Crimping wiring terminal

Abstract

The crimping wiring terminal comprises a wiring end and a wire pressing end which are connected with each other, the wire pressing end is of a tubular structure allowing a cable to be inserted, the wire pressing end is sequentially provided with a transition section and an insulation fixing section in the cable insertion direction, and the inner diameter of the transition section is gradually increased from the wire pressing end to the insulation fixing section; the inner diameter of the insulation fixing section is consistent with the maximum inner diameter of the transition section, the wire pressing end is used for being connected to a wire core of a cable in a pressing mode, the insulation fixing section is used for being connected to an insulation sheath of the cable in a pressing mode, and an annular sealing piece is fixed to the end, away from the wire pressing end, of the insulation fixing section and is of a deformable sheet-shaped structure. The end part of the sealing sheet extends towards the axis of the wire pressing end and is used for abutting against an insulating sheath of the cable; in the crimping process, when the insulating fixed section crimps the insulating sheath, the sealing sheet is compressed in the radial direction and forms close contact with the insulating sheath, the gap is reduced, external moisture or corrosive gas is prevented from entering the wire crimping end through the sealing effect of the sealing sheet, and the risk of oxidation of the wire core is reduced.

Description

Technical Field

[0001] This application relates to the technical field of terminal blocks, and in particular to a crimp terminal block. Background Technology

[0002] Terminal blocks are key components for achieving reliable cable connections. Terminal blocks typically include a terminal block and a crimping terminal. When installing a terminal block, the wire core with the insulation stripped is inserted into the crimping terminal cylinder, and then a mold is used to perform radial crimping, which uses the plastic deformation of the cylinder to hold the wire core tightly.

[0003] However, the deformation generated during the crimping process makes it difficult for the crimping end to fit circumferentially against the outer wall of the cable. This inevitably results in gaps and cavities between the inner wall of the crimping end and the cable. In harsh environments such as humidity, salt spray, or industrial pollution, some gases containing moisture and corrosive media can enter the interior of the crimping end through these gaps, accelerating the oxidation rate of the wire core and resulting in a shorter overall product lifespan. Summary of the Invention

[0004] To improve the reliability of long-term electrical connection between the terminal block and the wire core, a crimp terminal block is provided.

[0005] The above-mentioned objective of this application is achieved through the following technical solution: A crimp terminal includes an interconnected terminal and a crimping end. The crimping end is a tubular structure for cable insertion. Along the cable insertion direction, the crimping end has a transition section and an insulation fixing section. The inner diameter of the transition section gradually increases from the crimping end to the insulation fixing section. The inner diameter of the insulation fixing section is the same as the maximum inner diameter of the transition section. The crimping end is used to crimp the cable core, and the insulation fixing section is used to crimp the cable insulation sheath. An annular sealing plate is fixed to the end of the insulation fixing section away from the crimping end. The sealing plate is a deformable sheet structure, and its end extends towards the axis of the crimping end to abut against the cable insulation sheath.

[0006] By adopting the above technical solution, when the cable is inserted, the sealing plate first abuts against the wire core and then against the insulation sheath, which plays a physical role in preventing the wire core from moving before crimping. During the crimping process, when the insulation fixing section crimps the insulation sheath, the sealing plate is radially compressed, forming a tight contact with the insulation sheath and reducing the gap. Through the sealing effect of the sealing plate, external moisture or corrosive gases are prevented from entering the crimping end, thereby reducing the risk of wire core oxidation and improving the long-term connection reliability of the terminal block.

[0007] Preferably, the sealing sheet is fixedly connected with retaining teeth on the side facing the insulating outer sheath.

[0008] By adopting the above technical solution, when crimping the insulation fixing section, the locking teeth are inserted into the surface of the insulation outer skin, which increases the mechanical interlocking force, forms an anchoring effect, enhances the connection stability between the sealing sheet and the insulation outer skin, prevents relative slippage, and at the same time, the locking teeth form an additional barrier between the insulation outer skin and the insulation fixing section, further blocking the gas permeation path and improving the sealing performance and vibration resistance.

