Wiring device suitable for industrial small and micro motors

Abstract

The utility model relates to the technical field of motor wiring, in particular to a wiring device suitable for a miniature motor in industrial application. The motor wiring device comprises a motor wiring box, a wiring frame is fixedly installed in the motor wiring box, at least three binding posts are fixedly installed on the wiring frame, compression nuts are fixedly installed on the binding posts, and plug-in type wiring terminals corresponding to the binding posts are fixedly installed on the lower portion of the wiring frame. The plug-in type wiring device is reasonable and compact in structure and convenient to use, achieves the purpose of plug-in type wiring through the cooperative use of the motor wiring box, the wiring rack, the wiring post and the plug-in type wiring terminal, has the characteristics of safety, reliability and convenience in wiring, facilitates operation, improves the working efficiency, saves the installation cost, and is suitable for popularization and application. The wiring operation of the motor can be well met, space limitation is avoided, the operation difficulty is reduced, and the wiring device is particularly suitable for wiring installation of small, medium and micro motors.

Description

Technical Field

[0001] This utility model relates to the field of electric motor wiring technology, and is a wiring device suitable for small and micro electric motors in industrial applications. Background Technology

[0002] In industrial enterprises, small and micro motors below 2.2kW are widely used in the transmission of various main or auxiliary equipment, such as small centrifugal pumps, metering pumps, dosing pumps, lubricating oil pumps, and ventilation fans. Due to the complex environment of industrial production sites, including corrosive gases, corrosive dust, high temperatures, high humidity, vibrations during equipment operation, and vibrations or resonances caused by other equipment, higher requirements are placed on the reliability and convenience of motor wiring. Furthermore, some areas are difficult to wire due to limited space. Moreover, because substations in some medium and large industrial enterprises are relatively concentrated, the power supply distance for electrical equipment is often greater than 100 meters, or even longer. Therefore, the cross-sectional area of ​​the power supply cable for small and micro motors of 2.2kW and below that require separate power supply and control in production sites is generally no less than ZA-YJV22 0.6 / 1kV 4×2.5mm². 2 However, small and micro motors with power ratings of 2.2kW and below often use traditional terminal blocks and bolt-fitted wiring methods. The windings inside the motor junction box are led out with thin, soft copper wires. Currently, the commonly used wiring methods for these small and micro motors have many problems:

[0003] 1. Traditional wiring methods are complex and inconvenient to install: In industrial production sites, the wiring of small and micro motors using bolt fastening is difficult to operate, requiring professional tools and skilled technicians. In some cases, personnel may even need to complete the wiring operation in a confined space, resulting in the inability to connect the wires or a long time consumption.

[0004] 2. Poor connection reliability: Vibration, temperature changes and possible chemical corrosion in the industrial environment can easily cause the connection parts of the traditional bolt crimp wiring method to loosen and oxidize, reduce conductivity, and even cause abnormal intermittent operation or phase loss operation of the motor.

[0005] 3. Insufficient safety: The special nature of industrial environments requires motor wiring to have better insulation and protection performance. After long-term use, traditional wiring methods are prone to loosening of crimping bolts and loosening of wires due to field vibrations, leading to grounding faults, phase-to-phase short circuits, and other accidents, threatening personnel safety and production stability.

[0006] 4. For power supply distances greater than 100 meters, ZA-YJV22 0.6 / 1kV 4×2.5mm is required. 2For electric motors powered by cable lines, the connection method of bolt crimping with terminals of φ6 or less is used for small and micro motors with power ratings of 2.2kW and below. The internal cable often uses single-core hard wire, while the motor winding lead wire uses multi-core soft wire. When connecting internal and external wires, the crimping connection of soft and hard wires is very easy to cause poor connection.

[0007] Therefore, there is a need for a reliable wiring structure suitable for industrial applications, especially for small and micro motors of 2.2kW and below in industrial enterprises, to achieve fast and convenient wiring operations, while improving the reliability and safety of the wiring, and to be easy to maintain and meet the usage requirements in complex industrial environments. Summary of the Invention

[0008] This utility model provides a wiring device for small and micro motors suitable for industrial applications, which overcomes the shortcomings of the prior art. It can effectively solve the problems of complex and inconvenient installation, poor connection reliability, insufficient safety, and easy occurrence of loose connections in existing wiring methods.

