Patent Application
20250079726
The present application claims priority to CN patent application No. 2023223486911, filed on Aug. 31, 2023, which is hereby incorporated by reference in their entirety.
This disclosure relates to the field of electrical connectors, specifically to a piercing-type of motor terminal connector.
Piercing-type motor terminal connectors are connected to wires through soldering, riveting, or piercing methods. Particularly, the piercing connection method, which involves breaking the outer enamel coating of enameled wires to make direct contact with the metal inside, achieves one-time crimping and conductivity. This method is convenient, quick, time-saving, and labor-saving, and therefore widely adopted. Piercing-type connections are made by puncturing the enamel coating of enameled wires, establishing an electrical connection between the terminal and the conductor. Enameled wires consist of an outer enamel coating and an inner conductor. However, existing terminals primarily penetrate the enameled wire by using protruding teeth or blade-like cuts to insert into the wire, piercing through the enamel coating. Although these methods can puncture the enamel coating and block the enamel coating outside of the terminal, there are often residual enamel fragments that hinder the full insertion of the terminal into the wire, causing incomplete contact between the terminal and a conductor. Moreover, after piercing, the contact retention is insufficient, and the terminal is prone to unreliable electrical contact or failure due to vibration.
The objective of this utility is to provide a piercing-type motor terminal connector that satisfies piercing connections and enhances the reliability of the electrical connection between the terminal and the conductor.
To achieve the above objective, this utility adopts the following technical solution:
In some embodiments, The force-enhancing part on the first elastic arm is a third elastic arm extending from one end of the first clastic arm and bent to form, the third elastic arm and the first elastic arm establishing a sequential layering along the axial direction of the enameled wire; the force-enhancing part on the second elastic arm is a fourth elastic arm extending from one end of the second elastic arm and bent to form, the fourth elastic arm and the second elastic arm establishing a sequential layering along the axial direction of the enameled wire; the third elastic arm and the fourth elastic arm together enclose to form a secondary clamping groove capable of establishing an adjustable tension state based on the elasticity of the third elastic arm and the fourth elastic arm, whereby the secondary clamping groove and the main clamping groove forming a sequential wire-clamping relationship in the axial direction of the enameled wire.
In some embodiments, the third elastic arm and the fourth elastic arm are connected at the bottom of the secondary clamping groove; and in the connection area of the third elastic arm and the fourth elastic arm, a folded-back section extending towards the main body, with the extended end of the folded-back section overlapping onto the main body.
In some embodiments, a third serration is disposed on the third elastic arm at the entrance of the secondary clamping groove, and a fourth serration is disposed on the fourth elastic arm at the entrance of the secondary clamping groove, whereby the third serration and the fourth serration used to press and pierce the enamel of enameled wire, enabling the enameled wire to slide into the secondary clamping groove and be held by the third elastic arm and the fourth elastic arm, thereby forming an electrical connection.
In some embodiments, the force-enhancing part on the first elastic arm is a first elastic hole located within and passing through the first elastic arm, and the force-enhancing part on the second elastic arm is a second elastic hole located within and passing through the second elastic arm; the first elastic hole and the second elastic hole are elongated, and the holes extend parallel to the main clamping groove, where the first elastic hole and the second elastic hole symmetrically positioned referred by the central axis of the main clamping groove, and the corresponding edges of the first elastic hole and the second elastic hole being aligned with the bottom of the main clamping groove.
In some embodiments, the pin is of a fish-eye form, with an expansion section located inside the pin, where the expansion section is either a recess or a through-hole passing through the pin.
In some embodiments, there are two pins symmetrically arranged about the central axis of the main clamping groove.
The following description, in conjunction with the accompanying drawings, further explains the conception, specific structure, and technical effects of this utility model, to fully understand its objectives, features, and effects.