[0009] Preferably, it further includes a non-deformable crimping piece, wherein the two ends of the crimping piece are respectively provided with parallel wire core crimping parts and insulation crimping parts. The wire core crimping parts are fixedly connected to the inner wall of the crimping end and are used to crimp the wire core of the cable. The insulation crimping parts are located between the insulation fixing section and the insulation outer sheath and are used to crimp the insulation outer sheath of the cable.

[0010] By adopting the above technical solution, when crimping the wire end, the wire core crimping part radially crimps the wire core, while the insulation crimping part simultaneously crimps the insulation sheath; the non-deformable characteristics of the crimping plate ensure uniform pressure transmission, and can process the wire core and insulation sheath simultaneously in one crimping action. The pre-pressing of the insulation crimping part pre-fixes the insulation sheath, reducing the risk of displacement when crimping the insulation fixing section later, thereby improving connection consistency and sealing effect.

[0011] Preferably, there are several crimping sheets arranged along the circumferential direction of the crimping end, and the end of the insulating crimping part away from the wire core crimping part extends to the space between the sealing sheet and the inner wall of the insulating fixing section.

[0012] By adopting the above technical solution, the end of the sealing sheet will abut against the surface of the insulation outer sheath and be squeezed into a ring-shaped structure after the cable is inserted. When the wire end is crimped for the first time, several insulation crimping parts simultaneously press against the end of the sealing sheet, so that the sealing sheet is radially squeezed to form a protrusion in the gap area between two adjacent parts that are not directly covered by the crimping sheet. When the insulation fixing section is crimped for the second time, the overall plastic deformation of the insulation fixing section will apply a continuous and uniform radial pressure, further flattening the initially formed protrusion and reducing the risk of introducing new leakage points due to the crimping process itself.

[0013] Preferably, the gap between the wire core crimping portion and the wire core is the same as the gap between the insulation crimping portion and the insulation sheath.

[0014] By adopting the above technical solution, when the core crimping part presses against the surface of the core, the insulation crimping part will simultaneously press against the surface of the insulation sheath, ensuring that when the core crimping part applies pressure to the core, the insulation crimping part can also apply pressure to the insulation sheath, ensuring that the core crimping part and the insulation crimping part can move synchronously during the crimping process.

[0015] Preferably, the length of the wire core crimping portion that abuts against the wire core is greater than the axial length of the crimping end.

[0016] By adopting the above technical solution, the contact area between the wire core crimping part and the wire core is increased during crimping, providing a longer conductive path and enhancing the stability of the electrical connection.

[0017] Preferably, the crimping tab includes a connecting portion perpendicular to the insulating crimping portion and the wire core crimping portion, for limiting the end of the insulating outer sheath.

[0018] By adopting the above technical solution, it is ensured that the insulation sheath comes into contact with the specially designed insulation crimping part at the initial stage of crimping. If the connecting part is not perpendicular to the insulation crimping part and the wire core crimping part, it will abut against the connecting part in advance. Therefore, the risk of radial blocking force caused by premature contact with the connecting part is avoided, so that the crimping force applied to the wire core crimping part can be synchronously converted into the clamping force of the insulation crimping part on the insulation sheath, realizing the synchronous crimping of the wire core and the insulation sheath.

[0019] Preferably, the end of the sealing sheet away from the insulating outer sheath is fixed to the end section of the insulating fixing section.

[0020] By adopting the above technical solution, one end of the sealing sheet will abut against the surface of the insulation sheath after the cable is inserted and form an annular sheet structure. The sealing sheet uses the end away from the insulation sheath as a fulcrum, so that the sealing sheet can form a covering effect between the insulation fixing section and the insulation sheath, and can stably adhere to the surface of the insulation sheath, forming a smooth sealing skirt that transitions from the end face of the insulation fixing section to the cable sheath.

