Retaining cable fixing head

Abstract

The utility model discloses a retaining cable fixing head, which comprises a main body and a packing nut in threaded connection with one end of the main body, and further comprises a sealing element, the sealing element comprises a waterproof ring part located at the end part of the main body and embedded in the packing nut, and the end surface, facing the bottom surface of the packing nut, of the waterproof ring part is provided with a plurality of retaining grooves; the multiple retaining grooves are evenly distributed in the circumferential direction of the waterproof ring part, retaining teeth connected with the retaining grooves in a clamped mode are arranged on the bottom face of the packing nut, and the retaining grooves are in interference fit with the retaining teeth. By additionally arranging the retaining teeth and the retaining grooves, the problem that the packing nut is loosened due to vibration in the using process is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and in particular to a cable fixing head with a locking mechanism. Background Art

[0002] Cable glands are widely used in existing power distribution and electronic and electrical equipment fields, such as control boxes, distribution boxes, junction boxes, etc. included in electrical cabinets. Their main function is to prevent water or external pollution from entering the box and ensure the safe operation of the equipment.

[0003] At present, the existing cable glands are mainly composed of five parts: a clamping nut, a waterproof ring, a main body, a sealing ring, and a hexagonal nut. The clamping nut is threadedly connected to the main body, and the waterproof ring is pressed inside the clamping nut to achieve waterproofing. However, as the cable gland is used for a longer time, the product will have the risk of loosening due to vibration, which can easily lead to loosening of the threaded connection between the clamping nut and the main body, and then affect the sealing of the clamping nut and the waterproof ring.

[0004] Therefore, in view of the above technical problems, how to prevent the locking nut from loosening due to vibration is a technical problem that technical personnel in this field need to solve. Utility Model Content

[0005] The purpose of the present application is to provide a cable fixing head with a locking mechanism, which can effectively avoid the problem of loosening of the locking nut due to vibration during use by adding locking teeth and locking grooves.

[0006] To achieve the above-mentioned purpose, the present application provides a cable fixing head with a back-moving stop, including a main body and a locking nut threadedly connected to one end of the main body, and also including a sealing member, wherein the sealing member includes a waterproof ring portion located at the end of the main body and embedded in the locking nut, and a plurality of back-moving stop grooves are provided on the end surface of the waterproof ring portion facing the bottom surface of the locking nut, and the plurality of back-moving stop grooves are evenly distributed along the circumference of the waterproof ring portion, and a back-moving stop tooth engaged with the back-moving stop groove is provided on the bottom surface of the locking nut, and the back-moving stop groove and the back-moving stop tooth are interference fit.

[0007] Preferably, the number of the anti-recession teeth is at least two, which are evenly distributed along the circumference of the bottom surface of the locking nut, and the number of the anti-recession teeth is consistent with the number of the anti-recession grooves and corresponds one to one.

[0008] Preferably, the number of the anti-retreat teeth is at least two, which are evenly distributed along the circumference of the bottom surface of the locking nut, the number of the anti-retreat grooves is twice the number of the anti-retreat teeth, and each of the anti-retreat teeth has a corresponding anti-retreat groove.

[0009] Preferably, the sealing member further comprises a sealing ring portion and a connecting portion connecting the sealing ring portion and the waterproof ring portion, and the sealing ring portion, the connecting portion and the waterproof ring portion are integrally formed;

[0010] The inner wall of the main body is provided with a placement groove corresponding to the connecting portion, the main body is provided with a raised ring, the raised ring is provided with a through hole connected to the placement groove, and the outer wall of the raised ring is provided with a clamping groove connected to the through hole;

[0011] The sealing ring portion comprises:

[0012] A penetration piece, connected to the connecting portion, passing through the through hole and having an interference fit therewith;

[0013] An extension piece, connected to the penetration piece, embedded in the slot, and extending toward the bottom of the raised ring;

[0014] The ring member is located at the bottom of the raised ring and is connected to the extension member.

[0015] Preferably, an extension piece is provided at a position of the ring member different from the extension piece, the extension piece is filled in the slot, and a reinforcing rib is connected between two adjacent extension pieces located on the same side of the extension piece, a reinforcement hole for passing the reinforcing rib is provided inside the raised ring, and the reinforcing rib is interference fit with the reinforcement hole.

[0016] Preferably, the number of the connecting parts is two and they are symmetrically distributed on both sides of the waterproof ring part. Along the direction from the waterproof ring part to the sealing ring part, the accommodating space of the placement groove gradually decreases, and the connecting part fits with the placement groove so that the main body forms a columnar inner wall.

