High-reliability terminal fixing structure

Abstract

The utility model relates to a high-reliability terminal fixing structure, which comprises a terminal, a rubber shell, a shell, a clamping ring and a clamping spring, and is characterized in that the rubber shell is sleeved outside the terminal, and clamping groove groups are oppositely arranged on the terminal and the rubber shell; the clamping ring is arranged outside the rubber shell in a sleeving mode and provided with a boss set, and the boss set is clamped into the two clamping groove sets. The shell is sleeved outside the rubber shell and the clamping ring, and the clamping spring is clamped between the rubber shell and the shell. The high-voltage connector has the beneficial effects that the structure is simple, the design is reasonable, the fixing stability of the terminal is greatly improved, the overall size of the connector is reduced, the quality inspection difficulty is reduced, and meanwhile, the strict creepage distance and waterproof requirements of the high-voltage connector are met.

Description

Technical Field

[0001] This utility model relates to the field of high-current terminal assembly technology, specifically to a highly reliable terminal fixing structure. Background Technology

[0002] The fixing structure of high-current terminals has always been a key research focus in the high-voltage connector industry. Currently, the fixing structure of high-current terminals in metal connectors on the market is basically based on elastic clips. However, due to the structural characteristics of the elastic clips themselves, the adhesive material at the clip is relatively thin, making it prone to material shortages and defects. Since the elastic clips are located inside the adhesive core, it increases the difficulty of quality inspection. Once a clip is found to be dimensionally defective, it can be shipped to the customer, causing huge losses. Moreover, the elastic clip structure increases the overall diameter of the connector, forcing the overall size of the connector to increase. Utility Model Content

[0003] This invention provides a highly reliable terminal fixing structure, aiming to solve the problems in the prior art.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0005] A highly reliable terminal fixing structure includes a terminal, a rubber shell, an outer shell, a retaining ring, and a retaining spring. The rubber shell is fitted over the terminal, and the terminal and the rubber shell are provided with a set of retaining grooves facing each other. The retaining ring is fitted over the rubber shell and is provided with a set of bosses, which are engaged in two sets of retaining grooves. The outer shell is fitted over the rubber shell and the retaining ring, and the retaining spring is engaged between the rubber shell and the outer shell.

[0006] The beneficial effects of this utility model are as follows: During the assembly process, firstly, the terminal is inserted into the plastic shell until it stops; then, the retaining ring is placed on the outside of the plastic shell, and the boss assembly is respectively inserted into the two retaining groove assemblies, thereby restricting the degree of freedom of the terminal on its own axis; finally, the plastic shell is inserted into the outer shell until it stops, and at the same time, the retaining spring is inserted into the corresponding part to complete the assembly.

[0007] This utility model has a simple structure and reasonable design. This structure greatly increases the fixing stability of the terminals, reduces the overall size of the connector, reduces the difficulty of quality inspection, and at the same time meets the stringent creepage distance and waterproof requirements of high-voltage connectors.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the boss group includes at least one boss, which is distributed on the inner wall of the retaining ring; each of the slot groups includes at least one slot, and the boss can be engaged into the slot.

[0010] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. During assembly, the boss is used to engage with the two slots, thereby restricting the degree of freedom of the terminal on its own axis.

[0011] Furthermore, the boss group includes two bosses, which are spaced apart circumferentially along the retaining ring; each slot group includes two slots, which are spaced apart circumferentially along the terminal or the housing; the two bosses can be respectively engaged into the two pairs of slots.

[0012] The advantages of adopting the above-mentioned further solution are that the structure is simple, the shape design of the boss and the slot is reasonable, and the degree of freedom of the terminal on its own axis is further restricted.

[0013] Furthermore, each of the protrusions has an arc-shaped block structure, and each of the slots has an arc-shaped groove structure.

[0014] The advantages of adopting the above-mentioned further solution are that the structure is simple, and the shape design of the boss and the slot is reasonable to match the shape of the terminal.

[0015] Furthermore, the rubber shell is an insulating rubber shell, and the retaining ring is an insulating retaining ring.

