Wire harness terminal
The three-point clamping structure of the main spring and the auxiliary spring, along with the protective shell design, solves the problem of fatigue in wire harness terminals, enhances connection reliability and stability, prevents poor contact, avoids safety hazards, and saves materials.
Patent Information
- Application Number
- CN202423007949.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-06
AI Technical Summary
Traditional wire harness terminals are prone to fatigue during long-term use, resulting in reduced contact area, poor contact, and unreliable connection, posing safety hazards.
Design a wire harness terminal that employs a three-point clamping structure of main and auxiliary spring contacts, combined with a protective shell and a check spring contact to prevent spring contact fatigue, and uses a substrate integrated plug to prevent misalignment connection.
It improves the reliability and stability of the connection between the wire harness terminals and pins, prevents spring fatigue, avoids poor contact and safety hazards, and saves materials.
Smart Images
Figure CN223680435U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of electric connector, concretely relates to a wiring harness terminal which is firm and not easy to fatigue. BACKGROUND
[0002] With the rapid development of new energy industry, the signal and power transmission demand between battery management system (Battery Management System, BMS for short) and battery module is increasing. In order to realize reliable electrical signal and power connection, BMS and battery module are connected through electric connector. Wiring harness terminal is an important part of electric connector, and the built-in spring piece of wiring harness terminal corresponds to the built-in pin of needle seat. When wiring harness terminal is connected with needle seat, pin and spring piece are closely attached, and the transmission of signal or power is completed. Such wiring harness terminal is widely used in the connection of battery pack and BMS due to its simple structure, convenient installation and high transmission efficiency.
[0003] However, the wiring harness terminal of the conventional electric connector has certain deficiencies when connecting the needle seat. Since the spring piece needs to bear the plugging operation in the long-term use process, and the wiring harness terminal is mostly used in the relatively bumpy vehicle environment, the material of the wiring harness terminal is easy to fatigue due to repeated mechanical stress, which leads to the decrease of spring elasticity or even failure. This will reduce the contact area of wiring harness terminal and pin, increase the contact resistance, and thus cause the phenomenon of poor contact, affecting the stability of signal transmission and the reliability of power supply. In addition, the firmness of the wiring harness terminal when connecting needs to be improved, and when the wiring harness terminal connects the needle seat, the phenomenon of terminal misconnection may occur, which has potential safety hazards such as overcurrent and short circuit. UTILITY MODEL CONTENTS
[0004] The utility model aims at solving the above-mentioned problems and provides a wiring harness terminal.
[0005] The utility model realizes the above-mentioned purposes through the following technical schemes:
[0006] A wire harness terminal comprises a plug for connecting a pin and a crimping piece arranged at one end of the plug, the plug comprises a protective shell, two bosses are formed by protruding a side wall of the protective shell inward, a main spring and a secondary spring are arranged oppositely inside the protective shell, the free end of the secondary spring is overlapped on the free end of the main spring, the main spring is used for abutting the pin on the bosses, the secondary spring is used for pressing the main spring, and the two bosses are respectively located on both sides of the free end of the main spring.
[0007] As a further optimization scheme of the utility model, the main spring and the secondary spring all have a tail part, a waist part and a head part, the head part of the main spring and the secondary spring is respectively the free end of the main spring and the secondary spring, and the tail part of the main spring and the secondary spring is respectively fixedly arranged at both ends of the protective shell.
[0008] As a further optimization scheme of the utility model, the head part of the main spring and the head part of the secondary spring are both arc-shaped, and the side of the head part of the main spring away from the head part of the secondary spring is provided with a protruding part.
[0009] As a further optimization scheme of the utility model, the other side wall of the protective shell is provided with an outwardly curved stopper, and the stopper is provided with a protruding rib.
[0010] As a further optimization scheme of the utility model, the wire harness terminal has two plugs and one substrate, and the two plugs are connected with the substrate through the crimping piece.
[0011] As a further optimization scheme of the utility model, the side of the protective shell away from the crimping piece is provided with a notch, and the side of the notch is provided with an anti-stupid part.
[0012] The utility model has the advantages of:
[0013] 1) the utility model is connected with the wire harness terminal, the plug is inserted into the corresponding needle holder, the pin on the needle holder is embedded between the main spring and the two bosses, the pin is clamped by three points, the free end of the main spring is constrained by the secondary spring, the reliability of the connection between the wire harness terminal and the pin is enhanced, the main spring is prevented from being tired in long-term use, and the contact stability of the wire harness terminal is improved.
