Anti-rollback threaded cable accessory and connector assembly

Abstract

The cable accessory comprises a sleeve and a connecting nut rotationally arranged on the periphery of the front end of the sleeve, a locking sleeve is assembled on the periphery of the sleeve in the radial direction, and the front end of the locking sleeve and the connecting nut are matched through a concave-convex structure to achieve circumferential rotation stopping. The rear end is matched with the sleeve through a concave-convex structure to realize circumferential rotation stopping; and the locking sleeve is kept in a state of circumferentially stopping rotation with the connecting nut and the sleeve by virtue of the radial limiting connection of the locking sleeve. According to the cable accessory, the locking sleeve which is assembled, fixed and disassembled in the radial direction is additionally arranged between the connecting nut and the sleeve, the locking sleeve, the connecting nut and the sleeve are prevented from rotating in the circumferential direction, the structure is simple, assembling and disassembling operation is easy, and rapid assembling and disassembling can be achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of connector accessories, and particularly relates to an anti-back-off threaded cable accessory and a connector assembly. Background Art

[0002] The tail accessory of the connector is connected and fixed to the tail of the connector housing through a connecting nut. However, during use, the connecting nut that connects the tail accessory and the connector housing may become loose due to environmental vibration or other reasons, resulting in unreliable connection of the tail accessory, and further affecting the use stability of the connector. To solve the problem of loose threaded connection of the tail accessory, the prior art generally adopts the method of drilling a fuse hole or applying thread glue to achieve the purpose of thread anti-loosening. However, these anti-loosening methods have the problems of inconvenient operation and insufficient reliability. Summary of the Invention

[0003] The purpose of the present invention is to provide an anti-back-off threaded cable accessory with a novel structure, which realizes the anti-back-off of the connecting nut by adding a locking sleeve that is radially assembled, fixed, and disassembled between the connecting nut and the sleeve, and simultaneously locking the locking sleeve with the connecting nut and the sleeve.

[0004] The purpose of the present invention and the solution to its technical problems are achieved by the following technical solutions. An anti-back-off threaded cable accessory according to the present invention includes a sleeve 3 and a connecting nut 1 rotatably disposed on the outer periphery of the front end of the sleeve 3. A locking sleeve 5 is radially assembled on the outer periphery of the sleeve 3. The front end of the locking sleeve 5 is circumferentially stopped from rotating with the connecting nut 1 through the cooperation of concave and convex structures, and the rear end is circumferentially stopped from rotating with the sleeve 3 through the cooperation of concave and convex structures. A connecting member that radially limits the locking sleeve 5 keeps the locking sleeve 5 in a state of circumferentially stopping from rotating with the connecting nut 1 and the sleeve 3.

[0005] The purpose of the present invention and the solution to its technical problems can also be further realized by the following technical measures.

[0006] For the aforementioned anti-back-off threaded cable accessory, at least one tooth and tooth groove on the front end face of the locking sleeve 5 are adapted and engaged with the tail end face of the connecting nut 1. [[ID=2,4]]

[0007] For the aforementioned anti-back-off threaded cable accessory, circumferential rotation prevention between the sleeve 3 and the locking sleeve 5 is achieved through the cooperation of at least one convex key and key groove.

[0008] For the aforementioned anti-back-off threaded cable accessory, circumferential rotation prevention between the sleeve 3 and the locking sleeve 5 is achieved through the cooperation of the convex key / key groove distributed on the inner circumference of the locking sleeve 5 and the key groove / convex key on the outer circumference of the sleeve 3.

[0009] The aforementioned anti-back-off threaded cable accessory realizes circumferential anti-rotation through the cooperation of the convex keys / grooves distributed on the tail end face of the locking sleeve 5 and the grooves / convex keys distributed on the outer peripheral ring platform 33 of the sleeve 3 between the sleeve 3 and the locking sleeve 5.

[0010] For the aforementioned anti-back-off threaded cable accessory, the front end of the locking sleeve 5 is axially blocked and limited by the connecting nut 1, and the rear end is axially blocked and limited by the ring platform 33.

[0011] For the aforementioned anti-back-off threaded cable accessory, the extending length of the groove along the axial direction of the sleeve 3 is greater than the extending length of the convex key adapted to the groove, so that the locking sleeve 5 can perform axial floating, and within the axial floating stroke of the locking sleeve 5, the locking sleeve 5 always maintains circumferential anti-rotation with the connecting nut 1 and the sleeve 3.

