Pre-insulated bolt type terminal

Abstract

The utility model discloses a pre-insulation bolt type terminal, comprising a wiring terminal, the wiring terminal is connected with a compression bolt used for compressing a cable, the connection part of the wiring terminal and the cable is provided with a protection assembly, the protection assembly comprises a housing and a protection cover, and the housing is provided with a through hole. One end of the shell wraps the wiring terminal, the shell is provided with a window matched with a through hole connected with a compression bolt on the wiring terminal, and the protective cover is detachably arranged on the window; according to the utility model, the structure is simple, the design is reasonable, the protection assembly is arranged, the wiring terminals are insulated through the housing, short circuit between the adjacent wiring terminals is prevented, the window corresponding to the compression bolt is arranged at the top of the housing, and the protection cover is installed, so that air is prevented from entering the housing to oxidize the cable core and the wiring terminals, thereby causing poor contact.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical machinery technical field, concretely is a kind of pre-insulated bolt type terminal. BACKGROUND

[0002] The terminal is a kind of element for realizing electrical connection, in circuit, it can reliably fix and connect together wire or cable, ensure that current is smoothly transmitted, play the role of bridge.

[0003] In the related art, such as the bolt type terminal disclosed in patent No. CN201247827Y, including body, bolt and nut, bolt hole is formed on the body, bolt is screwed in the bolt hole. In use, the end of the cable is stripped of the skin, and then the core of the cable is inserted into the cavity on the body, and then the bolt is tightened to fix the core on the body, and finally the bolt is locked by the nut to prevent loosening during use.

[0004] In actual use, it is found that the above-mentioned terminal has disadvantages. If the cable for wiring is an aluminum core, the core of the cable will be exposed to the air for a long time, which will cause the surface of the core to be oxidized to form aluminum oxide. The solid aluminum oxide does not conduct electricity, which will cause poor contact between the cable and the terminal. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a pre-insulated bolt type terminal to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a pre-insulated bolt type terminal, including terminal, the terminal is connected with compression bolt for compressing cable, the terminal is provided with protection assembly at the connection place of the terminal and the cable, the protection assembly includes:

[0007] The shell is wrapped around the terminal at one end, and a window matching the through hole of the compression bolt connected to the terminal is formed on the shell;

[0008] The protective cover is detachably arranged in the window.

[0009] Preferably, the end of the shell away from the terminal is provided with a gland.

[0010] Preferably, the gland includes a nut fixed to the shell, a compression claw at the end of the shell away from the terminal, and a sealing ring inside the compression claw.

[0011] Preferably, the end of the terminal and the shell close to the equipment connection is provided with a sealing ring by opening a groove, and the sealing ring is used to seal the gap between the terminal and the shell.

[0012] Preferably, the shell material is selected from insulating materials.

[0013] Preferably, the terminal is internally provided with teeth or threads for contacting the cable.

[0014] Compared with the prior art, the utility model has the advantages of:

[0015] 1. The pre-insulated bolt type terminal is provided with a protection assembly, which comprises a shell and a protection cover, and the shell is used for insulating the terminal to prevent short circuit between adjacent terminals, and the shell top is provided with a window corresponding to the compression bolt and is provided with the protection cover to prevent air from entering the shell to oxidize the cable core and the terminal and cause poor contact.

[0016] 2. The pre-insulated bolt type terminal is used to connect the cable core to the terminal and the shell from the end of the shell away from the terminal, and the nut tightens the compression claw inward to compress the sealing ring in the shell to the cable core, thereby improving the stability of the connection between the terminal and the cable core.

