A quick connecting device for low voltage branch box cable

Abstract

The application discloses a quick connecting device for low-voltage branch box cable lines, and relates to the technical field of cable connection, which comprises a quick connector for butt joint of upper and lower cables, a butt joint of a clamping assembly, pre-plugging measures provided for the upper and lower cables, inward extrusion force applied to the upper and lower cables through a screwing assembly and a locking assembly, wiring measures provided for the upper and lower cables through a wiring box with mounting ears, and reverse limiting measures applied to the upper and lower cables through a toothed assembly and a limiting assembly. The application adopts staggered distribution of pressing heads and stopping heads to realize double locking effects of deformation pressing and gap stopping on the outer sheaths and inner cores of the upper and lower cable lines, is quick and convenient to operate, is more fastened, and utilizes a circular gear to tooth-connect butt joint teeth on the locking heads, and then applies limiting measures in the up / down direction after the tooth connection is blocked by a anti-escape rotating disc, so that the whole device is stable and convenient for quick wiring.

Description

Technical Field

[0001] This invention relates to the field of cable wiring technology, and in particular to a quick-connect device for cables in low-voltage branch boxes. Background Technology

[0002] Cable branch boxes are used only for cable branching. Their main function is to split and transfer cables. Cable branch boxes are mainly used to split and transfer cables by tightening screws and using quick-connect connectors.

[0003] For connection methods that use screw tightening and quick-plug connectors, screw tightening requires tools, is time-consuming and labor-intensive, while quick-plug connectors can only connect the outer sheath of the cable, making it easy for the wire cores to have poor connections. Moreover, after too many uses, the connectors are also prone to loosening and detachment. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing quick-connect devices for low-voltage branch box cables, the present invention is proposed.

[0006] Therefore, the problem to be solved by this invention is how to achieve a fast and stable connection of cables.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a quick-connect device for cables in a low-voltage branch box, comprising a quick connector for connecting an upper cable and a lower cable, a butt joint of a snap-fit ​​assembly providing pre-insertion measures for the upper cable and the lower cable, and an inward compressive force applied to the upper cable and the lower cable by a screw assembly and a locking assembly, a wiring box with mounting ears providing wiring measures for the upper cable and the lower cable, and a reverse restraint measure applied to the upper cable and the lower cable by a toothed assembly and a restraining assembly.

[0008] As a preferred embodiment of the quick-connect device for low-voltage branch box cables described in this invention, the snap-fit ​​assembly further includes an expansion ring fixed to the outside of the connector, and the connector is fixed to the quick-connect. The connector has an annular anti-detachment groove for limiting the upper and lower cables, and the anti-detachment groove is designed with an axisymmetric inward tilt along the transverse axis of the quick-connect.

[0009] As a preferred embodiment of the quick-connect device for low-voltage branch box cables described in this invention, the quick connector is provided with an insulating cylinder in a triangular equidistant shape in the middle for connecting the inner cores of the upper and lower cables, and the upper and lower sides of the insulating cylinder are fixed with binding rings for limiting the core position.

[0010] As a preferred embodiment of the quick-connect device for low-voltage branch box cables described in this invention, the screw connection assembly includes external threads annularly opened on the upper and lower sides of the quick connector, and locking heads are slidably passed through on both the upper and lower sides of the quick connector. The locking heads are provided with annularly opened internal thread grooves that are threadedly connected to the external threads.

[0011] As a preferred embodiment of the quick-connect device for low-voltage branch box cables described in this invention, the inner side of the locking head is respectively fixed with a pressing end and a stopping end in a ring, and is located on the outer ring of the external thread. The inner end of the pressing end adopts a stepped arc chamfer design, and the inner end of the stopping end adopts a concave arc chamfer design. The middle part of the quick connector is fixed with a limiting ring that engages with the locking head.

[0012] As a preferred embodiment of the quick-connect device for low-voltage branch box cables described in this invention, the locking assembly includes a bending groove circumferentially formed on the inner side of the quick connector, and a bending head that matches the pressure end is provided in the bending groove. A pressure head for pressing the upper cable and the lower cable sheath is fixed on the inner side of the bending head.

[0013] As a preferred embodiment of the quick-connect device for low-voltage branch box cables described in this invention, the quick connector is provided with a limiting sleeve embedded on its outer circumference, and a stop head is provided inside the limiting sleeve for the upper cable and the lower cable sheath to abut against each other. The limiting sleeve and the stop head are clearance fit, and the stop head and the pressure head are interference fit with the upper cable and the lower cable sheath.

