Retaining cable fixing head

Abstract

The utility model discloses a retaining cable fixing head, which relates to the technical field of electrical devices and comprises a tubular main body, the periphery of the main body is provided with external threads, the outer circumference of the middle of the main body is provided with an installation protrusion protruding outwards, a waterproof ring is inserted in a tightening end of the main body, and a packing nut is screwed on the outer circumference of the main body. The fixing end of the main body is in threaded connection with a locking nut, a sealing ring is arranged between the locking nut and the installation protrusion, at least one inwards-protruding retaining tooth is arranged on the edge of the inner diameter of the end, away from the installation protrusion, of the locking nut, and the retaining tooth comprises an abutting face used for abutting against the outer threads of the main body when the locking nut is screwed to the main body. The abutting face is a plane, and the retaining teeth are of an elastic structure. According to the arrangement, one or more retaining teeth are arranged on the locking nut, so that when the locking nut is screwed, assembled and locked, the retaining teeth are embedded into the threads, and the abutting surfaces abut against the inclined surfaces of the threads, so that the self-locking effect of limiting and fixing is formed, and the locking nut is prevented from loosening.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical devices, in particular to a cable fixing head with a locking mechanism. Background Art

[0002] Currently, existing cable glands primarily consist of five components: a locking nut, a waterproof ring, a main body, a sealing ring, and a lock nut. The locking nut is threaded into the main body, and the waterproof ring is compressed within the locking nut to achieve waterproofing. However, as cable glands age, they risk becoming loose due to vibration. During sea transportation, the high temperatures experienced by these glands can cause thermal expansion and contraction of the material, leading to thread loosening and a consequent loss of the threaded connection between the locking nut and the main body, compromising the seal between the locking nut and the waterproof ring.

[0003] Therefore, in response to the above technical problems, how to prevent the locking nut from loosening due to vibration or environmental influences is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The utility model aims to provide a cable fixing head with a locking mechanism, which can prevent a locking nut from loosening due to vibration or environmental influences.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A cable fixing head with a back-retraction mechanism comprises: a tubular main body with an external thread on its outer circumference, an outward-protruding mounting protrusion is provided on the outer circumference of the middle part of the main body, a waterproof ring is inserted in the tightening end of the main body and a tightening nut is screwed on its outer circumference, a locking nut is threadedly connected to the fixed end of the main body, a sealing ring is provided between the locking nut and the mounting protrusion, and the locking nut is provided with at least one inward-protruding back-retraction tooth on the inner diameter edge of the end facing away from the mounting protrusion, the back-retraction tooth comprises an abutment surface for pressing against the external thread of the main body when the locking nut is screwed onto the main body, the abutment surface is a plane, and the back-retraction tooth is an elastic structure.

[0007] Preferably, a clearance groove is provided on the upper side of the anti-retreat tooth, and the clearance groove is used to give way when the anti-retreat tooth is bent to prevent the anti-retreat tooth from breaking.

[0008] Preferably, the retaining tooth and the clearance groove are both arc-shaped structures as a whole, and the cross-section of the clearance groove is arc-shaped.

[0009] Preferably, the anti-retraction tooth and the locking nut are integrally formed by injection molding, and the material of the anti-retraction tooth is specifically elastic nylon.

[0010] Preferably, the inner diameter edge of the locking nut is evenly and the retaining teeth are arranged in pairs.

[0011] Preferably, the inner arc surface of the anti-retraction tooth is a conical surface, and the inner arc surface of the anti-retraction tooth gradually expands in diameter along the axial inward direction of the locking nut.

[0012] Preferably, the inner arc surface of the anti-recession tooth is a vertical cylindrical surface, and the inner arc surface of the anti-recession tooth abuts against the bottom of the external thread of the fixed end of the main body.

[0013] Preferably, the abutting surface is coated with an anti-slip material.

[0014] Preferably, the retaining tooth is a circular ring structure, and the abutting surface is coated with a waterproof material.

[0015] Compared with the above-mentioned background technology, the utility model provides a cable fixing head with a retreat prevention, comprising: a tubular main body with an external thread on its outer circumference, an outward-protruding mounting protrusion is provided on the outer circumference of the middle part of the main body, a waterproof ring is inserted in the tightening end of the main body and a tightening nut is screwed on its outer circumference, the fixed end of the main body is threadedly connected with a locking nut, a sealing ring is provided between the locking nut and the mounting protrusion, and the end of the locking nut facing away from the mounting protrusion is provided with at least one inward-protruding retreat prevention tooth on its inner diameter edge, the retreat prevention tooth comprises an abutment surface for pressing against the external thread of the main body when the locking nut is screwed onto the main body, the abutment surface is a plane, and the retreat prevention tooth is an elastic structure.