[0017] 3. The pre-insulated bolt type terminal is provided with teeth or threads at the connection between the terminal and the cable, the teeth can increase the friction between the cable core and the inner wall of the terminal when the compression bolt is used to fix the cable core, thereby improving the stability of the cable connection, and if there is an oxidation layer on the surface of the cable core, the teeth can also damage the oxidation layer to improve the conductivity between the cable and the terminal body. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Fig. 2 It is an exploded view of the overall structure of the utility model;

[0020] Fig. 3 It is a cross-sectional view of the overall structure of the utility model;

[0021] In the drawing: 110, terminal; 111, teeth; 120, compression bolt; 121, fracture groove; 130, shell; 140, window; 150, protection cover; 160, gland; 161, nut; 162, compression claw; 163, sealing ring; 164, thread groove; 170, sealing ring. DETAILED DESCRIPTION

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integrated connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0026] Example

[0027] Please see Figs. 1-3 As shown, the present invention provides a pre-insulated bolt-type terminal technical solution: including a terminal block 110, a clamping bolt 120 for clamping the cable connected to the terminal block 110, and an installation cavity for accommodating the cable inside the connection end of the terminal block 110. The bottom of the installation cavity is an arc shape or V-shape adapted to the cable. In other embodiments, the installation cavity can also be opened on the side of the terminal block 110 near the clamping bolt, that is, the connection end of the terminal block 110 and the cable is an arc structure with an arc angle greater than 60°.

[0028] A protective component is installed at the connection point between the terminal block 110 and the cable. The protective component includes a housing 130 and a protective cover 150. One end of the housing 130 is wrapped around the cable connection end of the terminal block 110. A groove is provided at the connection point between the housing 130 and the terminal block 110. The groove is located between the cable connection part and the equipment connection part of the terminal block 110. A sealing ring 170 is installed inside the groove to improve the sealing performance of the connection between the housing 130 and the terminal block 110. In other embodiments, the groove and sealing ring 170 can also be an elastic rubber concave ring and an elastic rubber convex ring structure. The elastic rubber concave ring and the rubber convex ring are glued and fixed to the housing 130 and the terminal block 110, respectively.

[0029] The housing 130 is made of insulating material. A window 140 is provided on the housing 130 to match the through hole of the clamping bolt 120 on the terminal block 110, facilitating the installation and tightening of the clamping bolt 120. A protective cover 150 is connected to the housing 130 corresponding to the window 140. Covering the housing 130 with the protective cover prevents air from entering. An anti-loss lanyard is integrally formed between the protective cover 150 and the housing 130 to prevent loss during installation. Furthermore, a protruding snap-fit ​​ring is integrally formed on the housing 130 along the circumference of the window 140, and a corresponding snap-fit ​​ring protrusion is formed on the protective cover 150. A snap-fit ​​groove is provided at the position. The protective cover 150 is connected to the housing 110 by snap-fit ​​ring protrusion and snap-fit ​​ring groove. By increasing the housing 130 to isolate the terminal 110 from the air, the oxidation of the terminal 110 and the cable connection part and the cable core is reduced, the stability of the connection between the terminal 110 and the cable core is improved, and the situation of poor contact is reduced. In addition, the protective cover 150 has a baffle integrally formed between the snap-fit ​​ring groove to isolate the two clamping bolts 120, so that the window 140 is sealed by the protective cover 150 to form two independent chambers to ensure a better sealing effect.

[0030] Furthermore, a gland 160 is provided at the end of the housing 130 away from the terminal 110. The gland 160 includes a nut 161 fixed to the housing 130, a clamping claw 162 at the end of the housing 130 away from the terminal 110, and a sealing ring 163 located inside the clamping claw 162. The sealing ring 163 is installed inside the end of the housing 130 away from the terminal 110. The clamping claw 162 is fixed by an integrally formed sealing tube at the end of the housing 130 away from the equipment mounting end. The sealing tube and the clamping claw 162 are also integrally formed. Multiple clamping claws 162 are evenly distributed along the circumference of the sealing tube, and the length direction of the clamping claws 162 is consistent with that of the sealing tube. The sealing ring 163 is a rubber ring, and the sealing ring 163 is inserted into the circle formed by multiple clamping claws 162. The sealing ring 163 is coaxially sleeved on the outside of the clamping claw 162 and the sealing tube, and the nut 161 is threadedly connected to the threaded groove 164 on the sealing tube. A bevel is integrally formed at the end of the nut 161 away from the housing 130. The bevel gradually shrinks inward in the direction away from the housing 130. When the nut 161 is tightened, the bevel will squeeze the clamping claw 32 inward, and connect the cable core from the end of the housing 130 away from the terminal 110 to the inside of the terminal 110 and the housing 130. After tightening the nut 161, the clamping claw 162 tightens inward to press the sealing ring 163 installed in the housing 130 against the cable core, thereby improving the stability of the connection between the terminal 110 and the cable core.

