Fixing structure of EPS electronic control unit PCB and connector
By designing a fixed structure that utilizes positioning circles, positioning columns and bolts, the problem that the fixed structure of the EPS electronic control unit cannot be applied after canceling the heat dissipation base is solved, and high-precision positioning and independent fixing of PCBA and connectors are achieved, satisfying the satisfaction of Cost control requirements and sealing function are guaranteed.
Patent Information
- Application Number
- CN202421102628.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The fixed structure of the existing EPS electronic control unit cannot meet the requirements of component cost control after the heat dissipation base is cancelled, and the original fixed structure cannot be directly applied.
Design a fixed structure between the PCB board and the connector of the EPS electronic control unit, use the positioning circle and the positioning column of the upper cover to jointly position the PCBA, and independently fix the PCBA and the connector through the screw, and combine the fixed connection between the screw and the upper cover to realize the Multi-position and fixation method.
It realizes high-precision positioning and independent fixing of PCBA and connector, simplifies the production process, meets cost control requirements, and realizes sealing connection through sealing rings, ensuring the sealing function of the electronic control unit.
Smart Images
Figure CN222463498U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steering systems, in particular to a fixing structure of a PCB board and a connector of an EPS electronic control unit. Background Art
[0002] This ECU is used in EPS, and is used for fixing the circuit board PCB and other supporting parts inside the electronic control unit. Specifically, it is an electronic control unit, in which the upper cover is directly connected to the motor housing to ensure the sealing function, the PCBA and the connector receive the input signal of the whole vehicle and process the TAS and CAN signals, and the electronic control unit, the motor and other structural parts together constitute the motor controller part in the EPS. As the project gradually iterates, the cost control requirements for components are more stringent. There is a heat sink base in the ordinary electronic control unit, and the PCBA can be directly fixed on the heat sink base. Since this controller cancels the heat sink base component, the original fixing structure cannot be directly applied. Summary of the invention
[0003] The utility model provides a fixing structure of a PCB board and a connector of an EPS electronic control unit to overcome the deficiencies of the prior art. The upper cover uses a positioning circle and a positioning column to jointly position the PCBA, which has high accuracy. The PCBA and the connector can be independently fixed using a screw buckle, which is convenient for circulation during the production process.
[0004] To achieve the above purpose, a fixing structure of a PCB board and a connector of an EPS electronic control unit is designed, including a connector, an upper cover, a PCBA, and a shell. The upper part of the connector is a raised frame structure, and the lower part of the connector is connected to a plurality of positioning columns. The structure is characterized in that: the upper part of the connector passes through the upper cover, the positioning columns at the lower part of the connector pass through the PCBA and are fixed by a screw buckle, the bottom outer edge of the connector is embedded in the shell, and the connection between the bottom outer edge of the connector and the shell is sealed by a sealing ring; the PCBA and the connector are fixedly connected to the upper cover by screws.
[0005] There are at least two positioning posts on the connector, and the positioning posts are provided with flange structures connected to the turn buckles.
[0006] The buckle is composed of an outer buckle and an inner buckle. The outer buckle is a semicircular cylindrical structure, and outer buckle buckle grooves are respectively provided on both sides of the outer buckle, and an outer buckle inner groove is provided on the inner side of the outer buckle; the inner buckle is a semicircular cylindrical structure, and inner buckle buckles are respectively provided on both sides of the inner buckle, and an inner buckle inner groove is provided on the inner side of the inner buckle; the outer buckle is clamped with the inner buckle buckle of the inner buckle through the outer buckle inner grooves on both sides, and the outer buckle inner groove of the outer buckle and the inner buckle inner groove of the inner buckle are matched and connected with the flange structure on the positioning column.
[0007] The upper cover is provided with a plurality of frame openings which cooperate with the upper part of the connector, the upper cover located on one side of the frame opening is provided with a plurality of guide columns and fixing holes, positioning circles are provided on both sides of the upper cover respectively, and a heat dissipation block is provided at the lower part of the upper cover; a sealing groove which cooperates with the sealing ring is provided at the outer edge of the upper cover.
