Dispersing type cable fitting terminal stress cone

Abstract

The utility model discloses a dispersed cable fitting terminal stress cone, and relates to the technical field of cable terminal heads. The cable terminal comprises three cable terminals and further comprises three groups of stress dispersion assemblies, each group of stress dispersion assembly comprises a stress cone, the stress cone is fixed in the cable terminal and used for dispersing stress, a shielding layer is fixed on the cable terminal, and the upper end and the lower end of the shielding layer extend out of the stress cone. The stress cone sleeves the surface of the shielding layer; the three shielding layers are formed by tinned copper twill weaving. The conical surface design of the stress cone body enables the distribution uniformity of radial stress to be improved, and the service life of the cable terminal head can be effectively prolonged in cooperation with the deformation absorption effect of the elastic shielding layer.

Description

Technical Field

[0001] The utility model belongs to the technical field of cable terminal heads, in particular to a dispersed cable hardware terminal stress cone. Background Art

[0002] The cold shrink cable terminal head is made of elastomeric materials (commonly used are silicone rubber and EPDM rubber) which are injection vulcanized in the factory, and then expanded and lined with plastic spiral supports to form components of various cable accessories.

[0003] A stress cone is set inside the cable terminal head to disperse the stress, thereby effectively protecting the stability of the cable terminal. However, the effect of a single stress cone in dispersing stress is limited and cannot effectively guarantee the service life of the cable terminal head. At the same time, in order to maintain stability between the cable terminal heads, they usually need to be connected and tied with straps, but the operation is cumbersome and the stability of the connection cannot be guaranteed.

[0004] In view of the above problems, the utility model document proposes a decentralized cable fitting terminal stress cone. Utility Model Content

[0005] The purpose of the utility model is to provide a dispersed cable hardware terminal stress cone. The conical surface design of the stress cone improves the uniformity of radial stress distribution. Combined with the deformation absorption effect of the elastic shielding layer, it can effectively extend the service life of the cable terminal head and solve the existing technical problems.

[0006] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0007] A dispersed cable fitting terminal stress cone includes three cable terminal heads and also includes:

[0008] Three groups of stress dispersion components, each group of stress dispersion components includes a stress cone, the stress cone is fixed in the cable terminal head for dispersing stress, a shielding layer is fixed in the cable terminal head, the upper and lower ends of the shielding layer extend to the upper and lower ends of the stress cone, and the stress cone is sleeved on the surface of the shielding layer;

[0009] Wherein, the three shielding layers are all woven from tinned copper twill;

[0010] A connecting ring is arranged between three cable terminal heads, three L-shaped clamps are fixed on the surface of the connecting ring, and accommodation gaps are formed between the three L-shaped clamps and the connecting ring. The three cable terminal heads are respectively arranged in the three accommodation gaps. A group of positioning components is provided in the connecting ring, and the positioning components are used to fix the three cable terminal heads.

[0011] Optionally, the positioning assembly includes three first grooves provided in the connecting ring, trapezoidal clamping blocks for clamping the cable terminal head sliding in the three first grooves, sliding grooves provided in the three trapezoidal clamping blocks, fixing plates sliding in the three sliding grooves, the three fixing plates being fixed in the three first grooves respectively, a second groove connected to the three first grooves provided in the connecting ring, an extrusion plate sliding in the second groove, the extrusion plate being in extrusion contact with the inclined surfaces of the three trapezoidal clamping blocks respectively, a limiting ring fixed in the second groove, a nut fixed in the limiting ring, a screw connected to the inner thread of the nut, and the screw rotating on the top of the extrusion plate.

[0012] Optionally, rubber pads are fixedly provided at the ends of the three trapezoidal clamping blocks that are away from each other.

[0013] Optionally, springs are fixed to adjacent ends of the three fixing plates, and the three springs are respectively fixed in three sliding grooves.

