A connection structure and method between a wiring harness terminal and a wiring seat

Abstract

The present invention discloses a connection structure and method for a wiring harness terminal and a terminal block. In this connection structure, a wiring nut is embedded in the upper surface of the terminal block, a threaded hole is provided in the axial direction of the wiring nut, and elastic protrusions are provided on both sides of the upper end surface of the wiring nut. The elastic protrusions can deform to pre-fix the wiring harness terminal to the terminal block. The structure for pre-fixing the wiring harness terminal and the terminal block disclosed in the above technical solution has a simple structure, low manufacturing cost, easy operation, accurate positioning, and avoids damage to other components.

Description

Technical Field

[0001] The invention belongs to the technical field of electric junction boxes, and in particular relates to a connection structure and a connection method between a wiring harness terminal and a wiring seat. Background Art

[0002] When connecting lines using an electrical junction box, it is often necessary to first fix the wiring harness terminal at one end at a preset position, and then connect the wiring harness terminal at the other end to the junction box in a subsequent process.

[0003] For example, the high-voltage connections for the drive motor or generator of a pure electric or hybrid vehicle are typically made using a high-voltage junction box. Here, the three-phase wiring from the motor's stator must be connected separately to the three-phase wiring of the corresponding controller. In many cases, due to limited space, the motor's three-phase wiring needs to be pre-fixed to facilitate subsequent screw connection to the controller's three-phase output on the automated production line. However, the existing pre-fixing process is cumbersome, inefficient, and labor-intensive, impacting production schedules. Summary of the Invention

[0004] In view of the above problems, the present invention discloses a connection structure and a connection method between a wiring harness terminal and a wiring seat, so as to overcome the above problems or at least partially solve the above problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] On one hand, the present invention provides a connection structure between a wiring harness terminal and a terminal block, wherein a wiring nut is embedded on the upper surface of the terminal block, and a threaded hole is provided in the axial direction of the wiring nut, and elastic protrusions are provided on both side edges of the upper end surface of the wiring nut. The elastic protrusions can be deformed to pre-fix the wiring harness terminal on the terminal block.

[0007] Optionally, the wire nut and the wire holder are integrally formed, or are manufactured separately and then fixedly connected.

[0008] Optionally, the terminal block is further provided with a special-shaped boss at the position of each of the terminal nuts, and the setting position of the special-shaped boss allows the through hole on the wiring harness terminal to be concentrically aligned with the threaded hole on the terminal nut, and limits the terminal nut.

[0009] Optionally, the wire nut is made of metal and is injection molded with the wire holder, and a step surface is provided on the upper end surface of the wire nut, so that the part below the step surface of the wire nut is embedded in the wire holder to prevent the wire nut from falling off the wire holder.

[0010] Optionally, the cross section of the elastic protrusion piece is crescent-shaped or the longitudinal section of the elastic protrusion piece is L-shaped.

[0011] Optionally, the elastic protrusions on both sides of the wiring nut are tightly embraced by the wiring harness terminal after being squeezed and deformed; or,

[0012] The wiring harness terminal is engaged with the elastic protruding piece, thereby fixing the wiring harness terminal.

[0013] Optionally, the wiring seat is an injection-molded part, the wiring harness terminal is made of copper, and the wiring nut is made of plastic, resin or metal.

[0014] Optionally, the connection structure further includes a second wiring harness terminal, which is provided with a through hole and can be plugged into the wiring harness terminal, and the wiring harness terminal and the second wiring harness terminal are fixed to the threaded hole of the wiring nut by screws.

[0015] Optionally, the wiring harness terminal is a motor wiring harness terminal, the second wiring harness terminal is a controller wiring harness terminal, and there are multiple wiring blocks with the same or different heights.

