Tail accessory dismounting structure and watertight connector

Abstract

The utility model discloses a tail accessory dismounting and mounting structure and a watertight connector. The tail accessory dismounting and mounting structure comprises a connecting sleeve and a locking sleeve, the rear end of the connecting sleeve is connected with the tail accessory, a split groove is formed in the front end of the connecting sleeve, and a protrusion is arranged on the inner wall of the connecting sleeve. The connecting sleeve is sleeved with the locking sleeve, and the front end of the locking sleeve is of a positioning structure; the watertight connector comprises a plug, a tail accessory and a tail accessory dismounting structure, the plug comprises a plug shell, a contact insulator and a contact, the contact insulator and the contact are installed in the plug shell, the tail accessory comprises a tail accessory shell, a watertight cable and an adapter, the rear end of the adapter and the watertight cable are arranged in the tail accessory shell in a compression joint mode, and the tail accessory dismounting structure is arranged in the tail accessory shell. And the adapter is connected with the rear end of the connecting sleeve. The tail accessory dismounting structure enables the tail accessory to be rapidly installed on the plug and firmly locked, space is saved, the tail accessory can be dismounted, the tail accessory dismounting structure and the tail accessory can be independently dismounted and replaced, use is convenient, and the structure is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, in particular to a tail accessory disassembly and assembly structure and a watertight connector. Background Art

[0002] like Figure 1 As shown in the figure, high-current watertight connectors mostly use copper busbar termination to achieve the connection and fixation between the connector and the tail accessories. When terminating, screws need to be tightened to achieve a firm fit between the two contact surfaces to achieve stable current transmission. For multi-core high-current connectors, each core contact needs to be tightened with screws when the copper busbar is terminated, which results in a small assembly space and poor operability. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a tail accessory disassembly and assembly structure and a watertight connector, which can quickly install the tail accessory on the connector and firmly lock it, and can be quickly disassembled as needed.

[0004] In order to achieve the above technical purpose, the technical scheme adopted is: a tail accessory disassembly and assembly structure, used between the contact insulator and the tail accessory, including a connecting sleeve and a locking sleeve; the connecting sleeve is a cylindrical structure with two ends open, the rear end of the connecting sleeve is connected to the tail accessory, and a split groove penetrating the wall thickness of the connecting sleeve is opened on the front end of the connecting sleeve, so that the front end port of the connecting sleeve forms a claw structure that can expand, and a protrusion is provided on the inner wall of the front end port of the connecting sleeve; the locking sleeve is movably sleeved on the outside of the connecting sleeve along the front and rear directions to The locking sleeve has a locking position and an unlocking position in its movable stroke, and a positioning structure is provided at the front end of the locking sleeve; when in the locking position, the protrusion is inserted into the outer slot of the contact insulator, and the locking sleeve is connected to the contact insulator through the positioning structure to limit the retreat of the locking sleeve, and the locking sleeve covers the front end of the connecting sleeve to limit the expansion of the claw structure; when moving from the locking position to the unlocking position, the locking sleeve is moved backward to expose the front end of the connecting sleeve to release the restriction on the claw structure, and then the connecting sleeve is pulled to make the protrusion of the connecting sleeve disengage from the outer slot to achieve separation.

[0005] Furthermore, the rear end of the connecting sleeve is welded or threadedly connected to the tail attachment.

[0006] Furthermore, the positioning structure of the locking sleeve is an interference fit structure or a threaded structure.

[0007] Furthermore, a boss is provided on the outer side of the rear end of the locking sleeve to facilitate the disassembly and assembly of the locking sleeve.

[0008] Furthermore, when the protrusion is inserted into the outer slot of the contact insulator, the outer diameter of the connecting sleeve is equal to the outer diameter of the contact insulator at the position of the slot.

[0009] Furthermore, the front end of the protrusion has a first chamfer.

[0010] Furthermore, the rear end of the protrusion has a second chamfer.

[0011] Furthermore, the connecting sleeve and / or locking sleeve is made of insulating material.

[0012] Furthermore, the connecting sleeve is integrally formed.

[0013] Furthermore, when the number of the splitting grooves is greater than two, the two splitting grooves are evenly distributed along the circumferential direction of the connecting sleeve.

[0014] A watertight connector comprises a plug, a tail accessory and a tail accessory disassembly and assembly structure, wherein the plug comprises a plug housing, a contact insulator and a contact, the contact insulator is installed in the plug housing, and the contact is installed on the contact insulator, the tail accessory comprises a tail accessory housing, a watertight cable and an adapter, the rear end of the adapter is connected to the watertight cable and arranged in the tail accessory housing, and the adapter is connected to the rear end of the connecting sleeve.