[0016] Specifically, when installing the cable fixing head provided by the present invention, it is necessary to insert the fixed end of the main body into the mounting hole of the required mounting box, and a sealing ring will be placed between the box wall and the mounting protrusion, and then the locking nut will be screwed from the back of the box wall to the external thread of the fixed end of the main body, so that the cable fixing head is installed on the box; it can be understood that the upper and lower side surfaces of the external thread teeth provided at the fixed end of the main body are both inclined surfaces, so when screwing the locking nut, the anti-recession teeth installed at the edge of its end will press against the teeth of the external thread, and because the abutting surface is a plane, the anti-recession teeth will be forced to deform during the screwing process of the locking nut, and because the anti-recession teeth have a certain elasticity, they will have a certain reaction pressure on the external thread of the main body, so that the locking nut and the external thread of the main body will be difficult to rotate due to the increased pressure, so the locking nut will not loosen easily after it is installed in place. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0018] Figure 1 An exploded view of the cable fixing head structure provided by an embodiment of the utility model;

[0019] Figure 2 A top view of the locking nut provided in an embodiment of the present utility model;

[0020] Figure 3 A cross-sectional view of a locking nut provided in an embodiment of the present utility model;

[0021] Figure 4 for Figure 3 A magnified view of the structure of part A;

[0022] Figure 5 A schematic diagram of the locking nut structure provided by an embodiment of the utility model;

[0023] Figure 6 for Figure 5 A magnified view of the structure of part B;

[0024] Figure 7 This is a structural diagram of another embodiment of the locking nut of the present utility model.

[0025] in:

[0026] 100-main body, 110-mounting protrusion;

[0027] 200- waterproof ring;

[0028] 300-locking nut;

[0029] 400-locking nut, 410-retraction tooth, 411-abutment surface, 412-yield groove;

[0030] 500-Seal ring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0033] In the description of the present invention, it should be understood that the terms "upper", "lower", "outer", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limitations of the present invention.

[0034] The utility model aims to provide a cable fixing head with a locking mechanism, which can prevent a locking nut from loosening due to vibration or environmental influences.

[0035] To achieve the above objectives, the present invention provides the following technical solutions:

[0036] See also Figures 1 to 7 , this embodiment provides a cable fixing head with a back-moving stop, comprising: a tubular main body 100 with an external thread on its outer circumference, an outward-protruding mounting protrusion 110 is provided on the outer circumference of the middle part of the main body 100, a waterproof ring 200 is inserted into the tightening end of the main body 100 and a locking nut 300 is screwed on its outer circumference, a locking nut 400 is threadedly connected to the fixed end of the main body 100, a sealing ring 500 is provided between the locking nut 400 and the mounting protrusion 110, and the end of the locking nut 400 facing away from the mounting protrusion 110 is provided with at least one inward-protruding back-moving tooth 410 on its inner diameter edge, the back-moving tooth 410 includes an abutting surface 411 for pressing against the external thread of the main body 100 when the locking nut 400 is screwed onto the main body 100, the abutting surface 411 is a plane, and the back-moving tooth 410 is an elastic structure.

[0037] Specifically, the installation process of the cable fixing head provided by the present invention is the same as that of the prior art. The fixed end of the main body 100 needs to be inserted into the mounting hole of the required mounting box, and a sealing ring 500 is placed between the box wall and the mounting protrusion 110. Then, the locking nut 400 is screwed from the back of the box wall to the external thread of the fixed end of the main body 100 to install the cable fixing head on the box.

[0038] It should be noted that if Figure 4 and Figure 6As shown, a plurality of inwardly protruding anti-recognition teeth 410 are provided at the threaded edge of one end of the locking nut 400 in the present invention, wherein the lower edge of the anti-recognition teeth 410 is a plane; it can be understood that the upper and lower side surfaces of the external thread teeth provided at the fixed end of the main body 100 are both inclined surfaces, so when the locking nut 400 is screwed, the anti-recognition teeth 410 installed at its end edge will press against the teeth of the external thread, and because the abutting surface 411 is a plane, the anti-recognition teeth 410 will be forced to deform during the screwing process of the locking nut 400. Since the anti-recognition teeth 410 have a certain elasticity, they will have a certain reaction pressure on the external thread of the main body 100. In this way, due to the increase in pressure between the external threads of the locking nut 400 and the main body 100, it will cause the two to be difficult to rotate, so that the locking nut 400 will not be easily loosened after it is installed in place.