[0016] Another aspect of the present invention provides a connection method for the above connection structure, the connection method comprising the following steps:

[0017] The motor harness terminal is overlapped on the wiring seat, and the through hole of the motor harness terminal is concentrically aligned with the threaded hole of the wiring nut by fine adjustment;

[0018] Apply pressure to the elastic protrusions of the wiring nut through a tool to squeeze and produce plastic deformation, thereby holding the motor wiring harness terminal tightly, or directly insert the motor wiring harness terminal into the elastic protrusions to achieve locking and fixing, thereby pre-fixing the motor wiring harness terminal;

[0019] After concentrically aligning the controller harness terminal through-hole, the motor harness terminal through-hole and the wiring nut threaded hole, screw in the screws to secure the connection.

[0020] The advantages and beneficial effects of the present invention are:

[0021] The structure for pre-fixing the wiring harness terminal and the terminal block disclosed in the above technical solution has a simple structure, low manufacturing cost, easy operation, accurate positioning, and avoids damage to other components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0023] Figure 1 1 is a schematic diagram of the connection structure between the wiring harness terminal and the terminal block in one embodiment of the present invention;

[0024] Figure 2 is a schematic structural diagram of a wire nut in one embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of the connection structure of the motor wiring harness and the controller wiring harness in one embodiment of the present invention.

[0026] In the figure: 1. Terminal block; 2. Threaded hole; 3. Terminal nut; 4. Wire harness terminal; 5. Elastic protrusion; 6. Terminal block notch; 7. Step surface; 8. Special-shaped boss; 9. Motor wiring harness; 10. Controller wiring harness; 11. Screw. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more clear, the following will provide a clear and complete description of the technical solutions of the present invention in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] It should be understood that the terms "comprises / comprising," "consisting of," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product, apparatus, process, or method that includes a list of elements includes not only those elements but also, if necessary, other elements not explicitly listed, or elements inherent to such product, apparatus, process, or method. In the absence of further limitations, elements defined by the phrases "comprises / comprising," "consisting of," do not preclude the presence of additional identical elements in the product, apparatus, process, or method that includes the elements.

[0029] It should also be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device, component or structure referred to must have a specific direction, be constructed or operate in a specific direction, and should not be understood as limiting the present invention.

[0030] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] The technical solutions provided by various embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] Example 1

[0033] Figure 1 The embodiment shows a connection structure between a wiring harness terminal and a terminal block, wherein a wiring nut 3 is embedded on the upper surface of the terminal block 1, a threaded hole 2 is provided in the axial direction of the wiring nut 3, and elastic protrusions 5 are provided on both sides of the upper end surface of the wiring nut 3. The elastic protrusions 5 can be deformed to pre-fix the wiring harness terminal 4 on the terminal block.

[0034] Specifically, the elastic protrusion 5 and the wiring harness terminal 4 can be connected by snapping, and the wiring harness terminal 4 can be inserted between the two elastic protrusions mentioned above. At this time, the longitudinal cross-section of the elastic protrusion can be an inverted L-shape or other similar structure, so that the wiring harness terminal 4 is snapped onto the wiring nut 3.

[0035] In one embodiment, especially when the wire nut 3 is made of metal, the elastic protrusion can be squeezed and deformed by using a tool such as needle-nose pliers, and then the wire harness terminal 4 is tightly held. Figure 2 As shown in the structural diagram of the wire nut, the cross section of the elastic protrusion 5 is crescent-shaped, thereby facilitating the squeezing operation.

[0036] In one embodiment, the terminal nut 3 and the terminal holder 1 can be integrally formed, such as by injection molding or other processing methods, or they can be manufactured separately and then fixed together by screws or bolts.

[0037] Preferably, the material of the wire nut 3 is metal, and the material of the terminal block 1 is plastic or resin. During the manufacturing process, the wire nut 3 is embedded in the terminal block 1 by injection molding, and a step surface 7 is provided on the upper end surface of the wire nut 3, so that the part of the wire nut 3 under the step surface 7 is embedded in the terminal block during the injection molding process, and the part above it forms a part of the terminal block 1, thereby preventing the wire nut 3 from falling off the terminal block.

[0038] In one embodiment, combined Figure 1 The terminal block 1 is also provided with a special-shaped boss 8 at the position of the wire nut 3. The setting position of the special-shaped boss 8 makes the through hole on the wiring terminal concentrically aligned with the threaded hole on the wiring nut, and limits the wiring nut 3, thereby preventing the wiring terminal 4 from detaching from the terminal block slot 6.

