CN112514211A

CN112514211A - Brush holder housing for a motor vehicle alternator

Info

Publication number: CN112514211A
Application number: CN201980051619.6A
Authority: CN
Inventors: L.勒杜; H.C.斯梅格; H.特姆佩兹
Original assignee: Valeo Equipements Electriques Moteur SAS
Current assignee: Valeo Equipements Electriques Moteur SAS
Priority date: 2018-08-02
Filing date: 2019-07-30
Publication date: 2021-03-16
Also published as: BR112021000493A2; FR3084795A1; WO2020025624A1; FR3084795B1; MX2021001261A

Abstract

The invention relates to a brush-holder housing (200) for a vehicle, comprising an accommodation portion (201) for accommodating an electronic component (202), the accommodation portion (201) comprising: a first housing element (203) for housing a main body (202a) of the electronic component, the first housing element (203) having a width determined such that a wall of the first housing element (203) is spaced apart from the main body (202a) of the electronic component when the electronic component (202) is inserted into the housing (201); a second housing element (204) for positioning a tab (202b) of the electronic component (202); and a small wall (205) separating the first housing element (203) and the second housing element (204), the small wall (205) comprising two recesses (206) for housing tabs (202b) of the electronic component (200).

Description

Brush holder housing for a motor vehicle alternator

Technical Field

The present invention relates to a brush-holder housing for an alternator of a motor vehicle. And to an alternator provided with the brush-holder housing.

Background

Modern alternators for motor vehicles consist of compact equipment in which control and regulation devices are incorporated.

The brush-holder associated with the collector of the rotor most often supports means for regulating the voltage generated by the alternator, constituting a brush-holder regulator assembly connected to the wiring harness of the vehicle by means of terminals or connectors.

A brush-holder regulator of this type is described, for example, in patent application FR2969411 by the company VALEO EQUIPEMENTS ELECTRIQUES MOTEUR. Brush-holder regulators of this type according to the prior art comprise an electronic circuit in the form of an electronic chip containing an ASIC.

Fig. 1 of the present patent application shows another type of brush-holder regulator 1 according to the prior art, which includes an electronic chip 10.

In a known manner, the brush-holder regulator is made by overmolding an electrical trace circuit 11 (known as a lead frame) with a plastic material, to which electrical components are added by adhesion and soldering.

The trace circuit 11 is formed by stamping a soft iron strip. The actual overmolding of the trace circuitry 11 is preceded by a step of pre-overmolding. This pre-overmolding step ensures that the traces are partially overmolded in order to maintain the arrangement of the traces with respect to each other after cutting the metallic mechanical connection between the traces, which is produced by stamping and needs to be removed in order to form an electrical connection circuit.

The final overmolding operation makes it possible to form a housing of the brush-holder regulator, which, in addition to the track circuit 11, comprises: two

receptacles

12a, 12b for conducting brushes (not shown), these two

receptacles

12a, 12b being designed to ensure electrical contact with the collector (not shown) of the alternator;

receptacles

13, 14 and 15 for electronic components; and electrical and

mechanical connection terminals

16a, 16b and 16 c.

The electrical and

mechanical connection terminals

16a, 16b and 16c are electrically connected to the trace circuit 11 and allow the brush-holder regulator to be mechanically mounted on the rear bearing of the alternator and electrically connect the brush-holder to the supply network of the vehicle.

The electrically conductive brushes may establish an electrical connection with a field winding of a rotor of the alternator.

The electronic component includes: an ASIC chip 10 glued and electrically connected by wires 101 soldered (known as wire bonding technology) to the trace circuit 11; and

discrete components

17, 18 formed by capacitors. Finally, the receptacle containing the electronic component is closed with a sealing material to ensure a hermetic covering and mechanical protection of the component.

To manufacture this type of brush-holder housing, the electronic components must be properly positioned to ensure that they are soldered to the traces of the housing. This positioning is a delicate step, which leads to a lot of production costs.