[0017] Preferably, it further comprises a hexagonal nut, wherein the hexagonal nut is threadedly connected to an end of the main body away from the locking nut, and the ring is located between the raised ring and the hexagonal nut.

[0018] Preferably, the main body includes a clamping claw portion arranged facing the waterproof ring portion, and a plurality of the clamping claw portions are provided. Each of the clamping claw portions is distributed on the same circumference with the axis of the main body as the center, and the clamping claw portions are embedded in the waterproof ring portion.

[0019] Preferably, the clamping jaw portion is provided with a reinforcing boss, and each of the reinforcing bosses extends along the circumference of the main body.

[0020] Preferably, the main body and the locking nut are made of plastic material, the sealing element is made of rubber material, and the main body and the sealing element are injection-molded into an integral structure using a hydraulic injection molding process.

[0021] Compared with the above background technology, the present application adds a back-stopping tooth on the inner bottom surface of the clamping nut and a back-stopping groove on the top end surface of the waterproof ring. The back-stopping tooth cooperates with the back-stopping groove. During the process of screwing the clamping nut, the back-stopping tooth gradually approaches the back-stopping tooth until the back-stopping tooth is engaged in the back-stopping groove. At this time, the back-stopping tooth and the back-stopping groove are engaged, which can effectively prevent the clamping nut from loosening and falling off due to vibration. At the same time, the clamping nut and the waterproof ring have an interference fit, and the back-stopping groove and the back-stopping tooth have an interference fit, which can ensure the sealing between the clamping nut and the waterproof ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the exploded structure of a cable fixing head provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the front structure of a cable fixing head provided in an embodiment of the present application;

[0025] Figure 3 for Figure 2 Vertical half-section diagram;

[0026] Figure 4 A schematic diagram of the internal structure of a locking nut provided in an embodiment of the present application;

[0027] Figure 5 A schematic diagram of the three-dimensional structure of a seal provided in an embodiment of the present application;

[0028] Figure 6 A schematic diagram of the main cross-sectional structure provided in an embodiment of the present application;

[0029] Figure 7 A schematic diagram of the main three-dimensional structure provided in the embodiment of the present application;

[0030] Figure 8 This is a vertical half-section schematic diagram of the main body retaining cable fixing head provided in an embodiment of the present application.

[0031] In the figure: 1, locking nut 101, backstop tooth 2, sealing member 201, waterproof ring portion 202, connecting portion 203, penetration member 204, extension member 205, ring member 206, backstop groove 207, extension member 208, reinforcing rib 3, main body 301, mounting groove 302, raised ring 303, through hole 304, slot 305, clamping claw portion 306, reinforcing boss 4, hexagonal nut. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper", "lower", "front", "back", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] like Figure 1 As shown, in this embodiment, a cable fixing head with a stopper is provided, which includes a main body 3, a locking nut 1 and a sealing member 2. The middle of the main body 3 is hollow, which is convenient for inserting the cable therein; the sealing member 2 includes a waterproof ring portion 201 located at the end of the main body 3 and embedded in the locking nut 1, please refer to Figure 3 The waterproof ring 201 is also hollow, and the cable can be inserted into the waterproof ring 201. The locking nut 1 is threadedly connected to one end of the main body 3, thereby maintaining an interference fit with the sealing member 2, thereby achieving a sealing and waterproofing effect.

[0036] It should be noted that due to the interference fit between the locking nut 1 and the seal 2, the seal 2 will generate an outward reverse force on the locking nut 1. If there is vibration during the use, it will be very easy for the locking nut 1 to be loosened outward, causing it to fall off. Therefore, the present application provides a plurality of stop grooves 206 on the end surface of the waterproof ring 201 facing the bottom surface of the locking nut 1, please refer to Figure 5The bottom surface of the locking nut 1 is provided with a locking tooth 101 that engages with the locking groove 206. Please refer to Figure 4 Therefore, when the locking nut 1 is gradually tightened, the top of the waterproof ring 201 will be gradually compressed until there is a moment when the back-stop tooth 101 is stuck in the back-stop groove 206. At this time, the cooperation between the back-stop tooth 101 and the back-stop groove 206 will make it difficult to loosen the locking nut 1, thereby overcoming the problem of the locking nut 1 falling off randomly due to vibration.