[0014] As a preferred embodiment of the quick-connect device for low-voltage branch box cables described in this invention, the toothed assembly includes a damping bearing embedded in the wiring box, and an anti-detachment turntable with a pinch lug is rotatably provided on the outer side of the damping bearing. Both the anti-detachment turntable and the inner side of the wiring box are provided with mating tooth grooves, and the outer side of the anti-detachment turntable is not designed with mating tooth grooves, but is a smooth solid surface.

[0015] As a preferred embodiment of the quick-connect device for low-voltage branch box cables described in this invention, wherein: both sides of the locking head are fixed with arrayed mating teeth that are inserted into the mating groove, and the outer side of the mating teeth penetrates the mating groove and meshes with a circular gear that rotates with the wiring box.

[0016] As a preferred embodiment of the quick-connect device for low-voltage branch box cables described in this invention, the limiting component includes a concentric shaft fixed inside a spur gear, and a ratchet that rotates with the wiring box is sleeved on the concentric shaft. The ratchet has a pawl that rotates with the wiring box on its inner side, and a spring that is fixed with the wiring box is fixed on the outer side of the pawl. The upper and lower sets of ratchet and pawl are distributed in an axially symmetrical state along the transverse axis of the wiring box, and the limiting directions of the two sets of ratchet and pawl are opposite.

[0017] The beneficial effects of this invention are as follows: First, the upper and lower cables are connected in opposite directions to achieve a preliminary connection of the outer sheaths and a one-to-one connection of the inner cores. Then, the sliding and screwing locking of two sets of locking heads, along with the staggered distribution of pressure and stop heads, achieve a dual locking effect of deformation pressure and gap stop on the outer sheaths and inner cores of the upper and lower cables. The operation is quick and convenient, and more secure. Furthermore, the teeth on the locking heads are engaged by a circular gear, and after being blocked and limited by an anti-detachment turntable, upward and downward restriction measures are applied to ensure the overall stability of the upper and lower cables and facilitate rapid wiring. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front view of the quick-connect device for low-voltage branch box cables.

[0020] Figure 2 This is an exploded view of the quick-connect device for low-voltage branch box cables.

[0021] Figure 3 This is an exploded view of the quick-connect fitting, upper cable, and lower cable of the quick-connect device for low-voltage branch box cables.

[0022] Figure 4 An exploded view of the quick-connect fitting for a low-voltage branch box cable device.

[0023] Figure 5 Top sectional view of the quick connector for a quick-connect device for low-voltage branch box cables.

[0024] Figure 6 A side sectional view of the quick connector for a quick-connect device used in low-voltage branch box cables.

[0025] Figure 7A top-view cross-sectional view of the locking head of a quick-connect device for low-voltage branch box cables.

[0026] Figure 8 Rear view of the toothed connector assembly and limiting assembly for a quick-connect device for low-voltage branch box cables.

[0027] Figure 9 Exploded cross-sectional view of the anti-disconnection turntable, mounting lugs, and wiring box for quick-connect devices for low-voltage branch box cables.

[0028] In the diagram: 1. Quick connector; 2. Upper cable; 3. Lower cable; 41. Connector; 42. Expansion ring; 43. Anti-detachment tooth groove; 44. Insulating cylinder; 45. Restriction ring; 51. External thread; 52. Internal thread groove; 53. Locking head; 54. Pressing end; 55. Stopping end; 6. Limiting ring; 71. Bending groove; 72. Bending head; 73. Pressing head; 74. Limiting sleeve; 75. Stopping head; 8. Mounting ear; 9. Wiring box; 101. Damping bearing; 102. Anti-detachment turntable; 103. Connecting tooth groove; 104. Connecting tooth; 105. Circular gear; 111. Concentric shaft; 112. Ratchet; 113. Pawl; 114. Spring. Detailed Implementation

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0032] Example 1, referring to Figures 1-9 This is the first embodiment of the present invention. This embodiment provides a quick-connect device for cables in a low-voltage branch box, including a quick connector 1 for connecting an upper cable 2 and a lower cable 3, a butt connector 41 of a snap-fit ​​assembly, and the butt connector 41 is fixed to the quick connector 1, providing a pre-plugging measure for the upper cable 2 and the lower cable 3.

