CN204189997U - Quick coupling - Google Patents

Abstract

The utility model discloses a quick-connect joint, which comprises a joint body and a locking sleeve matched with the joint body. One end of the joint body is a wiring board, and the other end is a wiring pipe; Axially arranged shrinkage groove, the outer wall of the wiring tube is provided with external threads and an external stepped structure; the inner wall of the locking sleeve is provided with internal threads that cooperate with the external threads and internal steps that are locked with the external stepped structure Structure: the inner wall at the mouth of the wiring tube is provided with a tapered contact surface that is in close contact with the cable inserted into the wiring tube after being squeezed by the locking sleeve. By setting a tapered contact surface on the inner wall of the mouth of the wiring tube, when the product is in use, tighten the locking sleeve, and the locking sleeve forces the wiring tube to shrink and make the tapered contact surface closely contact with the cable, The contact area between the connector body and the cable is effectively increased, the electrical performance of the connector is better, it can carry a large current, and it has a good use effect.

Description

quick connector

technical field

The utility model relates to a quick-connect joint, which belongs to the field of connecting electric cables and electric equipment.

Background technique

At present, among the terminal blocks on various electrical appliances in the electric power industry, a pipe joint is often used. Judging by the hand feel during pressing, the effective contact area of the tube body cannot be determined, the pressure at the jaws is relatively high, and the rest of the part is suspended, which will cause false kisses or virtual connections; or due to improper occlusion of the jaws, Al2O3 and copper oxide oxide films will be formed on the surface of the joint, and the joints are prone to cracks or breaks after oxidation. These oxide films have extremely poor electrical conductivity and stable chemical properties. They adhere to the surface of the conductor for a long time, which will increase the contact. Resistance, the greater the contact resistance, the higher the power loss. In the case of a slightly large current, it is easy to cause heat at the connection, and even cause the joint to fuse, which poses a great threat to the safe power supply and use.

In this regard, the patent document CN203423274U discloses an energy-saving quick lock joint, which includes a joint body, which includes a connecting plate provided with a through hole and a connecting pipe provided with a lumen connected to one end of the connecting plate. The tube wall of the wiring tube is provided with at least two shrinkage grooves arranged in the axial direction, and the outer wall of the wiring tube is provided with an external thread and an external stepped structure; The internal thread matingly connected with the external thread and the internal stepped structure cooperating and locking with the external stepped structure. When the quick lock connector is in use, the end of the cable is inserted into the lumen of the wire tube, and the wire tube is forced to shrink and the cable is compressed by tightening the locking sleeve, thereby completing the connection between the connector and the cable. The locking of this structure When the joint is installed, just use a common wrench to connect the joint body and the locking sleeve. It is not necessary to use hydraulic pliers for crimping. It is easy to install, and the product can be reused, energy-saving and environmentally friendly. Compared with the pipe joint, it has a better use effect. However, the joint in this patent document still has deficiencies: (1) the inner wall of the open end of the wiring tube is at right angles. In contact with the cable, the contact surface with the cable is small and the contact resistance is large. When a large current passes through, there is a safety hazard, and long-term use may even affect the normal power supply; (2) The joint body is processed by a bar. , flatten one end, and drill wiring holes on the other end surface, which leads to more processing procedures, and requires the purchase of multiple processing equipment, resulting in higher production costs.

Utility model content

In view of this, the purpose of the utility model is to provide a quick connector with a large contact surface with the cable and good electrical performance.

The technical scheme that realizes the utility model purpose is:

A quick-connect joint, comprising a joint body and a locking sleeve matched with the joint body, one end of the joint body is a wiring board, and the other end is a wiring tube; the tube wall of the wiring tube is provided with a The outer wall of the wiring tube is provided with an external thread and an external stepped structure; the inner wall of the locking sleeve is provided with an internal thread that cooperates with the external thread and is locked with the external stepped structure. The inner ladder structure; the inner wall at the nozzle of the junction pipe is provided with a tapered contact surface that is in close contact with the cable inserted into the junction pipe after being squeezed by the locking sleeve.

In the above technical solution, the joint body is formed by crimping one end of a round pipe.

In the above technical solution, screw holes are provided on the side wall of the wire pipe, and crimping screws are provided in the screw holes.

In the above technical solution, a drain hole is also provided on the pipe wall of the connection pipe.

The utility model has positive effects:

(1) In the quick-connect joint of the present utility model, a tapered contact surface is provided on the inner wall of the mouth of the wire pipe. When the product is in use, the locking sleeve is tightened, and the locking sleeve forces the wire pipe to shrink and The tapered contact surface is in close contact with the cable, which effectively increases the contact area between the connector body and the cable, and the electrical performance of the connector is better, and it can carry a large current, which has a good use effect.

