An electrical machine terminal box

Abstract

The utility model belongs to the technical field of electromechanical equipment, concretely relates to a motor junction box, including junction box still include arc reinforcing block, terminal and threading hole, be equipped with arc reinforcing block on the inner wall of junction box, be equipped with threading hole on the lateral wall of junction box, be equipped with terminal on arc reinforcing block, terminal is installed with pressing plate through screw, the inside of pressing plate is equipped with conducting strip, the bottom surface of conducting strip is equipped with protruding through the bottom surface of pressing plate, through setting arc reinforcing block on the inner wall of junction box, the overall strength of junction box is guaranteed, prevents cable from falling out and causes damage to terminal and motor winding outlet, through setting terminal on arc reinforcing block, the terminal that dispersion sets on each arc reinforcing block makes each terminal even stress, and the terminal that dispersion sets reduces the force that each terminal receives in the device working process.

Description

Technical Field

[0001] This utility model belongs to the field of electromechanical equipment technology, and specifically relates to a motor junction box. Background Technology

[0002] In the hoisting system of a garbage crane, the motor junction box is a key component connecting the motor and the cable. Its design and performance directly affect the safety and stability of the entire system. When the cable slips due to an accident, it comes out of the motor junction box, and the terminals in the junction box can easily be pulled off by the cable. It may even pull out the motor winding wires along with the cable, causing serious malfunctions. In addition, the internal space of the motor junction box is limited, and the terminals are concentrated, which leads to concentrated stress on the terminals and makes them prone to damage. Utility Model Content

[0003] This utility model provides a motor junction box to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A motor junction box includes a junction box with a cover mounted on its top by screws, an arc-shaped reinforcing block, a terminal block, and a wire hole. The arc-shaped reinforcing block is provided on the inner wall of the junction box, and the wire hole is provided on the side wall of the junction box. The terminal block is provided on the arc-shaped reinforcing block, and a pressure plate is mounted on the terminal block by screws. A conductive sheet is provided inside the pressure plate, and a protrusion penetrating the bottom surface of the pressure plate is provided on the bottom surface of the conductive sheet.

[0006] Preferably, the top edge of the arc-shaped reinforcing block is sloping, and the edge of the sloping top surface of the arc-shaped reinforcing block is arc-shaped.

[0007] Preferably, the inner wall of the wire hole is provided with a rubber layer, and the end face of the rubber layer facing the outside of the junction box is inclined.

[0008] Preferably, the rubber layer and the terminal block are different colors, while the terminal block and the rubber layer are the same color on the same side.

[0009] Preferably, the bottom end of the threading hole is located on the same horizontal plane as the top surface of the arc-shaped reinforcing block.

[0010] Preferably, the bottom surface of the pressure plate is provided with a partition plate, and the terminal block is provided with a groove that cooperates with the partition plate of the pressure plate.

[0011] Preferably, a baffle is hinged to the top surface groove of the cover via a torsion spring shaft, and a limit frame is installed on the side wall of the top surface groove of the junction box via a spring, with a protrusion on the side wall of the limit frame that cooperates with the baffle.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention ensures the overall strength of the junction box by setting arc-shaped reinforcing blocks on the inner wall of the junction box, preventing damage to the terminals and motor winding leads when the cable comes loose. By setting terminals on the arc-shaped reinforcing blocks, and providing wire-passing holes corresponding to the terminals on the side walls of the arc-shaped reinforcing blocks, the terminals are evenly stressed when distributed on each arc-shaped reinforcing block. The distributed terminals reduce the force on each terminal during device operation, ensuring the reliability of wiring. The terminals and rubber layer are different colors, making it easier for users to set corresponding cables on the same terminal, improving the efficiency of cable setting. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure after the cap is removed in this utility model;

[0016] Figure 3 for Figure 2 Schematic diagram of the structure at point A;

[0017] Figure 4 This is a schematic diagram of the structure of the terminal block mounting location in this utility model;

[0018] Figure 5 This is a schematic diagram of the pressure plate in this utility model viewed from below;

[0019] Figure 6 This is a schematic diagram of the top surface groove of the cover in this utility model.

[0020] In the diagram: 1. Junction box; 11. Cover; 12. Baffle; 13. Limiting frame; 2. Arc-shaped reinforcing block; 3. Wiring terminal; 31. Conductive sheet; 32. Pressure plate; 4. Wire hole; 41. Rubber layer. Detailed Implementation

[0021] Please see Figures 1-6 The present invention provides the following technical solution:

[0022] A motor junction box includes a junction box 1, a cover 11 mounted on the top of the junction box 1 by screws, an arc-shaped reinforcing block 2, a terminal block 3 and a wire hole 4. The arc-shaped reinforcing block 2 is provided on the inner wall of the junction box 1, and the wire hole 4 is provided on the side wall of the junction box 1. The terminal block 3 is provided on the arc-shaped reinforcing block 2, and a pressure plate 32 is mounted on the terminal block 3 by screws. The pressure plate 32 has a conductive sheet 31 inside, and a protrusion penetrating the bottom surface of the pressure plate 32 is provided on the bottom surface of the conductive sheet 31.

