Wire sealing body assembly with combined structure and electric connector

Abstract

The utility model discloses a wire sealing body assembly of a combined structure and an electric connector. The wire sealing body assembly comprises an outer elastic sleeve and an inner wire sealing structure arranged in an inner cavity of the outer elastic sleeve. The internal wire sealing structure comprises a plurality of internal elastic half columns which are mutually independent; the internal elastic half column is provided with a splicing surface; the internal elastic half columns are spliced into a whole through the splicing surfaces; one or more semi-arc-shaped grooves are formed in the splicing surfaces of the internal elastic half columns; and the semi-arc-shaped grooves in the adjacent internal elastic half columns are encircled to form a threading hole. According to the internal wire sealing structure provided by the utility model, the plurality of internal elastic half columns are spliced to form the plurality of mutually independent threading holes, so that each cable corresponds to one threading hole with a matched size, the contact area between the wire sealing body and the cable is greatly increased, the stress on the cable is uniform, the cable is not easy to deform, and the locking force on the cable is increased.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of wiring structure, concretely relates to a combined structure's seal wire body subassembly and electric connector. BACKGROUND

[0002] The seal wire body locking part of the existing hose joint is a circular structure; the use mode of the seal wire body is as follows: firstly, the cable is passed through the center hole of the circular structure, and then in the process of tightening the joint, the circular locking part of the seal wire body is tightened inward, so as to realize the locking of the cable; however, the structure has the following three defects:

[0003] 1. The seal wire body and the cable only rely on two-point contact to compress the cable, the cable is unevenly stressed, is easily deformed, and the locking force on the cable is small.

[0004] 2. In order to ensure that the seal wire body can clamp the cable after being tightened, the gap between the cable and the side wall of the threading hole of the seal wire body is extremely small in the initial state, so that the difficulty of threading the cable into the seal wire body is increased, and if the cable has been pre-compressed with the terminal, the cable cannot be threaded into the seal wire body.

[0005] 3. The seal wire body still has risks with the cables after being locked, so that the protection performance of the electric connector, such as waterproof and dustproof, is poor. SUMMARY

[0006] The utility model aims at providing a combined structure's seal wire body subassembly and electric connector.

[0007] In the first aspect, the utility model provides a seal wire body subassembly, which comprises an external elastic sleeve and an internal seal wire structure arranged in the internal cavity of the external elastic sleeve; the internal seal wire structure comprises a plurality of independent internal elastic half columns; the internal elastic half columns are provided with splicing surfaces; the internal elastic half columns are spliced into a whole through the splicing surfaces; one or more semicircular recesses are formed on the splicing surfaces of the internal elastic half columns; the semicircular recesses on the adjacent internal elastic half columns are combined to form a threading hole.

[0008] Preferably, the outer side wall of the external elastic sleeve is provided with a stepped surface; the stepped surface of the outer side wall of the external elastic sleeve divides the external elastic sleeve into a small-diameter section and a large-diameter section.

[0009] Preferably, the outer side wall of the small-diameter section is provided with a protruding guide strip.

[0010] Preferably, the outer side surface of the internal seal wire structure and the inner side wall of the external elastic sleeve are provided with matched stepped surfaces; so as to provide axial limiting for the internal seal wire structure.

[0011] Preferably, the splicing surface of the internal elastic half-column is provided with a stepped structure; and the stepped structures on the splicing surfaces of the adjacent internal elastic half-columns are complementary in shape.

[0012] Preferably, the number of the internal elastic half-columns is two; the two internal elastic half-columns are identical in shape; and the stepped structure on the splicing surface of the internal elastic half-column comprises an inner recess structure and an outer convex structure respectively located on the two sides of the splicing surface.

[0013] In the second aspect, the utility model provides a kind of electric connector, it includes shell assembly and the sealing line body assembly of preceding;The shell assembly includes middle shell and locking connector;The middle shell is equipped with sealing line chamber;Locking connector is connected with the internal thread in middle shell;The inner end of sealing line chamber is equipped with convergence part;The convergence part is inclined plane structure;Cable passes through the threading hole in internal sealing line structure.

[0014] The small diameter section of the external elastic sleeve is located in the locking connector;The convergence part in middle shell and the end portion of locking connector respectively abut against the two ends of external elastic sleeve, so that external elastic sleeve is deformed and shrunk inward under the extrusion of convergence part, and locking cable.