[0031] Furthermore, the clamping bolt 120 has a fracture groove 121. The cable core is connected from the end of the housing 130 away from the terminal 110 to the inside of the terminal 110 and the housing 130. Tightening the clamping bolt 120 fixes the cable core inside the terminal 110. When the clamping bolt 120 reaches the set torque, the head of the clamping bolt 120 will crack from the fracture groove 121. When the terminal 110 is connected to cable cores of different diameters, the head of the clamping bolt 120 will crack from different fracture grooves 121 to achieve the purpose of fixing the cable core.

[0032] Furthermore, the terminal block 110 has teeth 111 or threads inside. When the cable core is connected to the terminal block 110, the teeth 111 increase the friction between the terminal block 110 and the cable core, thereby improving the connection stability between the terminal block 110 and the cable core. If there is an oxide layer on the surface of the cable core, during the tightening of the clamping bolt 120, the teeth 111 increase the pressure applied by the terminal block 110 to the cable core and destroy the oxide layer to improve the conductivity between the terminal block 110 and the cable core.

[0033] The working principle of this utility model is as follows:

[0034] In this embodiment, a pre-insulated bolt-type terminal is used with a protective component installed at the connection between the terminal 110 and the cable. One end of the housing 130 is wrapped around the terminal 110. The housing 130 is installed on the terminal 110, and a sealing ring 170 is added at the connection between the housing 130 and the terminal 110 to improve the sealing performance of the connection. The cable core is inserted into the terminal 110 and the housing 130 from the end of the housing 130 away from the terminal 110. Then, the clamping bolt 120 is tightened to press and fix the cable core inside the terminal 110. The protective cover 150 is then covered to isolate air and prevent air from entering and oxidizing the cable core, causing poor contact. Finally, the nut 161 is tightened. The nut 161 will tighten the clamping claw 162 inward to press the sealing ring 163 installed inside the housing 130 onto the cable.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pre-insulated bolt-type terminal, comprising a wiring terminal (110), characterized in that: A clamping bolt (120) for clamping the cable is connected to the terminal block (110), and a protective component is provided at the connection between the terminal block (110) and the cable. The protective component includes: A housing (130) is provided, one end of which is wrapped around the terminal block (110), and a window (140) is provided on the housing (130) that matches the through hole on the terminal block (110) for connecting the clamping bolt (120); A protective cover (150) is detachably disposed on the window (140).

2. The pre-insulated bolt type terminal according to claim 1, characterized in that: A gland (160) is provided at the end of the housing (130) away from the terminal block (110).

3. A pre-insulated bolt-type terminal according to claim 2, characterized in that: The gland (160) includes a nut (161) fixed to the housing (130), a clamping claw (162) at the end of the housing (130) away from the terminal (110), and a sealing ring (163) located inside the clamping claw (162).

4. A pre-insulated bolt-type terminal according to claim 1, characterized in that: The terminal block (110) and the housing (130) near the device connection end are provided with a sealing ring (170) through a groove, and the sealing ring (170) is used to seal the gap between the terminal block (110) and the housing (130).

5. A pre-insulated bolt-type terminal according to claim 1, characterized in that: The shell (130) is made of insulating material.

6. A pre-insulated bolt-type terminal according to claim 1, characterized in that: The terminal block (110) is provided with teeth (111) or threads that come into contact with the cable.

Images