CN106033847A - cold joint - Google Patents

Abstract

The invention provides a cold joint, which comprises a first main body part and a second main body part which are detachably connected; a cavity with an opening at one end is arranged in the first main body part, and a twisted wire part is arranged on the bottom wall of the first main body part opposite to the opening; the second main body part is provided with a through hole, and the projection of the through hole is positioned on the bottom wall of the first main body part, which is provided with the twisted wire part. The cold joint changes the existing installation mode of using the cold cutting pliers clamp into a screwing installation mode, and the cold joint can be thickened properly because the cold cutting pliers are not used, so that the cold joint meets the safety requirement on one hand, and the problem of breaking the cold joint by clamping can be avoided on the other hand.

Description

cold joint

technical field

The invention relates to the field of assembly, in particular to a cold joint often used in the assembly process.

Background technique

At present, three employees are generally used for the installation of the cold joints used in the assembly process, one for wiring, one for the cold joints, and one for the sleeves or egg shells of the cold joints (because the current cold joints are relatively thin and touch The inner wall of the product will cause the pressure resistance performance to fail to meet the requirements of safety regulations); and the current cold joints are often found to be broken during use, and there are also phenomena such as untightening and copper wire leakage, which have certain safety and after-sales Complain about hidden dangers. In short, the cold joints currently used have the following disadvantages: (1) The wall is thin and cannot meet the safety requirements, and it needs to be used together with egg shells and casings; (if the cold joint is too thick, the cold cutting pliers cannot clamp , unable to operate); (2) easy to pinch, the air pressure of the production line is unstable, and excessive force may easily cause the cold joint to pinch; (3) the cold cutting pliers used are dangerous to a certain extent, and belong to special positions, and the pliers have a limited lifespan (4) The operating process is more complicated and the beat is slow; (5) The phenomenon of copper wire leakage is prone to occur. Therefore, the range of use of the existing cold joint is limited, and its use cost and quality cost are relatively high.

Contents of the invention

In view of the above-mentioned problems of high cost of use and quality of the cold joint, the purpose of the present invention is to provide a new cold joint, which is easy to install and meets the requirements of safety regulations.

Technical scheme of the present invention is as follows:

A cold joint comprising a first body portion and a second body portion detachably connected;

A cavity with an open end is provided inside the first main body part, and a twisted wire part is provided on the bottom wall of the first main body part opposite to the opening;

The second body part is provided with a through hole, and the projection of the through hole on the first body part along the axial direction of the through hole is located at the part of the first body part where the strand part is provided. on the bottom wall.

In one of the embodiments, the twisted part is a plurality of twisted teeth, and one end of the twisted teeth is fixed on the bottom wall; the shape of the twisted teeth is a sickle shape, a crescent shape, a double crescent shape, a spring shape or double helix.

In one of the embodiments, the first main body part and the second main body part are screwed together.

In one of the embodiments, the first body part includes a receiving part and a connecting part, the cavity is arranged in the receiving part, the connecting part is arranged at the open end of the cavity, and the connecting part The inner diameter of the second body part is adapted to the outer diameter;

An internal thread is provided on the connecting portion, an external thread matched with the internal thread is provided on the second main body, and the first main body and the second main body pass through the internal thread Connect with the external thread.

In one of the embodiments, the second main body part includes a clamping part and a connecting part connected to each other, and the inner diameter of the connecting part is adapted to the outer diameter of the first main body part;

An internal thread is provided on the connecting part, an external thread matched with the internal thread is provided on the first main body part, and the first main body part and the second main body part pass through the internal thread Connect with the external thread.

In one of the embodiments, a vacant thread is provided at the bottom of the internal thread or the external thread to prevent back-rotation of the first body part and the second body part.

In one of the embodiments, a protrusion is provided on the inner side wall of the first main body;

A protruding part is provided on the second main body part; when the first main body part and the second main body part are screwed together, the protruding part presses the protruding part.

In one of the embodiments, both the protruding part and the protruding part are ring-shaped.

In one embodiment, the surface of the protruding portion in contact with the protruding portion is an inclined surface; the inclined surface of the protruding portion is inclined in a direction away from the strand portion.

In one of the embodiments, the surface of the protruding part that is in contact with the protruding part is an inclined surface, and the inclined surface of the protruding part is inclined in a direction approaching the second main body part.

In one of the embodiments, the inner diameter of the through hole of the extension portion gradually decreases along a direction approaching the first main body portion.

The beneficial effects of the present invention are:

(1) The cold joint of the present invention changes the existing installation method of using cold cutting clamps into a screw-on installation method by setting the cold joint separately, and the cold joint of the present invention can be used because the cold cutting clamp is not used. Appropriately thickened, so that on the one hand, it meets the requirements of safety regulations, and on the other hand, it can avoid the problem of pinching cold joints;

(2) After changing the installation method, labor is saved in the use cost, and the cold cutter is not needed, which reduces the installation cost;

(3) The operation process is simplified and the assembly efficiency is improved;

(4) The cold joint of the present invention avoids the problem of exposed copper wires.

