Inductance line terminal assembly and connecting device thereof

Abstract

The utility model discloses an inductance wire terminal assembly and a connecting device thereof, and the inductance wire terminal assembly comprises a terminal shell which is provided with a shell cover; the inductance wire comprises a wire body and an R terminal, one end of the R terminal is fixedly connected with the wire body, the other end of the R terminal is bent and then installed on the terminal shell, the installation axis of the R terminal is not perpendicular to the axis of the wire body, the wire body is arranged between the terminal shell and the shell cover, and the terminal shell and the shell cover do not exceed the plane where the end face of the side, away from the terminal shell, of the R terminal is located. The connecting device comprises the inductance wire terminal assembly and further comprises a PCB. A heat sink; the inductance line terminal assembly is fixedly installed between the PCB and the radiator, and the end face of the side, away from the terminal shell, of the R terminal abuts against the PCB. By bending the R terminal, the highest point of the terminal shell and the highest point of the shell cover do not exceed the plane where the end face of the R terminal is located, the end face of the R terminal can directly abut against the PCB, a gasket does not need to be arranged, the material cost is reduced, the assembly procedure is simplified, the risk of poor contact is eliminated, and the reliability is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of inverter cable wiring process, and discloses an inductor wire terminal assembly and a connecting device thereof. BACKGROUND

[0002] In power electronic devices such as inverters, the wiring process of inductor wires directly affects the electrical performance, reliability and production cost of the whole machine. At present, there are mainly two common wiring methods for inductor wires: one is that the inductor wire is wound from the bottom of a power PCB to the outer edge of the board, and then is folded to the upper surface of the PCB to be fixed with a terminal; and the other is that the inductor wire is completely wired under the PCB, and is fixed with a Z-shaped hook type R terminal and a terminal shell with back glue.

[0003] However, the above existing solutions have obvious defects:

[0004] In the first method, the wiring path of the inductor wire is long, and the inductor wire is prone to interference with the plug-in pins on the PCB at the bottom section of the PCB, which may cause the pins to pierce the insulating layer of the wire, thereby affecting the connection reliability and causing the EMC performance of the whole machine to decrease. Meanwhile, the inductor wire is exposed above the PCB, which affects the neatness and aesthetics of the internal wiring.

[0005] In the second method, although the wiring under the board is achieved, the R terminal adopts a Z-shaped hook type, which is relatively high in cost. Moreover, the R terminal is usually a straight structure without bending, which causes the shell cover above the terminal shell to become the highest point of the assembly after assembly. When the assembly is installed under the PCB, the protruding shell cover cannot make the end surface of the R terminal directly contact the PCB, and therefore a gasket or the like needs to be additionally arranged between the PCB and the terminal assembly for filling and compensation, which not only increases the cost of additional parts and the assembly process, but also introduces the risk of unreliable connection due to loosening of the gasket. In addition, since the R terminal lacks bending angles for guidance and positioning, the unconstrained wire body is prone to contact or extrusion with the dense plug-in pins on the back of the PCB in the narrow space at the bottom of the PCB, which may cause the insulating layer to be pierced and short-circuited, and the vibration or displacement of the wire body may also interfere with the adjacent signals, thereby posing a potential threat to the electrical safety and stability, and thus needs to be improved. CONTENT OF THE INVENTION

[0006] The application aims to provide an inductor wire terminal assembly.

[0007] Another object of the application is to provide a connecting device.

[0008] To achieve the above objectives, the technical solution adopted in this application is as follows: an inductor terminal assembly, comprising: a terminal housing, on which a cover is mounted; an inductor wire, the inductor wire comprising a wire body and an R terminal, one end of the R terminal being fixedly connected to the wire body, and the other end being bent and mounted on the terminal housing, wherein its mounting axis is not perpendicular to the axis of the wire body, the wire body being placed between the terminal housing and the cover, and neither the terminal housing nor the cover extending beyond the plane of the end face of the R terminal on the side away from the terminal housing.