[0016] The advantages of adopting the above-mentioned further solution are that the structure is simple, the design is reasonable, and both the housing and the retaining ring have insulating characteristics, ensuring the normal operation of the terminals.

[0017] Furthermore, it also includes an anti-touch plug, which is installed inside one end of the terminal.

[0018] The advantages of adopting the above-mentioned further solutions are that the structure is simple, the design is reasonable, and the assembly of the anti-touch plug is relatively convenient.

[0019] Furthermore, a sealing ring 2 is installed between the terminal and the housing.

[0020] The advantages of adopting the above-mentioned further solution are that the structure is simple, the design is reasonable, and the sealing ring 2 is used to increase the sealing between the terminal and the housing.

[0021] Furthermore, the terminal is provided with a mounting groove for mounting the sealing ring.

[0022] The advantages of adopting the above-mentioned further solution are that the structure is simple, the mounting groove is reasonably set, and it is convenient to assemble the sealing ring.

[0023] Furthermore, a sealing ring is installed between the outer shell and the rubber shell.

[0024] The advantages of adopting the above-mentioned further solution are that the structure is simple, the design is reasonable, and the sealing ring is used to increase the sealing between the outer shell and the rubber shell.

[0025] Furthermore, the housing is provided with a mounting groove for installing the sealing ring.

[0026] The advantages of adopting the above-mentioned further solution are that the structure is simple, the mounting groove is reasonably set, and it is convenient to assemble the sealing ring. Attached Figure Description

[0027] Figure 1 This is an assembly drawing of the present utility model;

[0028] Figure 2 This is a cross-sectional view of the present invention;

[0029] Figure 3 This is a partially exploded view of the present invention;

[0030] Figure 4 This is an exploded view of the present invention;

[0031] Figure 5 This is an exploded view of the rubber shell and retaining ring in this utility model;

[0032] Figure 6 This is an assembly drawing of the rubber shell, terminal and retaining ring in this utility model;

[0033] Figure 7 This is a schematic diagram of the retaining ring in this utility model.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1. Terminal; 2. Housing; 3. Outer shell; 4. Snap ring; 5. Snap spring; 6. Boss; 7. Snap groove; 8. Anti-touch plug; 9. Sealing ring two; 10. Sealing ring one. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0037] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] Example 1

[0041] like Figures 1 to 7 As shown, this embodiment provides a highly reliable terminal fixing structure, including a terminal 1, a housing 2, an outer shell 3, a retaining ring 4, and a retaining spring 5. The housing 2 is sleeved on the terminal 1, and the terminal 1 and the housing 2 are provided with corresponding slots. The retaining ring 4 is sleeved on the housing 2 and is provided with a boss assembly, which is engaged in the two slot assemblies. The outer shell 3 is sleeved on the housing 2 and the retaining ring 4, and the retaining spring 5 is engaged between the housing 2 and the outer shell 3.

[0042] During the assembly process, firstly, insert terminal 1 into housing 2 until it stops; then, place retaining ring 4 on housing 2 and insert the boss group into the two retaining slot groups respectively, thereby restricting the degree of freedom of the terminal on its own axis; finally, insert housing 2 into housing 3 until it stops, and at the same time, insert retaining spring 5 into the corresponding part to complete the assembly.

[0043] Preferably, in this embodiment, the terminal 1 is preferably cylindrical, the housing 2 is preferably cylindrical, and the housing 3 has a circular cavity that matches the shape of the housing 2.

[0044] In addition, the aforementioned outer casing 3 is preferably a metal casing.

[0045] This embodiment has a simple structure and a reasonable design. This structure greatly increases the stability of the terminal fixing, reduces the overall size of the connector, reduces the difficulty of quality inspection, and at the same time meets the stringent creepage distance and waterproof requirements of high-voltage connectors.

[0046] Example 2

[0047] Based on Embodiment 1, in this embodiment, the boss group includes at least one boss 6, which is distributed on the inner wall of the retaining ring 4; each of the slot groups includes at least one slot 7, and the boss 6 can be inserted into the slot 7.

[0048] The scheme has a simple structure and reasonable design. During assembly, the boss 6 and the two slots 7 are engaged to restrict the degree of freedom of the terminal 1 on its own axis.