[0037] It should be noted that the anti-recessing groove 206 is evenly distributed along the circumference of the waterproof ring 201, and the number can be one or more; in the case of one anti-recessing groove 206, one anti-recessing tooth 101 or multiple anti-recessing teeth 101 can be provided, and there is a situation in which only one anti-recessing tooth 101 is provided, that is, only when the clamping nut 1 rotates one circle, the anti-recessing tooth 101 can cooperate with the anti-recessing groove 206 again, which requires a high rotation accuracy of the clamping nut 1, but the anti-recessing effect of the clamping nut 1 can also be achieved. If multiple anti-recessing teeth 101 are provided, only one anti-recessing tooth 101 can enter the anti-recessing groove 206, and the other anti-recessing teeth 101 will be squeezed with the end face of the waterproof ring 201 for a long time, which may easily cause the waterproof ring 201 to deform and fail, etc. When adjusted again, the anti-recessing tooth 101 may leave a certain degree of dent on the waterproof ring 201, affecting the waterproof effect.

[0038] In the case where there are multiple anti-recession grooves 206, the anti-recession teeth 101 can also be set to one or more. One anti-recession tooth 101 can cooperate with each anti-recession tooth 101 in turn by rotating the clamping nut 1, so as to achieve the anti-recession effect; however, considering the waterproof effect of the clamping nut 1 and the waterproof ring 201, the number of anti-recession grooves 206 and anti-recession teeth 101 is kept consistent as much as possible. It should be pointed out that even if the number of anti-recession teeth 101 is less than the number of anti-recession grooves 206, due to the overall interference fit between the clamping nut 1 and the waterproof ring 201, there will be no sealing failure. Here, it is just to ensure a more efficient and stable sealing effect as much as possible.

[0039] Then, compared with the case of one anti-recoil tooth 101, multiple anti-recoil teeth 101 cooperate with the anti-recoil groove 206 to enhance the anti-recoil effect of the tightening nut 1; that is, one anti-recoil tooth 101 has only one clamping point, while multiple anti-recoil teeth 101 can have multiple clamping points, thereby improving the anti-recoil effect.

[0040] In addition, the present application has further optimized the number of anti-recession teeth 101 and anti-recession grooves 206, that is, the number of anti-recession teeth 101 is at least two, which are evenly distributed along the circumference of the bottom surface of the locking nut 1, and the number of anti-recession grooves 206 is twice the number of anti-recession teeth 101, so that while ensuring a high-strength anti-recession effect, the locking nut 1 does not need to be rotated one circle to achieve the engagement between the anti-recession teeth 101 and the anti-recession grooves 206 again; in other words, for example, if the number of anti-recession grooves 206 is eight and the number of anti-recession teeth 101 is four, then it is only necessary to rotate the locking nut 1 45° to achieve the engagement with the anti-recession grooves 206 again. Similarly, in the case of four anti-recession grooves 206 and two anti-recession teeth 101, the locking nut 1 needs to be rotated 90° to achieve the next engagement with the anti-recession grooves 206. These will not be described in detail here, and it is sufficient to ensure that the anti-recession teeth 101 have more options for cooperating with the anti-recession grooves 206.

[0041] It should be noted that, for the specific shapes of the backstop teeth 101 and the backstop groove 206, both sides thereof can be set as inclined surfaces or arc surfaces, and the backstop groove 206 and the backstop teeth 101 have corresponding shapes, so that the backstop teeth 101 can rotate in the case of interference fit with the end face of the waterproof ring 201, and at the same time, the engagement between the backstop teeth 101 and the backstop groove 206 is more convenient. It should be pointed out that, since the clamping nut 1 has not only a tightening state but also a loosening state, in order to enable the clamping nut 1 to be loosened from the main body 3 by external force, the backstop teeth 101 and the backstop groove 206 here only need to complete the engagement and be in an interference fit state, and it is not necessary to completely jam the backstop teeth 101 in the backstop groove 206, so that the clamping nut 1 cannot be loosened.

[0042] In summary of the above embodiments, the present application adds a backstop tooth 101 on the inner bottom surface of the clamping nut 1, adds a backstop groove 206 on the top end surface of the waterproof ring 201, and the backstop tooth 101 cooperates with the backstop groove 206. During the process of screwing the clamping nut 1, the backstop tooth 101 gradually approaches the backstop groove 206 until the backstop tooth 101 is engaged in the backstop groove 206. At this time, under the engagement of the backstop tooth 101 and the backstop groove 206, the clamping nut 1 can be effectively prevented from loosening and falling off due to vibration. At the same time, the clamping nut 1 and the waterproof ring 201 have an interference fit, and the backstop groove 206 and the backstop tooth 101 have an interference fit, which can ensure the sealing between the clamping nut 1 and the waterproof ring 201.