[0009] As a preferred embodiment, the terminal housing includes a housing with a fixing groove and a limiting groove. The R terminal is fixedly installed in the fixing groove, and the wire is placed in the limiting groove. A limiting buckle is provided between the fixing groove and the limiting groove, and the limiting buckle is configured to restrict the sliding of the R terminal. A wire buckle is provided on the limiting groove, and the wire buckle is configured to restrict the wire from leaving the limiting groove. The housing cover is fastened to the limiting groove, and the housing cover is configured to restrict the inductor wire from leaving the terminal housing.

[0010] Further preferably, the side wall of the limiting groove is provided with a clearance slope, the cover is installed on the clearance slope, and the clearance slope is configured such that the assembled cover does not exceed the plane of the end face of the R terminal away from the terminal shell.

[0011] Preferably, a rivet nut is press-fitted onto the R terminal, and the rivet nut is installed in the fixing groove.

[0012] As a preferred embodiment, the angle between the mounting axis of the R terminal and the axis of the wire body is 70°~80°.

[0013] A connection device includes the aforementioned inductor terminal assembly, and further includes: a PCB board; a heat sink; the inductor terminal assembly is fixedly installed between the PCB board and the heat sink, and the end face of the R terminal away from the terminal shell abuts against the PCB board.

[0014] As a preferred embodiment, the PCB board and the R terminal are fixedly connected by screws, and there is a gap between the cover and the PCB board.

[0015] As a preferred embodiment, the heat sink has an installation groove, the bottom of the installation groove has a positioning groove, the lower side of the terminal housing has a positioning post, and the positioning post has a plurality of protrusions. During installation, the terminal housing is accommodated in the installation groove, and the positioning post is embedded in the positioning groove, and the protrusions are configured to form an interference fit with the inner sidewall of the positioning groove.

[0016] As a preferred embodiment, the radiator has a wire groove, and a pressure plate is provided above the wire groove. During installation, the wire is laid in the wire groove and fixed by the pressure plate to prevent it from leaving the wire groove.

[0017] In a further preferred embodiment, the heat sink is provided with an inductor cavity, the inductor cavity is provided with a cover, the cover is provided with a notch near the wire groove, and the wire extends into the inductor cavity through the notch.

[0018] Compared with the prior art, the beneficial effects of this application are as follows:

[0019] (1) By bending the R terminal, the highest point of the terminal shell and the shell cover does not exceed the plane where the R terminal end face is located, thereby significantly reducing the overall installation height of the terminal assembly. This allows the R terminal end face to directly and firmly abut against the PCB board without the need for gaskets in the prior art. This not only reduces material costs and simplifies the assembly process, but also fundamentally eliminates the risk of poor contact caused by loose and aging gaskets, greatly improving the long-term reliability of electrical connections.

[0020] (2) The bent R terminal provides a clear guide for the wire connected to it. At the same time, it constrains the wire between the terminal shell and the shell cover. This dual positioning and fixing design limits the path of the wire under the PCB board and forms an effective and reliable safety isolation between it and the dense plug-in pins on the back of the PCB. It eliminates the short circuit risk of the wire insulation layer being pierced by the pins. This not only improves the safety and reliability of the product, but also helps stabilize the EMC performance of the whole machine by reducing the potential electrical short circuit risk.

[0021] (3) The bent R terminal used in this solution has a mature and simple process and its cost is significantly lower than that of the customized Z-shaped hook type complex terminal. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the inductor terminal assembly of this utility model.

[0023] Figure 2 This is a three-dimensional structural diagram of the inductor terminal assembly of this utility model.

[0024] Figure 3 This is an exploded three-dimensional view of the inductor terminal assembly of this utility model.

[0025] Figure 4 This is a front view of the inductor terminal assembly of this utility model.