It should be noted that in the description of this disclosure, terms indicating direction or positional relationships such as “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer”, etc., are based on the directions or positional relationships shown in the drawings. These terms are used merely for convenience in description and do not imply that the described devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be considered as limiting to this disclosure. Moreover, terms like “first”, and “second” are used only for descriptive purposes and should not be construed as indicating or implying relative importance.
According to
In this embodiment, the board end are disposed with pins 2 for board connection. Preferably, the pins 2 are of a fish-eye form. As shown in the figures, there are two pins 2 symmetrically arranged about the central axis of the main clamping groove 5, providing multiple points for board connection, ensuring stable connection, and facilitating the crimping of the enameled wire by the main clamping groove 5. This embodiment also includes an expansion section 21 inside the pins 2. Preferably, this expansion section 21 is either a recess or a through-hole passing through the pin 2. As shown in
According to
Further, the third clastic arm 6 and the fourth elastic arm 7 are connected together at the bottom of the secondary clamping groove 8, and in the interconnected area of the third elastic arm 6 and the fourth elastic arm 7, there is a folded-back section 9 extending towards the main body 1. The extended end of this folded-back section 9 overlaps onto the main body 1, forming a continuous loop-like structure when viewed from the side, making the overall structure stable and resistant to deformation, thus increasing the clamping force of the first elastic arm 3 and the second elastic arm 4. In this embodiment, the structural forms of the third elastic arm 6 and the fourth elastic arm 7 are consistent with those of the first clastic arm 3 and the second clastic arm 4, allowing for complete overlap in the orthographic projection direction, which facilitates manufacturing and assembly. The terminal of this embodiment can be manufactured as an integrated structure by stamping, meeting the structural design requirements for high current. As shown in the figures, barbs 10 are also provided on the outer surfaces of the first elastic arm 3, the second elastic arm 4, the third elastic arm 6, and the fourth elastic arm 7. When the wiring end is inserted into the corresponding plastic case, the barbs 10 latch onto the plastic case, effectively preventing the terminal from retreating or falling out after being installed in the mounting groove of the plastic case, serving as anti-retreat and anti-fall features.
Furthermore, the third elastic arm 6 at the entrance of the secondary clamping groove 8 is equipped with a third serration 61, and the fourth clastic arm 7 at the entrance of the secondary clamping groove 8 is equipped with a fourth serration 71. The third serration 61 and the fourth serration 71 are used to press and pierce the enamel of the enameled wire, enabling the wire to slide into the secondary clamping groove 8 and be held by the third and fourth elastic arms, thereby forming an electrical connection. This structure not only satisfies the holding requirements but also further enhances the piercing and conducting connections, ensuring the effectiveness and stability of the electrical connections, and increases the contact area to meet the requirements of high current operation
Referring to
This utility model provides a motor terminal connector suitable for board-to-wire connections, with pins designed for easy board insertion. The wiring end features a first elastic arm and a second elastic arm, which together form a main clamping groove capable of establishing an adjustable tension state based on the elasticity of the first and second elastic arms. At the entrance of the main clamping groove, first and second serrations are placed, used for pressing and piercing the enamel of the enameled wire, allowing the wire to slide into the groove and be held by the first and second elastic arms, thus forming an electrical connection. This satisfies the requirements for piercing and installing enameled wires, achieving one-time crimping and conductivity, making installation time and labor-efficient. Simultaneously, force-enhancing parts are equipped on both the first and second elastic arms, which, when the enameled wire slides into the main clamping groove, increase the clamping force of the arms, further enhancing connection stability, preventing poor electrical contact between the terminal and the conductor due to vibrations, and improving performance.
Although the preferred specific embodiments of this utility model have been described in conjunction with the accompanying drawings, the utility model should not be limited to the exact structure and operation fully identical to the description and drawings. For those skilled in the art, logical analysis, reasoning, or limited experimentation can lead to many equivalent modifications and variations to the aforementioned embodiments without departing from the conception and scope of this utility model, and these modifications and variations should fall within the scope of protection demanded by this utility model.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2023223486911 | Aug 2023 | CN | national |
