Three-phase wire holder

Abstract

The utility model discloses a three-phase wire holder, which relates to the technical field of electrical connection, and comprises an insulating main body, and three copper bars are inserted into the insulating main body in a penetrating manner; the lower side of the insulating body is sleeved with a shielding cover, and the upper and lower ends of the insulating body are respectively provided with a built-in sealing ring and a lantern ring sealing ring. The insulating main body is provided with a connecting flange part, a connecting head part positioned at the upper end of the connecting flange part and a connecting bottom part positioned at the lower end of the connecting flange part; the built-in sealing ring is embedded in the upper side of the connecting flange part, the lantern ring sealing ring is arranged on the peripheral side wall of the connecting bottom in a sleeving mode, and the shielding cover is connected to the connecting flange part and the connecting bottom in a sleeving mode. The lower side of the shielding cover is located on the upper side of the lantern ring sealing ring. According to the utility model, the overall structure of the three-phase wire holder is optimized, so that the problem of warping shrinkage is solved while the purpose of reducing the glue structure design is achieved, and the stability and air tightness of the overall structure are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical connection, and more specifically to a three-phase line connection seat. Background Art

[0002] The three-phase asynchronous motor is a type of induction motor, which is powered by three-phase AC current. Since the rotor and stator rotating magnetic field of the three-phase asynchronous motor rotate in the same direction and at different speeds, there is a slip rate, so it is called a three-phase asynchronous motor. The speed of the rotor of the three-phase asynchronous motor is lower than the speed of the rotating magnetic field. The rotor winding generates electromotive force and current due to the relative motion between the rotor winding and the magnetic field, and interacts with the magnetic field to generate electromagnetic torque to achieve energy conversion.

[0003] As an important component connecting the motor stator and the electronic control system of new energy electric vehicles, the three-phase line terminal block needs to have the ability to effectively shield interference, stabilize current and have strong insulation resistance.

[0004] However, the existing three-phase line terminal blocks still have the problem that the insulation resistance is difficult to be effectively improved and the overall structural stability and air tightness are insufficient, which need to be improved. Summary of the invention

[0005] In view of this, the purpose of this application is to provide a three-phase line terminal block to optimize the composition structure and improve the overall structural stability and air tightness. The specific scheme is as follows:

[0006] A three-phase line terminal block comprises an insulating body, wherein three copper bars are inserted through the insulating body; a shielding cover is sleeved on the lower side of the insulating body, and a built-in sealing ring and a collar sealing ring are respectively provided at the upper and lower ends; the insulating body is provided with a connecting flange portion and a connecting head portion respectively located at the upper end of the connecting flange portion and a connecting bottom portion located at the lower end of the connecting flange portion; the built-in sealing ring is embedded in the upper side of the connecting flange portion, the collar sealing ring is sleeved on the outer peripheral side wall of the connecting bottom portion, and the shielding cover is sleeved on the connecting flange portion and the connecting bottom portion; wherein the lower side of the shielding cover is located on the upper side of the collar sealing ring.

[0007] Preferably, the connecting flange portion is provided with a plurality of connecting through holes located at the corners, and a sealing ring groove matching the built-in sealing ring is provided in the middle portion.

[0008] Preferably: the shielding cover comprises an upper sleeve portion matching the connecting flange portion and a lower sleeve portion matching the connecting bottom portion, the upper sleeve portion is provided with a plurality of matching holes respectively matching the corresponding connecting through holes; bushings are inserted in the matching holes and the corresponding connecting through holes.

[0009] Preferably, the insulating body is provided with three matching sockets respectively matching with the corresponding copper bars and a tube through-hole located between two adjacent matching sockets.

[0010] Preferably: the connection bottom is provided with an engaging ring groove, the engaging ring groove matches the collar seal, and the collar seal is provided with a plurality of equally spaced engaging portions along the length direction for embedding into the connection bottom.

[0011] Preferably: the copper busbar comprises a flat joint, a straight knurled portion and an annular groove portion distributed from top to bottom; the flat joint is provided with a threaded steel sleeve and passes through the upper end of the connecting head, and the straight knurled portion and the annular groove portion are located on the inner side of the insulating body.