[0026] Figure 5 This is a three-dimensional structural diagram of the connecting device of this utility model.

[0027] Figure 6 This is an exploded three-dimensional view of the connecting device of this utility model.

[0028] Figure 7 This is a cross-sectional view of the terminal assembly of this utility model.

[0029] Figure 8 This is a three-dimensional structural diagram of the radiator housing of this utility model.

[0030] In the diagram: 1. Inductor wire; 11. R terminal; 12. Wire body; 13. Press-fit nut; 2. Terminal shell; 21. Housing; 211. Positioning post; 2111. Protruding post; 212. Fixing groove; 213. Limiting groove; 214. Avoidance slope; 215. Wire clip; 216. Limiting clip; 22. Shell cover; 3. PCB board; 4. Heat sink; 41. Inductor cavity; 42. Wire groove; 43. Mounting groove; 44. Positioning groove; 5. Cover; 6. Pressure plate; 7. Screw. Detailed Implementation

[0031] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0032] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0033] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0034] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0035] A preferred embodiment of this application, such as Figures 1 to 4As shown, an inductor terminal assembly includes: a terminal housing 2, on which a cover 22 is mounted; an inductor 1, which includes a wire body 12 and an R terminal 11, one end of which is fixedly connected to the wire body 12, and the other end is bent and mounted on the terminal housing 2, and its mounting axis is not perpendicular to the axis of the wire body 12. The wire body 12 is placed between the terminal housing 2 and the cover 22, and neither the terminal housing 2 nor the cover 22 extends beyond the plane of the end face of the R terminal 11 away from the terminal housing 2.

[0036] In the above solution, bending the R terminal 11 ensures that the highest point of the entire terminal housing 2 is not higher than the end face of the R terminal 11, allowing the end face of the R terminal 11 to directly contact the PCB board 3 during installation. This eliminates the need for additional gaskets, reduces costs and assembly complexity, and improves connection reliability. Simultaneously, bending the R terminal 11 creates a non-perpendicular angle between its mounting axis and the axis of the wire 12, enabling the wire 12 to be led out laterally from the R terminal 11. This provides a predetermined and clear routing direction for the wire 12, allowing it to be directly and smoothly arranged below the PCB board 3, avoiding the risk of interference with pins on the back of the PCB and shortening the routing path. Furthermore, partially encapsulating the wire 12 within the cavity formed by the terminal housing 2 and the cover 22 provides reliable fixation and protection for the wire 12, preventing displacement during vibration or damage from friction with external structures.

[0037] like Figure 3 As shown, the terminal housing 2 includes a housing 21, on which a fixing groove 212 and a limiting groove 213 are provided. The R terminal 11 is fixedly installed in the fixing groove 212, and the wire 12 is placed in the limiting groove 213, achieving precise positioning and initial fixation of the R terminal 11 and the wire 12, ensuring their positions in the housing 21 are determined, facilitating subsequent assembly. A limiting buckle 216 is provided between the fixing groove 212 and the limiting groove 213. The limiting buckle 216 is configured to restrict the sliding of the R terminal 11, ensuring the mechanical stability of the electrical connection and limiting the movement. A wire clip 215 is provided on the groove 213. The wire clip 215 is configured to restrict the wire 12 from leaving the limiting groove 213, preventing it from coming out without the cover 22. This facilitates pre-assembly and guides the wire 12, and also increases the pull-out resistance of the final structure. The cover 22 is fastened to the limiting groove 213. The cover 22 is configured to restrict the inductor wire 1 from leaving the terminal housing 2. Together with the terminal housing 2, it forms a complete protective and fixing structure, making the terminal assembly a modular component that is easy to handle and install, improving assembly efficiency and consistency.