[0015] The beneficial effects of the utility model are:

[0016] 1. The tail accessory disassembly and assembly structure has a unique connection sleeve and locking sleeve structure, which can quickly install the tail accessory on the plug and lock it firmly, and can also remove the tail accessory. It is easy to install, quick to assemble, and highly operable. The tail accessory disassembly and assembly structure can also be disassembled and replaced separately from the tail accessory. It is easy to use and has a stable structure.

[0017] 2. A boss is added at the rear end of the locking sleeve. By operating the boss that is easy to bear force, the locking sleeve can be easily locked and disassembled in a small assembly space.

[0018] 3. Ensure that the diameter of the connecting sleeve after installation is equal to the outer diameter of the contact insulator at the installation position, which is convenient for the insertion of the locking sleeve, reduces the gap between the locking sleeve, the contact insulator and the connecting sleeve, and has a better sealing effect and a more stable structure.

[0019] 4. The front end of the protrusion is designed as the first chamfer, which can compensate for the expansion size of the front claw structure and can quickly expand and fit into the slot.

[0020] 5. The second chamfer at the rear end of the protrusion has a certain guiding effect, which makes it easier for the connecting sleeve to quickly expand and disengage from the slot when it is out of the slot.

[0021] 6. To ensure the insulation effect after connection, the tail accessory disassembly and assembly structure can be made of insulating material.

[0022] 7. The connecting sleeve is integrated to increase the overall strength of the tail accessory disassembly and assembly structure, making it easy to manufacture and low in cost.

[0023] 8. When the number of split grooves is greater than two, the split grooves can be evenly arranged to make the expansion force during installation and disassembly of the connecting sleeve more uniform.

[0024] 9. The watertight connector adopts the tail accessory disassembly and assembly structure to connect the contacts in the plug with the adapter. Without affecting the function of the watertight connector, the contacts and the adapter can be quickly installed and separated, saving space and also having a protective effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the prior art;

[0026] Figure 2 It is a schematic diagram of the use of the tail attachment disassembly and assembly structure of the utility model;

[0027] Figure 3 It is a structural schematic diagram of the connecting sleeve of the utility model;

[0028] Figure 4 It is a cross-sectional view of the connecting sleeve of the utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the watertight connector of the utility model before installation;

[0030] Figure 6 This is a schematic diagram of the structure of the watertight connector of the utility model after installation;

[0031] In the figure:

[0032] 1. Plug;

[0033] 101, plug housing, 102, contact insulator, 103, contact;

[0034] 102-1, card slot;

[0035] 2. Tail attachment;

[0036] 201, tail attached housing, 202, watertight cable, 203, adapter;

[0037] 3. Tail attachment disassembly and assembly structure;

[0038] 301, connecting sleeve, 302, locking sleeve;

[0039] 301-1, split groove, 301-2, protrusion, 301-3, thread, 302-1, positioning structure, 302-2, boss;

[0040] 301-21, first chamfer, 301-22, second chamfer;

[0041] 4. Copper busbar; 5. Screws. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0043] In the description of the present application, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0044] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, a conflicting connection, or an integral connection. A person of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0045] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0046] like Figure 1 As shown, a tail accessory disassembly structure is used for connection, installation and disassembly between the contact insulator 102 and the tail accessory 2. When in use, the structure can be used in connectors of various plug-in and adapter structures, not limited to single-core connectors and multi-core connectors, and the effect is more obvious when used in multi-core connectors.