[0049] Example 3

[0050] Based on Embodiment 2, in this embodiment, the boss group includes two bosses 6, which are distributed circumferentially along the retaining ring 4; each slot group includes two slots 7, which are distributed circumferentially along the terminal 1 or the housing 2; the two bosses 6 can be respectively inserted into the two pairs of slots 7.

[0051] The design is simple, with the boss 6 and the slot 7 having reasonable shapes, further restricting the degree of freedom of terminal 1 on its own axis.

[0052] Example 4

[0053] Based on any one of Embodiments 2 to 3, in this embodiment, each of the bosses 6 is an arc-shaped block structure, and each of the slots 7 is an arc-shaped groove structure.

[0054] The design is simple, with the boss 6 and the slot 7 designed to fit the shape of the terminal 1.

[0055] Example 5

[0056] Based on the above embodiments, in this embodiment, the rubber shell 2 is an insulating rubber shell, and the retaining ring 4 is an insulating retaining ring.

[0057] The solution has a simple structure and reasonable design. Both the housing 2 and the retaining ring 4 have insulating properties, which ensures the normal operation of terminal 1.

[0058] Preferably, in this embodiment, the retaining ring 4 is a plastic retaining ring.

[0059] Example 6

[0060] Based on the above embodiments, this embodiment also includes an anti-touch plug 8, which is installed inside one end of the terminal 1.

[0061] The solution has a simple structure and reasonable design, and the assembly of the anti-touch plug 8 is relatively convenient.

[0062] Preferably, in this embodiment, one end of the anti-touch plug 8 is threadedly connected to one end of the terminal 1.

[0063] Example 7

[0064] Based on the above embodiments, in this embodiment, a sealing ring 9 is installed between the terminal 1 and the housing 2.

[0065] The solution has a simple structure and a reasonable design, and uses sealing ring 29 to increase the sealing between terminal 1 and housing 2.

[0066] Example 8

[0067] Based on Embodiment 7, in this embodiment, the terminal 1 is provided with a mounting groove 2 for mounting the sealing ring 2 9.

[0068] The design is simple in structure, and the mounting groove is reasonably set to facilitate the assembly of the sealing ring 29.

[0069] Example 9

[0070] Based on the above embodiments, in this embodiment, a sealing ring 10 is installed between the outer shell 3 and the rubber shell 2.

[0071] The solution has a simple structure and a reasonable design, and uses a sealing ring 10 to increase the sealing between the outer shell 3 and the rubber shell 2.

[0072] Example 10

[0073] Based on Example 9, in this example, the housing 2 is provided with a mounting groove for installing the sealing ring 10.

[0074] The design is simple in structure and the mounting groove is reasonably designed to facilitate the assembly of the sealing ring 10.

[0075] The assembly process of this utility model is as follows:

[0076] First, install the second sealing ring onto the terminal, then insert it into the insulating housing until it reaches the stop position. Next, insert the plastic retaining ring into the retaining groove of the core from the side. Because the plastic retaining ring has a protruding boss, and both the core and the terminal are designed with retaining grooves, the plastic retaining ring can simultaneously hold the core and the terminal, thus restricting the freedom of the terminal axis. After assembling the terminal and the core, install the first sealing ring into the core groove, and then insert the entire core into the metal housing from the tail side until the metal housing and the mating surface of the core contact, i.e., it is inserted to the stop position. Then, install the retaining spring from the head side of the housing into the retaining spring groove of the core. After installation, the core and housing are fixed in the axial direction. Thus, all parts are installed, and the terminal and the core are firmly fixed relative to the metal housing.

[0077] The novel high-reliability terminal fixing structure proposed in this utility model has the following advantages:

[0078] First, the fixing method is more stable. The fixing method using a plastic retaining ring and spring in this utility model is more stable, and the terminal will not wobble axially or normally, nor will it easily become misaligned. Designers can arbitrarily increase the thickness of the retaining ring boss according to the insertion and extraction force of the terminal to increase the strength of the structure. In contrast, snap-fit ​​structures require a certain degree of elasticity in the snap, so the thickness of the material at the snap cannot be increased arbitrarily. Therefore, the snap is prone to breakage when subjected to force exceeding its tensile strength. This solution can completely avoid such situations.