[0012] For the aforementioned anti-back-off threaded cable accessory, the connecting member is a cable tie 6.

[0013] For the aforementioned anti-back-off threaded cable accessory, the locking sleeve 5 is a cylindrical structure formed by the relative buckling of two arc-shaped sleeves.

[0014] For the aforementioned anti-back-off threaded cable accessory, two limiting platforms 53 are distributed at intervals along the axial direction on the outer periphery of the locking teeth 5, and the cable tie 6 is bundled in the annular groove between the two limiting platforms.

[0015] Compared with the prior art, the present invention has obvious advantages and beneficial effects. By means of the above technical solutions, the present invention can achieve considerable technical progressiveness and practicability, and has wide utilization value in the industry. It has at least the following advantages:

[0016] The cable accessory of the present invention realizes the anti-back-off of the connecting nut by adding a locking sleeve that is assembled, fixed and disassembled radially between the connecting nut and the sleeve, and realizes circumferential anti-rotation of the locking sleeve with the connecting nut and the sleeve. It not only has a simple structure, but also does not require special tools for assembly and disassembly, is easy to operate, and can realize rapid assembly and disassembly.

[0017] The locking sleeve for realizing anti-loosening locking of the cable accessory of the present invention is located between the connecting nut and the sleeve, and does not increase the radial dimension of the accessory. Moreover, the locking sleeve is assembled radially and has no requirement for the assembly space in the axial direction.

[0018] The cable accessory of the present invention can realize cyclic unlocking and locking. When unlocking, the cable accessory can be normally connected and separated from the connector, and when locking, the threaded connection part between the cable accessory and the connector does not back off. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the anti-back-off threaded cable accessory according to Embodiment 1 of the present invention;

[0020] Figure 2This is the exploded view of the anti-back-off threaded cable accessory according to Embodiment 1 of the present invention;

[0021] Figure 3 This is the exploded view of the anti-back-off threaded cable accessory according to Embodiment 2 of the present invention.

[0022]

Description of Main Component Symbols

[0023] 1 - Connecting nut

[0024] 11 - First annular groove

[0025] 12 - Tooth groove

[0026] 2 - Rubber ring

[0027] 3 - Sleeve

[0028] 31 - Second annular groove

[0029] 32 - Keyway

[0030] 33 - Annular platform

[0031] 34 - Anti-rotation tooth

[0032] 35 - Groove

[0033] 4 - Circlip

[0034] 5 - Locking sleeve

[0035] 51 - Locking tooth

[0036] 52 - First convex key

[0037] 53 - Limiting platform

[0038] 54 - Second convex key

[0039] 6 - Cable tie Detailed implementation manners

[0040] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following, in combination with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features, and effects of the anti-back-off threaded cable accessory according to the present invention as follows.

[0041] Please refer to Figure 1 and Figure 2 , which is the structural schematic diagram of the anti-back-off threaded cable accessory according to Embodiment 1 of the present invention. The cable accessory includes a straight sleeve 3 extending along the axial direction and a connecting nut 1 rotatably arranged on the outer periphery of the front end of the sleeve 3. The connecting nut 1 is connected to the sleeve 3 in a tensile manner and can realize the connection between the sleeve 3 and the connector housing through the cooperation of the internal thread on its front end and the external thread on the outer periphery of the connector housing.

[0042] The cable accessory further includes a locking sleeve 5. In the embodiment of the present invention, the locking sleeve 5 is a cylindrical structure formed by the relative buckling of two arc-shaped sleeves. The two arc-shaped sleeves forming the locking sleeve 5 are buckled radially relative to the outer periphery of the sleeve 3, and the two arc-shaped sleeves are also kept in a buckled state through a connecting member. In this state, the locking sleeve 5 is also in circumferential anti-rotation cooperation with the connecting nut 1 and the sleeve 3 respectively. In this embodiment, the tail of the connecting nut 1 has tooth grooves 12 distributed at intervals in the circumferential direction, and at least one front end face of the arc-shaped sleeves forming the locking sleeve 5 is provided with at least one locking tooth 51. The locking sleeve 5 realizes the circumferential anti-rotation cooperation between the two through the engagement of the locking tooth 51 and the tooth groove 12 at the tail of the connecting nut 1. In other embodiments of the present invention, the locking teeth 51 and the tooth grooves 12 may also be provided with the same number, each locking tooth 51 corresponding to one tooth groove 12, and both may be provided with one or multiple. Preferably, the locking tooth 51 is a rectangular tooth, and the tooth groove 12 is a rectangular groove.