[0008] The two sides of the PCBA are respectively provided with guiding semicircular grooves matching with the positioning circle of the upper cover, and the PCBA is provided with a plurality of positioning holes, guiding holes and threaded holes respectively connected with the positioning columns of the connector, the guiding columns of the upper cover and the screws.
[0009] The screws are respectively connected through the PCBA, the connector and the upper cover, and a bushing is sleeved on the outer side of the screw.
[0010] Compared with the prior art, the utility model provides a fixing structure of a PCB board and a connector of an EPS electronic control unit. The upper cover uses a positioning circle and a positioning column to jointly position the PCBA, which has high accuracy; the PCBA and the connector can be independently fixed using a screw buckle, which is convenient for circulation during the production process. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic diagram of the overall structure of the motor controller.
[0012] Figure 2 It is a schematic diagram of the fixing structure of PCBA, connector and upper cover.
[0013] Figure 3 Schematic diagram of the upper cover structure.
[0014] Figure 4 It is a schematic diagram of the turnbuckle structure.
[0015] Figure 5 This is a schematic diagram of the PCBA connector subassembly.
[0016] Figure 6 This is a schematic diagram of the PCBA connector subassembly inside the housing. DETAILED DESCRIPTION
[0017] The utility model is further described below with reference to the accompanying drawings.
[0018] like Figures 1 to 6 As shown, the upper part of the connector 1 is a raised frame structure, the lower part of the connector 1 is connected to a plurality of positioning posts 1.1, the upper part of the connector 1 passes through the upper cover 2, the positioning posts 1.1 at the lower part of the connector 1 pass through the PCBA 3 and are fixed by a screw 4, the bottom outer edge of the connector 1 is embedded in the shell 5, and the connection between the bottom outer edge of the connector 1 and the shell 5 is sealed by a sealing ring 7; the PCBA 3 and the connector 1 are fixedly connected to the upper cover 2 by screws 6.
[0019] There are at least two positioning posts 1.1 on the connector 1, and a flange structure 1.1.1 connected to the rotary buckle 4 is provided on the positioning posts 1.1.
[0020] The turn buckle 4 is composed of an outer turn buckle 4.1 and an inner turn buckle 4.2. The outer turn buckle 4.1 is a semicircular cylindrical structure, and outer turn buckle buckle grooves 4.1.1 are respectively provided on both sides of the outer turn buckle 4.1, and an outer turn buckle inner groove 4.1.2 is provided on the inner side of the outer turn buckle 4.1; the inner turn buckle 4.2 is a semicircular cylindrical structure, and inner turn buckle buckles 4.2.1 are respectively provided on both sides of the inner turn buckle 4.2, and an inner turn buckle inner groove 4.2.2 is provided on the inner side of the inner turn buckle 4.2; the outer turn buckle 4.1 is clamped with the inner turn buckle buckle 4.2.1 of the inner turn buckle 4.2 through the outer turn buckle inner grooves 4.1.2 on both sides, and the outer turn buckle inner groove 4.1.2 of the outer turn buckle 4.1 and the inner turn buckle inner groove 4.2.2 of the inner turn buckle 4.2 are matched and connected with the flange structure 1.1.1 on the positioning column 1.1.
[0021] The upper cover 2 is provided with a plurality of frame openings 2.6 which cooperate with the upper part of the connector 1, and the upper cover 2 located on one side of the frame openings 2.6 is provided with a plurality of guide columns 2.1 and fixing holes 2.3, and positioning circles 2.2 are respectively provided on both sides of the upper cover 2, and a heat dissipation block 2.4 is provided at the lower part of the upper cover 2; and a sealing groove 2.5 which cooperates with the sealing ring 7 is provided at the outer edge of the upper cover 2.
[0022] Both sides of PCBA3 are provided with guiding semicircular grooves 3.1 matching with the positioning circle 2.2 of the upper cover 2, and PCBA3 is provided with a plurality of positioning holes 3.2, guide holes 3.3 and threaded holes connected with the positioning columns 1.1 of the connector 1, the guide columns 2.1 of the upper cover 2 and the screws 6 respectively.