[0038] like Figure 3 and Figure 4As shown, further, a clearance slope 214 is provided on the side wall of the limiting groove 213, and the cover 22 is installed on the clearance slope 214. The clearance slope 214 is configured so that the assembled cover 22 does not exceed the plane of the end face of the R terminal 11 away from the terminal housing 2. By designing the clearance slope 214, the mounting base of the cover 22 is lowered, thereby reducing its overall height while ensuring that the cover 22 has sufficient strength and fastening function, ensuring that the flatness requirement of installation without a gasket is met, and optimizing space utilization.

[0039] like Figure 3 As shown, a CLS-M4-1 crimp nut 13 is crimped onto the R terminal 11. The crimp nut 13 is installed in the fixing groove 212. The crimp nut 13 provides a robust internal thread. When the terminal assembly needs to be mechanically fixed to the PCB board 3 by screws 7, the crimp nut 13 structure is more robust than directly tapping the thin-walled R terminal 11. It can withstand greater locking force and vibration, and is convenient for automated assembly. At the same time, the crimping process makes the crimp nut 13 and the R terminal 11 a single unit, which enhances the strength of the R terminal 11.

[0040] The angle between the mounting axis of R terminal 11 and the axis of the wire body 12 is 70°~80°. In this embodiment, a 75° angle is preferred, which can both allow for relatively gentle routing and avoid interference with the plug-in pins.

[0041] like Figures 5 to 8 As shown, a connection device includes the above-mentioned inductor terminal assembly, and further includes: PCB board 3; heat sink 4; the inductor terminal assembly is fixedly installed between PCB board 3 and heat sink 4, and the end face of R terminal 11 away from terminal shell 2 abuts against PCB board 3.

[0042] Compared to the existing technology of routing traces folded up from the outside of PCB board 3, this application achieves a simple under-board routing, reduces the number of paths, flattens the entire terminal assembly structure, and installs it close to PCB board 3, which greatly saves space on the bottom and sides of the PCB, provides greater flexibility for the layout of other components or heat dissipation design, is conducive to the miniaturization and high-density integration of products, greatly reduces costs, and is not complicated in terms of installation process.

[0043] More importantly, by bending the R terminal 11, this application ensures that the highest points of both the terminal housing 2 and the housing cover 22 do not exceed the plane where the end face of the R terminal 11 is located. This significantly reduces the overall installation height of the terminal assembly and allows the end face of the R terminal 11 to directly contact the PCB board 3. Unlike the prior art, which uses under-board routing, there is no need to set up shims to compensate for gaps. This not only reduces material costs and simplifies the assembly process, but also fundamentally eliminates the risk of poor contact caused by loose or aging shims, greatly improving the long-term reliability of electrical connections.

[0044] The bent R terminal 11 provides a clear guide for the wire 12 connected to it. At the same time, it constrains the wire 12 between the terminal housing 2 and the housing cover 22. This dual positioning and fixing design limits the path of the wire 12 under the PCB board 3 and forms an effective and reliable safety isolation between it and the dense plug-in pins on the back of the PCB. This eliminates the risk of short circuit caused by the pins piercing the insulation layer of the wire 12. This not only improves the safety and reliability of the product, but also helps stabilize the EMC performance of the whole machine by reducing the potential electrical short circuit risk.

[0045] Specifically, such as Figure 7 As shown, PCB board 3 and R terminal 11 are fixedly connected by screws 7, and there is a gap between the cover 22 and PCB board 3; Figure 1 and Figure 8 As shown, the heat sink 4 has a mounting groove 43, and the bottom of the mounting groove 43 has a positioning groove 44. The lower side of the terminal housing 2 is provided with a positioning post 211, and the positioning post 211 is provided with several protrusions 2111. During installation, the terminal housing 2 is accommodated in the mounting groove 43, and the positioning post 211 is embedded in the positioning groove 44. The protrusions 2111 are configured to form an interference fit with the inner sidewall of the positioning groove 44. The direct insertion and interference fit method makes installation convenient and prevents it from falling out. It does not require the use of adhesive, which reduces costs and improves reliability.