[0039] Furthermore, a clearance groove 412 is provided on the upper side of the anti-recession tooth 410 , and the clearance groove 412 is used to make way when the anti-recession tooth 410 is bent to prevent the anti-recession tooth 410 from breaking.

[0040] In this embodiment, specifically Figures 4 to 6 As shown, in order to facilitate the deformation of the anti-retraction tooth 410 when the locking nut 400 is screwed onto the external thread of the fixed end circumference of the main body 100, a clearance groove 412 is also provided at the connection between the anti-retraction tooth 410 and the locking nut 400, and the clearance groove 412 is located on the upper side of the anti-retraction tooth 410.

[0041] It can be understood that with such an arrangement, when the locking nut 400 is mated with the main body 100 as a fixed end, since the upper and lower sides of the external thread are inclined surfaces, but the abutment surface 411 is a plane, when the abutment surface 411 contacts the external thread, the back-retraction tooth 410 will be forced to deform, and due to the setting of the giveway groove 412, the deformation of the back-retraction tooth 410 is easier, thereby preventing the back-retraction tooth 410 from being broken due to the connection between the back-retraction tooth 410 and the locking nut 400 being too hard.

[0042] Preferably, the retaining tooth 410 and the clearance groove 412 are both arc-shaped structures as a whole, and the cross-section of the clearance groove 412 is arc-shaped.

[0043] In this embodiment, the inner side surface of the anti-retraction tooth 410 is arc-shaped, so the yield groove 412 is also an arc-shaped structure. This setting is to better adapt to the external thread of the fixed end of the main body 100. It should be noted that the inner protrusion size of the anti-retraction tooth 410 is smaller than the tooth pressure height of the external thread of the fixed end of the main body 100. This is to prevent the locking nut 400 from being unable to be screwed onto the main body 100.

[0044] In addition, the cross-section of the clearance groove 412 is arc-shaped. The arc-shaped structure can reduce the stress concentration of the anti-retraction tooth 410, prevent the anti-retraction tooth 410 from being broken, and extend its service life; and the arc-shaped clearance groove 412 has lower processing difficulty and lower processing cost.

[0045] In this embodiment, the retaining teeth 410 and the locking nut 400 are integrally formed by injection molding, and the material of the retaining teeth 410 is specifically elastic nylon.

[0046] Specifically, in order to enhance the overall strength of the locking nut 400 and prevent the back-off tooth 410 from being broken during use, the back-off tooth 410 and the locking nut 400 are integrally formed by injection molding. This processing method not only has low processing difficulty, fast processing speed, and low processing cost, but also the strength of the finished product is relatively high. In addition, in this embodiment, the material used for the overall injection molding of the locking nut 400 is specifically nylon. This material not only has strong hardness, but also has certain elasticity. Using nylon to process the back-off tooth 410 can just meet its performance requirements. Of course, the locking nut 400 can also choose other materials, as long as it can achieve the expected technical effect, and this article does not make specific restrictions.

[0047] Preferably, the inner diameter edge of the locking nut 400 is evenly and pairedly provided with retaining teeth 410 .

[0048] Specific as Figure 2 、 Figure 5 and Figure 7 As shown, in order to enhance the locking effect of the locking nut 400, a plurality of stop teeth 410 can be provided at the inner edge of the thread of the locking nut 400, and the plurality of stop teeth 410 are evenly and in pairs. In this way, when the locking nut 400 is screwed onto the external thread of the main body 100, it has a good locking effect in all directions, which can further prevent the locking nut 400 from loosening.

[0049] Of course, the number and distribution positions of the anti-retraction teeth 410 can be selected according to actual conditions and are not specifically limited herein.

[0050] Preferably, the inner arc surface of the retaining tooth 410 is a conical surface, and the inner arc surface of the retaining tooth 410 gradually expands in diameter along the axial inward direction of the locking nut 400.

[0051] Specific as Figure 6 As shown, the inner arc surface of the anti-retraction tooth 410 is a conical surface relative to its axis, that is, the inner arc surface does not extend vertically downward, and its arc diameter gradually expands in the direction inward along the axis; such a setting can make the anti-retraction tooth 410 more easily screwed into the external thread on the main body 100, thereby improving the convenience of using the locking nut 400.

[0052] Preferably, the inner arc surface of the retaining tooth 410 is a vertical cylindrical surface, and the inner arc surface of the retaining tooth 410 abuts against the bottom of the external thread of the fixed end of the main body 100 .