[0033] Specifically, it also includes an expansion ring 42 fixed on the outside of the connector 41. The expansion ring 42 expands and tightens the upper cable 2 and lower cable 3 that pass through the connector 41 and are inserted into the quick connector 1. Especially when the temperature rises, based on the principle of thermal expansion, it further interferes with the outer sheath of the upper cable 2 and lower cable 3, thus playing a preliminary anti-detachment role.

[0034] The quick connector 41 has an annular anti-detachment groove 43 for limiting the upper cable 2 and the lower cable 3. The anti-detachment groove 43 is designed with an axisymmetric inward tilt along the transverse axis of the quick connector 1. The anti-detachment groove 43 with the oblique tooth design can be used to press the outer jacket of the upper cable 2 and the lower cable 3 inserted into the quick connector 41, and also provide a reverse limiting measure for the outer jacket.

[0035] Specifically, the quick connector 1 has an insulating cylinder 44 embedded in the middle in a triangular equidistant shape for connecting the inner cores of the upper cable 2 and the lower cable 3. The outer jacket of the upper cable 2 and the lower cable 3 is peeled off in advance, and the exposed inner cores are connected and insulated one by one through the insulating cylinder 44. This not only achieves the pre-connection effect of the outer jacket of the upper cable 2 and the lower cable 3, but also plays a role in connecting the inner cores one by one, so as to avoid poor contact between the upper cable 2 and the lower cable 3 after connection.

[0036] Furthermore, both the upper and lower sides of the insulating cylinder 44 are fixed with binding rings 45 for limiting the wire core. Through the binding rings 45, the outer sheaths of the upper cable 2 and the lower cable 3 at the port of the insulating cylinder 44 are elastically bound and closed, which plays an auxiliary role in limiting and sealing and dust prevention.

[0037] Example 2, refer to Figures 1-9 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0038] Specifically, an inward compressive force is applied to the upper cable 2 and the lower cable 3 through the screw connection assembly and the locking assembly.

[0039] Specifically, the screw assembly includes external threads 51 that are annularly opened on the upper and lower sides of the quick connector 1, and locking heads 53 are slidably passed through on both the upper and lower sides of the quick connector 1. The two sets of locking heads 53 slide back and forth on the sliding end faces reserved on the upper and lower sides of the quick connector 1 to meet the requirements of the two sets of locking heads 53 for process locking and return reset.

[0040] The locking head 53 has an inner thread groove 52 that is threaded to the outer thread 51. When the upper cable 2 and the lower cable 3 are connected, the two sets of locking heads 53 are manually slid inward along the sliding end face area reserved on the upper and lower sides of the quick connector 1 into the reserved sealing groove of the connector 41, and then screwed clockwise through the inner thread groove 52 to the outer thread 51 to tighten the locking head 53, which is used to lock the process and facilitates the double abutment action of the upper cable 2 and the lower cable 3 sheath.

[0041] The quick connector 1 has a limiting ring 6 fixed in the middle that engages with the locking head 53. When the upper cable 2 and the lower cable 3 are disconnected, the locking head 53 is turned counterclockwise. After the inner thread groove 52 disengages from the outer thread 51, the two sets of locking heads 53 are moved outward along the reserved sliding end face area on the upper and lower sides of the quick connector 1, disengaging from the reserved sealing groove of the connector 41, and sliding to the limiting ring 6. The two sets of locking heads 53 are then engaged and left to stand still during the return stroke.

[0042] Specifically, the inner side of the locking head 53 is respectively fixed with a pressing end 54 and a stopping end 55 in a ring, and is located on the outer ring of the external thread 51, so as to avoid the pressing end 54 and the stopping end 55 from colliding and interfering with the external thread 51 when the locking head 53 returns to its original position.

[0043] The locking assembly includes a bending groove 71 circumferentially formed inside the quick connector 1, and a bending head 72 that matches the pressing end 54 is provided in the bending groove 71. The bending groove 71 provides space support for the pressing deformation of the bending head 72. The inner end of the pressing end 54 adopts a stepped arc chamfer design that matches the bending head 72, which improves the smoothness of the pressing end 54's inner sliding and pressing action on the bending head 72 and avoids jamming between the pressing end 54 and the bending head 72.

[0044] An extension end is reserved at the outer end of the pressure end 54 for sealing the bending head 72. This ensures that while the pressure end 54 is pressed against the circumferentially distributed bending heads 72, the extension end limits and seals the bending heads 72 that are squeezed inward, thus offsetting the reverse squeezing force generated by the upper cable 2 and the lower cable 3 sheath on the bending head 72, and also serves as a dustproof function.