Disclosure of Invention

The object of the present invention is to eliminate at least the above-mentioned disadvantages. One aspect of the present invention relates to a brush-holder housing for a vehicle, including an accommodating portion for accommodating an electronic component, the accommodating portion including:

a first receptacle for receiving a body of an electronic component, the first receptacle having a width determined such that when the electronic component is inserted into the receptacle, a wall of the first receptacle is spaced apart from the body of the component;

a second receptacle for positioning a tab of an electronic component; and

a small wall separating the first receptacle and the second receptacle, the small wall comprising two grooves for receiving tabs of an electronic component.

Thus, the width of the first receptacle is designed to accommodate multiple types of electronic components, as well as multiple sizes of components. The intentionally large width is determined so that the body of the electronic component is not guided by the wall when the electronic component is inserted into the accommodating portion. Thus facilitating the positioning of the electronic component.

According to a non-limiting aspect of the invention, the determined width of the first receptacle is at least equal to 1.2 times the width of the electronic component to be housed.

According to a non-limiting aspect of the invention, the wall of the second receptacle facing the small wall is provided with two grooves for receiving the ends of the tabs of the electronic component. These two additional grooves make it possible to retain the ends of the tabs of the electronic component and to form a second guide, the first guide being ensured by the groove passing through the small wall. This second guide ensures the correct positioning of the tabs of the component when the electrical welding is performed on the tracks. In addition, these second grooves make it possible to prevent solder disconnection of the tabs of the electronic components during vibration of the housing.

According to a non-limiting aspect of the present invention, the sidewalls of the groove form an angle of less than 180 °. Therefore, in the process of positioning the electronic component in the housing, the positioning of the tab of the electronic component is facilitated.

According to a non-limiting aspect of the invention, the wall of one of the walls of the small wall forming the first receptacle has a protruding portion for positioning the body of the electronic component. The protruding portion makes it possible to correctly position the body of the component in the first cavity.

According to a non-limiting aspect of the invention, the base of the first receptacle has a concave portion configured and designed to receive the body of the electronic component.

According to a non-limiting aspect of the present invention, an electronic component formed of a capacitor is placed in the accommodating portion.

Another non-limiting object of the invention relates to an alternator provided with a brush-holder housing for a vehicle according to the different aforementioned aspects of the invention.

Drawings

FIG. 1 illustrates a brush-holder housing for a vehicle alternator according to the prior art.

FIG. 2 illustrates a non-limiting embodiment of a brush-holder housing for an automotive vehicle alternator in accordance with an aspect of the present invention.

FIG. 3 illustrates another non-limiting embodiment of a brush-holder housing for an automotive vehicle alternator in accordance with an aspect of the present invention.

FIG. 4 illustrates another non-limiting embodiment of a brush-holder housing for an automotive vehicle alternator in accordance with an aspect of the present invention.

FIG. 5 illustrates another non-limiting embodiment of a brush-holder housing for an automotive vehicle alternator in accordance with an aspect of the present invention.

FIG. 6 illustrates another non-limiting embodiment of a brush-holder housing for an automotive vehicle alternator in accordance with an aspect of the present invention.

Detailed Description

FIG. 1 has been used to illustrate an embodiment of a brush-holder housing for an automotive vehicle alternator, according to the prior art.

FIG. 2 illustrates a non-limiting embodiment of a brush-holder housing 200 for an alternator of a motor vehicle.

The housing 200 includes an accommodation portion 201 for accommodating an electronic component 202. In the example shown, the electronic component 202 is formed by a ceramic type capacitor.

In this embodiment, the housing 201 has a first receptacle 203 for housing a main body 202a of the electronic component 100, and a second receptacle 204 for positioning a tab 202b of the electronic component.

Receptacle 201 also includes a small wall 205 separating first receptacle 203 from second receptacle 204, small wall 205 including two grooves 206 for receiving tabs 202b of electronic components. It should be noted that first receptacle 203 has a width determined such that when electronic assembly 202 is inserted into receptacle 201, the walls of first receptacle 203 are spaced from the body 202a of the component. In other words, there is a gap between the wall of first receptacle 203 and the body of member 202 a. The gap is at least XXXXX mm. Therefore, when the component 202 is inserted into the accommodating portion 201, such insertion becomes easy because a sufficient space is left between the main body 202a of the component and the wall of the first receptacle 203.