[0023] Junction box 1 is used to house the other components of the device. Cover 11 is used to seal the top opening of junction box 1. A square groove is provided on the top surface of junction box 1, and a protrusion is provided on the bottom surface of cover 11 that mates with the groove on the top surface of junction box 1. The mating of the groove and the protrusion serves as a limiting mechanism, ensuring the stability of cover 11 during installation by the user onto junction box 1. A sealing gasket is provided on the side wall of the groove on the top surface of junction box 1. This sealing gasket seals the gap between the groove and the protrusion on the bottom surface of cover 11, ensuring proper fit between cover 11 and junction box 1. The junction box 1 features a sealed top opening and a bottom opening for the user to insert the motor cable. A wire hole 4 allows the user to insert cables from external devices connected to the motor. Terminal blocks 3 connect the motor and external device cables. The top surface of terminal blocks 3 has threaded holes for screw engagement. A pressure plate 32 is mounted on the terminal blocks 3 via the engagement of screws and threaded holes. The screws are rotatably mounted on the pressure plate 32. This screw installation method ensures that the screws will not disengage from the pressure plate 32 during user adjustments, preventing accidental screw damage during disassembly. The pressure plate 32 falls during the process of being lowered, making it easier for the user to install the pressure plate 32 onto the terminal block 3. The bottom protrusion of the conductive plate 31 is located outside the screw on the terminal block 3. When the user installs the cable onto the terminal block 3, the wire core is wound around the screw, and the screw is rotated. The screw, under the action of the thread, moves the pressure plate 32 toward the terminal block 3. As the pressure plate 32 moves, it presses the cable wound on the screw onto the terminal block 3. At this time, the bottom protrusion of the conductive plate 31 contacts the wire core, and the two cables are connected through the conductive plate 31. The arc-shaped reinforcing block 2 is used to strengthen the overall strength of the junction box 1. If the cable accidentally detaches from the junction box 1... At the same time, the arc-shaped reinforcing block 2 can prevent damage to the terminal block 3 and the motor winding output when the cable comes loose, thus extending the service life of the junction box 1. The inner wall of the junction box 1 is provided with arc-shaped reinforcing blocks 2, which ensures the reinforcing effect of the arc-shaped reinforcing blocks 2 on the overall strength of the junction box 1. The material of the arc-shaped reinforcing block 2 is glass fiber, which ensures the working effect of the arc-shaped reinforcing block 2. The terminal block 3 is set on the arc-shaped reinforcing block 2. The position of the arc-shaped reinforcing block 2 makes the terminal block 3 distributed inside the junction box 1. The distributed terminal block 3 makes each terminal block 3 evenly stressed while reducing the force on each individual terminal block 3, thus improving the reliability of the wiring.

[0024] Specifically, the top edge of the arc-shaped reinforcing block 2 is sloping, and the edge of the sloping top surface of the arc-shaped reinforcing block 2 is arc-shaped.

[0025] After the cable on the motor is fixed to the terminal block 3, the cable on the motor contacts the edge of the arc-shaped reinforcing block 2. The sloping edge of the top surface of the arc-shaped reinforcing block 2 ensures that the cable on the motor will fit against the sloping part of the top surface of the arc-shaped reinforcing block 2 after it is fixed to the terminal block 3, reducing the damage to the cable after it is fixed to the terminal block 3. The arc-shaped edge of the sloping part of the top surface of the arc-shaped reinforcing block 2 further reduces the damage to the cable after it is fixed to the terminal block 3.

[0026] Specifically, a rubber layer 41 is provided on the inner wall of the wire hole 4, and the end face of the rubber layer 41 facing the outside of the junction box 1 is shaped as an inclined surface.

[0027] The rubber layer 41 serves to fix the cable passing through the wire hole 4, ensuring the stability of the cable after it is installed on the device. The rubber layer 41 also seals the gap between the cable and the wire hole 4, ensuring the overall sealing of the device. The beveled end face of the rubber layer 41 serves as a guide, making it easier for the user to pass the cable through the wire hole 4.

[0028] Specifically, the rubber layer 41 and the terminal 3 are different colors, while the terminal 3 and the rubber layer 41 on the same side are the same color.

[0029] The colors of the rubber layer 41 and the terminal block 3 serve as markings. The type of cable fixed on the terminal block 3 can be identified by the colors of the rubber layer 41 and the terminal block 3, which can prevent the device and motor from being damaged or the device from malfunctioning due to incorrect cable wiring during the user's cable setup process.

[0030] Specifically, the bottom of the thread hole 4 is located on the same horizontal plane as the top surface of the arc-shaped reinforcing block 2.

[0031] The position of the bottom end of the wire hole 4 ensures that the bottom end of the rubber layer 41 is higher than the top surface of the terminal block 3. The position of the wire hole 4 ensures that after the terminal block 3 fixes the cable, the distance between the cable passing through the wire hole 4 and the top surface of the arc-shaped reinforcing block 2 will not be too large. This avoids the cable from contacting the edge of the wire hole 4 due to the cable tilting too much when it is fixed, thus reducing the wear on the cable during the operation of the device.