[0009] The technical solution of this utility model is achieved through the following measures: a wiring device for small and micro electric motors suitable for industrial applications, including a motor junction box, a wiring frame fixedly installed inside the motor junction box, at least three terminals fixedly installed on the wiring frame, a clamping nut fixedly installed on the terminals, and plug-in terminals corresponding to the terminals fixedly installed at the lower part of the wiring frame.

[0010] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0011] The motor junction box has a lower mounting hole at the bottom, and the motor power input cable gland is fixedly installed in the lower mounting hole of the motor junction box.

[0012] The aforementioned grounding terminal is fixedly installed inside the motor junction box.

[0013] The aforementioned plug-in terminal block is a spring-loaded terminal block.

[0014] The above-mentioned plug-in terminals are fitted with corresponding insulating sleeves on the upper outer side and corresponding insulating sleeves on the lower outer side; or / and, the motor terminal box is a square terminal box with the opening facing upward, and a pressure cover is fixedly installed on the top of the motor terminal box, and an upper mounting hole is provided on the pressure cover.

[0015] The aforementioned cover is fixedly installed on the motor junction box by bolts and nuts.

[0016] This utility model has a reasonable and compact structure and is easy to use. By using the motor junction box, junction box, terminal block and plug-in terminal block together, it achieves the purpose of plug-in wiring. It is safe, reliable and easy to wire, which facilitates operation, improves work efficiency and saves installation costs. It can well meet the wiring work of motors and is not limited by space, which reduces the difficulty of operation. It is especially suitable for wiring and installation of small and micro motors. Attached Figure Description

[0017] Appendix Figure 1 This is a front perspective view of the structure of this utility model after wiring.

[0018] Appendix Figure 2 This is a magnified front view of the upper part of the elastic snap ring type terminal block in this utility model.

[0019] Appendix Figure 3 This is a magnified schematic diagram of the insulating sleeve corresponding to the upper part of the elastic snap-fit ​​terminal block in this utility model.

[0020] Appendix Figure 4 This is a magnified front view of the lower half of the elastic snap ring type terminal block in this utility model.

[0021] Appendix Figure 5 This is a magnified schematic diagram of the insulating sleeve corresponding to the lower half of the elastic snap-fit ​​terminal block in this utility model.

[0022] Appendix Figure 6 This is a magnified front view of the assembled upper and lower halves of the elastic snap-lock terminal block of this utility model, with an insulating sheath fitted on them.

[0023] The codes in the attached diagram are as follows: 1 is the motor junction box, 2 is the terminal block, 3 is the terminal post, 4 is the clamping nut, 5 is the plug-in terminal, 6 is the motor power input gland, 7 is the grounding terminal, 8 is the spring, 9 is the insert, 10 is the motor power line, 11 is the winding lead, 12 is the insulating sleeve, 13 is the unlocking pressure plate, 14 is the spring terminal, 15 is the insert terminal, 16 is the self-locking hole, 17 is the positioning lock hole, and 18 is the crimping spring. Detailed Implementation

[0024] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0025] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0026] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0027] As attached Figure 1 As shown, the wiring device for small and micro electric motors suitable for industrial applications includes a motor junction box 1, a terminal frame 2 fixedly installed inside the motor junction box 1, at least three terminals 3 fixedly installed on the terminal frame 2, a clamping nut 4 fixedly installed on the terminal 3, and a plug-in terminal 5 corresponding to the terminal 3 fixedly installed at the lower part of the terminal frame 2.

[0028] The wiring devices for small and micro motors suitable for industrial applications can be further optimized and / or improved according to actual needs:

[0029] As attached Figure 1 As shown, a lower mounting hole is provided at the bottom of the motor junction box 1, and a motor power inlet gland 6 is fixedly installed in the lower mounting hole of the motor junction box 1. The motor power inlet gland 6 is a known and commonly used type, which facilitates the connection of the power cable.

[0030] As attached Figure 1 As shown, a grounding terminal 7 is fixedly installed inside the motor junction box 1.

[0031] As attached Figure 1 , 2 As shown in Figures 4 and 6, the plug-in terminal 5 is a spring-loaded terminal. Spring-loaded terminals can be existing, publicly known types. The motor junction box 1 contains three spring-loaded terminals, which can be fixed to the terminal frame 2 inside the motor junction box 1. Each spring-loaded terminal includes a spring 8 (female) and a tab 9 (male), with spring 8 and tab 9 corresponding one-to-one. Both are made of highly conductive copper alloy and undergo special surface treatment, exhibiting strong oxidation and corrosion resistance. The surfaces of spring 8 and tab 9 are plated with a corrosion-resistant nickel-plated metal layer to improve their corrosion resistance in chemical environments.