FIG. 3 illustrates another non-limiting embodiment of a brush-holder housing 200 for an automotive alternator.

In this embodiment, the wall of the second receptacle 204 facing the small wall 205 is provided with two grooves 207 for receiving the ends of the tabs 202b of the electronic components. These complementary grooves 207 make it possible to correctly position the ends of the tabs 202b of the parts and ensure their good positioning. Thus, welding 208 of the tab 202b of the component to a trace (not shown) of the brush-holder housing 200 is facilitated.

According to the embodiment shown in fig. 4, the walls of the groove 206 of the small wall 205 form an angle θ smaller than 180 °. These particular features make it possible to guide the tab 202b during the positioning of the component 200 in the housing 201.

According to another embodiment, shown in fig. 5, a wall 209 of small wall 205 forming one of the walls of first receptacle 203 has a projection 210, projection 210 being formed in this example by a boss for positioning main body 202a of electronic component 202.

The boss 210 makes it possible to guide the main body 202a of the electronic component in the process of positioning it in the accommodating portion 201.

Further, as shown in FIG. 6, base 211 of first receptacle 203 may include a recessed portion 212 to receive body 202a of an electronic component. The recess 212 allows for good positioning of the body 202 a.

As shown in fig. 5, the electronic component 202 may be formed from a ceramic capacitor having so-called "radial" connection tabs.

As shown in fig. 6, the electronic component 202 may be formed by a ceramic capacitor having so-called "through" connection tabs.

Generally, the housing 201 may also house other types of electronic components, such as TVS (transient voltage suppression) type electronic components.

In other words, the brush-holder housing 200 according to the present invention has a common accommodating portion 201, and the common accommodating portion 201 makes it possible to accommodate a plurality of types of electronic components 202 whose designs are different. In addition, it facilitates soldering of the tabs 202b of the electronic component 202 to the traces of the brush-holder housing 200.

Claims

1. A brush-holder housing (200) for a vehicle, comprising an accommodation portion (201) for accommodating an electronic component (202), the accommodation portion (201) comprising:

a first receptacle (203) for receiving the body (202a) of the electronic component, the first receptacle (203) having a width determined such that when an electronic component (202) is inserted into the receptacle (201), a wall of the first receptacle (203) is spaced apart from the body (202a) of the electronic component;

a second receptacle (204) for positioning a tab (202b) of the electronic component (202); and

a small wall (205) separating the first receptacle (203) and the second receptacle (204), the small wall (205) comprising two grooves (206) for receiving tabs (202b) of the electronic component (200).

2. The brush-holder housing (200) according to claim 1, wherein the determined width of the first receptacle (203) is at least equal to 1.2 times the width of the body (202a) of the electronic component (202) received.

3. The brush-holder housing (200) according to any of the preceding claims, characterized in that the wall of the second receptacle (204) facing the small wall (205) is provided with two grooves (207) for receiving the ends of the tabs (202b) of the electronic component.

4. The brush-holder housing (200) according to any of the preceding claims, characterized in that the walls of the groove (206) form an angle θ of less than 180 °.

5. The brush-holder housing (200) according to any of the preceding claims, characterized in that a wall (209) of the small wall (205) forming one of the walls of the first receptacle (203) has a protruding portion (210) for positioning a main body (202a) of the electronic component.

6. The brush-holder housing (200) according to any of the preceding claims, characterized in that the base (211) of the first receptacle (203) has a concave portion (212) configured and designed to house the body (202a) of the electronic component.

7. The brush-holder housing (200) according to any one of the preceding claims, characterized in that an electronic component (202) formed by a capacitor is placed in the accommodation (201).

8. An alternator provided with a brush-holder housing (200) according to any one of the preceding claims for a vehicle.