A wiring terminal anti-bending connection structure

Abstract

The utility model discloses a kind of wiring terminal anti-bending connection structure, it is related to electrical connector technical field.It includes terminal ring, connecting arm and the biaxial movable joint formed by transverse rotating arm and vertical rotating arm by first, second hinged shaft connection.It is sequentially connected fixed column and connecting ring in vertical rotating arm end.The fixed column is equipped with the wire pressing cap with internal thread, and its end portion is provided with threading hole.The core of the utility model is that when wire is fixed to connecting ring and is under external force, bending or torsion load is absorbed and replaced by the rotary motion of biaxial movable joint, so that repeated bending deformation and metal fatigue fracture of wire at the root of crimping point are completely avoided.The structure realizes multidirectional dynamic stress protection, and greatly improves the mechanical reliability and service life of wiring terminal under complex working conditions such as vibration, frequent plugging.

Description

Technical Field

[0001] This utility model relates to the field of electrical connection device technology, specifically to a terminal block anti-bending connection structure. Background Technology

[0002] Terminal blocks, as fundamental components for connecting and conducting wires in electrical circuits, are widely used in industrial control, home appliances, automobiles, new energy, and other fields. In practical use, the connection point between the wire and the terminal block (i.e., the crimp point) is a weak point in terms of mechanical strength.

[0003] Currently, to prevent breakage due to repeated bending, the industry generally adopts the following two technical approaches: 1. Rigid Reinforcement: A rigid insulating sheath or heat-shrink tubing is fitted over the connection between the conductor and the terminal to increase local rigidity and resist bending. However, this method only slightly improves the bending radius and does not address the root cause. Stress remains concentrated at the conductor root at the end of the sheath, and the conductor will still break due to metal fatigue under long-term or significant bending.

[0004] 2. Flexible Protection Type: This type uses soft rubber or corrugated tubing to cover the connection, allowing the conductor to bend within a certain range. While this method can distribute some stress, the conductor core itself still needs to deform, and the problem of bending fatigue life is not fundamentally solved. Furthermore, the soft protective sleeve has low mechanical strength and is prone to wear and crushing under complex working conditions, resulting in limited protective effectiveness.

[0005] Analysis reveals that the fundamental flaw in existing technologies lies in their passive protection approach: they attempt to "strengthen" or "protect" the conductor itself to resist bending, without changing the fundamental premise that "the conductor must be a flexible moving part." Therefore, when connectors require frequent plugging and unplugging, equipment vibrates, or conductors need multi-directional adjustment, the reliability of these solutions is clearly insufficient, easily leading to malfunctions such as poor contact, power outages, or even short circuits.

[0006] Therefore, we propose a terminal block anti-bending connection structure. Utility Model Content

[0007] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a terminal anti-bending connection structure. By introducing a movable joint with lateral and vertical rotational degrees of freedom, the external bending force is converted into the rotational motion of the joint, fundamentally eliminating bending fatigue of the wire at the terminal connection point, realizing multi-directional, fully dynamic stress protection, improving the mechanical life and reliability of the connection structure, and effectively solving the problems in the background technology.

[0008] (II) Technical Solution To achieve the above objectives, the technical solution adopted by this utility model is as follows: a terminal anti-bending connection structure, including a terminal ring, a connecting arm fixedly installed on one side of the terminal ring, a horizontal rotating arm provided on the upper part of the connecting arm, a first hinge shaft provided between the horizontal rotating arm and the connecting arm, the horizontal rotating arm being rotatably connected to the connecting arm through the first hinge shaft, a fixed arm fixedly installed on the upper outer surface of the horizontal rotating arm away from the first hinge shaft, a vertical rotating arm provided on one side of the fixed arm, a second hinge shaft provided between the vertical rotating arm and the fixed arm, the vertical rotating arm being rotatably connected to the fixed arm through the second hinge shaft, a fixed post fixedly installed on the vertical rotating arm away from the second hinge shaft, and a connecting ring fixedly installed on the fixed post away from the vertical rotating arm.

[0009] Preferably, the outer cover of the fixing post and the connecting ring is provided with a wire cap.