[0032] When wiring, the cable connector (motor power cable 10) can be passed through the motor power inlet gland 6. The cable connector assembly includes a plug that connects to the cable, and the metal pins on the plug are inserted into the socket of the motor terminal assembly. The pins use this plug-in wiring structure mainly because the winding lead 11 inside the motor terminal box 1 is connected to the external power cable through a spring-loaded terminal block.

[0033] As attached Figure 1 , 6As shown, a corresponding insulating sleeve 12 is fitted on the upper outer side of the plug-in terminal 5, and a corresponding insulating sleeve 12 is fitted on the lower outer side of the plug-in terminal 5; or / and, the motor junction box 1 is a square junction box with an upward opening, and a pressure cover is fixedly installed on the top of the motor junction box, with an upper mounting hole provided on the pressure cover. The elastic snap-fit ​​terminal may include a snap spring 8 and a insert 9, with an insulating sleeve 12 installed on the snap spring 8 side and an insulating sleeve 12 installed on the insert 9 side. The insulating sleeves 12 on the snap spring 8 side and the insulating sleeves 12 on the insert 9 side are made of corrosion-resistant and high-temperature resistant polycarbonate, which can effectively prevent the intrusion of external chemicals and moisture.

[0034] As needed, the gland is fixedly installed on the motor junction box 1 with bolts and nuts. This makes it easy to remove the gland for wiring or maintenance.

[0035] Features of this utility model:

[0036] 1. The internal power supply side wiring of the motor junction box 1 adopts a plug-in wiring structure. The wiring can be completed simply by aligning and inserting the plug. This is different from the traditional bolt crimping structure, which can achieve quick and convenient wiring of small and micro motors.

[0037] 2. The power cord and motor winding lead 1 are connected through a spring-loaded terminal block structure. After the insert 9 and the spring 8 are connected, the elastic clamping structure inside the spring 8 can provide stable contact pressure, making it more secure. The spring 8 is equipped with an elastic spring-loaded metal spring, and the self-locking mechanism between the insert 9 and the spring 8 realizes the positioning and locking after connection, which can avoid the loosening caused by vibration in industrial applications due to traditional bolt connection structure.

[0038] 3. Compared with the traditional exposed wiring, the wiring of this utility model uses an insulating sleeve 12 for insulation and protection; which effectively improves the insulation and protection performance of the wiring structure.

[0039] 4. Compared with the traditional direct wiring of rigid cables, this utility model adopts a flexible snap-lock terminal block structure. The terminal block is designed for power supply lines of 2.5mm² and below for small and micro motor power supply cables, which is convenient for wiring and more secure.

[0040] 5. Compared with the traditional bolt crimping and disassembly operations that require the use of special tools, this utility model can achieve the disassembly of internal and external wiring by directly pressing the unlocking plate 13 on the spring 8.

[0041] This utility model has the following advantages over the prior art:

[0042] 1. The plug-in wiring structure provides quick and convenient wiring for small and micro motors in industrial applications, improving work efficiency and saving installation costs.

[0043] 2. The terminal block uses a spring clip structure. After the insert 9 is connected to the spring clip 8, the elastic clamping structure inside the spring clip 8 can provide stable contact pressure, making the connection between the insert 9 and the spring clip 8 more secure. In addition, the spring clip 8 is equipped with an elastic spring clip metal spring, and the self-locking mechanism between the insert 9 and the spring clip 8 realizes the positioning and locking after connection, making the wiring more secure and avoiding the loosening caused by vibration in industrial applications caused by traditional bolt wiring structures.

[0044] 3. Using an insulating sleeve 12 at the wiring point provides better insulation and protection.

[0045] 4. The wiring adopts a flexible snap-lock terminal block structure. The terminal block is designed for power supply lines of 2.5mm² and below for small and micro motor power cables, which facilitates wiring.

[0046] 5. The internal and external wiring can be easily disassembled by unlocking the pressure plate 13, which meets the requirements for disassembly and use of the equipment and is not limited by space, thus reducing the difficulty of operation.

[0047] 6. The elastic snap ring type wiring structure uses elastic mechanical structure to meet the terminal wiring requirements. Compared with the traditional cast bolt crimp type, it uses significantly less non-ferrous metal, and the required material cost is greatly reduced, which can reduce the manufacturing cost of motor.