[0023] The screws 6 penetrate through the PCBA 3 , the connector 1 and the upper cover 2 respectively, and a bushing 6 . 1 is sleeved on the outer side of the screws 6 .
[0024] like Figure 1 As shown, the controller has a multi-layer structure, the top layer is the connector 1, the connector 1 is positioned in coordination with the frame opening 2.6 on the upper cover 2, and is connected to the PCBA 3 through the positioning column 1.1, and is fixed by the screw buckle 4; the housing 5 is sealed and connected to the upper cover 2 through the sealing ring 7, thereby realizing the sealing function.
[0025] like Figure 2 As shown, PCBA3 first forms a small assembly with the connector 1: first, PCBA3 is passed through the positioning column 1.1, and then the turn buckle 4 is used to fix the two after tightening, and then the welding operation is carried out; a flange structure 1.1.1 is provided on the positioning column 1.1 for installation with the turn buckle 4; after the installation is completed, the PCBA3 and the connector 1 small assembly are guided and positioned by the positioning circle 2.2 and the guide column 2.1, and finally fixed to the fixing hole 2.3 by the screw 6 through the bushing 6.1.
[0026] like Figure 3 As shown, the upper cover 2 has certain features for realizing the positioning and fixing functions; the function of the guide column 2.1 is to position the PCBA3, and the number is 2 to 3. A stop surface is set at a certain position in the middle of the guide column 2.1 to realize hard limit; the positioning circle 2.2 functions to guide the PCBA3, and it plays an auxiliary role with the guide column 2.1; the fixing hole 2.3 is a screw hole, and the connector 1, PCBA3 and the upper cover 2 are fixed by screws 6; the heat sink 2.4 cooperates with the PCBA3 by applying heat dissipation glue and realizes the heat dissipation function. The heat dissipation glue used has a certain viscosity and can stick to the PCBA3 to realize auxiliary fixation; the sealing groove 2.5 is used to cooperate with the shell 5 for fixing, and sealing is realized by the sealing ring 7; the frame opening 2.6 is used for preliminary positioning between the upper cover 2 and the connector 1. Generally, the shape is the same as the size of the electrical outlet, and it realizes functions together with other components.
[0027] like Figure 4 As shown, the turn buckle 4 is composed of two parts, namely an outer turn buckle 4.1 and an inner turn buckle 4.2. Both turn buckles are provided with an outer turn buckle inner groove 4.1.2 and an inner turn buckle inner groove 4.2.2, which are used to cooperate with the flange structure 1.1.1 of the positioning column 1.1 on the connector 1; during the installation process, the inner turn buckle 4.2 is installed first, and then the outer turn buckle 4.1 is installed. When the outer turn buckle buckle groove 4.1.1 is buckled with the inner turn buckle buckle 4.2.1, it is considered to be installed in place.
[0028] like Figure 5 As shown, PCBA3 is supplied in combination with connector 1, and PCBA3 is installed on connector 1; a positioning column 1.1 is provided on connector 1, PCBA3 is installed on connector 1 through positioning column 1.1, and then the two are fixed by installing the turn buckle 4 on the positioning column 1.1; connector 1 and PCBA3 need to be welded to realize their functions, and fixing through the turn buckle 4 can better meet the welding conditions.
[0029] like Figure 6 As shown, the PCBA3 and the connector 1 subassembly are installed by means of a guide post 2.1 provided on the upper cover 2. The guide post 2.1 is long enough to pass through the connector 1 and the PCBA3, and finally realizes its positioning function through a guide hole 3.2 provided on the PCBA3. During the preliminary installation process, it is necessary to realize preliminary positioning in the head area, so a positioning circle 2.2 is provided on the upper cover 2, which realizes rough positioning together with the guide semicircular groove 3.1 provided on the PCBA3, thereby making the installation process smoother.