[0039] In one embodiment, the terminal block 1 is preferably an injection molded part, and the material is plastic or resin; the material of the wiring harness terminal 4 is generally copper, which can be used for conductivity; and the material of the wire nut 3 can be selected from plastic, resin or metal according to the connection method.

[0040] In one embodiment, this embodiment also discloses the application of the above-mentioned connection structure in a new energy pure electric vehicle. At this time, the connection structure also includes a second wiring harness terminal such as a terminal of a controller wiring harness 10, and the wiring harness terminal can be a terminal of a motor wiring harness 9. A through hole is provided on the second wiring harness terminal, and the wiring harness terminal and the second wiring harness terminal can be plugged together, and then the wiring harness terminal 4 and the second wiring harness terminal are fixed to the threaded hole 2 of the wiring nut 3 by a screw 11.

[0041] Since the motor wiring harness and the controller wiring harness generally transmit three-phase electricity, in a preferred embodiment, there are three terminal blocks. Depending on the size of the junction box space, the terminal blocks can be set at the same height, or, when the space inside the junction box is small, they can also be arranged on platforms at different heights or two heights, thereby reducing the size of the junction box.

[0042] Example 2

[0043] This embodiment first discloses a junction box, which includes a junction box body and a junction box cover, and the above-mentioned connection structure is provided in the junction box body.

[0044] Furthermore, this embodiment 2 also discloses a connection method of the above connection structure, which includes the following steps:

[0045] The motor harness terminal is overlapped on the wiring seat 1 through the wiring seat notch 6, and the through hole of the motor harness 9 terminal is concentrically aligned with the threaded hole of the wiring nut 3 through fine adjustment and positioned by the special-shaped platform.

[0046] Then, the motor wiring harness terminal is installed. The elastic protrusion piece 5 of the wiring nut 3 is pressed by a tool such as needle-nosed pliers to produce plastic deformation and hold the motor wiring harness terminal tightly. Alternatively, the motor wiring harness terminal is directly inserted between the elastic protrusion pieces 5 to achieve locking and fixing, thereby pre-fixing the motor wiring harness terminal.

[0047] In the next step, after the terminal through-hole of the controller harness 10 is concentrically aligned with the terminal through-hole of the motor harness 9 and the threaded hole 2 of the wiring nut 3, the screw 11 is screwed in to fix the connection.

[0048] In summary, the above-mentioned connection structure, connection method and other technical solutions have a simple overall structure, low production cost, easy operation, accurate positioning, and avoidance of damage to other components.

[0049] The above description is only an embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modification, equivalent replacement, improvement, expansion, etc. made within the spirit and principle of the present invention are included in the scope of protection of the present invention.

Claims

1. A method for connecting a wiring harness terminal to a connection seat, characterized in that: A wire nut is embedded on the upper surface of the terminal block, a threaded hole is provided in the axial direction of the wire nut, and elastic protrusions are provided on both sides of the upper end surface of the wire nut, and the elastic protrusions can be deformed to pre-fix the wiring harness terminal on the terminal block; the wire nut and the terminal block are integrally formed, or are manufactured separately and then fixedly connected; the terminal block is further provided with a special-shaped boss at the position of each wire nut, and the setting position of the special-shaped boss makes the through hole on the wire harness terminal concentrically aligned with the threaded hole on the wire nut, and limits the wire nut; the cross-section of the elastic protrusion is crescent-shaped, and the elastic protrusions on both sides of the wire nut are tightly clamped to the wire harness terminal after being squeezed and deformed; the connection method comprises: Lap the motor harness terminal onto the terminal block, and align the through hole of the motor harness terminal with the threaded hole of the terminal nut concentrically by fine-tuning; Apply pressure to the elastic protrusion of the wiring nut through a tool to squeeze it to produce plastic deformation and hold the motor wiring harness terminal tightly. After concentrically aligning the controller harness terminal through-hole, the motor harness terminal through-hole and the wiring nut threaded hole, screw in the screws to secure the connection.

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