(2) In the quick-connect joint of the present utility model, a round tube is used for processing and forming. During processing, one end of the round tube is flattened to form the terminal board, and the lumen at the other end of the round tube is used as a wiring hole, so no additional processing of the wiring hole is required. , reducing the processing steps, thereby reducing the processing equipment (perforating equipment), and reducing the production cost.

(3) In the quick-connect joint of the present utility model, screw holes are provided on the side wall of the wiring tube, and crimping screws are arranged in the screw holes; by adopting this structure, tightening the crimping screws will insert The cable in the wiring tube is pressed tightly on the inner wall of the lumen, thereby further increasing the contact surface between the connector body and the cable, and further reducing the contact resistance.

(4) In the quick-connect joint of the utility model, the rainwater entering the connection pipe can be discharged in time by providing a drain hole on the pipe wall of the connection pipe.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the joint body in the quick-connect joint of the present invention;

Fig. 2 is a schematic diagram of the structure of the locking sleeve in the quick joint of the present invention;

Fig. 3 is a structural schematic diagram of the quick-connect joint of the present invention.

The reference signs shown in the figure are: 1-joint body; 11-wiring board; 12-wiring pipe; 13-shrink groove; 14-external thread; 15-screw hole; 16-drain hole; 17-tapered contact 2-Locking sleeve; 21-Internal thread; 3-Crimping screw; 4-Cable.

Detailed ways

The specific structure of the quick-connect joint of the present utility model is described below in conjunction with the accompanying drawings of the description:

A quick-connect joint, as shown in Figure 1 and Figure 2, which includes a joint body 1 and a locking sleeve 2 matched with the joint body 1, one end of the joint body 1 is a terminal block 11, and the other end is a wiring tube 12. The wall of the wiring tube 12 is provided with a shrinkage groove 13 arranged in the axial direction, and the outer wall of the wiring tube 12 is provided with an external thread 14 and an external stepped structure; the inner wall of the locking sleeve 2 is provided with There is an internal thread 21 cooperating with the external thread 14 and an internal stepped structure cooperating with the external stepped structure; The tapered contact surface 17 is in close contact with the cable inserted into the junction tube 12 after action. When the product is in use, tighten the locking sleeve 2, and the locking sleeve 2 forces the wiring tube 12 to shrink and makes the tapered contact surface 17 closely contact with the cable. See Figure 3, which effectively increases the connection between the connector body 1 and the cable. 4 contact area, the electrical performance of the joint is better, it can carry a large current, and has a good use effect.

In this embodiment, the joint body 1 is formed by crimping one end of a round tube. The round tube is used for processing and forming. During processing, one end of the round tube is flattened to form the terminal board 11, and the lumen at the other end of the round tube is used as a wiring hole, so there is no need to process additional wiring holes, which reduces the processing steps and further reduces the processing equipment. (Punching equipment), reducing production costs.

In this embodiment, a screw hole 15 is provided on the side wall of the wiring tube 12 , and a crimping screw 3 is arranged in the screw hole 15 . By adopting this structure, tightening the crimping screw 3 will press the cable 4 inserted into the wiring tube 12 on the inner wall of the lumen, thereby further increasing the contact surface between the connector body 1 and the cable 4, and further reducing the contact resistance. .

Further, the pipe wall of the connection pipe 12 is also provided with a drain hole 16 , so that the rainwater entering the connection pipe 12 can be discharged from the drain hole 16 in time.

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And these obvious changes or changes derived from the essential spirit of the present utility model still belong to the protection scope of the present utility model.

Claims (4)

1. A quick-connect joint, comprising a joint body (1) and a locking sleeve (2) matched with the joint body (1), one end of the joint body (1) is a terminal block (11), and the other end is a Connecting pipe (12); the wall of the connecting pipe (12) is provided with shrinkage grooves (13) arranged in the axial direction, and the outer wall of the connecting pipe (12) is provided with external threads (14) and external steps structure; the inner wall of the locking sleeve (2) is provided with an internal thread (21) cooperating with the external thread (14) and an internal stepped structure cooperating with the external stepped structure; it is characterized in that: The inner wall at the mouth of the junction pipe (12) is provided with a tapered contact surface (17) which closely contacts the cable inserted into the junction pipe (12) after being squeezed by the locking sleeve (2). 2. The quick-connect joint according to claim 1, characterized in that: the joint body (1) is formed by crimping one end of a round tube. 3. The quick-connect joint according to claim 2, characterized in that: screw holes (15) are provided on the side wall of the wiring tube (12), and crimping screws (15) are provided in the screw holes (15) 3). 4. The quick-connect joint according to claim 3, characterized in that: a drain hole (16) is also provided on the pipe wall of the connection pipe (12).