Anti-condensation motor for electric sanitation vehicle

Abstract

The utility model discloses an anti -condensation motor for electric sanitation car, include: casing, wiring assembly, including integrative setting in the wiring box of casing top, the wiring hole that is opened with casing inside intercommunication has in wiring box bottom, fixed plug -in wiring pipe has in wiring hole, the both ends of wiring pipe all integrative setting have fixed ring, the utility model annular air bag is extruded by the movement ring of screw rod drive and realizes radial expansion and axial compression, can closely fit the surface of different diameter's wire harness, can adapt to the problem of many specifications wire harness, ensure that can form effective sealing under different working conditions, the sealing layer that annular air bag forms after deformation is closely fitted with wire harness, constructs the isolation barrier, and the moisture in the motor casing is blocked to enter the wiring box through the wiring hole, thereby not being influenced by the hot air in the motor, and the steam can not condense dew on the wiring seat, and the insulation performance and reliability of motor have been improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to an anti-condensation motor for electric sanitation vehicles. Background Technology

[0002] Electric sanitation vehicles use AC permanent magnet synchronous motors. When the motor is under load, the internal stator and rotor act as heat sources, which will rapidly increase the internal air temperature and generate a large amount of heat. As the internal and external temperatures of the motor change, condensation will occur inside the motor. If the junction box is connected to the inside of the motor, water will accumulate inside the junction box. When there is too much water, it may cause the insulation inside the junction box to fail, which will lead to the insulation failure of the motor and affect the safety performance of the motor. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by providing the following technical solution: Anti-condensation motors for electric sanitation vehicles include: case; The wiring assembly includes an integrally formed junction box disposed on the top of the housing. The bottom of the junction box has a wiring hole communicating with the inside of the housing. A wiring tube is fixedly inserted into the wiring hole. Both ends of the wiring tube are integrally formed with fixing rings. An annular airbag is fixedly disposed inside the wiring tube. A movable ring is slidably connected inside the wiring tube and located at the top of the annular airbag. Both sides of the top of the fixing ring are rotatably inserted with lead screws. The lower section of the lead screw is threadedly connected to the movable ring. The wire harness passes through the annular airbag, and the moving ring is driven downward by rotating the lead screw to compress the annular airbag and deform it, thereby abutting against the wire harness.

[0004] As an improvement to the above technical solution, a transmission rod is rotatably connected to the top of the fixed ring and located between the two sets of lead screws, and a transmission belt is connected to both sets of lead screws.

[0005] As an improvement to the above technical solution, a waterproof and breathable valve is installed on the side wall of the junction box.

[0006] As an improvement to the above technical solution, a waterproof metal connector is installed on the side wall of the junction box.

[0007] As an improvement to the above technical solution, the top of the junction box is detachably connected to a junction box cover by bolts, and a sealing ring is provided between the junction box cover and the junction box.

[0008] The beneficial effects of this utility model are: The annular airbag achieves radial expansion and axial compression through the extrusion of a moving ring driven by a screw, which can closely fit the surface of wire harnesses of different diameters, adapt to the problem of multi-specification wire harnesses, and ensure effective sealing under different working conditions; The sealing layer formed after the annular airbag deforms fits tightly with the wiring harness, creating an isolation barrier that prevents moisture inside the motor housing from entering the junction box through the wiring holes. This prevents the motor from being affected by the heat inside the motor, and prevents steam from condensing on the terminal block, thus improving the motor's insulation performance and reliability. Attached Figure Description

[0009] Figure 1 This is a front view of the overall structure of this utility model; Figure 2 This is a side view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the structure of the wiring conduit of this utility model; Figure 4 This is a top view of the wiring conduit of this utility model.

[0010] Reference numerals: 10, housing; 20, junction box; 21, waterproof and breathable valve; 22, metal waterproof connector; 23, junction box cover; 24, wiring conduit; 241, transmission belt; 242, annular airbag; 243, fixed ring; 244, moving ring; 245, lead screw. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0012] Anti-condensation motors for electric sanitation vehicles include: Casing 10; The wiring assembly includes an integrally formed junction box 20 disposed on the top of the housing 10. The junction box 20 has a wiring hole at the bottom that communicates with the interior of the housing 10. A wiring tube 24 is fixedly inserted into the wiring hole. Both ends of the wiring tube 24 are integrally formed with fixing rings 243. An annular airbag 242 is fixedly disposed inside the wiring tube 24. A movable ring 244 is slidably connected inside the wiring tube 24 and located on top of the annular airbag 242. Both sides of the top of the fixing ring 243 are rotatably inserted with lead screws 245. The lower section of the lead screw 245 is threadedly connected to the movable ring 244. The wire harness passes through the annular airbag 242. By rotating the lead screw 245, the moving ring 244 is driven to move downward to compress the annular airbag 242 and deform it, thereby abutting against the wire harness.