[0043] In addition, the sealing member 2 further comprises a sealing ring portion, and a connecting portion 202 connecting the sealing ring portion and the waterproof ring portion 201. The sealing ring portion, the connecting portion 202, and the waterproof ring portion 201 are integrally formed. Figure 6The inner wall of the main body 3 is provided with a placement groove 301 corresponding to the connection part 202, and then the main body 3 protects the connection part 202 in the placement groove 301. During the use of the cable fixing head provided in this embodiment, the connection part 202 is prevented from being broken by external forces, thereby improving the overall service life of the cable fixing head provided in this embodiment. The main body 3 is provided with a raised ring 302, and the raised ring 302 is provided with a through hole 303 connected to the placement groove 301, and the outer wall of the raised ring 302 is provided with a slot 304 connected to the through hole 303.

[0044] The sealing ring portion includes a penetration member 203, an extension member 204 and a ring member 205. Figure 3 and Figure 5 There are two connecting parts 202, which are symmetrically distributed on both sides of the waterproof ring part 201. The penetration piece 203 is connected to the connecting part 202, penetrates the through hole 303, and has an interference fit with it; the extension piece 204 is connected to the penetration piece 203, embedded in the card slot 304, and extends toward the bottom of the raised ring 302; the ring piece 205 is located at the bottom of the raised ring 302 and connected to the extension piece 204. On this basis, the raised ring 302 can be embedded in the groove of the sealing ring, and the bottom of the raised ring 302 can be sealed by the ring piece 205 at the same time, which not only realizes the connection between the main body 3 and the sealing ring part, but also makes the connection structure between the sealing ring part and the main body 3 simple and convenient.

[0045] It should be noted that the main body 3 and the locking nut 1 are made of plastic material, and the seal 2 is made of rubber material. The main body 3 and the seal 2 are injection molded into an integrated structure using a hydraulic injection molding process, that is, the main body 3 is first processed and formed in a mold. During the hydraulic injection molding process, the rubber material flows into the mounting groove 301 to form the connecting portion 202 and flows out through the through hole 303 to form a sealing ring portion in the mold.

[0046] In addition, in order to improve the sealing effect of the main body 3 and the integration effect with the sealing member 2, an extension member 207 is provided at a position of the ring member 205 different from the extension member 204, please refer to Figure 2 and Figure 5 The extension piece 207 is also filled in the card groove 304, and a reinforcing rib 208 is connected between two adjacent extension pieces 207 located on the same side of the extension piece 204. A reinforcement hole for passing the reinforcing rib 208 is provided inside the raised ring 302, and the reinforcing rib 208 is interference fit with the reinforcement hole, thereby further improving the sealing effect at the contact surface between the main body 3 and the seal 2, and further improving the integration effect of the main body 3 and the seal 2.

[0047] It should be pointed out that, along the direction from the waterproof ring portion 201 to the sealing ring portion, the accommodating space of the mounting groove 301 is gradually reduced, and the connecting portion 202 is matched with the mounting groove 301 so that the main body 3 forms a columnar inner wall; at the same time, while ensuring the stability of the connection between the waterproof ring portion 201 and the sealing ring portion through the connecting portion 202, the influence of the opening of the mounting groove 301 on the structural strength of the main body 3 is reduced, so as to avoid the problem that the thickness of the cavity wall of the main body 3 is reduced and possible breakage due to the larger mounting groove 301.

[0048] The present application also includes a hexagonal nut 4, which is threadedly connected to the end of the main body 3 away from the locking nut 1, please refer to Figure 8 When the hexagonal nut 4 is installed on the main body 3, the ring member 205 of the sealing ring part is pressed and fastened through the cooperation between the hexagonal nut 4 and the raised ring 302, and the sealing ring part is further fixed to enhance the stability of the connection of the sealing ring part on the main body 3. At the same time, the sealing ring part plays a sealing role on the connection between the hexagonal nut 4 and the main body 3.

[0049] In addition, please refer to Figure 6 and Figure 7 The main body 3 includes a clamping claw portion 305 arranged in the direction of the waterproof ring portion 201. There are multiple clamping claw portions 305. Each clamping claw portion 305 is spaced and distributed on the same circumference with the axis of the main body 3 as the center. When the cable passes through the inner cavity of the main body 3, pressure is applied to the clamping claw portion 305 through the tightening nut 1, so that each clamping claw portion 305 is retracted toward the inner cavity of the main body 3, and then the cable is compressed to fix the cable. The waterproof ring portion 201 of the sealing member 2 is located between the tightening nut 1 and the cable to play a role in sealing and waterproof infiltration, and each clamping claw portion 305 is connected to the waterproof ring portion 201 by embedding. The main body 3, the clamping claw portion 305, and the sealing member 2 provided in this embodiment are an integrated structure, which not only reduces the number of overall parts of the cable fixing head and improves the work efficiency of use and installation, but also improves the stability, compactness and strength of the structure, thereby improving the reliability of the overall structure and reducing the problem of loosening of the cable fixing head during use.

