Drum spring, terminal assembly and a charging base

Abstract

The utility model discloses a kind of drum springs, including annular base body and at least two spring leaves, the spring leaf extends along the annular base body axially, and at least along the annular base body one side circumferentially spaced distribution, the spring leaf is formed around and is inserted into cavity, the inserted cavity diameter gradually decreases from the annular base body connection one end to free end, the outer wall of the spring leaf near free end is equipped with the contact point protruding to drum spring axis direction, the drum spring of the utility model is set in the jack of plug-in terminal, with the outer wall of the opposite terminal abuts and is electrically connected, the spring leaf of drum spring has elasticity, play the role of reducing plug-in force, reducing wear, reducing temperature rise, the design of contact point increases the clamping force with the opposite terminal, so that conductivity is more stable.

Description

Technical Field

[0001] This utility model relates to the field of electrical connection technology, and more specifically, to a drum spring, a terminal assembly, and a charging socket. Background Technology

[0002] Currently, in the high-current transmission of new energy vehicles, in order to ensure reliable electrical connection between the mating terminals and the plug-in terminals, elastic springs are generally installed in the plug-in terminals. Existing springs are generally configured as connecting strips at both ends and a rectangular spring strip connected in the middle of the two connecting strips. The center of the spring strip protrudes towards the axis of the circular spring strip, and the protrusion contacts the mating terminal to conduct the circuit. In the high-current transmission of new energy vehicles, low temperature rise and small insertion and extraction force are generally required. However, the existing springs have insufficient clamping force when in contact and large insertion and extraction force, which cannot meet the increasingly high requirements for contact resistance and insertion and extraction force in high-current transmission. Utility Model Content

[0003] One objective of this invention is to provide a new technical solution for a drum spring, a terminal assembly, and a charging socket to meet the increasingly stringent requirements for contact resistance and insertion / removal force in high-current transmission.

[0004] According to a first aspect of the present invention, a drum spring is provided, comprising an annular base and at least two spring plates, the spring plates extending axially along the annular base and being circumferentially spaced at least on one side of the annular base; the spring plates surround to form a insertion cavity, the diameter of the insertion cavity gradually decreasing from the end connected to the annular base to the free end; the outer wall of the spring plate near the free end is provided with a contact point protruding in the direction of the drum spring axis.

[0005] Optionally, at least two reeds extend axially from both sides of the annular base.

[0006] Optionally, the free end of the insertion cavity has a flared structure.

[0007] Optionally, the surface of the contact located inside the insertion cavity is provided with a conductive and wear-resistant layer.

[0008] Optionally, the springs on both sides of the annular base are symmetrically arranged in the axial direction.

[0009] Optionally, the drum spring is formed by stamping and rolling a metal sheet.

[0010] This utility model also provides a terminal assembly for plugging into a mating terminal, including a plug-in terminal and any of the drum springs described above. The drum spring is disposed in the plug hole of the plug-in terminal, and the minimum inner diameter of the contact points abuts against and is electrically connected to the outer wall of the mating terminal.

[0011] Optionally, the outer wall of the annular base has a riveting hole, and the outer wall of the insertion hole is riveted to the annular base at the corresponding riveting hole by a riveting die.

[0012] This utility model also provides a charging base, including any of the drum springs and any of the terminal assemblies described above.

[0013] The beneficial effects of this utility model are as follows:

[0014] The drum spring of this invention includes an annular base and at least two spring sheets. The spring sheets extend axially along the annular base and are circumferentially spaced along at least one side of the annular base. The spring sheets surround to form a insertion cavity, the diameter of which gradually decreases from the end connected to the annular base to the free end. The outer wall of the spring sheet near the free end is provided with a contact point protruding towards the axis of the drum spring. The design of the contact point on the spring sheet increases the clamping force when it contacts the outer wall of the mating terminal, thereby improving the connection stability between the insertion terminal and the mating terminal. The design of the spring sheet also reduces insertion and extraction force, reduces wear, and reduces temperature rise. This drum spring meets the increasingly high requirements for contact resistance and insertion and extraction force in high current transmission.

[0015] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0017] Figure 1 This is a structural schematic diagram of the front view of the drum spring of this utility model;

[0018] Figure 2 This is a cross-sectional view of the terminal assembly of this utility model.

[0019] The diagram is marked as follows:

[0020] 10. Drum spring; 11. Annular base; 111. Riveting hole; 12. Spring leaf; 121. Contact point; 122. Trumpet-shaped structure; 20. Plug-in terminal; 21. Socket. Detailed Implementation

[0021] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0022] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0023] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0024] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0025] According to this utility model, a drum spring 10 is provided, such as... Figure 1 As shown, it includes an annular base 11 and at least two springs 12, the springs 12 extending axially along the annular base 11 and being circumferentially spaced at least on one side of the annular base; the springs 12 form a insertion cavity around the base, the diameter of the insertion cavity gradually decreasing from the end connected to the annular base 11 to the free end; the outer wall of the springs 12 near the free end is provided with a contact point 121 protruding in the direction of the axis of the drum spring 10.

[0026] Currently, in the high-current transmission of new energy vehicles, in order to ensure reliable electrical connection between the mating terminal and the socket 21 of the plug terminal 20, an elastic spring 12 is generally provided in the socket 21. The existing spring 12 is generally configured as a connecting strip at both ends and a rectangular spring strip connected in the middle of the two connecting strips. The middle of the spring strip protrudes towards the axis of the circular spring 12. The protrusion contacts the mating terminal and plays the role of conducting the circuit. In the high-current transmission of new energy vehicles, a low temperature rise and a small insertion and extraction force are generally required. However, the existing spring 12 has insufficient clamping force when in contact and a large insertion and extraction force, which cannot meet the increasingly high requirements for contact resistance and insertion and extraction force in high-current transmission.

