Auxiliary terminal box for electric machines

Abstract

This utility model discloses an auxiliary junction box for a motor, relating to the field of motor technology. Specifically, it comprises a junction box, a cover, and bolts. The four corners of the top of the junction box are connected to the four corner bolts of the cover via bolts. A terminal block is fixedly connected to the inner bottom wall of the junction box. A connector is fixedly connected to one side of the junction box. The connector has a first inlet hole at its center. A locking block is fixedly connected to the top of the connector. A connector cap is fitted onto the outer surface of the connector. A positioning post is fixedly connected to one side of the junction box. The outer surface of the positioning post has a through hole. An annular groove is provided inside the connector, and a sealing ring is provided inside the annular groove. This auxiliary junction box for a motor can secure the wire during use, thereby fixing the wire and preventing it from falling off the terminal block due to vibration.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to an auxiliary junction box for use on a motor. Background Technology

[0002] An electric motor is a device that converts electrical energy into mechanical energy. It utilizes a rotating magnetic field generated by a current-carrying coil (i.e., the stator winding) to act on the rotor (such as a squirrel-cage closed aluminum frame), forming a magnetoelectric torque. Electric motors are classified into DC motors and AC motors according to the power supply they use. Most motors in power systems are AC motors, which can be synchronous motors or asynchronous motors (where the speed of the stator magnetic field and the speed of the rotor are not synchronized). An electric motor mainly consists of a stator and a rotor. The direction of the force on a current-carrying conductor in a magnetic field is related to the direction of the current and the direction of the magnetic field lines. The working principle of an electric motor is that the magnetic field exerts a force on the current, causing the motor to rotate. There is a junction box on the surface of the motor. The motor junction box is the interface for connecting the internal and external power supplies of the motor and is also a component that protects the electrical components inside the junction box.

[0003] The existing motor junction boxes have some shortcomings. When the motor is working, it will vibrate to a certain extent. The vibration amplitude of the motor in the work vehicle used in the bumpy environment is even more serious. There is a risk that the wires will vibrate and detach from the terminal, causing the motor to fail. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an auxiliary junction box for motors, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an auxiliary junction box for a motor, comprising a junction box, a cover, and bolts. The four corners of the top of the junction box are connected to the four corner bolts of the cover via bolts. A terminal block is fixedly connected to the inner bottom wall of the junction box. A connector is fixedly connected to one side of the junction box. A first inlet hole is provided at the center of the connector. A clamping block is fixedly connected to the top of the connector. A connector cap is fitted onto the outer surface of the connector. A positioning post is fixedly connected to one side of the junction box. A through hole is provided on the outer surface of the positioning post. An annular groove is provided inside the connector. A sealing ring is provided inside the annular groove.

[0008] Optionally, a fixing member is fixedly connected to the bottom outer surface of the connecting cap, the fixing member has a positioning hole at the top, the connecting cap has a second wire inlet hole at both ends, and the connecting cap has a cavity inside, the cavity has a cylindrical bottom and a frustum shape at the top.

[0009] Optionally, the number of terminals is three, the number of connectors is three, the number of first inlet holes is three, and the number of clamping blocks is eighteen.

[0010] Optionally, the junction box has a first threaded hole at each of its four top corners, and the cover has a second threaded hole at each of its four corners.

[0011] Optionally, the number of positioning pins is four and they are distributed circumferentially around the connector. The number of through holes is several, and a pin is inserted into the inner surface of each through hole. The number of pins is four, and the pins are made of stainless steel.

[0012] Optionally, the sealing ring is made of rubber, the terminal block is made of brass, and the junction box and cover are made of engineering plastic.

[0013] This utility model provides an auxiliary junction box for motors, which has the following advantages:

[0014] 1. This auxiliary junction box for motors, through the design of connectors, connector caps, clamping blocks, and cavities, enables the auxiliary junction box for motors to clamp and fix the wires. Through the cooperation of the clamping blocks and cavities, the wires can be clamped during use, thereby fixing the wires and preventing them from falling off the terminals due to vibration. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure at point A of this utility model.

[0017] Figure 3 This is a schematic diagram of the connector of this utility model.

[0018] Figure 4 This is a structural schematic diagram of part B of the present invention.

[0019] Figure 5 This is a schematic diagram of the clamping block of this utility model.

[0020] Figure 6 This is a cross-sectional structural diagram of the connecting cap of this utility model.

[0021] Figure 7This is a schematic diagram of the connecting cap of this utility model.

[0022] Figure 8 This is a schematic diagram of the sealing ring of this utility model.

[0023] In the diagram: 1. Junction box; 2. Cover; 3. Terminal block; 4. Connector; 5. First inlet hole; 6. Clamping block; 7. Connecting cap; 8. Positioning pin; 9. Through hole; 10. Annular groove; 11. Sealing ring; 12. Second inlet hole; 13. Cavity; 14. Bolt; 15. First threaded hole; 16. Second threaded hole; 17. Pin; 18. Connector; 19. Positioning hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example

