motor, a contact sleeve 8 is further shown in FIG. 1, which is part of a prefabricated circuit board 9.

In Fig. 2, the views of the contact support point 4 are shown, wherein the complete functional reliability provided with bevels tulip-shaped contact 4/1, the issued claw 4/2, the hook 4/3 for receiving the winding end .5, the fastening claw 4/4 for attachment of the contact base (terminals) 4 in the Polringstirnisolation 5 and the attached in all levels flats and chamfers of the contact blade 4/5 visible

In order to ensure the insertion of the Kontaktfahno 2/1 of the carbon brush guide 2 in the tulpenförinige contacting 4/1 of Kontaktstützpunktes 4 in the automated assembly process tolerance, are provided in the upper part of the contact blade 4/5 flats and the brush guide insulation 3 with an insertion bevel 3/2 ,

Boi exactor Positioniurung dor contact lug 2/1 through an insertion slot 3/1 (Figure 4) in the brush guide insulation 3 is a functionally reliable olüktrischer contact between contact lug 2/1 of the carbon brush guide 2 and the tulponförmigen Kontaktaufnahmu 4/1 dos contact support 4 guaranteed.

The fodorolestische electrical Schalivorbindung is supported by the vorgosehenon on the long sides 11 of the tulip-shaped Kontaktaufnahme 4/1 bulge 10th

In Fig. 3, the metallic Kohlebürstonführung 2 is shown with notched contact lug 2/1 for further discussion.

In Figure 4 is as a front view dio inserted metallic Kohlebüistenfüluung 2 mi? Contact banner 2/1 visible in the brush guide isolaiion 3 with insertion slot 3/1.

Claims (3)

1. Arrangement for the production of electrical connections in a small power electric motor, in particular in housing construction, the housing has a stator with stator windings and a number of these each connected terminals, with a rotor which is provided with a commutator, is rotatably mounted relative to the stator , characterized in that at two contact support points (4) between the two ends of a resilient, provided with an inlet slope tulip-shaped contact receptacle (4/1) with on the opposite longitudinal sides (11) having bulges (10) is arranged, and that a metallic Carbon brush guide (2) with a contact lug (2/1) to the contact connection mt the associated contact receptacle (4/1) is provided, wherein the brush guide insulation (3) has an insertion bevel (3/2). 2. Arrangement for the production of electrical connections in an electric motor, according to claim 1, characterized in that the contact support points (4) in the region of a contact blade (4/5) have flats and chamfers, with an associated tulip-shaped contact sleeve (8) of a printed circuit board (9) are provided for network-side contact connection. 3. Arrangement for producing electrical connections in an electric motor, according to claim 1 and 2, characterized in that for the production of the network-side contact connection optionally also plug connectors can be used.