[0050] A reinforcing boss 306 is provided at the end of the clamping jaw 305. When the clamping jaw 305 is connected to the waterproof ring 201, the reinforcing boss 306 of the clamping jaw 305 is embedded in the waterproof ring 201, increasing the contact area between the clamping jaw 305 and the waterproof ring 201, thereby reinforcing the reliability and stability of the connection between the clamping jaw 305 and the waterproof ring 201, so that the clamping jaw 305 and the waterproof ring 201 are not easily separated from each other. In a specific embodiment, each reinforcing boss 306 extends along the circumference of the main body 3, and the extension direction of each reinforcing boss 306 is the same, or those skilled in the art can design the relevant structures of each reinforcing boss 306 according to actual needs, which will not be listed one by one in this article.

[0051] 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.

[0052] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A cable fixing head, comprising a main body and a locking nut threadedly connected to one end of the main body, characterized in that: It also includes a sealing member, which includes a waterproof ring portion located at the end of the main body and embedded in the clamping nut, and a plurality of retaining grooves are provided on the end surface of the waterproof ring portion facing the bottom surface of the clamping nut, and the plurality of retaining grooves are evenly distributed along the circumference of the waterproof ring portion, and a retaining tooth engaged with the retaining groove is provided on the bottom surface of the clamping nut, and the retaining groove and the retaining tooth are interference fit.

2. The cable fixing head according to claim 1, characterized in that: The number of the anti-recession teeth is at least two, which are evenly distributed along the circumference of the bottom surface of the locking nut. The number of the anti-recession teeth is consistent with the number of the anti-recession grooves and corresponds one to one.

3. The cable fixing head according to claim 1, characterized in that: The number of the anti-retreat teeth is at least two and is evenly distributed along the circumference of the bottom surface of the locking nut. The number of the anti-retreat grooves is twice the number of the anti-retreat teeth, and each anti-retreat tooth has a corresponding anti-retreat groove.

4. The cable fixing head according to claim 1, characterized in that: The sealing member further comprises a sealing ring portion and a connecting portion connecting the sealing ring portion and the waterproof ring portion, wherein the sealing ring portion, the connecting portion and the waterproof ring portion are integrally formed; The inner wall of the main body is provided with a placement groove corresponding to the connecting portion, the main body is provided with a raised ring, the raised ring is provided with a through hole connected to the placement groove, and the outer wall of the raised ring is provided with a clamping groove connected to the through hole; The sealing ring portion comprises: A penetration piece, connected to the connecting portion, passing through the through hole and having an interference fit therewith; An extension piece, connected to the penetration piece, embedded in the slot, and extending toward the bottom of the raised ring; The ring member is located at the bottom of the raised ring and connected to the extension member.

5. The cable fixing head according to claim 4, characterized in that: An extension piece is arranged at a position of the ring piece different from the extension piece, the extension piece is filled in the slot, and a reinforcing rib is connected between two adjacent extension pieces located on the same side of the extension piece, a reinforcement hole for passing the reinforcing rib is arranged inside the raised ring, and the reinforcing rib is interference fit with the reinforcement hole.

6. The cable fixing head according to claim 4, characterized in that: There are two connecting parts, which are symmetrically distributed on both sides of the waterproof ring. Along the direction from the waterproof ring to the sealing ring, the accommodating space of the placement groove gradually decreases. The connecting part fits with the placement groove so that the main body forms a columnar inner wall.

7. The cable fixing head according to claim 4, characterized in that: It also includes a hexagonal nut, which is threadedly connected to an end of the main body away from the locking nut, and the ring is located between the raised ring and the hexagonal nut.

8. The cable fixing head according to any one of claims 1 to 7, characterized in that: The main body comprises a clamping claw part arranged in the direction of the waterproof ring part, and a plurality of the clamping claw parts are arranged. Each of the clamping claw parts is distributed on the same circumference with the axis of the main body as the center, and the clamping claw parts are embedded in the waterproof ring part.

9. The cable fixing head according to claim 8, characterized in that: The clamping jaw portion is provided with a reinforcing boss, and each of the reinforcing bosses extends along the circumference of the main body.

10. The cable fixing head according to claim 8, characterized in that: The main body and the locking nut are made of plastic material, the sealing element is made of rubber material, and the main body and the sealing element are injection-molded into an integrated structure by a hydraulic injection molding process.

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