[0079] Second, reduce the radial dimensions of components. Because the elastic snap-fit ​​mechanism in traditional snap-fit ​​structures requires a certain angle, the snap-fit ​​undergoes elastic deformation when the terminal is inserted, ultimately locking into the terminal. Therefore, the core of the snap-fit ​​structure often does not fit tightly against the terminal. Consequently, its dimensions are not as compact as this structure, which offers a significant size advantage in more compact connector applications.

[0080] Third, the structure of this utility model facilitates quality inspection. Traditional elastic snap-fit ​​structures and the rubber core are integrated, with the snap-fit ​​located inside the rubber core. This makes 100% dimensional inspection impossible, requiring random sampling after disassembly. Furthermore, the amount of rubber material at the snap-fit ​​is relatively small compared to the rest of the rubber core. In cases of injection molding instability, material shortages at the snap-fit ​​can lead to breakage during terminal mating. Because full inspection is not possible, defective products can easily reach customer sites, resulting in significant losses. This structure, composed of a plastic snap ring, terminals, and a rubber core, allows for easy quality inspection of each component. Therefore, 100% full inspection can be performed upon receipt, significantly reducing the probability of quality problems.

[0081] The present invention proposes a novel high-reliability terminal fixing structure, which can greatly increase the fixing stability of the terminal, reduce the overall size of the connector, reduce the difficulty of quality inspection, and at the same time meet the stringent creepage distance and waterproof requirements of high-voltage connectors.

[0082] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0083] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0084] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A terminal fixing structure with high reliability, characterized by: The utility model provides a terminal, including terminal (1), rubber shell (2), shell (3), snap ring (4) and snap spring (5), the rubber shell (2) is set outside the terminal (1), and the terminal (1) with the rubber shell (2) opposite is provided with card slot group;The snap ring (4) is set outside the rubber shell (2), and is provided with the boss group, the boss group is clamped into two card slot groups;The shell (3) is set outside the rubber shell (2) and the snap ring (4), and the snap spring (5) is clamped between the rubber shell (2) and the shell (3).

2. The highly reliable terminal fixing structure according to claim 1, characterized by: The boss group includes at least one boss (6), and the boss (6) is distributed on the inner wall of the snap ring (4);Each card slot group includes at least one card slot (7), and the boss (6) can be clamped into the card slot (7).

3. The highly reliable terminal fixing structure according to claim 2, characterized by: The boss group includes two bosses (6), and the two bosses (6) are distributed along the circumference of the snap ring (4);Each card slot group includes two card slots (7), and the two card slots (7) are distributed along the circumference of the terminal (1) or the rubber shell (2);Two bosses (6) can be clamped into two pairs of card slots (7) respectively.

4. The highly reliable terminal fixing structure according to claim 2, characterized by: Each boss (6) is in the form of an arc-shaped block, and each card slot (7) is in the form of an arc-shaped groove.

5. The high-reliability terminal fixing structure according to any one of claims 1 to 4, characterized by: The rubber shell (2) is an insulating rubber shell, and the snap ring (4) is an insulating snap ring.

6. The high-reliability terminal fixing structure according to any one of claims 1 to 4, characterized by: A touchproof plug (8) is installed in one end of the terminal (1).

7. The high-reliability terminal fixing structure according to any one of claims 1 to 4, characterized by: A second sealing ring (9) is installed between the terminal (1) and the rubber shell (2).

8. The high-reliability terminal fixing structure according to claim 7, characterized by: The terminal (1) is provided with a second mounting groove (9) for installing the second sealing ring (9).

9. The high-reliability terminal fixing structure according to any one of claims 1 to 4, characterized by: A first sealing ring (10) is installed between the shell (3) and the rubber shell (2).

10. The high-reliability terminal fixing structure according to claim 9, characterized by: The rubber shell (2) is provided with a first mounting groove (10) for installing the first sealing ring (10).

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