[0030] The utility model discloses a fixing method for PCBA, connector and upper cover in a motor controller, which adopts a multiple positioning + fixing method. The PCBA and the connector are first positioned and fixed by a guide column and a screw buckle. After the upper cover and the connector are initially positioned by a frame opening, the positioning is then achieved by a positioning circle and the PCBA. Finally, the PCBA and the connector are fixed to the upper cover together by screws. A certain amount of glue is also applied to the heat dissipation block of the upper cover to assist in bonding and fixing the PCBA and to play a certain heat dissipation role.
Claims
1. A fixing structure for a PCB board and a connector of an EPS electronic control unit, comprising a connector, an upper cover, a PCBA, and a housing, wherein the upper part of the connector (1) is a raised frame structure, and the lower part of the connector (1) is connected to a plurality of positioning columns (1.1), characterized in that: The upper part of the connector (1) passes through the upper cover (2), the positioning column (1.1) at the lower part of the connector (1) passes through the PCBA (3) and is fixed by a screw buckle (4), the bottom outer edge of the connector (1) is embedded in the shell (5), and the connection between the bottom outer edge of the connector (1) and the shell (5) is sealed by a sealing ring (7); the PCBA (3) and the connector (1) are fixedly connected to the upper cover (2) by screws (6).
2. The fixing structure of the EPS electronic control unit PCB board and the connector according to claim 1 is characterized in that: At least two positioning posts (1.1) are provided on the connector (1), and a flange structure (1.1.1) connected to the rotary buckle (4) is provided on the positioning post (1.1).
3. A fixing structure of a PCB board and a connector of an EPS electronic control unit according to claim 1 or 2, characterized in that: The rotating buckle (4) is composed of an outer rotating buckle (4.1) and an inner rotating buckle (4.2). The outer rotating buckle (4.1) is a semicircular cylindrical structure. The outer rotating buckle buckle grooves (4.1.1) are respectively provided on both sides of the outer rotating buckle (4.1), and the inner side of the outer rotating buckle (4.1) is provided with an outer rotating buckle inner groove (4.1.2); the inner rotating buckle (4.2) is a semicircular cylindrical structure. The inner rotating buckle buckles (4.2.1) are respectively provided on both sides of the inner rotating buckle (4.2). ), an inner screw buckle inner groove (4.2.2) is provided on the inner side of the inner screw buckle (4.2); the outer screw buckle (4.1) is snap-connected with the inner screw buckle buckle (4.2.1) of the inner screw buckle (4.2) through the outer screw buckle inner grooves (4.1.2) on both sides, and the outer screw buckle inner groove (4.1.2) of the outer screw buckle (4.1) and the inner screw buckle inner groove (4.2.2) of the inner screw buckle (4.2) are matched and connected with the flange structure (1.1.1) on the positioning column (1.1).
4. The fixing structure of the EPS electronic control unit PCB board and the connector according to claim 1 is characterized in that: The upper cover (2) is provided with a plurality of frame openings (2.6) that cooperate with the upper part of the connector (1); the upper cover (2) located on one side of the frame opening (2.6) is provided with a plurality of guide columns (2.1) and fixing holes (2.3); positioning circles (2.2) are provided on both sides of the upper cover (2); a heat sink (2.4) is provided at the lower part of the upper cover (2); and a sealing groove (2.5) that cooperates with the sealing ring (7) is provided at the outer edge of the upper cover (2).
5. The fixing structure of the EPS electronic control unit PCB board and the connector according to claim 1 is characterized in that: The PCBA (3) is provided with guide semicircular grooves (3.1) on both sides thereof, which match the positioning circles (2.2) of the upper cover (2). The PCBA (3) is provided with a plurality of positioning holes (3.2), guide holes (3.3) and threaded holes, which are respectively connected to the positioning columns (1.1) of the connector (1), the guide columns (2.1) of the upper cover (2) and the screws (6).
6. The fixing structure of the EPS electronic control unit PCB board and the connector according to claim 1, characterized in that: The screws (6) respectively penetrate the PCBA (3), the connector (1) and are connected to the upper cover (2), and a bushing (6.1) is provided on the outer side of the screws (6).