[0014] Optionally, the side ends of the three L-shaped clamps are fixed with limiting plates for limiting the accommodating gap.

[0015] Optionally, a screw ring is fixed to the top end of the screw.

[0016] In the present application, a shielding layer is fixedly arranged in the cable terminal head, and the upper and lower ends of the shielding layer extend beyond the stress cone. The copper shielding tape is used as an equipotential body. Adding a shielding layer between the cable and the stress cone can effectively form a continuous conductive surface with the cable shielding layer, significantly reducing the tangential electric field strength of the inner wall of the stress cone.

[0017] Furthermore, by setting three L-shaped clamps on the surface of the connecting ring, three accommodating gaps for placing cable terminal heads are formed on the surface of the connecting ring. After the three cable terminal heads are placed in the three accommodating gaps respectively, the screw can be turned. Since the position of the nut is fixed, the screw is turned, and the screw is relatively displaced in the nut. The screw drives the extrusion plate to relatively displace downward, thereby squeezing the inclined surfaces of the three trapezoidal clamping blocks, so that the three trapezoidal clamping blocks are squeezed into the three accommodating gaps respectively, which can quickly and effectively fix the three cable terminal heads in the accommodating gaps, thereby realizing the positioning of the three cable terminal heads.

[0018] In the utility model, the dispersed cable hardware terminal stress cone, the cone surface design of the stress cone body improves the uniformity of radial stress distribution, and cooperates with the deformation absorption effect of the elastic shielding layer, which can effectively extend the service life of the cable terminal head;

[0019] In this technical solution, the positioning component adopts a screw-driven self-locking structure, which shortens the installation time of a single terminal and makes the operation more convenient.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is the main stereoscopic view in the utility model;

[0023] Figure 2 It is the first partial cross-sectional view in the utility model;

[0024] Figure 3 This is the second partial cross-sectional view of the present invention.

[0025] In the figure: 1. cable terminal head; 2. stress cone; 3. shielding layer; 4. connecting ring; 5. L-shaped clamping plate; 6. limiting plate; 7. first groove; 8. trapezoidal clamping block; 9. fixing plate; 10. slide groove; 11. spring; 12. second groove; 13. extrusion plate; 14. limiting ring; 15. nut; 16. screw. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be understood that the terms "opening", "upper", "middle", "length", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0029] Embodiment 1

[0030] See also Figure 1-Figure 3As shown, in this embodiment, a cable fitting terminal stress cone is provided, which includes three cable terminal heads 1, three groups of stress dispersion components, a connecting ring 4 and a positioning component. A stress cone 2 is fixedly installed inside each cable terminal head 1 by hot melt adhesive, and a shielding layer 3 is sleeved on the outer surface. The shielding layer 3 is made of tinned copper wire through a twill weaving process, and the upper and lower ends extend beyond the stress cone 2 by 20mm-30mm respectively. The connecting ring 4 is located between the three cable terminal heads 1, and three L-shaped clamps 5 are welded and fixed on its surface. The L-shaped clamps 5 and the connecting ring 4 form an accommodating gap, and the three cable terminal heads 1 are respectively embedded in the corresponding accommodating gaps;

[0031] The stress cone 2 is made of highly elastic rubber material, and its cone surface is fixed to the inner wall of the cable terminal head 1 by vulcanization process. The braiding parameters of the shielding layer 3 are: copper wire diameter 0.3mm, braiding density 85%, tinning layer thickness 8μm-12μm. The axial coverage length of the shielding layer 3 on the cable terminal head 1 is 150mm-200mm, ensuring that it maintains synchronous deformation with the stress cone 2 during thermal expansion and contraction;

[0032] The positioning assembly includes three trapezoidal clamping blocks 8, a fixing plate 9, an extrusion plate 13 and a screw 16. Each trapezoidal clamping block 8 is slidably connected to the fixing plate 9 through a slide groove 10, the screw 16 is threadedly connected to the nut 15, the nut 15 is fixed in the limiting ring 14, and the fixing plate 9 is welded to the first groove 7 of the connecting ring 4. The extrusion plate 13 is arranged in the second groove 12, and its conical surface contacts the inclined surfaces of the three trapezoidal clamping blocks 8. When the screw 16 is rotated, the extrusion plate 13 moves axially along the second groove 12, pushing the trapezoidal clamping block 8 to radially contract toward the cable terminal head 1 to achieve clamping and fixing.