[0026] Please see Figures 1 to 8This utility model provides a technical solution: an auxiliary junction box for a motor, including a junction box 1, a cover 2, and bolts 14. The four corners of the top of the junction box 1 are connected to the four corners of the cover 2 by bolts 14. A terminal block 3 is fixedly connected to the inner bottom wall of the junction box 1. A connector 4 is fixedly connected to one side of the junction box 1. The center of the connector 4 has a first inlet hole 5. A clamping block 6 is fixedly connected to the top of the connector 4. A connector cap 7 is sleeved on the outer surface of the connector 4. The two ends of the connector cap 7 have second inlet holes 12. The interior of the connector cap 7 has a cavity 13. The bottom of the cavity 13 is cylindrical and the top is frustum-shaped. A positioning post 8 is fixedly connected to one side of the junction box 1. The outer surface of the positioning post 8 has through holes 9. There are four positioning posts 8, which are circumferentially distributed around the connector 4. There are several through holes 9. A pin 17 is inserted into the inner surface of the through holes 9 to prevent the connector cap 7 from loosening due to vibration. A fixing member 18 is fixedly connected to the bottom outer surface of the connector cap 7. The top of the fixing member 18 has a... Positioning holes 19 are used to fix the wires. When fixing the wires, the wires are passed through the second inlet hole 12 and the first inlet hole 5 in sequence. When fixing the wires, the four positioning holes 19 are aligned with the four positioning posts 8. The connecting cap 7 is pressed down along the wire towards the connector 4. The clamping block 6, which is fixedly connected to the top of the connector 4, shrinks towards the center under the pressure of the inner surface of the cavity 13, thereby clamping the wire. When clamped to the limit position, the pin 17 is inserted into the through hole 9 on the outer surface of the positioning post 8 to complete the fixation. The connector 4 has an annular groove 10 inside, and a sealing ring 11 is provided inside the annular groove 10. The sealing ring 11 is set to prevent dust from entering the interior of the junction box 1. This auxiliary junction box for motors, through the setting of connector 4, connecting cap 7, clamping block 6, and cavity 13, enables the auxiliary junction box for motors to have the effect of clamping and fixing the wires. Through the cooperation of clamping block 6 and cavity 13, the wires can be clamped during use, thereby fixing the wires and preventing the wires from falling off the terminal 3 due to vibration.

[0027] There are three terminal blocks 3, three connectors 4, three first inlet holes 5, eighteen clamping blocks 6, first threaded holes 15 at the four corners of the top of junction box 1, second threaded holes 16 at the four corners of the cover 2, four pins 17, and the pins 17 are made of stainless steel. The sealing ring 11 is made of rubber. Rubber has the advantages of good sealing performance, good elasticity and softness, wear resistance and aging resistance, and relatively low cost. The terminal blocks 3 are made of brass. The junction box 1 and the cover 2 are made of engineering plastic. Engineering plastic has excellent comprehensive performance, high rigidity, low creep, high mechanical strength, good heat resistance, and good electrical insulation. It can be used for a long time in harsh chemical and physical environments.

[0028] When using this auxiliary junction box for motors, first pass the wire through the second inlet hole 12 and the first inlet hole 5 in sequence. Connect one end of the wire to the terminal 3 inside the junction box 1. After the connection is completed, fix the wire. When fixing the wire, align the four positioning holes 19 with the four positioning posts 8. Press the connector cap 7 along the wire towards the connector head 4. The clamping block 6 fixedly connected to the top of the connector head 4 will shrink towards the center under the pressure of the inner surface of the cavity 13, thereby clamping the wire. When clamped to the limit position, insert the pin 17 into the through hole 9 on the outer surface of the positioning post 8. After inserting the pin 17, bend the pin 17 to prevent it from falling out of the through hole 9, thus completing the fixing.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An auxiliary junction box for an electric motor, comprising a junction box (1), a cover (2), and bolts (14), characterized in that: The top four corners of the junction box (1) are connected to the four corner bolts of the cover (2) by bolts (14). The inner bottom wall of the junction box (1) is fixedly connected to the terminal block (3). The side of the junction box (1) is fixedly connected to the connector (4). The center of the connector (4) is provided with a first inlet hole (5). The top of the connector (4) is fixedly connected to a clamping block (6). The outer surface of the connector (4) is fitted with a connector cap (7). The side of the junction box (1) is fixedly connected to a positioning post (8). The outer surface of the positioning post (8) is provided with a through hole (9). The inside of the connector (4) is provided with an annular groove (10). The inside of the annular groove (10) is provided with a sealing ring (11).

2. An auxiliary junction box for a motor according to claim 1, characterized in that: The bottom outer surface of the connecting cap (7) is fixedly connected to a fixing member (18), the top of the fixing member (18) is provided with a positioning hole (19), the two ends of the connecting cap (7) are provided with a second inlet hole (12), the inside of the connecting cap (7) is provided with a cavity (13), the bottom of the cavity (13) is cylindrical and the top is frustum-shaped.

3. An auxiliary junction box for a motor according to claim 1, characterized in that: The number of terminals (3) is three, the number of connectors (4) is three, the number of first inlet holes (5) is three, and the number of clamping blocks (6) is eighteen.

4. An auxiliary junction box for a motor according to claim 1, characterized in that: The junction box (1) has a first threaded hole (15) at the top four corners, and the cover (2) has a second threaded hole (16) at the four corners.

5. An auxiliary junction box for a motor according to claim 1, characterized in that: The number of positioning pins (8) is four and they are distributed around the connector (4) in a circle. The number of through holes (9) is several. A pin (17) is inserted into the inner surface of the through hole (9). The number of pins (17) is four. The pins (17) are made of stainless steel.

6. An auxiliary junction box for a motor according to claim 1, characterized in that: The sealing ring (11) is made of rubber, the terminal block (3) is made of brass, and the junction box (1) and cover (2) are made of engineering plastic.

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