Structural assembly for an electrically powered device

Abstract

The invention relates to a structural assembly of an electric device, comprising a housing part, a printed circuit board, an electric circuit, a cover which together with the housing part forms an electronics chamber in which the electric circuit is arranged, a press-in contact having a press-in section, a fastening section and a contact section, the press-in contact having a first press-in contact whose press-in section is pressed in from a first side into the printed circuit board, whose fastening section is fastened in a wall of the housing part, whose contact section projects into the housing part, and a second press-in contact whose press-in section is pressed in from a second side into the printed circuit board, whose fastening section is fastened in the cover, whose contact section projects from the cover, a region of the printed circuit board and the housing part defining a space from which an end of the press-in section of the second press-in contact projects, the end of the press-in section of the second press-in contact projecting from the printed circuit board on a first side of the printed circuit board into the space, the space having an outward opening.

Description

Technical Field

[0001] This invention relates to a structural component of an electric device, the structural component having:

[0002] Housing components;

[0003] A printed circuit board, said printed circuit board being disposed on the outside of the housing component;

[0004] Circuit, the circuit being arranged on a printed circuit board; and

[0005] The cover, together with the housing, forms an electronic chamber in which circuitry is arranged;

[0006] The structural component has a press-in contact with a press-in section that is press-in into and thus secured to the printed circuit board and connected to the circuit. The press-in contact has a securing section and a contact section, through which the circuit can be electrically connected from an external contact.

[0007] The press-in contact has at least one first press-in contact, a press-in section of the first press-in contact being press-in into the printed circuit board from a first side, a fastening section of the first press-in contact being fastened to the wall of the housing, and a contact section of the first press-in contact extending into the housing.

[0008] The press-in contact has at least one second press-in contact, a press-in section of the second press-in contact being press-in into the printed circuit board from a second side, a fastening section of the second press-in contact being fastened in a cover, and a contact section of the second press-in contact extending out from the cover. Background Technology

[0009] Electrical devices with such structural components can be, for example, pumps known in documents DE102011055599A1 and DE102018125031A1. These pumps have an electric motor as a drive, which has a stator and a rotor. The pump also includes a multi-piece housing having a pump chamber, a motor chamber, and an electronics chamber. An impeller is arranged in the pump chamber and is driven by a motor arranged in the motor chamber. Circuitry is provided in the electronics chamber, which allows the motor to be controlled and / or regulated. The impeller and the motor rotor are interconnected by a shaft. The shaft is guided through the wall of the housing, through which the pump chamber and the motor chamber are separated from each other.

[0010] The stator is housed within the housing of the structural assembly, which encloses the motor compartment where the rotor is located. The electronics compartment, consisting of the cover and housing of the structural assembly, houses the circuitry configured as the motor's control unit.

[0011] In the structural components of this pump, as described at the beginning, first press-in contacts can be provided, which will serve as connections between the circuitry and stator of the motor's control section. For this purpose, these first press-in contacts are guided through the wall of the housing and secured, with the stator arranged within the housing. When mounting a printed circuit board on which the circuitry is arranged, the press-in sections of the first press-in contacts are manufactured into holes provided for this purpose in the printed circuit board, thereby establishing a mechanical connection between the printed circuit board and the housing and an electrical connection between the circuitry and the motor.

[0012] A second press-in contact is securely fastened to the cover, wherein a press-in section of the second press-in contact extends from the cover. If the cover is now mounted on the housing, the press-in section of the second press-in contact is introduced into an additional hole provided for this purpose. Because the electronics chamber forms a closed chamber after the cover is installed, it is not easy to verify after installation whether the press-in section of the second press-in contact has been introduced into the additional hole provided for this purpose. Testing the pump's electrical function does not provide knowledge here, as an electrical connection can be established between the circuit and the second press-in contact without establishing a mechanical connection. X-rays could be used to determine this, but X-rays are very expensive. Summary of the Invention

[0013] This invention is based on this.

[0014] The technical problem of the present invention is to simply inspect the connection, especially the mechanical connection, between the second press-in contact and the printed circuit board.