[0014] 2)The utility model discloses two plugs are integrated on the same substrate, and set up the gap and the foolproof part in the plug end part, one plug connects the power cord, and the other plug connects the signal line, when connecting the wire harness terminal, can avoid the security hidden danger caused by terminal misplacement connection, and can save the material. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is the whole structure schematic diagram of the utility model;
[0016] Figure 2 It is the front view of the utility model;
[0017] Figure 3 It is the plan view of the utility model;
[0018] Figure 4 It is Figure 1 A-A section view of.
[0019] In the drawing: 1, plug;2, pressure joint;3, substrate;11, protective shell;12, boss;13, main elastic sheet;14, vice elastic sheet;15, stopper;16, convex rib;17, gap;18, foolproof part;131, tail part one;132, waist part one;133, head part one;134, convex point;141, tail part two;142, waist part two;143, head part two. DETAILED DESCRIPTION
[0020] The following further describes the present application in detail with reference to the drawings, and it is necessary to point out here that the following detailed description is only used for further illustrating the present application, and cannot be understood as limiting the scope of the present application, and the person skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.
[0021] EMBODIMENT
[0022] As Figures 1-4The embodiment shown relates to a wire harness terminal, which comprises a plug 1 for connecting a pin and a crimping piece 2 arranged at one end of the plug 1. The crimping piece 2 is designed with an opening on one side, and is used for connecting a wire harness. The wire harness terminal is particularly used for signal and power transmission between a battery management system (BMS) and a battery module. The plug 1 comprises a protective shell 11, two bosses 12 formed by inward protrusion of a side wall of the protective shell 11, a main spring piece 13 and a secondary spring piece 14 arranged oppositely inside the protective shell 11, and a free end of the secondary spring piece 14 overlapped on a free end of the main spring piece 13. The main spring piece 13 is used for abutting the pin against the bosses 12, and the secondary spring piece 14 is used for pressing the main spring piece 13. The two bosses 12 are respectively located on both sides of the free end of the main spring piece 13, and a gap for the pin to pass through is formed between the main spring piece 13 and the bosses 12. The fixed ends of the main spring piece 13 and the secondary spring piece 14 are respectively fixed to both ends of the protective shell 11, and the protective shell 11 surrounds the main spring piece 13 and the secondary spring piece 14, so as to protect and position the main spring piece 13 and the secondary spring piece 14. A socket corresponding to the plug 1 is arranged on a pin seat, and the shape of the socket corresponds to the shape of the protective shell 11.
[0023] When the wire harness terminal is connected with the corresponding pin seat, the plug 1 is inserted into the socket on the pin seat, and the protective shell 11 is inserted into the socket on the pin seat. At this time, the pin on the pin seat is embedded between the main spring piece 13 and the two bosses 12 inside the protective shell 11. The two bosses 12 and the main spring piece 13 clamp and fix the pin by three points, and the free end of the main spring piece 13 is constrained by the secondary spring piece 14, so as to improve the connection reliability between the wire harness terminal and the pin, prevent the main spring piece 13 from being tired in long-term use, improve the contact stability of the wire harness terminal, keep the contact area between the wire harness terminal and the pin unchanged, and make the wire harness terminal and the pin tightly adhere to each other, so as to avoid the poor contact of the electrical connector.
[0024] Please refer to Figure 4The main elastic piece 13 and the auxiliary elastic piece 14 each have a tail, a waist and a head. Specifically, the main elastic piece 13 has a tail 131, one side of which extends towards the compression piece 2 to form a waist 132, one side of which extends towards the compression piece 2 to form a head 133. The tail 131 is the fixed end of the main elastic piece 13, which is fixedly arranged on the inner wall of the protective shell 11. The head 133 is the free end of the main elastic piece 13, which is located between the two bosses 12. The auxiliary elastic piece 14 has a tail 141, one side of which extends away from the compression piece 2 to form a waist 142, one side of which extends away from the compression piece 2 to form a head 143. The tail 141 is the fixed end of the auxiliary elastic piece 14, which is fixedly arranged on the inner wall of the protective shell 11. The head 143 is the free end of the auxiliary elastic piece 14, which is located between the two bosses 12. The tail 131 and the tail 141 are respectively located at the two ends of the protective shell 11. The heads of the main elastic piece 13 and the auxiliary elastic piece 14 are each arc-shaped, and the head of the main elastic piece 13 is provided with a protruding portion on the side away from the head of the auxiliary elastic piece 14. The protruding portion is a protruding point 134, which can enhance the contact force and stability between the main elastic piece 13 and the pin.
