CN211508572U

CN211508572U - Cable fixing head

Info

Publication number: CN211508572U
Application number: CN202020451734.2U
Authority: CN
Inventors: 曾浩; 李小强; 曾凡乐; 韩冰; 毛天良
Original assignee: Beisit Electric Tech Hangzhou Co ltd
Current assignee: Beisit Electric Tech Hangzhou Co ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-09-15
Anticipated expiration: 2030-03-31

Abstract

The utility model discloses a cable fixing head, which comprises a fixing head main body and a sealing ring, wherein an inner hole is axially arranged on the fixing head main body in a penetrating way, the inner hole comprises a conical section, the diameter of each part of the inner peripheral surface of the conical section is gradually reduced along the axial direction and the direction of the first port close to the inner hole, and the conical section is sequentially a guide section and an extrusion section along the axial direction and the direction of the first port close to the first port; the axial section of the guide section is two axisymmetric straight line sections, the axial section of the extrusion section is two axisymmetric arc line sections, the arc line sections protrude towards the axis side of the inner hole, and the arc line sections are arranged on the radial inner side of the extension line of the butted straight line sections; the sealing ring is in extrusion fit with the conical section. The extrusion section in the fixed head main part of the cable fixed head forms an arc reinforcing structure, and the arc reinforcing structure is matched with the sealing ring in configuration, so that the clamping force and the sealing waterproof effect of the sealing ring on the cable can be increased, and the reliability of the product is improved.

Description

Cable fixing head

Technical Field

The utility model relates to an electrical equipment technical field, in particular to cable fixing head.

Background

In the field of electrical equipment such as machinery, ships, and rail transit, it is necessary to connect electrical components inside the electrical equipment by wires or cables. The wires or cables are usually connected to a cable fixing head so that the cable outlet holes are kept sealed and waterproof and dustproof, and the machine can run safely and reliably.

The existing cable fixing head comprises a fixing head main body, a packing nut and a sealing ring, during assembly, a cable is inserted into the main body of the cable fixing head, the packing nut is screwed up, the packing nut compresses the sealing ring, and the sealing ring clamps an outer insulating layer of the cable, so that the effects of clamping, water proofing and dust proofing are achieved. However, in the existing cable fixing head, the effect of radial contraction of the sealing ring is poor, and the sealing and waterproof effect is difficult to ensure.

Therefore, how to improve the sealing effect is a technical problem that needs to be solved by those skilled in the art at present.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a cable fixing head, it is better to the sealed effect of cable.

In order to achieve the above object, the utility model provides a following technical scheme:

a cable fixing head comprises a fixing head main body and a sealing ring, wherein an inner hole axially penetrates through the fixing head main body, the inner hole comprises a conical section, the diameter of each part of the inner peripheral surface of the conical section is gradually reduced along the axial direction and the direction close to a first port of the inner hole, and the conical section is sequentially a guide section and an extrusion section along the direction close to the first port in the axial direction; the axial section of the guide section is two axisymmetric straight line sections, the axial section of the extrusion section is two axisymmetric arc line sections, the arc line sections protrude towards the axis side of the inner hole, and the arc line sections are positioned on the radial inner side of the extension line of the straight line sections in butt joint; the sealing ring is in extrusion fit with the conical section.

Preferably, a cylindrical section is butted on one side of the inner hole, which is far away from the first port in the axial direction of the conical section, the inner peripheral surface of the cylindrical section is a cylindrical surface, and the conical section and the cylindrical section are coaxially arranged.

Preferably, the sealing ring comprises a conical ring, the outer peripheral surface of the conical ring is a circular table surface, and the conical ring is in extrusion fit with the conical section.

Preferably, the sealing ring further comprises a cylindrical ring butted to the large-diameter end of the conical ring, and the outer peripheral surface of the cylindrical ring is a cylindrical surface with the same diameter as the inner peripheral surface of the cylindrical section.

Preferably, the conical section and the cylindrical section are in smooth transition.

The utility model provides a cable fixing head, including fixed head main part and sealing washer, the axial is run through and is equipped with the hole in the fixed head main part, the hole includes the toper section, the inner peripheral surface of toper section diameter reduces gradually along the axial and direction of being close to the first port of hole everywhere, the toper section is guide section and extrusion section in proper order along the axial direction of being close to the first port; the axial section of the guide section is two axisymmetric straight line sections, the axial section of the extrusion section is two axisymmetric arc line sections, the arc line sections protrude towards the axis side of the inner hole, and the arc line sections are arranged on the radial inner side of the extension line of the butted straight line sections; the sealing ring is in extrusion fit with the conical section.

The extrusion section in the fixed head main part of the cable fixed head forms an arc reinforcing structure, and the arc reinforcing structure is matched with the sealing ring in configuration, so that the clamping force and the sealing waterproof effect of the sealing ring on the cable can be increased, and the reliability of the product is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is an overall structure diagram of a cable fixing head provided by the present invention;

fig. 2 is an axial sectional view of the cable fixing head provided by the present invention during the process of installing the sealing ring in the fixing head main body;

fig. 3 is a structural diagram of a fixing head main body in the cable fixing head provided by the present invention;

FIG. 4 is an axial cross-sectional view of FIG. 3;

fig. 5 is a structural diagram of a sealing ring in a cable fixing head provided by the present invention;

fig. 6 is an axial cross-sectional view of fig. 5.