[0043] In the embodiment of the present invention, the locking sleeve 5 realizes the circumferential anti-rotation cooperation with the sleeve 3 through the cooperation of at least one first convex key 52 on its inner circumference and the key groove 32 on the outer circumference of the sleeve 3. In this embodiment, the key groove 32 is a groove extending radially along the outer circumference of the sleeve 3. Preferably, each of the two arc-shaped sleeves forming the locking sleeve 5 is provided with a first convex key 52 on its inner circumference.

[0044] In this embodiment, a ring platform 33 is further provided on the outer circumference of the sleeve 3. When the locking sleeve 5 is held on the outer circumference of the sleeve 3 and is in circumferential anti-rotation with the sleeve and the connecting nut 1, the ring platform 33 axially stops and limits the end face at the tail of the locking sleeve 5, and the front end face of the locking sleeve 5 is axially stopped and limited by the end face at the tail of the connecting nut 1. Preferably, the extension length of the key groove 32 in the axial direction of the sleeve 3 is much greater than the length of the first convex key 52, so that the first convex key 52 has a certain axial floating amount in the key groove 32, reducing the requirement for the positioning accuracy between the first convex key 52 and the key groove 32. In other embodiments of the present invention, the design of the ring platform 33 can be cancelled, and the circumferential anti-rotation and axial limitation of the locking sleeve 5 are directly realized through the cooperation of the key and the key groove and the cooperation of the tooth and the tooth groove. Among them, in the axial direction, the key can axially float in the key groove, and the tooth can also axially float in the tooth groove, so that the locking sleeve 5 can axially float. However, within its floating stroke, the first convex key 52 is always in circumferential anti-rotation cooperation with the key groove 32, and the locking tooth 51 always maintains circumferential anti-rotation cooperation with the tooth groove 12.

[0045] In an embodiment of the present invention, the connecting member is a cable tie 6, which ties together two arc-shaped sleeves forming the locking sleeve 5 to keep it in a state of circumferentially limiting the sleeve 3. Preferably, the cable tie 6 is a steel cable tie. When it is necessary to unlock the connection nut 1, the steel cable tie is removed, and the two arc-shaped sleeves forming the locking sleeve 5 are separated radially. Preferably, two limiting platforms 53 are distributed at intervals along the axial direction on the outer periphery of the locking teeth 5, and the cable tie 6 is tied in the annular groove between the two limiting platforms 53, and the cable tie 6 is axially limited by the two limiting platforms 53.

[0046] In another embodiment of the present invention, the connecting member includes a clamping platform located on the outer periphery of one of the arc-shaped sleeves and a clamping hook located on the other arc-shaped sleeve, and the two arc-shaped sleeves are kept in a buckled state through the cooperation of the clamping platform and the clamping hook.

[0047] In an embodiment of the present invention, the connection nut 1 and the sleeve 3 are connected in a tensile manner through a circlip 4. The outer ring of the circlip 4 is located in the first annular groove 11 on the inner periphery of the connection nut 1, and the inner ring is located in the second annular groove 31 on the outer periphery of the sleeve 3. To prevent the circlip 4 from slipping out of the first annular groove 11, the second annular groove 31 is a stepped groove that is shallow at the front and deep at the rear. Among them, the deep groove at the rear end of the second annular groove 31 is used to accommodate the circlip 4, so that when the connection nut 1 is assembled, the circlip 4 can completely enter the second annular groove 31 to prevent it from interfering with the connection nut 1. The shallow groove at the front end of the second annular groove 31 is used to limit the inner periphery of the circlip 4 to prevent it from slipping out of the first annular groove 11. When the present invention is assembled, first, the circlip 4 is installed in the deep groove at the rear end of the second annular groove 31, and then the connection nut 1 is sleeved on the sleeve 3. When the first annular groove 11 on the connection nut 1 moves to a position corresponding to the deep groove at the rear end of the second annular groove 31, the circlip 4 expands and enters the first annular groove 11, and the connection nut 1 is axially moved forward until the connection nut 1 is axially blocked and limited, then the connection nut is assembled in place. At this time, the outer ring of the circlip 4 is located in the first annular groove 11, and the inner ring is located in the shallow groove at the front end of the second annular groove 31 and is radially limited by the bottom of the shallow groove.