[0010] Preferably, the wire cap has a threading hole at the center of the end away from the opening, and the threading hole extends into the interior of the wire cap.

[0011] Preferably, the outer wall of the fixing post is provided with external threads, and the inner end of the wire cap away from the wire hole is provided with internal threads.

[0012] Preferably, the pressure cap is connected to the external thread on the outer wall of the fixing column via an internal thread.

[0013] Preferably, the outer wall of the pressure cap is provided with anti-slip texture.

[0014] (III) Beneficial Effects Compared with the prior art, this utility model provides a terminal block anti-bending connection structure, which has the following beneficial effects: 1. This terminal anti-bending connection structure creatively transforms the traditional rigid / semi-rigid connection of "wire-terminal" into a flexible hinged connection of "rigid terminal-moving joint-wire". When the wire is subjected to external bending force, the force is converted into the rotational motion of the moving joint, rather than the plastic bending deformation of the wire itself. This change in principle completely eliminates the metal fatigue caused by repeated bending at the root of the wire at the connection point, fundamentally solving the breakage problem and making the mechanical life of the connection point consistent with the life of the wire itself.

[0015] 2. This terminal block anti-bending connection structure features a movable joint (dual-axis hinge) design with multi-directional (lateral and vertical) deflection capability. Compared with traditional sheaths that can only protect against bending in a single plane, this utility model can effectively cope with bending, torsion and vibration from any direction, adapt to more complex actual installation and use conditions, and provide all-round dynamic stress protection.

[0016] 3. This type of terminal anti-bending connection structure, through the setting of the wire cap, facilitates flattening after the wire is connected to the connecting ring, improving the stability of the connection between the wire and the terminal and making it less likely to fall off. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a terminal block anti-bending connection structure according to the present invention.

[0018] Figure 2 This is an exploded view of the anti-bending connection structure for wiring terminals according to this utility model.

[0019] Figure 3 This is a schematic diagram of the vertical rotating arm in the anti-bending connection structure of the terminal block of this utility model.

[0020] Figure 4 This is a schematic diagram of the pressure cap in the anti-bending connection structure of the terminal block of this utility model.

[0021] In the diagram: 1. Terminal ring; 2. Connecting arm; 3. Horizontal rotating arm; 4. Fixed arm; 5. Vertical rotating arm; 6. First hinge shaft; 7. Second hinge shaft; 8. Wire cap; 9. Fixed post; 10. External thread; 11. Connecting ring; 12. Anti-slip texture; 13. Wire hole; 14. Internal thread. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] like Figure 1-4 As shown, this utility model provides a terminal anti-bending connection structure, which mainly includes a terminal ring 1, a connecting arm 2, a horizontal rotating arm 3, a fixed arm 4, a vertical rotating arm 5, a first hinge shaft 6, a second hinge shaft 7, a wire cap 8, a fixed post 9, an external thread 10, a connecting ring 11, an anti-slip texture 12, a wire hole 13, and an internal thread 14.

[0024] Terminal ring 1 is the base part for fixing this structure to the connected equipment (such as terminal blocks, equipment terminals, etc.). On one side of terminal ring 1, a connecting arm 2 is integrally formed. The upper part of connecting arm 2 is connected to a transverse rotating arm 3 through a first hinge shaft 6, so that the transverse rotating arm 3 can rotate freely around the first hinge shaft 6 in the horizontal plane (or transversely relative to the connecting arm 2).

[0025] A fixed arm 4 is fixedly installed on the upper outer surface of the transverse rotating arm 3, at the end away from the first hinge axis 6. A vertical rotating arm 5 is connected to one side of the fixed arm 4 via a second hinge axis 7, allowing the vertical rotating arm 5 to rotate freely in the vertical plane around the second hinge axis 7. Thus, the transverse rotating arm 3, the first hinge axis 6, the vertical rotating arm 5, and the second hinge axis 7 together constitute a movable joint with both transverse and vertical degrees of freedom of rotation.

[0026] A fixing post 9 is fixedly installed at the end of the vertical rotating arm 5 away from the second hinge axis 7. A connecting ring 11 is fixedly installed at the end of the fixing post 9 away from the vertical rotating arm 5. The end of the wire (not shown in the figure) can be stably electrically and mechanically connected to the connecting ring 11 by means of winding, welding, etc.