Reference numerals:

1-a fixed head main body, 11-an inner hole, 12-a first port, 13-a conical section, 131-a guide section, 132-an extrusion section and 14-a cylindrical section;

2-sealing ring, 21-cylindrical ring, 22-conical ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a cable fixing head, it is better to the sealed effect of cable.

It will be understood that when an element is referred to as being "secured" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Meanwhile, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the term "first" is used for descriptive purposes only and is not to be construed as indicating or implying a relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

In one embodiment of the cable fixing head, the cable fixing head comprises a fixing head main body 1 and a sealing ring 2. An inner hole 11 is axially arranged on the fixing head main body 1 in a penetrating manner, and the inner hole 11 comprises a conical section 13, as shown in fig. 4, the conical section 13 can be specifically positioned in the middle of the inner hole 11 in the axial direction. The diameter of each part of the inner peripheral surface of the tapered section 13 is gradually reduced along the axial direction and the direction close to the first port 12 of the inner hole 11, the axial direction is the up-down direction in the orientation of fig. 1 to 6, and the lower end of the inner hole 11 is the first end.

As shown in fig. 4, the tapered section 13 is a guide section 131 and a pressing section 132 in this order in the direction axially close to the first port 12. The axial section of the guiding section 131 is two axisymmetric straight line sections, and the axial section of the extruding section 132 is two axisymmetric arc line sections. The arc line segment protrudes toward the axial center side of the inner hole 11, and the arc line segment extends downward along the extending direction of the straight line segment on the left side, as shown in fig. 4, on the radial inner side of the extending line of the straight line segment where the arc line segment is butted, and the arc line segment on the left side is completely located on the right side of the extending line (the dotted line in fig. 4).

The sealing ring 2 is in press fit with the conical section 13. When the sealing ring 2 is moved downwards by the axial force, the extruding section 132 can force the bottom of the sealing ring 2 to contract radially towards the center, so that the clamping force of the sealing ring 2 on the cable is enhanced.

In this embodiment, the extrusion section 132 in the fixing head main body 1 of the cable fixing head forms an arc reinforcing structure, and the arc reinforcing structure is matched with the configuration of the sealing ring 2, so that the clamping force and the sealing waterproof effect of the sealing ring 2 on the cable can be increased, and the reliability of the product can be improved.

Further, a cylindrical section 14 is abutted in the inner bore 11 on a side of the tapered section 13 axially away from the first port 12, and an inner peripheral surface of the cylindrical section 14 is a cylindrical surface. The conical section 13 is arranged coaxially with the cylindrical section 14. The sealing ring 2 is in extrusion fit with the conical section 13 along the axial direction sequentially through a cylindrical ring 21 and a conical ring 22. The cylindrical section 14 can well guide the sealing ring 2 to axially move in the inner hole 11, and the assembling efficiency of the sealing ring 2 is improved.

Further, the sealing ring 2 comprises a conical ring 22, the outer peripheral surface of the conical ring 22 is a circular table surface, and the conical ring 22 is in press fit with the conical section 13, so that the adaptability of the conical ring 22 and the conical section 13 is improved.

Further, referring to fig. 6, the sealing ring 2 further includes a cylindrical ring 21 abutting on the large diameter end of the conical ring 22, and the outer peripheral surface of the cylindrical ring 21 is a cylindrical surface having the same diameter as the inner peripheral surface of the cylindrical section 14. After the sealing ring 2 is installed in the inner hole 11, the cylindrical ring 21 is fit with the cylindrical section, so that the sealing effect can be further improved.

Further, the tapered section 13 and the cylindrical section 14 are rounded, e.g., rounded, to improve the smoothness of the tapered ring 22 entering the tapered section 13.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

It is right above that the utility model provides a cable fixing head has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A cable fixing head comprises a fixing head main body (1) and a sealing ring (2), wherein an inner hole (11) axially penetrates through the fixing head main body (1), and the cable fixing head is characterized in that the inner hole (11) comprises a conical section (13), the diameter of each position of the inner peripheral surface of the conical section (13) is gradually reduced along the axial direction and the direction close to a first port (12) of the inner hole (11), and the conical section (13) sequentially comprises a guide section (131) and an extrusion section (132) along the direction axially close to the first port (12); the axial section of the guide section (131) is two axisymmetric straight line sections, the axial section of the extrusion section (132) is two axisymmetric arc line sections, the arc line sections protrude towards the axis side of the inner hole (11), and the arc line sections are positioned on the radial inner side of the extension lines of the straight line sections in butt joint; and the sealing ring (2) is in extrusion fit with the conical section (13).

2. The cable fixing head according to claim 1, characterized in that a cylindrical section (14) is abutted in the inner bore (11) on a side of the tapered section (13) axially remote from the first port (12), an inner circumferential surface of the cylindrical section (14) is a cylindrical surface, and the tapered section (13) is arranged coaxially with the cylindrical section (14).

3. The cable fixing head according to claim 2, characterized in that the sealing ring (2) comprises a conical ring (22), the outer circumference of the conical ring (22) is a circular table surface, and the conical ring (22) is press-fitted with the conical section (13).

4. The cable fixing head according to claim 3, wherein the sealing ring (2) further comprises a cylindrical ring (21) abutting on the large diameter end of the tapered ring (22), and the outer circumferential surface of the cylindrical ring (21) is a cylindrical surface having the same diameter as the inner circumferential surface of the cylindrical section (14).

5. The cable fixing head according to claim 4, characterized in that the conical section (13) is rounded off from the cylindrical section (14).