Description of drawings

Fig. 1 is the overall schematic diagram of an embodiment of the cold joint of the present invention;

FIG. 2 is a schematic top view of the cold joint shown in FIG. 1 .

detailed description

In order to make the purpose, technical solution and advantages of the cold joint of the present invention clearer, the present invention will be further described in detail below in conjunction with specific drawings and specific embodiments.

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

1 and 2, the present invention provides a cold joint, including a first body part 100 and a second body part 200; the inside of the first body part 100 is provided with a cavity 101 with an open end, in the The bottom wall 102 of the first body part 100 opposite to the opening is provided with a strand part 103; The projection on the first main body part 100 (the orthographic projection of the direction shown in FIG. 1 in the horizontal direction) is located on the bottom wall 102 of the first main body part 100 on which the twisted wire part 103 is disposed. Wherein the first body part 100 and the second body part 200 are split, and the first body part 100 and the second body part 200 are detachably connected. In this embodiment, the first body part 100 and the second body part 200 are screwed together.

The cold joint of the present invention improves the existing cold joint. It divides the cold joint into two parts, and the two parts are connected by threads, that is to say, the two parts can be fixed and the lead wires can be fixed by the knob. Connect it well, so that the cold cutting pliers are not needed during operation, so that the wall thickness of the cold joint can be appropriately thickened, and the cold joint with a larger wall thickness can meet the requirements of safety regulations, and it does not need to be used in conjunction with casing or egg shells. At the same time, cold joints with larger wall thickness are not easy to be pinched.

The twisted wire part 103 in the first main body part 100 is used for twisting with the wiring. During use, the copper leakage wire of the wiring is inserted from the through hole 210 of the second main body part 200 until the copper leakage wire of the wiring Contact the twisted wire part 103; then the first main body part 100 and the second main body part 200 are screwed tightly, and at the same time the leak copper wire of the wiring is engaged with the twisted wire part 103 to complete the wiring. The current cold joint uses the deformation of the internal copper sheet to bite the copper wire in the wiring, but it is easy for the copper wire to leak out in this way. The cold joint of the present invention changes the previous wiring method of inserting and clamping , the combination of wiring and copper wires and twisted wires will become tighter with the more rotations, the wiring and twisted wires are 360 degrees around the crimped wires, completely avoiding the problem of exposed copper wires.

From the analysis of the cost of use, the cold joint of the present invention does not need to use cold cutting pliers, so only one employee can complete the installation of the cold joint alone, saving labor costs and equipment costs; The copper leakage wires of the root wiring are twisted together and only need to pass through the through hole, thus simplifying the operation process and improving the assembly speed. According to statistics, the assembly speed of cold joints has increased by 4 times.

Preferably, as a possible implementation, referring to Fig. 1, the twisted wire part 103 is a plurality of twisted teeth, one end of the twisted teeth is fixed on the bottom wall 102, and the other end of the twisted teeth is a free end ; The shape of the twisted tooth is a sickle shape, a crescent shape, a double crescent shape, a spring shape or a double helix shape. In order to achieve the best effect on the occlusion of the twisted teeth and wiring, the shapes of the twisted teeth can be varied, and different shapes of twisted teeth can be designed according to the actual situation. Referring to Fig. 1, several twisted teeth can be arranged in parallel or non-parallel, preferably the free ends of all twisted teeth intersect at one point.

The first body part 100 and the second body part 200 are connected by threads. As a possible implementation mode, referring to FIG. 1 , the first body part 100 includes a receiving part 110 and a connecting part 120, the cavity 101 is set in the receiving part 110, and the connecting part 120 is set in the The opening end of the cavity 101, the inner diameter of the connecting part 120 is adapted to the outer diameter of the second main body part 200; An external thread 201 matched with the internal thread 121 is provided on the top, and the first main body part 100 and the second main body part 200 are connected through the internal thread 121 and the external thread 201 . In this embodiment, the second main body part 200 is connected inside the connecting part through threads.

As another embodiment, the second main body part 200 includes a clamping part and a connecting part connected to each other, and the inner diameter of the connecting part is adapted to the outer diameter of the first main body part 100; The connecting part is provided with an internal thread, and the first main body is provided with an external thread matched with the internal thread, and the first main body and the second main body pass through the internal thread and the External thread connection. In this embodiment, after the first body part 100 and the second body part 200 are screwed together, a part of the first body part 100 is located in the second body part.

Preferably, as a better embodiment, a vacant thread that can prevent the first body part 100 and the second body part 200 from back-rotating is provided at the bottom of the thread. The vacant thread can screw the first main body and the second main body together tightly when screwed to the bottom of the thread, and then it is invalid when unscrewed in the opposite direction. This setting can effectively prevent the product from shaking. The possibility that the threaded structure can be unscrewed under the action of the force in the opposite direction further increases the reliability of the installation. In this embodiment, vacant threads are provided at the bottoms of both the internal thread and the external thread, and vacant threads may be provided only on the internal thread or only on the external thread.