[0046] like Figure 8 As shown, the heat sink 4 has a wire groove 42, and a pressure plate 6 is provided above the wire groove 42. During installation, the wire 12 is laid in the wire groove 42 and fixed by the pressure plate 6 to prevent it from falling out of the wire groove 42. The heat sink 4 has an inductor cavity 41, and a cover 5 is provided on the inductor cavity 41. The cover 5 has a notch near the wire groove 42, and the wire 12 extends into the inductor cavity 41 through the notch. After the terminal shell 2 and the shell cover 22 complete the initial fixation of the end of the wire 12, the wire groove 42 and the pressure plate 6 provide secondary fixation. This can effectively prevent the wire 12 from shifting, loosening or rubbing against surrounding parts during equipment operation, which greatly improves the long-term reliability of the connection. In addition, the wire groove 42 accommodates the wire 12 and avoids interference with the plug pins, which would cause the insulation layer to be pierced by the pins.

[0047] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. An inductor terminal assembly, characterized in that, include: A terminal housing, on which a cover is mounted; an inductor wire, comprising a wire body and an R terminal, one end of the R terminal being fixedly connected to the wire body, and the other end being bent and mounted on the terminal housing, with its mounting axis not perpendicular to the axis of the wire body; the wire body being placed between the terminal housing and the cover, and neither the terminal housing nor the cover extending beyond the plane of the end face of the R terminal on the side away from the terminal housing.

2. The inductor terminal assembly as described in claim 1, characterized in that, The terminal housing includes a housing with a fixing groove and a limiting groove. The R terminal is fixedly installed in the fixing groove, and the wire is placed in the limiting groove. A limiting buckle is provided between the fixing groove and the limiting groove. The limiting buckle is configured to restrict the sliding of the R terminal. A wire buckle is provided on the limiting groove. The wire buckle is configured to restrict the wire from leaving the limiting groove. The housing cover is fastened to the limiting groove. The housing cover is configured to restrict the inductor wire from leaving the terminal housing.

3. An inductor terminal assembly as described in claim 2, characterized in that, The side wall of the limiting groove is provided with a clearance slope, and the cover is installed on the clearance slope. The clearance slope is configured such that the assembled cover does not exceed the plane of the end face of the R terminal away from the terminal shell.

4. An inductor terminal assembly as described in claim 2, characterized in that, A rivet nut is press-fitted onto the R terminal, and the rivet nut is installed in the fixing groove.

5. An inductor terminal assembly as described in claim 1, characterized in that, The angle between the mounting axis of the R terminal and the axis of the wire body is 70°~80°.

6. A connecting device, characterized in that, The inductor terminal assembly as described in any one of claims 1 to 5 further includes: a PCB board; a heat sink; the inductor terminal assembly is fixedly installed between the PCB board and the heat sink, and the end face of the R terminal away from the terminal housing abuts against the PCB board.

7. A connecting device as described in claim 6, characterized in that, The PCB board and the R terminal are fixedly connected by screws, and there is a gap between the cover and the PCB board.

8. A connecting device as described in claim 6, characterized in that, The heat sink has an installation groove, and the bottom of the installation groove has a positioning groove. The lower side of the terminal housing has a positioning post, and the positioning post has several protrusions. During installation, the terminal housing is accommodated in the installation groove, and the positioning post is embedded in the positioning groove. The protrusions are configured to form an interference fit with the inner sidewall of the positioning groove.

9. A connecting device as described in claim 6, characterized in that, The radiator has a wire groove, and a pressure plate is provided above the wire groove. During installation, the wire is laid in the wire groove and fixed by the pressure plate to prevent it from leaving the wire groove.

10. A connecting device as described in claim 9, characterized in that, The heat sink is provided with an inductor cavity, and the inductor cavity is provided with a cover. The cover has a notch near the wire groove, and the wire extends into the inductor cavity through the notch.

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