[0015] Preferably, an axially extending sliding groove is formed on the inner side wall of the locking connector;The outer side wall of the small diameter section is provided with a raised guide strip;The raised guide strip on the external elastic sleeve and the sliding groove in the locking connector are matched and slidably connected.

[0016] Preferably, the shell assembly further includes an end nut;The end nut is threadedly connected with the end of the middle shell away from the locking connector.

[0017] Preferably, the inclined plane structure of the convergence part is frustum-shaped.

[0018] The utility model has the beneficial effects that:

[0019] 1. The internal sealing line structure of the utility model is formed by a plurality of internal elastic half-columns to form a plurality of independent threading holes, so that each cable corresponds to a size-matched threading hole, greatly increasing the contact area between the sealing line body and the cable, making the cable force evenly, not easy to deform, and increasing the locking force of the cable.

[0020] 2. The utility model is connected with the cable by the splicing mode of a plurality of internal elastic half-columns, avoiding the problem of difficult threading caused by small hole diameter, and still being able to conveniently install the sealing line body even if the terminal has been crimped on the cable.

[0021] 3. The threading hole in the utility model is closely combined with the cable after locking, which minimizes the gap and significantly improves the poor protection performance of the cable, such as waterproof and dustproof. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the explosion schematic view of the utility model.

[0023] Figure 2 It is the structure schematic view of the external elastic sleeve in the utility model.

[0024] Figure 3 It is the structure schematic view of the internal elastic half column in the utility model.

[0025] Figure 4 It is the cross section structure schematic view of the utility model.

[0026] Figure 5 It is the assembly flow schematic view of the utility model.

[0027] Reference signs: 1, external elastic sleeve;1-1, small diameter section;1-2, large diameter section;1-2-1, convex guide strip;2, internal elastic half column;2-1, half stepped cylindrical surface;2-2, splicing surface;2-3, semicircular groove;3, end nut;4, middle shell;4-1, connector cavity;4-2, sealing line cavity;4-3, separation ring;4-4, converging part;5, locking connector;6, cable. DETAILED DESCRIPTION

[0028] The utility model is further described below in combination with the drawings.

[0029] As shown in Figure 1 and Figure 2 , an electric connector based on a combined structure sealing line body assembly, comprising a shell assembly and a sealing line body assembly. The sealing line body assembly comprises an external elastic sleeve 1 and an internal sealing line structure capable of being loaded into the internal cavity of the external elastic sleeve 1. The external elastic sleeve 1 is in the shape of a hollow stepped shaft, and the stepped surface for limiting is arranged on the middle part of the outer sidewall and the inner sidewall of the external elastic sleeve 1. The stepped surface of the outer sidewall of the external elastic sleeve 1 separates the external elastic sleeve 1 into a small diameter section 1-1 and a large diameter section 1-2. A plurality of convex guide strips 1-2-1 are arranged on the outer sidewall of the small diameter section 1-1. The small diameter section 1-1 can realize the circumferential limiting of the sealing line body assembly in the shell assembly through the convex guide strips 1-2-1.

[0030] As shown in Figure 1 and Figure 3 , an electric connector based on a combined structure sealing line body assembly, comprising a shell assembly and a sealing line body assembly. The sealing line body assembly comprises an external elastic sleeve 1 and an internal sealing line structure capable of being loaded into the internal cavity of the external elastic sleeve 1. The external elastic sleeve 1 is in the shape of a hollow stepped shaft, and the stepped surface for limiting is arranged on the middle part of the outer sidewall and the inner sidewall of the external elastic sleeve 1. The stepped surface of the outer sidewall of the external elastic sleeve 1 separates the external elastic sleeve 1 into a small diameter section 1-1 and a large diameter section 1-2. A plurality of convex guide strips 1-2-1 are arranged on the outer sidewall of the small diameter section 1-1. The small diameter section 1-1 can realize the circumferential limiting of the sealing line body assembly in the shell assembly through the convex guide strips 1-2-1.As shown, the internal cable sealing structure comprises two independent and identical internal elastic half-cylinders 2. The side surface of the internal elastic half-cylinder 2 is divided into a stepped cylindrical surface and a joint surface 2-2. Two semicircular arc grooves 2-3 are arranged side by side on the joint surface 2-2 of the internal elastic half-cylinder 2. The longitudinal section of the semicircular arc groove 2-3 is semicircular, and the radius is equal to the outer diameter of the connected cable 6. The joint surfaces 2-2 of the two internal elastic half-cylinders 2 are overlapped to form a complete internal cable sealing structure. The outer side surface of the internal cable sealing structure is in the shape of a stepped shaft (i.e., a cylindrical surface with steps). The internal cable sealing structure forms two cable passing holes. The cable passing holes are formed by the corresponding semicircular arc grooves 2-3 of the two internal elastic half-cylinders 2.