Preferably, as a possible implementation manner, referring to FIG. 1 , a protruding portion 130 is provided on the inner side wall of the first main body portion 100; a protruding portion 220 is provided on the second main body portion 200; When the first body part 100 and the second body part 200 are screwed together, the protruding part 130 presses the protruding part 220 . During the screwing process of the first main body part 100 and the second main body part 200, the protruding part 130 can press the protruding part 220, so that the wiring located in the protruding part 220 can be pressed, and the twisted wiring The wire and the twisted wire portion will not tear or fall off under the pulling of the external force.

The protruding portion 130 may be in the shape of a ring, or several claws. Similarly, the protruding portion 220 may also be in the shape of a ring, and may be several claws. Preferably, both the protruding part 130 and the protruding part 220 are ring-shaped, so that the protruding part can completely press the protruding part.

More preferably, the surface 131 of the protruding portion 130 in contact with the protruding portion 220 is an inclined surface; the inclined surface 131 of the protruding portion 130 is inclined in a direction away from the strand portion 103 . Setting the slope can better compress the protruding part 220 . Referring to Fig. 1, the angle between two opposite slopes is less than 90 degrees.

Further, the surface 221 of the protruding portion 220 in contact with the protruding portion 130 is a slope, and the slope 221 of the protruding portion 220 is inclined towards the direction approaching the second main body portion 200 . The angle between the two opposite slopes 221 is less than 90 degrees.

Preferably, the inner diameter of the through hole of the extension part 220 decreases gradually along the direction approaching the first main body part 100 . This setting can clamp the wiring very well and prevent the wiring from falling off.

The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be determined by the claims.

Claims (11)

1. A cold joint, characterized in that it comprises a first body part (100) and a second body part (200) detachably connected; A cavity (101) with an open end is provided inside the first main body part (100), and a twisted wire part is provided on the bottom wall (102) of the first main body part (100) opposite to the opening (103); The second body part (200) is provided with a through hole (210), and the projection of the through hole (210) on the first body part (100) along the axial direction of the through hole (210) It is located on the bottom wall (102) of the first main body part (100) on which the twisted wire part (103) is arranged. 2. The cold joint according to claim 1, characterized in that, the twisted wire part (103) is a plurality of twisted teeth, and one end of the twisted teeth is fixed on the bottom wall (102); The shape of the teeth is sickle, crescent, double crescent, spring or double helix. 3. The cold joint according to claim 1, characterized in that, the first main body part (100) and the second main body part (200) are screwed together. 4. The cold joint according to claim 3, characterized in that, the first body part (100) comprises a receiving part (110) and a connecting part (120), and the cavity (101) is arranged in the receiving part In the part (110), the connecting part (120) is arranged at the opening end of the cavity (101), and the inner diameter of the connecting part (120) is compatible with the outer diameter of the second main body part (200). match; An internal thread (121) is provided on the connecting portion (120), an external thread (201) matching the internal thread is provided on the second main body portion (200), and the first main body portion (100) and the second body part (200) are connected by the internal thread (121) and the external thread (201). 5. The cold joint according to claim 3, characterized in that, the second body part (200) comprises a clamping part and a connection part connected to each other, and the inner diameter of the connection part is the same as that of the first body part (100) to match the outer diameter; The connecting part is provided with an internal thread, and the first main part is provided with an external thread matched with the internal thread, the first main part (100) and the second main part (200 ) is connected through the internal thread and the external thread. 6. The cold joint according to claim 4 or 5, characterized in that, the bottom of the internal thread and/or external thread is provided with a device to avoid the first main body part (100) and the second main body part ( 200) Back-rotated vacant thread. 7. The cold joint according to claim 1, characterized in that, a protruding part (130) is provided on the inner side wall of the first main body part (100); A protruding part (220) is provided on the second main body part (200); when the first main body part (100) and the second main body part (200) are screwed together, the protruding part ( 130) Compressing said protrusion (220). 8. The cold joint according to claim 7, characterized in that, both the protruding portion (130) and the protruding portion (220) are ring-shaped. 9. The cold joint according to claim 7, characterized in that, the surface (131) of the protruding part (130) in contact with the protruding part (220) is an inclined plane; the protruding part ( 130) is inclined in a direction away from the strand portion (103). 10. The cold joint according to claim 7, characterized in that, the surface (221) of the protruding part (220) in contact with the protruding part (130) is an inclined plane, and the protruding part ( 220) the inclined surface is inclined towards the direction approaching the second main body part (200). 11. The cold joint according to claim 7, characterized in that, the inner diameter of the through hole of the extension part (220) decreases gradually along the direction approaching the first main body part (100).