[0013] Specifically, the junction box 20 and the motor housing 10 are integrally molded, eliminating gaps at the connection between the junction box 20 and the housing 10. The motor wiring harness needs to pass through the annular air bladder 242 inside the wiring tube 24 beforehand. The fixing ring 243 at the bottom of the wiring tube 24 contacts the bottom of the annular air bladder. The lower section of the lead screw 245 is threadedly connected to the moving ring 244, and the upper section is rotatably inserted into the top fixing ring 243. In the initial state, the moving ring 244 is located at the top of the annular air bladder 242 and does not exert pressure on the annular air bladder 242. The annular air bladder 242 maintains its original annular shape. The anti-condensation effect essentially prevents moisture inside the housing 10 from entering the junction box 20, thus avoiding condensation inside the junction box 20. In a crucial step, the operator manually rotates the lead screw 245. Because the upper section of the lead screw 245 is restricted from vertical displacement by the top fixing ring 243, it can only rotate around its own axis. The lower section of the lead screw 245 is threadedly connected to the moving ring 244. Therefore, the rotation of the lead screw 245 is converted into linear motion of the moving ring 244 along the axis of the lead screw 245. During the downward movement of the moving ring 244, its bottom will directly contact the top of the annular airbag 242 and continuously apply downward compressive force. Under the action of compressive force, the annular airbag will undergo radial expansion and axial compression deformation, so that the annular airbag and the wire harness are tightly pressed together to form a sealing layer, which completely blocks the air and moisture inside the housing 10 from entering the junction box 20 through the wiring hole.

[0014] In one embodiment, a transmission rod is rotatably connected to the top of the fixed ring 243 and located between the two sets of lead screws 245. The transmission rod is connected to the two sets of lead screws 245 by a transmission belt 241. The operator only needs to rotate any set of lead screws 245, and the power will be transmitted to the transmission rod through the transmission belt 241. Then, the transmission rod drives the other set of lead screws 245 synchronously through the transmission belt 241 on the other side. The rotation direction, speed, and rotation angle of the two sets of lead screws 245 are completely consistent, ensuring that the moving ring 244 moves horizontally downward along the axis of the lead screw 245, applying a uniform downward squeezing force to the annular airbag 242, so that the annular airbag 242 fits with the wire harness and eliminates the risk of local sealing failure.

[0015] In one embodiment, a waterproof and breathable valve 21 is installed on the side wall of the junction box 20. When the motor is running, the electrical components inside the junction box 20 will heat up due to the power supply, causing the air inside the box to expand and the air pressure to rise. When the motor stops running, the temperature inside the junction box 20 drops, the air contracts, and the air pressure decreases, forming a negative pressure. With the addition of the breathable valve, when the air pressure inside the junction box 20 rises, the hot air can be discharged through the waterproof and breathable valve 21. When the air pressure decreases, the dry air outside can enter the junction box 20 after being filtered for moisture by the waterproof and breathable valve 21, thus achieving dynamic balance of air pressure.

[0016] In one embodiment, a metal waterproof connector 22 is installed on the side wall of the junction box 20 to provide a channel for external cables to enter the junction box 20, and to achieve waterproof, dustproof and mechanical protection of the cable entry point through a rigid sealing structure made of metal.

[0017] In one embodiment, a junction box cover 23 is detachably connected to the top of the junction box 20 by bolts. A sealing ring is provided between the junction box cover 23 and the junction box 20. The junction box cover 23 is detachably connected to the top of the junction box 20 by bolts, and a sealing ring is provided between the two. This structure is an important part of the overall sealing system of the junction box 20. Its core function is to achieve an openable seal on the top of the junction box 20, which not only meets the needs of internal wiring operation and maintenance, but also ensures the waterproof and dustproof performance of the top connection through the combination of the detachable structure and the sealing ring, forming a complete closed protection with the existing structure.

[0018] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. An anti-condensation motor for electric sanitation vehicles, characterized in that, include: Housing (10); Wiring assembly, including a junction box (20) integrally formed on the top of the housing (10), the bottom of the junction box (20) having a wiring hole communicating with the inside of the housing (10), a wiring tube (24) fixedly inserted into the wiring hole, both ends of the wiring tube (24) being integrally formed with a fixing ring (243), an annular airbag (242) fixedly disposed inside the wiring tube (24), a movable ring (244) slidably connected inside the wiring tube (24) and located on the top of the annular airbag (242), and a lead screw (245) rotatably inserted on both sides of the top of the fixing ring (243), the lower section of the lead screw (245) being threadedly connected to the movable ring (244); wherein, the wire harness passes through the annular airbag (242), and by rotating the lead screw (245) driving the movable ring (244) to move downward, so as to squeeze the annular airbag (242) to deform it, thereby abutting against the wire harness.

2. The anti-condensation motor for electric sanitation vehicles according to claim 1, characterized in that: A transmission rod is rotatably connected to the top of the fixed ring (243) and between the two sets of lead screws (245), and a transmission belt (241) is connected to both the transmission rod and the two sets of lead screws (245).

3. The anti-condensation motor for electric sanitation vehicles according to claim 2, characterized in that: A waterproof and breathable valve (21) is installed on the side wall of the junction box (20).

4. The anti-condensation motor for electric sanitation vehicles according to claim 1, characterized in that: The side wall of the junction box (20) is fitted with a metal waterproof connector (22).

5. The anti-condensation motor for electric sanitation vehicles according to claim 1, characterized in that: The top of the junction box (20) is detachably connected to a junction box cover (23) by bolts, and a sealing ring is provided between the junction box cover (23) and the junction box (20).

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