Electric control unit double-layer plate grounding structure

Abstract

The utility model relates to the technical field of automobile steering systems, in particular to a double-layer board grounding structure of an electric control unit, which comprises a connector, an upper cover, an upper PCB (printed circuit board), a connecting mechanism, a lower PCB and a base, the upper cover covers the top of the base, the connector, the upper PCB and the lower PCB are mounted in a space between the upper cover and the base from top to bottom, the connector is mounted on the inner surface of the upper cover, and the lower PCB is mounted on the inner surface of the upper cover. The connector, the upper PCB, the lower PCB and the base are connected through a connecting mechanism, the two ends of the connecting mechanism are connected with the connector and the base respectively, and the middle of the connecting mechanism is supported between the upper PCB and the lower PCB. Compared with the prior art, the connector is used as a transfer, and the upper cover is fixed with the insert of the connector, so that the design and installation of the upper cover are simplified, and current transmission is also facilitated; through the connecting mechanism, the connector, the upper PCB, the lower PCB and the base are fixed and grounded at the same time, and the electromagnetic compatibility is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile steering systems, in particular to a double-layer plate grounding structure of an electric control unit. Background Art

[0002] In the automotive steering system, the electronic control unit is used to control the motor. With the increase in motor power and the increase in motor and vehicle functions, the single-layer structure of the electronic control unit PCB board can no longer meet the requirements of electromagnetic compatibility of components.

[0003] To solve this problem, consider separating the logic board and power board of the single-layer PCB board of the electronic control unit, and set up a double-layer board with the upper layer as the logic board and the lower layer as the power board. The logic board mainly processes TAS and vehicle CAN signals, and the power board controls the motor current.

[0004] However, a single-layer PCB has only one board, and can be directly grounded through the base. The existing grounding method of a single-layer PCB cannot be fully applicable to a double-layer board.

[0005] Therefore, it is necessary to design a double-layer board grounding structure for the electronic control unit, use a connector to realize the transfer of the upper and lower PCB boards, and solve the assembly, support, and connectivity between the connector, double-layer board, upper cover, and base to meet their respective grounding requirements. Summary of the invention

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a double-layer board grounding structure for an electric control unit, which uses a connector to realize the transfer of upper and lower PCB boards, and solves the assembly, support and connection between the connector, the double-layer board, the upper cover and the base, thereby meeting their respective grounding requirements.

[0007] In order to achieve the above-mentioned purpose, the utility model is a double-layer board grounding structure of an electric control unit, including a connector, an upper cover, an upper PCB board, a connecting mechanism, a lower PCB board, and a base. The upper cover covers the top of the base, and the connector, the upper PCB board, and the lower PCB board are installed from top to bottom in the space between the upper cover and the base. The connector is installed on the inner surface of the upper cover, and the connector, the upper PCB board, the lower PCB board and the base are connected by a connecting mechanism. The two ends of the connecting mechanism are respectively connected to the connector and the base, and the middle part of the connecting mechanism is supported between the upper PCB board and the lower PCB board.

[0008] The connector is provided with two or more grounding structures, each of which includes a bushing, a connector, and an insert. The insert is connected to the upper cover, the bushing is connected to the upper end of the connecting mechanism, and the insert and the bushing are connected by a connector.

[0009] The upper end of the connector passes through the through hole on the surface of the upper cover and is exposed.

[0010] The connecting mechanism includes a rigid pin, a support rod, and a flexible pin. The two ends of the support rod are respectively provided with a rigid pin and a flexible pin. The rigid pin and the bushing are interference fit. The flexible pin is inserted into the mounting hole of the base. The support rod is supported between the upper PCB board and the lower PCB board.

[0011] The cross section of the rigid pin is circular.

[0012] The flexible pin is spiral-shaped.

[0013] The insert and the upper cover, the insert and the connecting member, the connecting member and the bushing, the bushing and the connecting mechanism, the connecting mechanism and the upper PCB board, the connecting mechanism and the lower PCB board, and the connecting mechanism and the base are all electrically connected.

[0014] Compared with the prior art, the utility model adopts a connector as a transfer, and the upper cover is fixed with an insert of the connector, which simplifies the design and installation of the upper cover and facilitates current transmission; through the connection mechanism, the connector, the upper PCB board, the lower PCB board and the base are fixed and grounded at the same time, thereby improving electromagnetic compatibility performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the utility model.

[0016] Figure 2 It is a bottom view of the connector of the utility model.

[0017] Figure 3 It is a structural schematic diagram of the connection mechanism of the utility model.

[0018] Figure 4 This is a schematic diagram of the current transmission path of the utility model. Implementation

[0019] The utility model is now further described with reference to the accompanying drawings.

[0020] See also Figure 1 The utility model is a double-layer board grounding structure of an electric control unit, including a connector, an upper cover, an upper PCB board, a connecting mechanism, a lower PCB board, and a base. The upper cover 2 covers the top of the base 6. The space between the upper cover 2 and the base 6 is provided with a connector 1, an upper PCB board 3, and a lower PCB board 5 from top to bottom. The connector 1 is installed on the inner surface of the upper cover 2. The connector 1, the upper PCB board 3, the lower PCB board 5 and the base 6 are connected by a connecting mechanism 4. The two ends of the connecting mechanism 4 are respectively connected to the connector 1 and the base 6. The middle part of the connecting mechanism 4 is supported between the upper PCB board 3 and the lower PCB board 5.