[0045] The inner side of the bending head 72 is fixed with a pressing head 73 for pressing the upper cable 2 and the lower cable 3 sheath together. The pressing head 73 is made of insulating material and has a pressing surface with anti-slip texture on the inner side, which increases the friction coefficient between the upper and lower rows of pressing heads 73 and the upper cable 2 and the lower cable 3 sheath, thus playing an anti-slip role.

[0046] In use: The two sets of locking heads 53 in the process lock state drive the pressure end 54 inside to slide synchronously inward along the sliding end face area reserved on the upper and lower sides of the quick connector 1. When the pressure end 54 reaches the area of ​​several circumferentially distributed bending heads 72, the bending heads 72 are subjected to the inward squeezing force gradually generated by the pressure end 54, which forces the bending heads 72 to undergo synchronous squeezing deformation inward in the bending groove 71, and synchronously drive the same number of pressure heads 73 to press against the upper cable 2 and lower cable 3 jackets that are pre-inserted into place. Then, the pressure is applied evenly and comprehensively to the jackets of the upper cable 2 and lower cable 3 to complete the first-level locking connection action.

[0047] A limiting sleeve 74 is embedded in the outer circumference of the quick connector 1, and a stop head 75 is provided inside the limiting sleeve 74 for stopping the upper cable 2 and the lower cable 3. The inner diameter of the reserved openings on both sides of the limiting sleeve 74 is smaller than the outer diameter of the stop head 75 to prevent the stop head 75 from being squeezed by the stop end 55, thus avoiding the phenomenon of detachment and falling off due to the restraint of the limiting sleeve 74. The limiting sleeve 74 and the stop head 75 adopt a clearance fit to meet the requirement of the stop head 75 to move inward and squeeze within the limiting sleeve 74. After the two sets of locking heads 53 return to their original position and lose the squeezing force of the stop end 55, it is convenient for the stop head 75 to move inward and outward within the limiting sleeve 74, making it easy to pull out the upper cable 2 and the lower cable 3.

[0048] The stop head 75 adopts a hard sphere design made of insulating material. The inner end of the stop end 55 adopts a concave arc chamfer design that matches the stop head 75, which increases the squeezing force of the stop end 55 on the stop head 75, forcing the stop head 75 to effectively press against the upper cable 2 and the lower cable 3 jacket. At the same time, it avoids the stop head 75 from being deformed by the reverse squeezing force generated by the upper cable 2 and the lower cable 3 jacket.

[0049] In use: The two sets of locking heads 53 in the process lock state drive the abutment ends 55 inside to slide synchronously inward along the sliding end face areas reserved on the upper and lower sides of the quick connector 1. When the abutment ends 55 reach the area of ​​several abutment heads 75 distributed around the circumference, the several abutment heads 75 are subjected to the inward squeezing force gradually generated by the abutment ends 55, forcing the several abutment heads 75 to move synchronously inward within the limiting sleeve 74, and uniformly and comprehensively abutting the upper cable 2 and lower cable 3 jacket that are pre-inserted into place. Combined with the first-level locking connection action of the pressure end 54 and the bending head 72, the double locking connection operation of the upper cable 2 and lower cable 3 jacket is completed.

[0050] If the connection section of the upper cable 2 and the lower cable 3 is damaged, the two sets of locking heads 53 will slide back inward, and several pressing heads 73 will lose the squeezing force of the pressing end 54, and several stopping heads 75 will also lose the squeezing force of the stopping end 55. Then, the connection section of the upper cable 2 and the lower cable 3 will be pulled outward, and under the action of the pulling force, the bending heads 72 on several pressing heads 73 will be forced to deform outward in the bending groove 71, and several stopping heads 75 will slide outward in the limiting sleeve 74, releasing the squeezing and locking measures of the connection section of the upper cable 2 and the lower cable 3. After maintenance, the double locking can be re-established as above. It is not a one-time locking, can be reused, and is easy to operate.

[0051] The stop head 75 and the pressure head 73 are both interference-fitted with the outer sheaths of the upper cable 2 and the lower cable 3, so that the stop head 75 and the pressure head 73 are pressed into place with the outer sheaths of the upper cable 2 and the lower cable 3. The outer sheath areas of the upper cable 2 and the lower cable 3 are also squeezed and indented after being doubly locked by the stop head 75 and the pressure head 73, which enhances the mutual stopping and fastening effect.