[0047] A tail accessory disassembly and assembly structure includes a connecting sleeve 301 and a locking sleeve 302; the "front" of the connecting sleeve 301 and the locking sleeve 302 refers to the direction of insertion (installation), and the "rear" refers to the direction of separation (disassembly). The connecting sleeve 301 is a cylindrical structure with two ends open. The rear end of the connecting sleeve 301 is connected to the tail accessory 2. The connection form is not limited to a detachable connection or a non-detachable connection. A split groove 301-1 is provided on the front end of the connecting sleeve 301, which runs through the wall thickness of the connecting sleeve 301, so that the front end port of the connecting sleeve 301 forms a claw structure that can expand. The expansion refers to the connecting sleeve The front end port of 301 expands radially outward, that is, the claw structure is radially deformed under the action of external force. The number, direction, shape and size of the split groove 301-1 are not limited. The number of the split groove 301-1 is greater than 1, and the size of the split groove 301-1 can be parallel or non-parallel to the axis of the connecting sleeve 301. The shape of the split groove 301-1 only needs to be able to expand elastically. The size of the split groove 301-1 only needs to meet the requirements of the expansion and structural stability. The inner wall of the front end port of the connecting sleeve 301 is provided with protrusions 301-2 arranged at intervals or continuously in the circumferential direction, such as Figure 1 As shown in the figure, the protrusion 301-2 is continuous between two adjacent split grooves 301-1, and a discontinuous point structure can also be adopted; the locking sleeve 302 is movably sleeved on the outer side of the connecting sleeve 301 along the front-to-back direction, so that the locking sleeve 302 has a locking position and an unlocking position in the movable stroke, and the front end of the locking sleeve 302 is a positioning structure 302-1; in the locking position, the protrusion 301-2 is clamped into the outer side clamping groove 102-1 of the contact insulator 102 through the claw structure, and the clamping groove 102-1 can be an annular clamping groove for matching with the protrusion 301-2, or it can be a point-shaped clamping groove 102-1 corresponding to each protrusion 301-2, and the locking sleeve 302 is sleeved on The outer side of the connecting sleeve 301 and the contact insulator 102, the locking sleeve 302 is connected to the contact insulator 102 through the positioning structure 302-1 to limit the locking sleeve 302 from retreating, and the rear end of the locking sleeve 302 covers the front end of the connecting sleeve 301 to limit the expansion of the claw structure. The inner diameter size of the rear end is sufficient as long as it ensures that the protrusion 301-2 does not separate from the slot 102-1. When moving from the locked position to the unlocked position, the connection between the locking sleeve 302 and the contact insulator 102 is first released, and the locking sleeve 302 is moved backward to release the restriction on the claw structure, and the connecting sleeve 301 is pulled backward to make the protrusion 301-2 of the connecting sleeve 301 separate from the outer slot 102-1 to achieve separation.

[0048] The rear end of the connecting sleeve 301 is usually connected to the tail attachment 2 by welding or threading. When threaded connection is adopted, the rear end of the connecting sleeve 301 is provided with an internal thread or an external thread for connecting with the tail attachment 2. If the rear end of the connecting sleeve 301 adopts an internal thread, the docking tail attachment 2 has a matching external thread. If the rear end of the connecting sleeve 301 adopts an external thread, the docking tail attachment 2 has a matching internal thread. When a detachable connection is adopted, the connecting sleeve 301 installed on the tail attachment 2 can be replaced.

[0049] When the slot 102-1 is an annular slot, the connecting sleeve 301 can be rotatably inserted into the slot 102-1 without being restricted by an angle. When the slot 102-1 is a dot-shaped slot, the connecting sleeve 301 can be inserted into the slot 102-1 at a specific angle to prevent rotation. The two types of slots 102-1 can be selected according to working conditions.

[0050] Specific usage process: Figure 1 As shown, the threaded end (rear end) of the connecting sleeve is connected to the tail attachment as a whole, and the 4-petal claw structure at the front end of the figure expands and slides into the slot of the contact insulator 102 (see Figure ②), and then the locking sleeve is pushed forward from the unlocking position (see Figure ③), so that the locking sleeve moves forward and covers the front end claw structure of the connecting sleeve, and the locking sleeve 302 and the contact insulator 102 are fixed by threaded connection to prevent the locking sleeve from retreating (see Figure ④). At this time, the locking sleeve reaches the locking position. Other embodiments may adopt other positioning structures, not limited to threads, thereby limiting the expansion of the claw structure and preventing the connecting sleeve 301 from coming out of the slot 102-1; the process is opposite during separation, first moving the locking sleeve 302 to the rear side to release the restriction on the claw structure, and then pulling the connecting sleeve 301 backward to achieve separation.

[0051] The positioning structure 302-1 of the locking sleeve 302 is an interference fit structure or a threaded structure. The optimal structure is a threaded structure. An external thread is provided on the outer circumferential surface of the contact insulator 102, and a matching internal thread is provided on the inner wall of the front end of the locking sleeve 302. When the positioning structure 302-1 is an interference fit structure, the interference fit structure is a convex bump provided on the inner wall of the front end of the locking sleeve. Correspondingly, a concave pit that matches the convex bump is provided on the outer circumferential surface of the contact insulator 102. The convex bump and the concave pit are blocked and matched in the front-back direction to prevent the locking sleeve from retreating. Of course, the positions of the convex bump and the concave pit can be interchanged.

[0052] like Figure 1 As shown, the outer side of the rear end of the locking sleeve is provided with a boss 302-2 for facilitating the disassembly and assembly of the locking sleeve 302. For the positioning structure 302-1, the boss 302-2 pushes the tail to better install and apply force, and when pulling, the boss 302-2 is pulled or rotated to better apply force for disassembly.