[0012] It can be seen from the above scheme that the present application provides a three-phase wire connection socket, which has the following beneficial effects:

[0013] 1. By optimizing the overall structure of the three-phase line terminal block, the purpose of reducing the glue structure design is achieved while solving the warping and shrinkage problems, thereby improving the overall structural stability and air tightness;

[0014] 2. When the DC voltage is controlled at 1000V, the insulation resistance between the two adjacent terminals of the test piece is greater than 5000MΩ; and when the AC voltage is controlled at 3000V, no breakdown or arcing is found, and the leakage current does not exceed 5mA;

[0015] 3. The copper bar composed of the straight knurled part and the annular groove part is located in the insulating body, which will significantly improve the torsional strength and pull-out strength of the copper bar and avoid the problem of insufficient airtightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of this embodiment;

[0017] Figure 2 It is a schematic diagram of the explosion structure of this embodiment.

[0018] Explanation of the reference numerals: 1. Insulating body; 11. Connecting flange; 111. Sealing ring groove; 112. Connecting through hole; 12. Connecting head; 13. Connecting bottom; 131. Fitting ring groove; 14. Matching jack; 15. Through hole; 2. Copper busbar; 21. Flat joint; 22. Straight knurled portion; 23. Ring groove portion; 3. Shielding cover; 31. Upper sleeve portion; 311. Matching hole; 32. Lower sleeve portion; 4. Sleeve seal; 41. Fitting portion; 5. Built-in seal; 6. Bushing. DETAILED DESCRIPTION

[0019] In order to make the technical solution and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0020] like Figure 1 As shown, a three-phase line terminal block includes an insulating body 1. The insulating body 1 is formed by injection molding, and three copper bars 2 are inserted through it. The copper bars 2 are metal copper conductive columns obtained by insert machining and cutting to form a stable electrical connection structure. A shielding cover 3 is sleeved on the lower side of the insulating body 1, and a built-in sealing ring 5 and a sleeve sealing ring 4 are respectively provided at the upper and lower ends. The built-in sealing ring 5 and the sleeve sealing ring 4 are molded to improve the matching stability with the insulating body 1.

[0021] like Figure 1 , Figure 2 As shown, the insulating body 1 includes a connecting flange portion 11 and a connecting head 12 located at the upper end of the connecting flange portion 11 and a connecting bottom 13 located at the lower end of the connecting flange portion 11. The built-in sealing ring 5 is embedded in the upper side of the connecting flange portion 11, and the sleeve sealing ring 4 is sleeved on the outer peripheral side wall of the connecting bottom 13, so that the three-phase line terminal block forms a stable sealing structure with the connecting accessories during use, thereby achieving the purpose of improving air tightness. Among them, the shielding cover 3 is sleeved on the connecting flange portion 11 and the connecting bottom 13, and the lower side of the shielding cover 3 is located on the upper side of the sleeve sealing ring 4. Therefore, the shielding cover 3 will play an effective shielding effect, so that the three-phase line terminal block has the effect of shielding interference and current stability.

[0022] It should be mentioned that a plurality of connection through-holes 112 are provided at the corners of the connection flange 11, and a sealing ring groove 111 matching the built-in sealing ring 5 is provided in the middle. The shielding cover 3 includes an upper sleeve 31 matching the connection flange 11 and a lower sleeve 32 matching the connection bottom 13. The upper sleeve 31 is provided with a plurality of matching holes 311 respectively matching the corresponding connection through-holes 112, and a bushing 6 is inserted in the matching holes 311 and the corresponding connection through-holes 112. The bushing 6 plays a role in protecting the connection flange 11 and the shielding cover 3, and prevents the three-phase line terminal block from being hard-damaged due to the contact of the fasteners during use, thereby effectively extending the service life of the three-phase line terminal block.