[0025] Further, as shown in Figure 2 and Figure 3 , the other side wall of the protective shell 11 is provided with an outwardly curved stop piece 15, and the stop piece 15 is provided with a protruding rib 16. The stop piece 15 is preferably a check elastic piece for preventing the wire harness terminal from retreating. The fixed end of the check elastic piece is fixedly arranged on the side wall of the protective shell 11, and the free end of the check elastic piece is arranged away from the protective shell 11. During the process of inserting the protective shell 11 into the needle seat socket, the socket extrudes the free end of the check elastic piece towards the inside of the protective shell 11. After the wire harness terminal is connected with the socket, the free end of the check elastic piece resets. At this time, the socket on the needle seat can block the retreat of the check elastic piece, preventing the protective shell 11 from being separated from the needle seat. The protruding rib 16 strengthens the check elastic piece, improving the check effect of the check elastic piece.
[0026] Still further, the wire harness terminal has two plugs 1 and a substrate 3, and the substrate 3 is connected with the two plugs 1 through the compression piece 2. Please refer to Figure 2The side of the protective shell 11 away from the crimping piece 2 is provided with a notch 17, and the side of the notch 17 is provided with an anti-fooling part 18. The anti-fooling part 18 is preferably a protruding strip fixed to the end of the protective shell 11 away from the crimping piece 2, the end of the protruding strip is bent towards the outside of the protective shell 11, the protruding strip is relatively small in volume relative to the notch 17, and the material required for manufacturing the wiring harness terminal can be saved. The wiring harness terminal integrates two plugs 1 on the same substrate 3, and is provided with a notch 17 and an anti-fooling protruding strip at the end of the plug 1. One plug 1 is connected to a power line through the crimping piece 2 at one end, and the other plug 1 is connected to a signal line through the crimping piece 2 at one end, the two plugs 1 are used for power supply and signal transmission of the BMS, and the two plugs 1 are constructed in the same way. An anti-fooling opening corresponding to the shape of the protruding strip is arranged on the needle seat socket, so that the phenomenon of incorrect connection of the terminal can be prevented, and the safety hazards such as overcurrent and short circuit caused by incorrect connection of the terminal can be avoided.
[0027] The above-described embodiments only express several embodiments of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model.
Claims
1. A wiring harness terminal comprising a plug (1) for connecting a pin and a crimping piece (2) provided at one end of the plug (1), characterized in that: The plug (1) comprises a protective shell (11), two bosses (12) formed by inward protrusion of a side wall of the protective shell (11), a main elastic sheet (13) and a secondary elastic sheet (14) oppositely arranged inside the protective shell (11), and the free end of the secondary elastic sheet (14) is overlapped on the free end of the main elastic sheet (13), the main elastic sheet (13) is used for abutting the pin on the boss (12), and the secondary elastic sheet (14) is used for pressing the main elastic sheet (13), and the two bosses (12) are respectively located on both sides of the free end of the main elastic sheet (13).
2. A wiring harness terminal according to claim 1, characterized in that: The main elastic sheet (13) and the secondary elastic sheet (14) each have a tail part, a waist part and a head part, the head part of the main elastic sheet (13) and the secondary elastic sheet (14) is respectively the free end of the main elastic sheet (13) and the secondary elastic sheet (14), and the tail part of the main elastic sheet (13) and the secondary elastic sheet (14) is respectively fixed on both ends of the protective shell (11).
3. A wiring harness terminal according to claim 2, wherein: The head part of the main elastic sheet (13) and the secondary elastic sheet (14) is arc-shaped, and a convex part is arranged on the side of the head part of the main elastic sheet (13) away from the head part of the secondary elastic sheet (14).
4. A wiring harness terminal according to claim 1, characterized in that: An outwardly curved stopper (15) is arranged on the other side wall of the protective shell (11), and a convex rib (16) is arranged on the stopper (15).
5. A wiring harness terminal according to claim 1, wherein: The wire harness terminal has two plugs (1) and a substrate (3), and the substrate (3) is connected with the two plugs (1) through a crimping piece (2).
6. A wiring harness terminal according to claim 5, wherein: A notch (17) is arranged on the side of the protective shell (11) away from the crimping piece (2), and a foolproof part (18) is arranged on one side of the notch (17).