[0033] Embodiment 2

[0034] Improved on the basis of embodiment 1: Refer to attached Figure 1 , a cable fitting terminal stress, a compression spring 11 is installed between the fixing plate 9 and the slide groove 10, which is convenient for tightening the three trapezoidal clamping blocks 8, making it easier for the cable terminal head 1 to be placed in the accommodating gap;

[0035] The limiting plate 6 of the L-shaped clamping plate 5 is formed by a bending process, and forms an angle with the surface of the connecting ring 4 to limit the axial displacement of the cable terminal head 1 .

[0036] It should be noted that, in the description of this specification, descriptions such as "first", "second", etc. are merely used to distinguish between various features and have no actual order or directional meaning, and this application is not limited to this.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A distributed cable fitting terminal stress cone, comprising three cable terminal heads (1), characterized in that: Also includes: Three groups of stress dispersion components, each group of the stress dispersion components comprises a stress cone (2), the stress cone (2) is fixed in the cable terminal head (1) for dispersing stress, a shielding layer (3) is fixed in the cable terminal head (1), the upper and lower ends of the shielding layer (3) extend above and below the stress cone (2), and the stress cone (2) is sleeved on the surface of the shielding layer (3); The three shielding layers (3) are all woven from tinned copper twill; A connecting ring (4) is arranged between three cable terminal heads (1); three L-shaped clamping plates (5) are fixed on the surface of the connecting ring (4); accommodation gaps are formed between the three L-shaped clamping plates (5) and the connecting ring (4); the three cable terminal heads (1) are respectively arranged in the three accommodation gaps; a group of positioning components is arranged in the connecting ring (4); the positioning components are used to fix the three cable terminal heads (1).

2. A distributed cable fitting terminal stress cone as claimed in claim 1, characterized in that: The positioning assembly comprises three first grooves (7) provided in the connecting ring (4), a trapezoidal clamping block (8) for clamping the cable terminal head (1) being slidably provided in the three first grooves (7), a sliding groove (10) being provided in the three trapezoidal clamping blocks (8), a fixing plate (9) being slidably provided in the three sliding grooves (10), the three fixing plates (9) being fixed in the three first grooves (7) respectively, a second groove (12) being provided in the connecting ring (4) and being connected to the three first grooves (7), a pressing plate (13) being slidably provided in the second groove (12), the pressing plate (13) being in pressing contact with the inclined surfaces of the three trapezoidal clamping blocks (8) respectively, a limiting ring (14) being fixed in the second groove (12), a nut (15) being fixed in the limiting ring (14), a screw rod (16) being internally threadedly connected to the nut (15), the screw rod (16) being rotated on the top end of the pressing plate (13).

3. A distributed cable fitting terminal stress cone as claimed in claim 2, characterized in that: Rubber pads are fixedly provided at the ends of the three trapezoidal clamping blocks (8) that are separated from each other.

4. A distributed cable fitting terminal stress cone as claimed in claim 2, characterized in that: Springs (11) are fixed to adjacent ends of the three fixing plates (9), and the three springs (11) are respectively fixed in three sliding grooves (10).

5. A distributed cable fitting terminal stress cone as claimed in claim 2, characterized in that: Limiting plates (6) for limiting the accommodating gap are fixed to the side ends of the three L-shaped clamping plates (5).

6. A distributed cable fitting terminal stress cone as claimed in claim 2, characterized in that: A twist ring is fixed to the top end of the screw rod (16).

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