[0015] This technical problem can be solved by means of the present invention in the following manner:

[0016] The printed circuit board and housing define a space from which the end of a press-in section of at least one second press-in contact extends. This space is not connected to the electronics chamber, and the end of the press-in section of at least one second press-in contact extending from the printed circuit board on its first side extends into this space. The space has an outward opening that can be used to inspect the connection between the second press-in contact and the printed circuit board. This opening can also be used for visual inspection by means of a camera. A connection may exist between this space and the electronics chamber. If so, dirt or moisture can enter the electronics chamber through the opening. It is possible that the opening is closed using a plug, other components, such as an additional cap, or a sealing solution provided on the housing or cap, or filled with a casting material or the like, thereby also protecting the second press-in contact from environmental influences. It is also possible that there is no connection between the space and the electronics chamber.

[0017] According to the invention, the opening may, at least before it is closed, allow visibility of the end of the press-in section of at least one second press-in contact extending from the printed circuit board on its first side. This means that there is a line of sight between the opening and the press-in section of the at least one second press-in contact, thereby making it possible to directly see the press-in contact.

[0018] In a variation of the invention, the second space may also be defined by a portion of the cover.

[0019] The housing and / or cover may have recesses in areas of the space. One or more recesses may form part of an opening or a portion of a space.

[0020] In a variation of the structural component according to the invention, the at least one second press-in contact may have a plug connection section, which is a contact of a plug connector. This plug connector can be connected to a complementary plug connector to establish a plug connection through which an electric device (the structural component may be part of the electric device) can be connected to a power supply unit or an upper-level control unit, data bus, etc.

[0021] In an electric device according to the invention, having an electric drive and structural components according to the invention, the housing of the structural components houses the stator of the drive. Such a device according to the invention can be a pump, particularly a pump for motor vehicles. The housing can form a motor housing in which the rotor of the motor is rotatably supported. A further housing can be connected to the housing. This further housing can form a pump housing in which the impeller of the pump is rotatably supported. The pump impeller and the rotor are interconnected such that rotation of the rotor can be transmitted to the pump impeller. Attached Figure Description

[0022] The invention will now be described in more detail with reference to the accompanying drawings. Here, it is shown that:

[0023] Figure 1 A perspective view of the structural components according to the invention is shown, and

[0024] Figure 2 A cross-sectional view of a structural component according to the present invention is shown. Detailed Implementation

[0025] The structural assembly according to the invention includes a housing 1, a printed circuit board 2, circuitry 3 arranged on the printed circuit board 2, a cover 4, press-in contacts 5a and 5b, and a plug connector 6. The housing 1, cover 4, and plug connector 6 may be injection molded plastic parts. The plug connector 6 may be integrally connected to the cover 4.

[0026] The housing 1 is constructed in a can shape, and the inner cavity of the can-shaped housing 1 forms a motor chamber in which the rotor of the electric motor is arranged. An annular cavity is provided in the tubular wall of the housing 1, and the stator S of the electric motor is arranged in the cavity.

[0027] The end wall and cover 4 of the housing 1 form the electronic chamber of the structural assembly, in which the printed circuit board 2 is mostly arranged and the circuit 3 is completely arranged.

[0028] Circuit 3 is connected to stator S. For this purpose, the first press-in contact 5a of the press-in contacts 5a and 5b is arranged in the wall on the end side of housing 1. These first press-in contacts 5a have a press-in section and a fastening section. The press-in section is pressed into and thus fastened to the printed circuit board 2 and electrically connected to circuit 3. The fastening section is embedded in the wall on the end side, thereby fixing the first press-in contact to housing 1. The first press-in contact also has a contact section through which circuit 3 is electrically connected to stator S.

[0029] Circuit 3 is also connected to a plug connector having a plug connector 6. For this purpose, a second press-in contact 5b of the press-in contacts 5a and 5b is arranged in the plug connector 6 and the cover 4. These second press-in contacts 5b have a press-in section and a fastening section, the press-in section being pressed into and thus fastened to the printed circuit board 2 and electrically connected to circuit 3, the fastening section being embedded in the cover 4 or the plug connector 6, thereby fixing the first press-in contact to the cover 4 or the plug connector 6, and the first press-in contact having a contact section extending into the plug connector 6 and forming a device plug together with the plug connector 6.