[0023] like Figure 2As shown, the insulating body 1 is provided with three matching sockets 14 respectively matched with the corresponding copper busbars 2 and a pipe perforation located between two adjacent matching sockets 14. The pipe perforation plays the role of saving materials, ventilation and heat dissipation, and lightweight, so as to improve the economic value and practicality of the three-phase line terminal block. An engaging ring groove 131 is provided on the connection bottom 13. The engaging ring groove 131 matches the sleeve ring seal 4, and the sleeve ring seal 4 is provided with a plurality of equally spaced engaging portions 41 along the length direction and used to be embedded in the connection bottom 13. Therefore, it will play a role in improving the connection stability between the sleeve ring seal 4 and the insulating body 1.

[0024] It should be noted that the copper bar 2 includes a flat joint 21, a straight knurled portion 22 and an annular groove portion 23 distributed from top to bottom. The flat joint 21 is provided with a threaded steel sleeve and passes through the upper end of the connecting head 12, and the straight knurled portion 22 and the annular groove portion 23 are located inside the insulating body 1, so that the copper bar 2 composed of the straight knurled portion 22 and the annular groove portion 23 is located inside the insulating body 1, which will significantly improve the torsional strength and pull-out strength of the copper bar 2 and avoid the problem of insufficient airtightness.

[0025] In summary, the present application provides a three-phase wire terminal block, which optimizes the overall structure of the three-phase wire terminal block, thereby achieving the purpose of reducing the glue structure design and solving the warping and shrinkage problems, thereby improving the overall structural stability and air tightness. At the same time, by controlling the DC voltage to 1000V, the insulation resistance value between the two adjacent terminals of the test piece is greater than 5000MΩ; and by controlling the AC voltage to 3000V, no breakdown or arcing phenomenon is found, and the leakage current does not exceed 5mA.

[0026] The "first", "second", "third", "fourth", etc. (if any) referred to in this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods or devices.

[0027] It should be noted that the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0028] Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A three-phase line terminal block, characterized in that: The invention comprises an insulating body (1), wherein three copper bars (2) are inserted through the insulating body (1); a shielding cover (3) is sleeved on the lower side of the insulating body (1), and a built-in sealing ring (5) and a sleeve sealing ring (4) are respectively arranged at the upper and lower ends; the insulating body (1) is provided with a connecting flange part (11) and a connecting head part (12) respectively located at the upper end of the connecting flange part (11) and a connecting bottom part (13) located at the lower end of the connecting flange part (11); the built-in sealing ring (5) is embedded in the upper side of the connecting flange part (11), the sleeve sealing ring (4) is sleeved on the outer peripheral side wall of the connecting bottom part (13), and the shielding cover (3) is sleeved on the connecting flange part (11) and the connecting bottom part (13); wherein the lower side of the shielding cover (3) is located on the upper side of the sleeve sealing ring (4).

2. A three-phase line terminal block according to claim 1, characterized in that: The connecting flange portion (11) is provided with a plurality of connecting through holes (112) located at the corners, and a sealing ring groove (111) matching the built-in sealing ring (5) is provided in the middle portion.

3. A three-phase line terminal block according to claim 2, characterized in that: The shielding cover (3) comprises an upper sleeve portion (31) matching the connecting flange portion (11) and a lower sleeve portion (32) matching the connecting bottom portion (13); the upper sleeve portion (31) is provided with a plurality of matching holes (311) respectively matching the corresponding connecting through holes (112); bushings (6) are inserted into the matching holes (311) and the corresponding connecting through holes (112).

4. A three-phase line terminal block according to claim 1, characterized in that: The insulating body (1) is provided with three matching sockets (14) respectively matching with the corresponding copper busbars (2) and a tube through hole located between two adjacent matching sockets (14).

5. The three-phase line terminal block according to claim 1, characterized in that: The connecting bottom (13) is provided with an engaging annular groove (131), the engaging annular groove (131) matches the collar seal (4), and the collar seal (4) is provided with a plurality of engaging portions (41) distributed at equal intervals along the length direction and used for being embedded in the connecting bottom (13).

6. A three-phase line terminal block according to claim 1, characterized in that: The copper busbar (2) comprises a flat joint (21), a straight knurled portion (22) and an annular groove portion (23) which are arranged from top to bottom; the flat joint (21) is provided with a threaded steel sleeve and passes through the upper end of the connecting head (12), and the straight knurled portion (22) and the annular groove portion (23) are located on the inner side of the insulating body (1).

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