[0052] Furthermore, the stop head 75 and the pressure head 73 are distributed in an alternating manner, and the alternating clamping method is used to uniformly and comprehensively lock the double locking areas of the upper cable 2 and the lower cable 3 jacket, further forcing the connection between them to be more secure.

[0053] Example 3, referring to Figures 1-9 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0054] Specifically, the wiring box 9 with mounting ears 8 is pre-fixed inside the low-voltage branch box to provide wiring measures for the upper cable 2 and the lower cable 3, and reverse restriction measures are applied to the upper cable 2 and the lower cable 3 through the toothed assembly and the limiting assembly.

[0055] Specifically, the toothed assembly includes a damping bearing 101 embedded in the wiring box 9, and an anti-detachment turntable 102 with a pinch lug is rotatably mounted on the outer side of the damping bearing 101. Both the anti-detachment turntable 102 and the inner side of the wiring box 9 are provided with mating tooth grooves 103 to meet the through-insertion requirements of the mating teeth 104 and the mating tooth grooves 103 on the two sets of locking heads 53.

[0056] Furthermore, the outer side of the anti-detachment turntable 102 does not adopt the design of the mating tooth groove 103, but is a smooth solid surface. It rotates and seals the mating teeth 104 on the two sets of locking heads 53 that are in place. Then, it provides lateral limiting and anti-detachment measures for the upper cable 2 and lower cable 3 that are locked in place, and also prevents dust from entering from the exposed mating tooth groove 103, thus playing a sealing and dustproof role.

[0057] Both sides of the locking head 53 are fixed with mating teeth 104 that are inserted into the mating groove 103, and the outer side of the mating teeth 104 penetrates the mating groove 103 and meshes with a round gear 105 that rotates with the wiring box 9.

[0058] In use: After manually locking and connecting the upper cable 2 and the lower cable 3, the mating teeth 104 on the two sets of locking heads 53 pass through the inward mating grooves 103 on the anti-detachment turntable 102 and the wiring box 9, reaching the meshing part of the upper and lower sets of spur gears 105. Then, pinch the ear to drive the anti-detachment turntable 102 to rotate in opposite directions, disengaging the mating grooves 103 on the anti-detachment turntable 102 from the mating grooves 103 on the wiring box 9, until the smooth solid surface on the anti-detachment turntable 102 rotates to the mating groove 103 area on the wiring box 9, with the mating grooves 103 on the anti-detachment turntable 102 facing outward. Then, the smooth solid surface on the anti-detachment turntable 102, now in position, seals the mating teeth 104 meshing with the meshing part of the upper and lower sets of spur gears 105.

[0059] Specifically, the limiting component includes a concentric shaft 111 fixed inside the spur gear 105, and a ratchet 112 that rotates with the wiring box 9 is sleeved on the concentric shaft 111. The inner side of the ratchet 112 is engaged with a pawl 113 that rotates with the wiring box 9, and the outer side of the pawl 113 is fixed with a spring 114 that is fixed with the wiring box 9.

[0060] In use: When the mating teeth 104 on the two sets of locking heads 53 reach the meshing part of the upper and lower sets of spur gears 105 and are limited and blocked by the smooth solid surface on the anti-detachment turntable 102, the pawl 113 provides a reverse restriction measure to the ratchet 112 on the concentric shaft 111 of the upper and lower sets of spur gears 105, and the spring 114 provides elastic resistance to the pawl 113, forcing the pawl 113 to always be stuck on the ratchet 112. This provides a longitudinal limit and anti-detachment measure for the two sets of locking heads 53 that are in place, as well as the upper cable 2 and lower cable 3 that are doubly locked in place. It also facilitates the connection of the upper cable 2 and lower cable 3 to the in place for quick wiring in the low-voltage branch box.