[0053] like Figure 1 As shown, when the protrusion 301-2 is inserted into the outer slot 102-1 of the contact insulator 102, the outer diameter of the connecting sleeve 301 is equal to the outer diameter of the contact insulator 102 at the position of the slot 102-1, so that the connecting sleeve 301 and the contact insulator 102 form an equal diameter surface, which facilitates the molding and insertion of the locking sleeve 302, so that the locking sleeve 302 ensures that the connecting sleeve 301 and the contact insulator 102 are firmly connected without shaking or deviation.

[0054] like Figure 4 As shown, the front end of the protrusion 301-2 has a first chamfer 301-21, which contacts the contact insulator 102 with a large diameter first, has an excellent docking guide effect, is conducive to guiding the claw structure to expand, and reduces the expansion size required by the claw structure. For further optimization, the end edge of the contact insulator 102 has a corresponding chamfer to further enhance the docking guide effect and prevent scratches. Further, the rear end of the protrusion 301-2 is designed as a second chamfer 301-22, which makes it easier to guide the claw structure to deform radially outward when pulling back to pull the protrusion 301-2 out of the slot 102-1. For further optimization, the rear side of the slot 102-1 can be set as an inclined surface inclined to the rear, which is more convenient for the protrusion 301-2 to be separated from the slot 102-1.

[0055] To achieve the insulation effect, the connecting sleeve 301 and / or the locking sleeve 302 are made of insulating materials, such as PEEK, POM, etc., but are not limited to the disclosed insulating materials. If the insulation effect is not required, the connecting sleeve 301 and the locking sleeve 302 can be made of metal materials.

[0056] The connecting sleeve 301 is integrally formed, which reduces the assembly process and the molding process, and the integral setting has higher strength. However, in other embodiments, it is not limited to that the front end and the rear end of the connecting sleeve 301 are separately formed and then welded.

[0057] When the number of the splitting grooves 301-1 is greater than two, the two splitting grooves 301-1 are evenly distributed along the circumferential direction of the connecting sleeve 301, such as Figure 3 As shown, there are four splitting grooves 301 - 1 , which are evenly distributed along the circumferential direction of the connecting sleeve 301 . With this arrangement, the elastic expansion force of each piece is the same, the expansion is even, and installation and disassembly are easier.

[0058] A watertight connector comprises a plug 1, a tail accessory 2 and any one of the tail accessory disassembly and assembly structures 3 in the above-mentioned embodiments, wherein the plug 1 and the tail accessory 2 are plug-in-matched, such as Figure 5As shown, the plug 1 includes a plug housing 101, a contact insulator 102 and a contact 103. The contact insulator 102 is installed in the plug housing 101, and the contact 103 is installed on the contact insulator 102. The contact 103 replaces the traditional copper bus 4. The tail accessory 2 includes a tail attachment housing 201, a watertight cable 202 and an adapter 203. The rear end of the adapter 203 is connected to the watertight cable 202 and arranged in the tail attachment housing 201. The adapter 203 is connected to the rear end of the connecting sleeve 301. The connection form is not limited to a detachable connection or a non-detachable connection. For example, welding or threaded connection is adopted. When threaded connection is adopted, the front end of the adapter 203 is provided with an external thread or an internal thread matching the rear end of the connecting sleeve 301. The inner diameter of the connecting sleeve 301 is larger than the outer diameter of the tail of the contact. After the contact 103 is inserted into the connecting sleeve 301, it is plugged with the adapter 203. The adapter 203 is used to cooperate with the contact 103 to achieve electrical connection. In this embodiment, the adapter 203 adopts an adapter jack, and its front end has a jack structure, and correspondingly, the rear end of the contact 103 is a pin structure that plugs and matches with the jack structure at the front end of the adapter jack. In other embodiments, the front end of the adapter 203 can also be provided with a pin structure, and in this case, the rear end of the contact 103 adopts a matching jack structure.

[0059] like Figure 5 , Figure 6 As shown, the adapter 203 is crimped with the watertight cable 202 and then vulcanized and formed into one body with the tail attachment housing 201 to form the tail attachment 2. One end of the connecting sleeve 301 is installed on the adapter 203 through threaded connection to become a part of the attachment. When the tail accessory 2 is installed on the plug 1, the adapter 203 on the tail accessory 2 first contacts and conducts with the tail of the connector contact 103. As the contact deepens, the claw structure of the connecting sleeve 301 touches the edge of the insulator and expands. When the adapter 203 is fully in contact with the tail of the contact 103, the protrusion 301-2 on the claw structure also slides completely into the slot 102-1 of the contact insulator 102. At this time, the locking sleeve 302 on the outside of the connecting sleeve 301 is pushed forward and flush with the threaded connection on the contact insulator 102, which limits the expansion of the claw of the connecting sleeve 301, so that the adapter 203 cannot be detached from the tail of the contact insulator 102, thereby ensuring the firm connection between the plug 1 and the tail accessory 2 and the stability of current transmission. When the accessory needs to be removed, first unlock the locking sleeve 302, pull the locking sleeve 302 backward to fully expose the claw structure, and then pull the entire tail accessory 2 backward so that the claw structure expands and disengages from the contact insulator 102, thereby achieving rapid separation of the tail accessory 2 from the plug 1.