[0031] In some embodiments, referring to Figure 3 , the two side edges of the joint surface 2-2 of the internal elastic half-cylinder 2 are in a complementary stepped structure. The stepped structure can lock the two internal elastic half-cylinders 2 in the axial direction after being jointed. Specifically, the internal elastic half-cylinder 2 is divided into a large-diameter part and a small-diameter part by the stepped surface on the stepped cylindrical surface; one side of the joint surface 2-2 of the internal elastic half-cylinder 2 protrudes outward, and the other side is recessed inward; the rest of the joint surface 2-2 of the internal elastic half-cylinder 2 is a flat surface.

[0032] The outer side surface of the internal cable sealing structure formed by jointing matches the shape of the inner side wall of the external elastic sleeve 1. The stepped surface of the inner side wall of the external elastic sleeve 1 cooperates with the stepped surface on the outer side surface of the internal cable sealing structure, so that the external elastic sleeve 1 provides axial limiting for the internal cable sealing structure inside itself.

[0033] As shown in Figure 1 and Figure 4 , the shell assembly comprises an end nut 3, a middle shell 4 and a locking joint 5 which are connected in sequence by threads. The middle shell 4 is provided with an insertion cavity 4-1 and a cable sealing cavity 4-2 arranged in the axial direction. The inner side wall of the middle shell 4 is integrally formed with a partition ring 4-3 between the insertion cavity 4-1 and the cable sealing cavity 4-2; the center hole of the partition ring 4-3 is used for passing through the cable 6. The end of the outer side surface of the middle shell 4 corresponding to the insertion cavity 4-1 is provided with an external thread; the external thread is screw-connected with the internal thread of the end nut 3. The end nut 3 is used for assembling and connecting with a corrugated tube for protecting the cable. The cable sealing cavity 4-2 of the middle shell 4 is provided with an internal thread; the internal thread is screw-connected with the external thread of the locking joint 5.

[0034] The connection between the partition ring 4-3 and the side wall of the insertion cavity 4-1 is provided with a converging part 4-4. The converging part 4-4 is in the shape of gradually reducing from the opening of the outer end of the insertion cavity 4-1, which is in the shape of a circular truncated cone in this embodiment, and is used for extruding the cable sealing body assembly to the center, so that the cable sealing body assembly clamps the cable 6 inside itself.

[0035] The inner diameter of the locking connector 5 matches the outer diameter of the small-diameter section 1-1 of the outer elastic sleeve 1. A plurality of axially extending sliding grooves are formed on the inner side wall of the locking connector 5. The protruding guide strips 1-2-1 on the outer elastic sleeve 1 are matched with the sliding grooves in the locking connector 5 and are in sliding connection, so that the locking connector 5 provides circumferential constraint on the outer elastic sleeve 1.

[0036] The inner diameter of the wire sealing cavity 4-2 in the middle shell 4 matches the outer diameter of the large-diameter section 1-2 of the outer elastic sleeve 1. The large-diameter section 1-2 of the outer elastic sleeve 1 is located between the converging portion 4-4 in the middle shell 4 and the end of the locking connector 5. The stepped surface on the outer side wall of the outer elastic sleeve 1 abuts against the end of the locking connector 5.

[0037] By rotating the locking connector 5 into the middle shell 4, the end of the locking connector 5 can extrude the large-diameter section 1-2 of the outer elastic sleeve 1, and the large-diameter section 1-2 of the outer elastic sleeve 1 is deformed radially inward under the pushing of the converging portion 4-4 in the locking connector 5, extruding the cable 6 in the wire sealing body assembly, so as to lock the cable 6.

[0038] The wire sealing body assembly in the embodiment fully fits the cable 6 and can provide greater locking force on the cable 6 than the traditional structure when locking. Moreover, no gap is left between the wire sealing body assembly and the cable 6, so that water can be isolated outside the wire sealing body, thereby ensuring the protection performance of the entire electrical connector.