[0021] In summary, this application has at least the following beneficial effects: 1. By utilizing the integrally molded crimping end, transition section, and insulation fixing section, along with a deformable annular sealing sheet, an effective physical barrier is constructed. After the cable is inserted, the sealing sheet adheres to the insulation outer sheath. During the crimping process, the sealing sheet is radially compressed, filling the gap between the insulation fixing section and the insulation outer sheath, preventing the intrusion of external corrosive media such as moisture, and reducing the risk of oxidation of the internal wire core. 2. By setting a rigid crimping plate with a core crimping part and an insulation crimping part, crimping force is applied to the core and insulation sheath simultaneously in one crimping action. The first crimping is performed by crimping the core through the crimping end and the core crimping part, and the core crimping part simultaneously drives the insulation crimping part to crimp the insulation sheath. The insulation crimping part will cause the sealing plate to deform locally and have micro protrusions. When the insulation fixing section is crimped for the second time, the insulation fixing section will apply inward radial pressure to the insulation crimping part and flatten the micro protrusions formed by the sealing plate in the first crimping, so that the sealing plate and the insulation sheath can be seamlessly fitted around the entire circumference, minimizing the risk of leakage points that may be introduced by the crimping process itself. Attached Figure Description

[0022] Figure 1 A three-dimensional structural diagram showing the connection between the terminal block and the cable; Figure 2 Cross-sectional view of the connection between the terminal block and the cable. Figure 1 ; Figure 3 for Figure 2 A magnified view of a portion at point A.

[0023] Figure 4 Cross-sectional view of the connection between the terminal block and the wiring. Figure 2 .

[0024] Reference numerals: 1. Terminal; 2. Crimping terminal; 3. Cable; 31. Insulation sheath; 32. Wire core; 4. Transition section; 5. Insulation fixing section; 6. Sealing plate; 61. Clamping tooth; 7. Crimping plate; 71. Wire core crimping part; 72. Insulation crimping part; 73. Connecting part. Detailed Implementation

[0025] The following section provides a more detailed description, in conjunction with the accompanying diagrams: As attached Figure 1 and attached Figure 2 As shown, a crimp terminal includes a terminal 1 and a crimping terminal 2 connected to each other. The terminal 1 is in the shape of a sheet and is used to connect with other components. The crimping terminal 2 is in the shape of a tubular structure and is used to insert a cable 3. The cable 3 includes an insulating sheath 31 and a wire core 32 located inside the insulating sheath 31. The terminal 1 and the crimping terminal 2 are integrally formed to form a complete terminal.

[0026] A transition section 4 and an insulation fixing section 5 extend sequentially from the side of the crimping terminal 2 away from the terminal 1. The crimping terminal 2, the transition section 4, and the insulation fixing section 5 are integrally formed and connected. The transition section 4 is located between the insulation fixing section 5 and the crimping terminal 2. The insulation fixing section 5 has a tubular structure, and the inner diameter of the transition section 4 gradually increases from the crimping terminal 2 toward the insulation fixing section 5. The transition section 4 is trumpet-shaped. The minimum inner diameter of the transition section 4 is the same as the inner diameter of the crimping terminal 2. The crimping terminal 2 is used for the insertion of the wire core 32 and is used to crimp the wire core 32 of the cable 3. The maximum inner diameter of the transition section 4 is the same as the inner diameter of the insulation fixing section 5. The insulation fixing section 5 is used for the insertion of the insulation sheath 31 and is used to crimp the insulation sheath 31 of the cable 3.

[0027] As attached Figure 2 and attached Figure 3As shown, an annular sealing plate 6 is provided at the end of the insulating fixing section 5 away from the wire clamping end 2. The sealing plate 6 is a flexible and easily deformable structure, made of a rigid material, and is inclined towards the interior of the insulating fixing section 5. One end of the sealing plate 6 is integrally formed and connected to the cross-section of the end of the insulating fixing section 5, and the other end of the sealing plate 6 is located inside the insulating fixing section 5 and extends towards the axis of the insulating fixing section 5. When the cable 3 is inserted into the wire clamping end 2, the end of the sealing plate 6 extending towards the axis of the insulating fixing section 5 will press against the wire core 32 and the insulation sheath 31 in sequence and undergo elastic deformation. Finally, the end of the sealing plate 6 extending towards the axis of the insulating fixing section 5 will form an annular sheet structure under the pressure of the insulation sheath 31. The sealing plate 6 can form a covering effect between the insulating fixing section 5 and the insulation sheath 31, fill the gap between the two and play a sealing role, and can also form a backstop effect on the insulation sheath 31.