[0060] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A tail accessory disassembly and assembly structure, used between a contact insulator (102) and a tail accessory (2), characterized in that: The invention comprises a connecting sleeve (301) and a locking sleeve (302); the connecting sleeve (301) is a cylindrical structure with two ends open, the rear end of the connecting sleeve (301) is connected to the tail attachment (2), the front end of the connecting sleeve (301) is provided with a split groove (301-1) penetrating the wall thickness of the connecting sleeve (301), so that the front end port of the connecting sleeve (301) forms a claw structure capable of expansion, and the inner wall of the front end port of the connecting sleeve (301) is provided with a protrusion (301-2); the locking sleeve (302) is movably sleeved on the outer side of the connecting sleeve (301) in the front-to-back direction, so that the locking sleeve (302) has a locking position and an unlocking position in the movable stroke, and the front end of the locking sleeve (302) is provided with a fixed When in the locking position, the protrusion (301-2) is inserted into the outer slot (102-1) of the contact insulator (102), and the locking sleeve is connected to the contact insulator (102) through the positioning structure (302-1) to limit the locking sleeve (302) from retreating, and the locking sleeve (302) covers the front end of the connecting sleeve (301) to limit the expansion of the claw structure; when moving from the locking position to the unlocking position, the locking sleeve (302) is moved backward to expose the front end of the connecting sleeve (301) to release the restriction on the claw structure, and then the connecting sleeve (301) is pulled to make the protrusion (301-2) of the connecting sleeve (301) disengage from the outer slot (102-1) to achieve separation.

2. A tail accessory disassembly and assembly structure as claimed in claim 1, characterized in that: The rear end of the connecting sleeve (301) is welded or threadedly connected to the tail attachment (2).

3. A tail accessory disassembly and assembly structure as claimed in claim 1, characterized in that: The positioning structure (302-1) of the locking sleeve (302) is an interference fit structure or a threaded structure.

4. A tail accessory disassembly and assembly structure as claimed in claim 1 or 3, characterized in that: A boss (302-2) is provided on the outer side of the rear end of the locking sleeve to facilitate the disassembly and assembly of the locking sleeve (302).

5. The tail attachment disassembly and assembly structure according to claim 1, characterized in that: When the protrusion (301-2) is inserted into the outer slot (102-1) of the contact insulator (102), the outer diameter of the connecting sleeve (301) is equal to the outer diameter of the contact insulator (102) at the location of the slot (102-1).

6. A tail attachment disassembly and assembly structure as claimed in claim 1, characterized in that: The front end of the protrusion (301-2) has a first chamfer (301-21).

7. A tail accessory disassembly and assembly structure as claimed in claim 1, characterized in that: The rear end of the protrusion (301-2) has a second chamfer (301-22).

8. The tail attachment disassembly and assembly structure according to claim 1, characterized in that: The connecting sleeve (301) and / or the locking sleeve (302) are made of insulating material.

9. The tail attachment disassembly and assembly structure according to claim 1, characterized in that: The connecting sleeve (301) is integrally formed.

10. The tail attachment disassembly and assembly structure according to claim 1, characterized in that: When the number of the splitting grooves (301-1) is greater than two, the two splitting grooves (301-1) are evenly distributed along the circumferential direction of the connecting sleeve (301).

11. A watertight connector, characterized in that: The invention comprises a plug (1) for plugging and matching, a tail accessory (2) and a tail accessory disassembly and assembly structure (3) as claimed in any one of claims 1 to 10, wherein the plug (1) comprises a plug housing (101), a contact insulator (102) and a contact (103), wherein the contact insulator (102) is installed in the plug housing (101), and the contact (103) is installed on the contact insulator (102), and the tail accessory (2) comprises a tail accessory housing (201), a watertight cable (202) and an adapter (203), wherein the rear end of the adapter (203) is connected to the watertight cable (202) and arranged in the tail accessory housing (201), and the adapter (203) is connected to the rear end of the connecting sleeve (301).

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