[0032] Specifically, a partition plate is provided on the bottom surface of the pressure plate 32, and a groove is provided on the terminal block 3 to cooperate with the partition plate of the pressure plate 32.

[0033] The bottom partition plate of the pressure plate 32 will separate the wire cores set on the two screws, so as to prevent the wire cores of the two cables from getting tangled together when the user fixes the cable to the terminal 3. This ensures that the user will not be obstructed by another cable set on the same terminal 3 when disassembling the cable, making it easier for the user to disassemble the cable.

[0034] Specifically, a baffle 12 is hinged to the top groove of the cover 11 via a torsion spring shaft, and a limit frame 13 is installed on the side wall of the top groove of the junction box 1 via a spring. The side wall of the limit frame 13 is provided with a protrusion that cooperates with the baffle 12.

[0035] The groove of the limiting frame 13 on the top surface of the junction box 1 provides a force application position for the user to pull the cover 11. The baffle 12 seals the top surface groove of the junction box 1, preventing external debris from entering the top surface groove of the junction box 1 and hindering the user from removing the cover 11. The side wall protrusion of the limiting frame 13 prevents the baffle 12 from rotating. During the rotation of the baffle 12, the baffle 12 contacts the side wall protrusion of the limiting frame 13. At this time, the side wall groove of the limiting frame 13 is not exposed to the outside, ensuring the working effect of the baffle 12. The hinge axis of the baffle 12 is a torsion spring shaft, which ensures that the baffle 12 is not subjected to external forces. When the limit frame 11 is in the top groove of the closed junction box 1, the limit frame 13 is slidably mounted on the top groove of the junction box 1 by a spring. When the baffle 12 contacts the side wall protrusion of the limit frame 13, a part of the limit frame 13 is located outside the baffle 12. When the limit frame 13 is pushed, the side wall protrusion of the limit frame 13 disengages from the baffle 12. At this time, the baffle 12 can continue to rotate, and the side wall groove of the limit frame 13 is exposed to the outside. At this time, the user can remove the cover 11 from the junction box 1 through the limit frame 13. The spring provided on the limit frame 13 ensures that the limit frame 13 is in the state of restricting the baffle 12 when it is not subjected to external force, thus ensuring the working effect of the limit frame 13.

[0036] The working principle and usage process of this utility model are as follows: Release the fixation of the cover 11, push the baffle 12, and the baffle 12 contacts the side wall protrusion of the limiting frame 13. A part of the limiting frame 13 is exposed to the outside. Push the limiting frame 13, and the fixation of the limiting frame 13 to the baffle 12 is released. The user removes the cover 11 from the junction box 1 through the limiting frame 13. The motor cable is fed into the junction box 1 through the bottom through slot of the junction box 1. The cable is fed into the interior of the junction box 1 through the wire hole 4. The core of the matching cable is wound around the screw set on the same terminal 3. The pressure plate 32 is installed on the terminal 3 through the screw. The pressure plate 32 presses down the core. At this time, the conductive sheet 31 contacts the core. The two cables are connected through the conductive sheet 31. The cover 11 is installed back in its original position.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A motor junction box, comprising a junction box (1), wherein a cover (11) is screwed onto the top of the junction box (1), characterized in that: It also includes an arc-shaped reinforcing block (2), a terminal block (3) and a wire hole (4). The arc-shaped reinforcing block (2) is provided on the inner wall of the junction box (1), and the wire hole (4) is provided on the side wall of the junction box (1). The terminal block (3) is provided on the arc-shaped reinforcing block (2). A pressure plate (32) is installed on the terminal block (3) by screws. A conductive sheet (31) is provided inside the pressure plate (32). A protrusion penetrating the bottom surface of the pressure plate (32) is provided on the bottom surface of the conductive sheet (31).

2. The motor junction box according to claim 1, characterized in that: The top edge of the arc-shaped reinforcing block (2) is sloping, and the top edge of the arc-shaped reinforcing block (2) is arc-shaped.

3. A motor junction box according to claim 1, characterized in that: The inner wall of the wire hole (4) is provided with a rubber layer (41), and the end face of the rubber layer (41) facing the outside of the junction box (1) is sloping.

4. A motor junction box according to claim 3, characterized in that: The rubber layer (41) and the terminal (3) are different colors, while the terminal (3) and the rubber layer (41) on the same side are the same color.

5. A motor junction box according to claim 1, characterized in that: The bottom end of the thread hole (4) is located on the same horizontal plane as the top surface of the arc-shaped reinforcing block (2).

6. A motor junction box according to claim 1, characterized in that: The bottom surface of the pressure plate (32) is provided with a partition plate, and the terminal block (3) is provided with a groove that cooperates with the partition plate of the pressure plate (32).

7. A motor junction box according to claim 1, characterized in that: A baffle (12) is hinged to the top groove of the cover (11) by a torsion spring shaft. A limit frame (13) is installed on the side wall of the top groove of the junction box (1) by a spring. The side wall of the limit frame (13) is provided with a protrusion that cooperates with the baffle (12).

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