[0028] A number of locking teeth 61 are fixedly connected to the side of the sealing sheet 6 facing the insulating outer skin 31. The locking teeth 61 are distributed along the circumferential direction of the sealing sheet 6, and the end of each locking tooth 61 is a sharp point. When the operator presses the insulating fixing section 5, the two sides of the sealing sheet 6 abut against the inner wall of the insulating fixing section 5 and the outer wall of the insulating outer skin 31, respectively. The sharp points of the locking teeth 61 can be embedded in the surface of the insulating outer skin 31, increasing the mechanical interlocking force and forming an additional barrier between the insulating outer skin 31 and the insulating fixing section 5, further blocking the gas permeation path.

[0029] As attached Figure 3 and attached Figure 4 As shown, a crimping plate 7 is provided between the inner wall of the crimping end 2 and the outer wall of the cable 3. The crimping plate 7 is made of a rigid material that cannot be deformed. The crimping plate 7 has an arc-shaped sheet structure. The crimping plate 7 includes a core crimping part 71, an insulation crimping part 72, and a connecting part 73 that connects the two. The core crimping part 71 and the insulation crimping part 72 are both arc-shaped sheet structures and are arranged in parallel.

[0030] The core crimping part 71 is fixedly connected to the inner wall of the crimping end 2. The core crimping part 71 is used to crimp the core 32 of the cable 3. The length of the core crimping part 71 abutting against the core 32 is greater than the axial length of the crimping end 2. The contact area between the core crimping part 71 and the core 32 is increased, providing a longer conductive path.

[0031] The insulating crimping part 72 is located between the insulating fixing section 5 and the insulating outer sheath 31. The insulating crimping part 72 is used to crimp the insulating outer sheath 31 of the cable 3, so that the insulating outer sheath 31 is tightly connected with the insulating fixing section 5. Furthermore, the gap between the core crimping part 71 and the core 32 is the same as the gap between the insulating crimping part 72 and the insulating outer sheath 31, ensuring that when the core crimping part 71 applies pressure to the core 32, the insulating crimping part 72 can also apply pressure to the insulating outer sheath 31, so that the core crimping part 71 and the insulating crimping part 72 can move synchronously.

[0032] Several crimping pieces 7 are provided here, arranged circumferentially along the crimping end 2, and the end of the insulating crimping part 72 away from the wire core crimping part 71 extends to the inner wall between the sealing plate 6 and the insulating fixing section 5. A gap is left between every two adjacent crimping pieces 7. When the crimping end 2 is crimped for the first time, several insulating crimping parts 72 simultaneously press against the end of the sealing plate 6, so that the outer wall of the sealing plate 6 is radially squeezed to form a protrusion in the gap area between two adjacent parts that are not covered by the crimping pieces 7. When the insulating fixing section 5 is crimped for the second time, the overall plastic deformation of the insulating fixing section 5 will apply an inward radial pressure, and the insulating fixing section 5 will radially squeeze the insulating crimping parts 72. The two ends of each insulating crimping part 72 will squeeze the protrusion formed in the first crimping and squeeze it into a flat sheet shape, reducing the risk of introducing new leakage points due to the crimping process itself.

[0033] The connecting part 73 is arranged perpendicularly to the core crimping part 71 and the insulation crimping part 72. As a result, the connecting part 73 will form a limiting block on the end of the insulation sheath 31. When the core crimping part 71 drives the insulation crimping part 72 to move synchronously, the connecting part 73 can slide on the end surface of the insulation sheath 31 instead of pressing against the end of the insulation sheath 31. This avoids the risk of premature contact with the connecting part 73 and the generation of radial blocking force. This allows the crimping force applied to the core crimping part 71 to be synchronously converted into the clamping force of the insulation crimping part 72 on the insulation sheath 31, so as to realize the synchronous crimping of the core 32 and the insulation sheath 31.