[0027] To protect the connection point between the wire and the connecting ring 11 and to further improve the stability of the connection, a wire cap 8 is provided on the outside of the fixing post 9 and the connecting ring 11. A wire hole 13 is provided in the middle of the end of the wire cap 8 away from the opening, and the wire hole 13 extends into the interior of the wire cap 8. The wire can be pre-passed through this wire hole 13 before connection.

[0028] To enable the detachable fixing and clamping function of the wire cap 8, an external thread 10 is provided on the outer wall of the fixing post 9, and correspondingly, an internal thread 14 is provided at the end of the inner cavity of the wire cap 8 away from the wire hole 13. During installation, the wire cap 8 is screwed into the external thread 10 on the outer wall of the fixing post 9 through its internal thread 14. When the wire cap 8 is tightened in place, its internal cavity will press against the connection between the wire and the connecting ring 11, which can prevent loosening and enhance the pull-out resistance. To facilitate the tightening operation, anti-slip texture 12 is provided on the outer wall of the wire cap 8.

[0029] Working principle: In use, first, fix the terminal ring 1 to the terminal block of the target device. Then, pass the end of the wire through the through hole 13 of the wire cap 8 and reliably connect it to the connecting ring 11. Next, put the wire cap 8 back on, aligning its internal thread 14 with the external thread 10 on the fixing post 9 and tightening it. During tightening, the inner cavity of the wire cap 8 presses against the wire, ensuring a firm connection. When the external wire is subjected to bending, torsional, or vibration stress from any direction, the stress is first transmitted to the connecting ring 11 and the fixing post 9, which in turn drives the dual-axis movable joint composed of the horizontal rotating arm 3 and the vertical rotating arm 5 to rotate accordingly (the horizontal rotating arm 3 rotates around the first hinge axis 6 and / or the vertical rotating arm 5 rotates around the second hinge axis 7). This design cleverly transforms the bending force that would originally act on the root of the wire connection and may cause fatigue fracture into the rotational motion of the movable joint, thereby effectively avoiding repeated plastic bending of the wire itself and fundamentally solving the problem of easy breakage at the terminal connection.

[0030] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A terminal block anti-bending connection structure, comprising a terminal ring (1), characterized in that: A connecting arm (2) is fixedly installed on one side of the terminal ring (1). A horizontal rotating arm (3) is provided on the upper part of the connecting arm (2). A first hinge shaft (6) is provided between the horizontal rotating arm (3) and the connecting arm (2). The horizontal rotating arm (3) is rotatably connected to the connecting arm (2) through the first hinge shaft (6). A fixed arm (4) is fixedly installed on the upper outer surface of the horizontal rotating arm (3) away from the first hinge shaft (6). A vertical rotating arm (5) is provided on one side of the fixed arm (4). A second hinge shaft (7) is provided between the vertical rotating arm (5) and the fixed arm (4). The vertical rotating arm (5) is rotatably connected to the fixed arm (4) through the second hinge shaft (7). A fixed column (9) is fixedly installed on the vertical rotating arm (5) away from the second hinge shaft (7). A connecting ring (11) is fixedly installed on the fixed column (9) away from the vertical rotating arm (5).

2. The terminal block anti-bending connection structure according to claim 1, characterized in that: The fixing post (9) and the connecting ring (11) are covered with a wire cap (8).

3. The terminal block anti-bending connection structure according to claim 2, characterized in that: The wire cap (8) has a wire hole (13) in the middle of the end away from the opening, and the wire hole (13) extends into the interior of the wire cap (8).

4. The terminal block anti-bending connection structure according to claim 3, characterized in that: The outer wall of the fixed column (9) is provided with an external thread (10), and the end of the inner cavity of the wire cap (8) away from the wire hole (13) is provided with an internal thread (14).

5. The terminal block anti-bending connection structure according to claim 4, characterized in that: The pressure cap (8) is connected to the external thread (10) on the outer wall of the fixing post (9) via the internal thread (14).

6. The terminal block anti-bending connection structure according to claim 5, characterized in that: The outer wall of the pressure cap (8) is provided with anti-slip texture (12).

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