[0048] The wiring method of this utility model is as follows:

[0049] 1. Slide the motor winding leads 1 (U1, V1, W1) onto the insulating sleeves 12 respectively, and then use terminal pliers to crimp the motor winding leads 1 onto the spring terminals 14 to connect the motor winding leads 1.

[0050] 2. Insert the yellow, green, and red wires of the power cable (motor power cable 10) into the insulating sheath 12 respectively, and then use terminal pliers to crimp the yellow, green, and red wires to the plug terminal 15 to connect the cable.

[0051] 3. Align one end of the yellow (green, red) strip with the self-locking hole 16 of the insert 9 with one end of the spring 8 U1 (V1, W1) with the crimping snap ring 18, ensuring that the position of the insert 9 and the spring 8 are accurately horizontally aligned. Then, forcefully insert the insert 9 into the spring 8. At this time, the self-locking latch mechanism inside the spring 8 tightly locks the insert 9 through the positioning lock hole 17 and the elastic clamping structure, achieving a reliable electrical connection.

[0052] 4. After the insertion is completed, check whether the connection between the insert 9 and the spring 8 is tight, whether the elastic locking structure inside the spring 8 can provide stable contact pressure to the insert 9, and whether the elastic snap-spring metal spring and the self-locking mechanism have been positioned and locked to ensure that it is secure.

[0053] 5. Place the insulating sleeves 12 on the spring 8 side and the insert 9 side onto the spring 8 and insert 9 respectively, and seal them to ensure good insulation and sealing;

[0054] 6. Strip the yellow-green wire of the cable and connect it to the grounding terminal 7 (grounding point side) inside the motor junction box 1, and secure it firmly with bolts.

[0055] 7. When the equipment needs to be disassembled or repaired urgently, the spring 8 and the insert 9 can be quickly separated by pressing the unlocking plate 13 on the spring 8 directly, so as to facilitate the disassembly of the internal and external wiring of the motor junction box 1.

[0056] The above technical features constitute the preferred embodiment of this utility model, which has strong adaptability and the best implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A wiring device suitable for small and micro electric motors in industrial applications, characterized in that... It includes a motor junction box, a terminal frame is fixedly installed inside the motor junction box, at least three terminals are fixedly installed on the terminal frame, a clamping nut is fixedly installed on the terminal, and a plug-in terminal corresponding to the terminal is fixedly installed at the lower part of the terminal frame.

2. The wiring device for small and micro electric motors suitable for industrial applications according to claim 1, characterized in that... The bottom of the motor junction box is provided with a lower mounting hole, and the motor power input cable is fixedly installed in the lower mounting hole of the motor junction box.

3. The wiring device for small and micro electric motors suitable for industrial applications according to claim 1 or 2, characterized in that... A grounding terminal is fixedly installed inside the motor junction box.

4. The wiring device for small and micro electric motors suitable for industrial applications according to claim 1 or 2, characterized in that... The plug-in terminal block is a spring-loaded terminal block.

5. The wiring device for small and micro electric motors suitable for industrial applications according to claim 3, characterized in that... The plug-in terminal block is a spring-loaded terminal block.

6. The wiring device for small and micro electric motors suitable for industrial applications according to claim 1, 2, 3, or 5, characterized in that... The upper outer side of the plug-in terminal block is fitted with a corresponding insulating sleeve, and the lower outer side of the plug-in terminal block is fitted with a corresponding insulating sleeve; or / and, the motor terminal box is a square terminal box with the opening facing upward, and a pressure cover is fixedly installed on the top of the motor terminal box, and an upper mounting hole is provided on the pressure cover.

7. The wiring device for small and micro electric motors suitable for industrial applications according to claim 4, characterized in that... The upper outer side of the plug-in terminal block is fitted with a corresponding insulating sleeve, and the lower outer side of the plug-in terminal block is fitted with a corresponding insulating sleeve; or / and, the motor terminal box is a square terminal box with the opening facing upward, and a pressure cover is fixedly installed on the top of the motor terminal box, and an upper mounting hole is provided on the pressure cover.

8. The wiring device for small and micro electric motors suitable for industrial applications according to claim 6, characterized in that... The gland is fixedly installed on the motor junction box by bolts and nuts.

9. The wiring device for small and micro electric motors suitable for industrial applications according to claim 7, characterized in that... The gland is fixedly installed on the motor junction box by bolts and nuts.

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