[0034] The implementation principle of this embodiment is as follows: When the cable 3 with part of the insulation sheath 31 removed is inserted into the crimping end 2 and the wire core 32 reaches the predetermined position, the first crimping is performed. The force of the first crimping is directly applied to the outer wall of the crimping end 2. Under the radial pressure of the mold, the crimping end 2 undergoes plastic deformation and shrinks inward. Several rigid crimping pieces 7 fixed on the inner wall of the crimping end 2 are driven synchronously, and the wire core crimping part 71 presses against the wire core 32 of the cable 3 to form an electrical connection. Due to the non-deformable nature of the rigid crimp connector, the pressure is synchronously transmitted to the insulating crimp portion 72 at its other end. The insulating crimp portion 72 presses against the end of the deformable sealing ring that is attached to the insulating outer skin 31. In the area between two adjacent insulating crimp portions 72, the soft deformable sealing ring is squeezed outward to form a local protrusion facing away from the insulating outer skin 31. After the first crimping is completed, the insulation fixing section 5 is crimped a second time. The insulation fixing section 5 undergoes plastic deformation and evenly tightens several insulation crimping parts 72. The insulation crimping parts 72 flatten the local protrusions formed in the first crimping, so that the entire inner ring of the deformable sealing ring is completely and seamlessly fitted with the surface of the cable 3 insulation sheath 31, reducing the risk of new gaps being generated during the second crimping process.

[0035] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection claimed in this application.

Claims

1. A crimping terminal comprising a wiring terminal (1) and a crimping terminal (2) connected to each other, the crimping terminal (2) being a tubular structure into which a cable (3) is inserted, characterized in that, The wire pressing end (2) is provided with a transition section (4) and an insulation fixing section (5) in sequence along the cable (3) insertion direction, the inner diameter of the transition section (4) gradually increases from the wire pressing end (2) to the insulation fixing section (5), the inner diameter of the insulation fixing section (5) is consistent with the maximum inner diameter of the transition section (4), the wire pressing end (2) is used for crimping the core (32) of the cable (3), the insulation fixing section (5) is used for crimping the insulation sheath (31) of the cable (3), one end of the insulation fixing section (5) away from the wire pressing end (2) is fixed with a ring-shaped sealing sheet (6), the sealing sheet (6) is a sheet structure capable of deforming, and the end of the sealing sheet (6) extends towards the axis of the wire pressing end (2) and is used for abutting against the insulation sheath (31) of the cable (3).

2. A crimped terminal according to claim 1, wherein The side of the sealing sheet (6) facing the insulation sheath (31) is fixedly connected with a clamping tooth (61).

3. A crimped terminal according to claim 1, wherein Further comprising a crimping sheet (7) incapable of deforming, both ends of the crimping sheet (7) are respectively provided with parallel core crimping portions (71) and insulation crimping portions (72), the core crimping portion (71) is fixedly connected with the inner wall of the wire pressing end (2) and is used for crimping the core (32) of the cable (3), the insulation crimping portion (72) is located between the insulation fixing section (5) and the insulation sheath (31) and is used for crimping the insulation sheath (31) of the cable (3).

4. A crimped terminal according to claim 3, wherein The number of the crimping sheet (7) is several, and the crimping sheet (7) is arranged along the circumferential direction of the wire pressing end (2), one end of the insulation crimping portion (72) away from the core crimping portion (71) extends to the space between the sealing sheet (6) and the inner wall of the insulation fixing section (5).

5. A crimped terminal according to claim 3, wherein The gap between the core crimping portion (71) and the core (32) is the same as the gap between the insulation crimping portion (72) and the insulation sheath (31).

6. A crimped terminal according to claim 3, wherein The length of the core crimping portion (71) abutting against the core (32) is greater than the length of the wire pressing end (2) in the axial direction.

7. A crimped terminal according to claim 3, wherein The crimping sheet comprises a connecting portion (73) perpendicular to the insulation crimping portion (72) and the core crimping portion (71), so as to limit the end of the insulation sheath (31).

8. The crimped terminal according to claim 1, characterized by One end of the sealing sheet (6) away from the insulation sheath (31) is fixed to the end section of the insulation fixing section (5).

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