[0048] In another embodiment of the present invention, the connection nut 1 and the sleeve 3 are connected in a tensile manner through the cooperation of internal and external protrusions. An internal protrusion is provided inside the connection nut 1, and an external protrusion is provided on the outer periphery of the sleeve 3. The front end face of the internal protrusion and the rear end face of the external protrusion are in abutting cooperation to achieve the tensile connection between the connection nut 1 and the sleeve 3. In this embodiment, the connection nut 1 can only be assembled on the outer periphery of the sleeve 3 from the rear to the front.

[0049] An annular groove is further provided on the inner circumference at the front end of the connecting nut 1. An O-ring 2 for sealing between the connecting nut 1, the connector housing and the sleeve 3 is provided in this annular groove to prevent external liquid or dust from entering the connector and the accessory through the connection between the accessory and the connector housing. In this embodiment, at least two ribs are provided on both the inner peripheral surface and the outer peripheral surface of the O-ring 2 to enhance its sealing effect.

[0050] On the front end face of the sleeve 3, rotation-preventing teeth 34 evenly distributed in the circumferential direction are provided. The rotation-preventing teeth 34 can engage with the teeth on the end face at the tail of the connector housing to achieve circumferential rotation prevention between the sleeve 3 and the connector housing.

[0051] A plurality of tooth grooves extending in the circumferential direction and spaced axially are further provided on the outer circumference at the tail of the sleeve 3. These tooth grooves are used to enhance the friction between the cable shielding layer and the outer peripheral surface of the sleeve 3 to achieve reliable fixation of the cable shielding layer on the outer circumference of the sleeve 3. An annular anti-disengagement platform is respectively provided at the positions in front of and behind the tooth grooves on the outer circumference of the sleeve 3.

[0052] Please refer to Figure 3 , which is an exploded view of the cable accessory according to Embodiment 2 of the present invention. The difference between this embodiment and Embodiment 1 is that: the key groove 32 is a groove 35 distributed on the annular platform 33. At this time, the locking sleeve 5 realizes circumferential rotation prevention through the cooperation of the second convex key 54 on its tail end face and the key groove 35 on the annular platform 33. At the same time, the front and rear end faces of the locking sleeve 5 are respectively blocked and limited by the tail end face of the connecting nut 1 and the front end face of the annular platform 33. Preferably, a second convex key 54 is respectively provided on the two arc-shaped sleeve tails forming the locking sleeve 5, so that a group of second convex keys 54 located on the tail end faces of different arc-shaped sleeves are provided on the locking sleeve 5, and two groups of grooves 35 are provided on the annular platform 33. Each group of grooves can be adapted to the second convex key 54 on the locking sleeve 5, and the setting of the two groups of grooves 35 can realize the radial installation and disassembly of the locking sleeve 5 from different sides of the outer circumference of the sleeve 3 to meet different operation and use requirements.

[0053] The following difference features also exist between Embodiment 2 and Embodiment 1 of the present invention: The sleeve 3 in this application is of a bent structure. The locking sleeve 5 of the present invention is a structure installed, fixed and disassembled radially, so that it can be adapted to sleeves 3 of different structural forms.

[0054] The above is only a preferred embodiment of the present invention. However, in other embodiments of the present invention, the locking sleeve 5 may also be an arc-shaped sleeve structure that only covers one side of the outer circumference of the sleeve 3. The locking sleeve 5 is assembled, fixed, disassembled, and removed radially along one side of the sleeve 3. The connecting member radially limits the locking sleeve 5 to keep it on the outer circumference of the sleeve 3, and thus maintain the circumferential anti-rotation cooperation with the connecting nut 1 and the sleeve 3. The connecting member may be a cable tie 6 or a snap structure composed of a hook and a bayonet (part of the snap structure is located on the locking sleeve 5, and part is located on the sleeve 3 or the connecting nut 1), etc., which can fix the locking sleeve 5 on the outer circumference of the sleeve 3.