[0053] In another embodiment, the inner arc surface of the anti-retraction tooth 410 can extend vertically downward along its axial direction, and when setting, the protruding size of the anti-retraction tooth 410 can be set to the same as the tooth depth of the external thread. In this way, when the locking nut 400 is screwed into place, the inner arc surface of the anti-retraction tooth 410 abuts against the bottom edge of the tooth of the external thread, further enhancing the stability of the locking nut 400 and preventing it from loosening.

[0054] Preferably, the abutting surface 411 is coated with an anti-slip material.

[0055] It is understandable that in another embodiment, a layer of anti-slip material can be coated on the abutment surface 411. In this way, when the locking nut 400 is installed, the presence of the anti-slip material will further increase the friction between the stop tooth 410 and the external thread, thereby further preventing the locking nut 400 from loosening.

[0056] Preferably, the retaining tooth 410 is a circular ring structure, and the abutting surface 411 is coated with a waterproof material.

[0057] It can be understood that the anti-retraction tooth 410 can be set as an annular structure, that is, the anti-retraction tooth 410 is set along the edge of the inner side of its thread and is an integrated structure, and the abutment surface 411 is coated with waterproof material, which not only enhances the fastening effect of the locking nut 400, but also prevents lobbying from flowing into the connection gap between the locking nut 400 and the main body 100.

[0058] In summary, the utility model provides a cable fixing head with a back-up stop, which provides one or more back-up stop teeth 410 at the uppermost edge of the inner thread of the locking nut 400. When the locking nut 400 is screwed and assembled to lock, the back-up stop teeth 410 are embedded in the thread, and the abutting surface 411 of the back-up stop teeth 410 presses against the inclined surface of the thread. The compressive force generated thereby prevents the rotation of the locking nut 400, thus forming a self-locking effect of limited fixation. On the basis of existing products, the design of the back-up stop teeth 410 can effectively prevent the product from loosening or falling off when subjected to external force or extreme environments of high temperature and high humidity, thereby enhancing the stability, reliability and sealing of the product, effectively preventing water or external pollution from entering the box, and ensuring the safe operation of electrical equipment.

[0059] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0060] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0061] The above is a detailed introduction to the embodiments provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the method and core concept of the present invention. It should be noted that, for those skilled in the art, without departing from the principles of the present invention, various improvements and modifications may be made to the present invention, and such improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A cable gland with a locking mechanism, characterized in that: include: A tubular body (100) having an external thread on its outer circumference, a mounting protrusion (110) protruding outward is provided on the outer circumference of the middle part of the body (100), a waterproof ring (200) is inserted into the tightening end of the body (100) and a locking nut (300) is screwed on the outer circumference, a locking nut (400) is threadedly connected to the fixed end of the body (100), and a sealing member is provided between the locking nut (400) and the mounting protrusion (110). The ring (500) is provided with at least one inwardly protruding stop tooth (410) on the inner diameter edge of one end of the locking nut (400) facing away from the mounting protrusion (110), and the stop tooth (410) includes an abutment surface (411) for pressing against the external thread of the main body (100) when the locking nut (400) is screwed onto the main body (100), the abutment surface (411) is a plane, and the stop tooth (410) is an elastic structure.

2. The cable gland according to claim 1, characterized in that: A clearance groove (412) is provided on the upper side of the anti-recession tooth (410), and the clearance groove (412) is used to make way when the anti-recession tooth (410) is bent to prevent the anti-recession tooth (410) from breaking.

3. The cable fixing head according to claim 2, characterized in that: The stop tooth (410) and the clearance groove (412) are both arc-shaped structures as a whole, and the clearance groove (412) has an arc-shaped cross section.

4. The cable gland according to claim 1, characterized in that: The anti-retraction tooth (410) and the locking nut (400) are integrally formed by injection molding, and the material of the anti-retraction tooth (410) is specifically elastic nylon.

5. The cable fixing head according to claim 1, characterized in that: The inner diameter edge of the locking nut (400) is evenly and in pairs with the retaining teeth (410).

6. The cable fixing head according to claim 3, characterized in that: The inner arc surface of the stop-recession tooth (410) is a conical surface, and the inner arc surface of the stop-recession tooth (410) gradually expands in diameter along the axial inward direction of the locking nut (400).

7. The cable fixing head according to claim 1, characterized in that: The inner arc surface of the stop-recession tooth (410) is a vertical cylindrical surface, and the inner arc surface of the stop-recession tooth (410) abuts against the bottom of the external thread of the fixed end of the main body (100).

8. The cable gland according to claim 1, characterized in that: The abutting surface (411) is coated with an anti-slip material.

9. The cable fixing head according to claim 1, characterized in that: The retaining tooth (410) is a circular ring structure, and the abutting surface (411) is coated with a waterproof material.

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