[0039] In addition, in the embodiment, the wire sealing body assembly is designed in a three-separation manner by the outer elastic sleeve 1 and the two inner elastic half columns 2, so that the outer elastic sleeve 1 allows a central hole with a larger diameter, facilitating the penetration of the cable, even if the cable is crimped with a terminal.

[0040] The working principle of the utility model is as follows:

[0041] As shown in Figure 5 the end nut 3, the middle shell 4, the outer elastic sleeve 1, and the locking connector 5 are sequentially sleeved on the cable; then the two inner elastic half columns 2 are spliced to the position between the middle shell 4 and the outer elastic sleeve 1 on the cable. Then the outer elastic sleeve 1 is sleeved on the two spliced inner elastic half columns 2. Finally, the end nut 3, the locking connector 5, and the two ends of the middle shell 4 are respectively threadedly connected.

Claims

1. An encapsulant body assembly of a combination structure, characterized by: The utility model provides a kind of cable sealing body, including external elastic sleeve (1), and the internal sealing structure of being loaded into the internal cavity of external elastic sleeve (1);The internal sealing structure includes multiple independent internal elastic half columns (2);The internal elastic half column (2) is equipped with splicing surface (2-2);Each internal elastic half column (2) is spliced into whole by splicing surface (2-2);The splicing surface (2-2) of the internal elastic half column (2) is provided with one or more semicircular recess (2-3);The semicircular recess (2-3) on the adjacent internal elastic half column (2) is enclosed to form threading hole.

2. A combined structure seal land assembly according to claim 1, wherein: The outer side wall of the external elastic sleeve (1) is provided with a stepped surface;The stepped surface of the outer side wall of the external elastic sleeve (1) separates the external elastic sleeve (1) into a small-diameter section (1-1) and a large-diameter section (1-2).

3. A combined structure seal land assembly according to claim 1, wherein: The outer side wall of the small-diameter section (1-1) is provided with a protruding guide strip (1-2-1).

4. The combined structure seal land assembly of claim 1, wherein: The outer side of the internal sealing structure and the inner side wall of the external elastic sleeve (1) are provided with mutually matching stepped surfaces.

5. The combined structure seal land assembly of claim 1, wherein: The splicing surface (2-2) of the internal elastic half column (2) is provided with a stepped structure;The stepped structures on the splicing surfaces (2-2) of the adjacent internal elastic half columns (2) are complementary in shape.

6. A combined structure seal land assembly according to claim 5, wherein: The number of the internal elastic half columns (2) is two;The two internal elastic half columns (2) are identical in shape;The stepped structure on the splicing surface of the internal elastic half column (2) includes an inner recess structure and an outer protruding structure located on both sides of the splicing surface respectively.

7. An electrical connector comprising a housing assembly; characterized by: The utility model also relates to a cable sealing body assembly, which comprises the cable sealing body of claim 2 and a shell assembly;The shell assembly comprises a middle shell (4) and a locking connector (5);The middle shell (4) is provided with a sealing chamber (4-2);The locking connector (5) is screwed with the internal thread in the middle shell (4);The inner end of the sealing chamber (4-2) is provided with a converging portion (4-4);The converging portion (4-4) is in the form of an inclined surface;A cable passes through the threading hole in the internal sealing structure. The small-diameter section (1-1) of the external elastic sleeve (1) is located in the locking connector (5);The converging portion (4-4) in the middle shell (4) and the end of the locking connector (5) abut against the two ends of the external elastic sleeve (1) respectively.

8. An electrical connector as claimed in claim 7, wherein: An axially extending sliding groove is formed in the inner side wall of the locking connector (5);The outer side wall of the small-diameter section (1-1) is provided with a protruding guide strip (1-2-1);The protruding guide strip (1-2-1) on the external elastic sleeve (1) and the sliding groove in the locking connector (5) are matched and connected in sliding mode.

9. An electrical connector as claimed in claim 7, wherein: The shell assembly further comprises an end nut (3);The end nut (3) is screwed with the end of the middle shell (4) away from the locking connector (5).

10. An electrical connector as claimed in claim 7, wherein: The inclined surface structure of the converging portion (4-4) is in the form of a truncated cone.

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