[0021] See also Figure 2The connector 1 is provided with two or more grounding structures corresponding to the positive and negative groundings, which can optimize the ESD capability of the controller. Each grounding structure includes a bushing 11, a connector 12, and an insert 13. The insert 13 is connected to the upper cover 2, the bushing 11 is connected to the upper end of the connecting mechanism 4, and the insert 13 is connected to the bushing 11 by a connector 12. The material of the insert 13 is a metal with good conductivity.

[0022] The upper end of the connector 1 passes through the through hole on the surface of the upper cover 2 and is exposed so as to be connected to an external device.

[0023] See also Figure 3 The connecting mechanism 4 includes a rigid pin 42, a support rod 41, and a flexible pin 43. The two ends of the support rod 41 are respectively provided with a rigid pin 42 and a flexible pin 43. The rigid pin 42 is interference fit with the bushing 11, and the flexible pin 43 is inserted into the mounting hole of the base 6. The support rod 41 is supported between the upper PCB board 3 and the lower PCB board 5 to ensure a safe distance between the upper PCB board 3 and the lower PCB board 5.

[0024] The rigid pin 42 is made of stainless steel with good electrical conductivity. The cross section of the rigid pin 42 is circular to cooperate with the bushing 11 and provide connection firmness.

[0025] The flexible pin 43 is made of copper with good electrical conductivity and is spiral-shaped, thereby eliminating the matching gap between the lower PCB board 5 and the base 6 .

[0026] The insert 13 and the upper cover 2, the insert 13 and the connector 12, the connector 12 and the bushing 11, the bushing 11 and the connecting mechanism 4, the connecting mechanism 4 and the upper PCB board 3, the connecting mechanism 4 and the lower PCB board 5, and the connecting mechanism 4 and the base 6 are all electrically connected to ensure the fit and grounding of the upper cover 2 to the base 6.

[0027] See also Figure 4 The current is input from the upper cover 2, passed through the insert 13 on the connector 1, and transmitted to the bushing 11 via the connecting piece 12, and then transmitted from top to bottom to the base 6 by the connecting mechanism 4. The base 6 is generally connected to the steering gear of the whole vehicle through a motor and can be approximately connected to the ground, thereby realizing the grounding function.

[0028] The utility model adopts a connector as a transfer, and the upper cover is fixed with an insert of the connector, which simplifies the design and installation of the upper cover and facilitates current transmission. The connector, the upper PCB board, the lower PCB board and the base are fixed and grounded at the same time through the connection mechanism, thereby improving electromagnetic compatibility performance.

Claims

1. A double-layer board grounding structure of an electric control unit, comprising a connector, an upper cover, an upper PCB board, a connecting mechanism, a lower PCB board, and a base, characterized in that: The upper cover (2) covers the top of the base (6); a connector (1), an upper PCB board (3), and a lower PCB board (5) are installed from top to bottom in the space between the upper cover (2) and the base (6); the connector (1) is installed on the inner surface of the upper cover (2); the connector (1), the upper PCB board (3), the lower PCB board (5), and the base (6) are connected by a connecting mechanism (4); two ends of the connecting mechanism (4) are respectively connected to the connector (1) and the base (6); the middle part of the connecting mechanism (4) is supported between the upper PCB board (3) and the lower PCB board (5); The connector (1) is provided with two or more sets of grounding structures, each set of grounding structures comprising a bushing (11), a connecting piece (12), and an insert (13), the insert (13) being connected to the upper cover (2), the bushing (11) being connected to the upper end of the connecting mechanism (4), and the insert (13) and the bushing (11) being connected by a connecting piece (12).

2. The double-layer board grounding structure of an electric control unit according to claim 1, characterized in that: The upper end of the connector (1) passes through the through hole on the surface of the upper cover (2) and is exposed.

3. The double-layer board grounding structure of an electric control unit according to claim 1, characterized in that: The connecting mechanism (4) comprises a rigid pin (42), a support rod (41), and a flexible pin (43); the rigid pin (42) and the flexible pin (43) are respectively provided at both ends of the support rod (41); the rigid pin (42) and the bushing (11) are interference fit; the flexible pin (43) is inserted into a mounting hole of the base (6); and the support rod (41) is supported between the upper PCB board (3) and the lower PCB board (5).

4. The double-layer board grounding structure of an electric control unit according to claim 3, characterized in that: The cross section of the rigid pin (42) is circular.

5. The double-layer board grounding structure of an electric control unit according to claim 3, characterized in that: The flexible pin (43) is spiral-shaped.

6. The double-layer board grounding structure of an electric control unit according to claim 1, characterized in that: The insert (13) and the upper cover (2), the insert (13) and the connecting piece (12), the connecting piece (12) and the bushing (11), the bushing (11) and the connecting mechanism (4), the connecting mechanism (4) and the upper PCB board (3), the connecting mechanism (4) and the lower PCB board (5), and the connecting mechanism (4) and the base (6) are all electrically connected.

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