[0055] The circumferential anti-rotation between the locking sleeve 5, the sleeve 3, and the connecting nut 1 of the present invention is realized through the cooperation of concave and convex structures. When the locking sleeve 5 contacts the end face of the connecting nut 1, the locking sleeve 5 and the connecting nut 1 are cooperated by means of a convex key and a keyway or teeth and tooth grooves, that is, one of the locking sleeve 5 and the connecting nut 1 is provided with a convex key / teeth, and the other is provided with a keyway / tooth grooves. When the locking sleeve 5 is sleeved on the outer circumference of the connecting nut 1, the locking sleeve 5 and the connecting nut 1 can still be cooperated by means of a convex key / teeth and a keyway / tooth grooves. One of the convex key / teeth and the keyway / tooth grooves is provided on the inner wall of the locking sleeve 5, and the other is provided on the outer circumferential surface of the connecting nut 1. The circumferential anti-rotation cooperation between the locking sleeve 5 and the sleeve 3 of the present invention is also carried out by means of teeth and tooth grooves.

[0056] The present invention also provides a connector assembly, which includes a connector and the above cable accessory. The cable accessory is threadedly locked to the tail of the connector housing through a connecting nut, and the locking sleeve 5 realizes the anti-loosening after the connecting nut is locked.

[0057] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the technical content of the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A back-off prevention threaded cable accessory, which comprises a sleeve and a connection nut rotatably arranged on the outer periphery of the front end of the sleeve, and is characterized in that: A locking sleeve is radially assembled along the outer periphery of the sleeve. The front end of the locking sleeve and the connecting nut are circumferentially locked through the cooperation of concave and convex structures, and the rear end of the locking sleeve and the sleeve are circumferentially locked through the cooperation of concave and convex structures. A connecting piece that radially limits the locking sleeve keeps the locking sleeve in a state of circumferential locking with the connecting nut and the sleeve.

2. The anti-back-off thread cable accessory according to claim 1, characterized in that: The front end face of the locking sleeve and the tail end face of the connecting nut are engaged through the adaptation of at least one tooth and tooth groove.

3. The anti-back-off threaded cable accessory according to claim 2, wherein: Circumferential locking between the sleeve and the locking sleeve is achieved through the cooperation of at least one key and keyway.

4. The anti-back-off thread cable accessory according to claim 3, wherein: Circumferential locking between the sleeve and the locking sleeve is achieved through the cooperation of the key / keyway distributed on the inner circumference of the locking sleeve and the keyway / protruding key on the outer periphery of the sleeve.

5. The anti-back-off threaded cable accessory according to claim 3, characterized in that: Circumferential locking between the sleeve and the locking sleeve is achieved through the cooperation of the key / keyway distributed on the tail end face of the locking sleeve and the keyway / protruding key distributed on the outer peripheral ring platform of the sleeve.

6. The anti-back-off threaded cable accessory according to claim 5, wherein: The front end of the locking sleeve is axially blocked and limited by the connecting nut, and the rear end is axially blocked and limited by the ring platform.

7. The anti-back-off threaded cable accessory according to claim 3, characterized in that: The extending length of the keyway along the axial direction of the sleeve is greater than the extending length of the protruding key adapted to the keyway, so that the locking sleeve can axially float, and within the axial floating stroke of the locking sleeve, the locking sleeve always maintains circumferential locking with the connecting nut and the sleeve.

8. The anti-back-off threaded cable accessory according to any one of claims 1-7, characterized in that: The connecting piece is a cable tie.

9. The anti-back-off threaded cable accessory according to claim 8, wherein: The locking sleeve is a cylindrical structure formed by the relative buckling of two arc-shaped sleeves.

10. The anti-back-off threaded cable accessory according to claim 9, characterized in that: Two limiting platforms are spaced along the axial direction on the outer periphery of the locking tooth, and the cable tie is bundled in the annular groove between the two limiting platforms.

11. A connector assembly, comprising a connector and an accessory threadedly connected to the tail of the connector housing, characterized in that: The accessory is the anti-back-off threaded cable accessory according to any one of claims 1-10.

Images