[0030] Press-in contacts 5a and 5b are pressed into the printed circuit board 2 from different sides. The first press-in contact 5a is pressed in from the first side of the printed circuit board 2, and the second press-in contact 5b is pressed in from the second side of the printed circuit board 2, where the structural components of the circuit 3 are also arranged. However, the structural components of the circuit can also be arranged on the first side.

[0031] The structural components are installed in such a manner that the printed circuit board 2, which already has the circuit 3 installed, is mounted on the housing 1. For this purpose, a press-in section of the first press-in contact 5a is introduced and pressed into a hole provided for this purpose in the printed circuit board 2. It can then be visually inspected to ensure that the press-in section of the first press-in contact 5a is cleanly introduced into the hole of the printed circuit board 2 and is securely positioned there. Then, the cover 4 and the plug 6 are placed on the printed circuit board 2, and a press-in section of the second press-in contact 5b is introduced and pressed into a hole provided for this purpose in the printed circuit board 2. To further verify, visually, that the second press-in contact is introduced into the hole as desired and is securely pressed there, the hole in the printed circuit board 2 is located in an area of ​​the printed circuit board 2 not located in the electronic chamber of the structural component, and the press-in section of the second press-in contact 5b is pressed into said hole. The end of the press-in section of the second press-in contact 5b (the end extending from the printed circuit board on the first side of the printed circuit board) is arranged in a recess in the housing 1, which is open outward. This allows for visual inspection to check for installation defects after the second press-in contact has been pressed into the hole provided for this purpose on the printed circuit board. The recess can then be sealed after such inspection. This can be done using additional components or castings to fill the recess. Similarly, other means can be used to seal the recess if it is meaningful or necessary.

[0032] List of reference numerals

[0033] 1 housing component

[0034] 2 Printed Circuit Boards

[0035] 3 circuits

[0036] 4 lids

[0037] 5a First Press-in Contact

[0038] 5b Second Press-in Contact

[0039] 6 plug connectors

Claims

1. A structural component of an electric device, the structural component comprising: Housing component (1); Printed circuit board (2), the printed circuit board being arranged on the outside of the housing (1); Circuit (3), the circuit being arranged on a printed circuit board (2); as well as The cover, together with the housing component (1), forms an electronic chamber, in which the circuit (3) is arranged; The structural component has a press-in contact with a press-in section that is pressed into and thus secured to the printed circuit board (2) and connected to the circuit (3). The press-in contact has a securing section and a contact section, through which the circuit (3) can be electrically connected from an external contact. The press-in contact has at least one first press-in contact (5a), the press-in section of the first press-in contact being press-in into the printed circuit board (2) from a first side, the fastening section of the first press-in contact being fastened to the wall of the housing (1), and the contact section of the first press-in contact extending into the housing (1). The press-in contact has at least one second press-in contact (5b), the press-in section of the second press-in contact being pressed into the printed circuit board (2) from a second side, the fastening section of the second press-in contact being fastened in the cover (4), and the contact section of the second press-in contact extending out from the cover (4). Its features are, The following area of ​​the printed circuit board (2) and the housing (1) define a space, the end of the press-in section of the at least one second press-in contact (5b) extends from the area, and the end of the press-in section of the at least one second press-in contact (5b) extending from the printed circuit board (2) on the first side of the printed circuit board extends into the space, wherein the space has an outward opening.

2. The structural component according to claim 1, characterized in that, The opening allows observation of the end of the press-in section of the at least one second press-in contact (5b) extending from the printed circuit board (2) on the first side of the printed circuit board.

3. The structural component according to claim 1 or 2, characterized in that, The space is also defined by a portion of the cover (4).

4. The structural component according to claim 1 or 2, characterized in that, The housing component (1) and / or the cover (4) form a recess in the region of the space.

5. The structural component according to claim 1 or 2, characterized in that, The at least one second press-in contact (5b) has a plug connection section, which is a contact of the plug connector (6).

6. An electric device comprising an electric actuator and a structural component according to any one of claims 1 to 5, characterized in that, The housing (1) houses the stator of the device's drive.

7. The device according to claim 6, characterized in that, The device is a pump.

8. The device according to claim 7, characterized in that, The device is a pump used in motor vehicles.

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