[0027] The drum spring 10 of this utility model includes an annular base 11 and at least two spring plates 12. The spring plates 12 extend axially along the annular base 11 and are circumferentially spaced along at least one side of the annular base 11. The spring plates 12 form a plug-in cavity, and the diameter of the plug-in cavity gradually decreases from the end connected to the annular base 11 to the free end. The outer wall of the spring plate 12 near the free end is provided with a contact point 121 protruding in the direction of the axis of the drum spring 10. The design of the contact point 121 on the spring plate 12 increases the clamping force when it contacts the outer wall of the mating terminal, thereby improving the connection stability between the plug-in terminal 20 and the mating terminal. The design of the spring plate 12 also reduces the insertion and extraction force, reduces wear, and reduces temperature rise. This drum spring 10 meets the increasingly high requirements for contact resistance and insertion and extraction force in high current transmission.

[0028] In some embodiments, such as Figure 1As shown, at least two springs 12 extend axially from both sides of the annular base 11.

[0029] At least two springs 12 on both sides of the annular base 11 work together, which significantly improves the rigidity and load-bearing capacity of the overall structure compared to a single or unilateral spring 12 structure. It can withstand larger loads and also improves the stability of the connection between the drum spring 10 and the mating terminal.

[0030] In some embodiments, such as Figure 1 and Figure 2 As shown, the free end of the insertion cavity has a flared structure 122.

[0031] It plays a guiding role during the insertion of the mating terminal into the plug cavity.

[0032] In some embodiments, the surface of the contact 121 located inside the insertion cavity is provided with a conductive and wear-resistant layer.

[0033] The main functions of the conductive wear-resistant layer include enhancing the conductivity of the contacts 121 on the spring plate 12 of the drum spring 10, improving corrosion resistance, enhancing wear resistance, improving signal transmission quality, enhancing the electrical connection between the drum spring and the mating terminal, and extending the service life of the drum spring 10 itself.

[0034] In some embodiments, such as Figure 1 As shown, the spring plates 12 on both sides of the annular base 11 are symmetrically arranged in the axial direction.

[0035] The spring plates 12 on both sides of the annular base 11 are symmetrically arranged in the axial direction, which makes the clamping force more uniform during the clamping process between the spring plates 12 on both sides of the annular base and the mating terminal. It also ensures the concentricity of the mating terminal with the drum spring 10 and the plug-in terminal 20 after the mating terminal is inserted into the drum spring 10, avoids wear caused by eccentricity, and improves the stability of the connection between the drum spring 10 and the mating terminal.

[0036] In some embodiments, the drum spring 10 is formed by stamping and rolling a metal sheet.

[0037] The stamped and rolled drum spring 10 is low in cost and suitable for mass production. Many identical parts can be manufactured at once, ensuring the quality standard of the drum spring 10.

[0038] This utility model also provides a terminal assembly for insertion with mating terminals, including a insertion terminal 20 and any of the drum springs 10 described above, wherein the drum spring 10 is disposed within the insertion hole 21 of the insertion terminal 20 (e.g., Figure 2 As shown), the minimum inner diameter of contact 121 abuts against and is electrically connected to the outer wall of the mating terminal.

[0039] The contact 121 on the spring 12 abuts against and is electrically connected to the outer wall of the mating terminal at the minimum inner diameter, which increases the clamping force and improves the connection stability between the plug terminal 20 and the mating terminal, meeting the increasingly higher requirements for contact resistance and insertion / extraction force in high current transmission.

[0040] In some embodiments, such as Figure 2 As shown, the outer wall of the annular base 11 has a riveting hole 111, and the outer wall of the insertion hole 21 is riveted to the annular base 11 through a riveting die corresponding to the riveting hole 111.

[0041] The riveted connection between the drum spring 10 and the plug terminal 20 has high strength and stability, and good impact and vibration resistance. This ensures the overall connection strength of the mating terminal and the plug terminal 20 through the drum spring 10, and ensures the electrical safety and stability during the use of the terminal assembly.

[0042] This utility model also provides a charging base, including any of the drum springs 10 and any of the terminal assemblies described above.

[0043] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A drum spring, comprising an annular base and at least two reeds, characterized in that: The reeds extend axially along the annular base and are distributed circumferentially at least on one side of the annular base; The reed forms a insertion cavity, the diameter of which gradually decreases from the end connected to the annular base to the free end; The outer wall of the reed near its free end is provided with a contact point that protrudes in the direction of the spring axis.

2. The drum spring according to claim 1, characterized in that: At least two reeds extend axially from both sides of the annular base.

3. The drum spring according to claim 2, characterized in that: The free end of the insertion cavity has a flared structure.

4. The drum spring according to claim 1, characterized in that, The contact point is located on the surface inside the insertion cavity and is provided with a conductive and wear-resistant layer.

5. The drum spring according to claim 2, characterized in that: The springs on both sides of the annular base are symmetrically arranged in the axial direction.

6. The drum spring according to claim 5, characterized in that, The drum spring is made by stamping and rolling a metal sheet.

7. A terminal assembly for mating with a mating terminal, characterized in that, It includes a plug-in terminal and a drum spring as described in any one of claims 1-6, wherein the drum spring is disposed within the plug hole of the plug-in terminal, and the minimum inner diameter of the contact point abuts against and is electrically connected to the outer wall of the mating terminal.

8. The terminal assembly according to claim 7, characterized in that: The outer wall of the annular base has a riveting hole, and the outer wall of the insertion hole is riveted to the annular base at the riveting hole location by a riveting die.

9. A charging stand, characterized in that: It includes the drum spring as described in any one of claims 1-6 and the terminal assembly as described in any one of claims 7-8.

Images