[0061] The upper and lower sets of ratchet wheels 112 and pawls 113 are symmetrically distributed along the horizontal axis of the wiring box 9, and the limiting directions of the two sets of ratchet wheels 112 and pawls 113 are opposite. The upper two sets of ratchet wheels 112 and pawls 113 apply a downward limiting force to the upper locking head 53 through the two sets of sprockets 105, and simultaneously the lower two sets of ratchet wheels 112 and pawls 113 apply an upward limiting force to the lower locking head 53 through the two sets of sprockets 105. This prevents the two sets of locking heads 53 from becoming loose or disengaged, resulting in a tighter overall fit.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A quick-connect device for cables in a low-voltage branch box, characterized in that: Includes a quick connector (1) for connecting an upper cable (2) and a lower cable (3), a pre-connection mechanism for the upper cable (2) and the lower cable (3) provided by a snap-fit ​​assembly (41), and an inward pressing force applied to the upper cable (2) and the lower cable (3) by a screw assembly and a locking assembly, and a wiring mechanism for the upper cable (2) and the lower cable (3) provided by a wiring box (9) with mounting ears (8), the screw assembly including external threads (51) annularly opened on the upper and lower sides of the quick connector (1), and a locking head (53) sliding through the upper and lower sides of the quick connector (1), the locking head... The stop head (53) has an inner thread groove (52) that is threaded to the external thread (51). The inner side of the locking head (53) is respectively fixed with a pressing end (54) and a stopping end (55), which are located on the outer ring of the external thread (51). The inner end of the pressing end (54) adopts a stepped arc chamfer design, and the inner end of the stopping end (55) adopts a concave arc chamfer design. The middle part of the quick connector (1) is fixed with a limiting ring (6) that engages with the locking head (53). Through the toothed assembly and the limiting assembly, reverse limiting measures are applied to the upper cable (2) and the lower cable (3).

2. The quick-connect device for low-voltage branch box cables as described in claim 1, characterized in that: The snap-fit ​​assembly also includes an expansion ring (42) fixed on the outside of the connector (41), and the connector (41) is fixed to the quick connector (1). The connector (41) is provided with an anti-detachment groove (43) for limiting the upper cable (2) and the lower cable (3) in annular shape.

3. The quick-connect device for low-voltage branch box cables as described in claim 2, characterized in that: The quick connector (1) has an insulating cylinder (44) embedded in the middle in a triangular equidistant shape for connecting the inner cores of the upper cable (2) and the lower cable (3), and the upper and lower sides of the insulating cylinder (44) are fixed with binding rings (45) for limiting the cores.

4. The quick-connect device for low-voltage branch box cables as described in claim 3, characterized in that: The locking assembly includes a bending groove (71) circumferentially formed inside the quick connector (1), and a bending head (72) matching the pressing end (54) is provided in the bending groove (71). A pressing head (73) for pressing the upper cable (2) and the lower cable (3) together is fixed inside the bending head (72).

5. The quick-connect device for low-voltage branch box cables as described in claim 4, characterized in that: The quick connector (1) is provided with a limiting sleeve (74) on its outer circumference, and a stop head (75) is provided inside the limiting sleeve (74) for stopping the outer sheath of the upper cable (2) and the lower cable (3). The limiting sleeve (74) and the stop head (75) are clearance fit, and the stop head (75) and the pressure head (73) are interference fit with the outer sheath of the upper cable (2) and the lower cable (3).

6. The quick-connect device for low-voltage branch box cables as described in claim 5, characterized in that: The toothed assembly includes a damping bearing (101) embedded in the wiring box (9), and an anti-detachment turntable (102) with a pinch lug is rotatably connected to the outside of the damping bearing (101). Both the anti-detachment turntable (102) and the wiring box (9) have mating grooves (103) on their inner sides. The outer side of the anti-detachment turntable (102) does not use a mating groove (103) design and is a smooth solid surface.

7. The quick-connect device for low-voltage branch box cables as described in claim 6, characterized in that: Both sides of the locking head (53) are fixed with mating teeth (104) that are inserted into the mating groove (103), and the outer side of the mating teeth (104) penetrates the mating groove (103) and meshes with a round gear (105) that is rotatably connected to the wiring box (9).

8. The quick-connect device for low-voltage branch box cables as described in claim 7, characterized in that: The limiting component includes a concentric shaft (111) fixed inside a spur gear (105), and a ratchet (112) rotatably connected to the wiring box (9) is sleeved on the concentric shaft (111). A pawl (113) rotatably connected to the wiring box (9) is snapped onto the inner side of the ratchet (112), and a spring (114) fixed to the wiring box (9) is fixed to the outer side of the pawl (113). The two sets of ratchet (112) and pawl (113) are distributed in an axisymmetric manner along the transverse axis of the wiring box (9), and the limiting directions of the two sets of ratchet (112) and pawl (113) are opposite.

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