Cast-iron junction box with high protection

Abstract

The present invention relates to a cast-iron junction box with high protection. The cast-iron junction box with high protection comprises a junction box seat, a junction box cover and a rubber gasket.The rubber gasket is arranged between the junction box seat and the junction box cover, the junction box cover is provided with a female end, the rubber gasket is provided with a layer of seam allowance binding, and the inner wall of the seam allowance binding of the rubber gasket is tightly connected with the outer wall of the upper port of the junction box seat. When the cast-iron junction boxis installed, the junction box seat is coated with the rubber gasket to form good fixing without generation of deflection; and the inner diameter of the seam allowance of the junction box cover is larger than the external diameter of the junction box seat and the thickness of the rubber gasket. The wrapping design eliminates extra polishing labor time generated by rough casting tolerance and improves the production efficiency. A motor by employing the cast-iron junction box with high protection is good in protection, high in safety factor, convenient to install and high in production efficiency.

Description

technical field [0001] The invention relates to a cast iron motor, in particular to a cast iron motor junction box. Background technique [0002] At present, the junction box casting process of cast iron materials in the motor industry generally adopts metal mold casting and investment casting. The tolerances of the blanks produced by the two casting methods are shown in Table 1. It can be seen that the tolerance of the cast iron blanks is quite large. At the same time, the junction box adopts a square design for the convenience of wiring, and it cannot be fitted with a stop. Therefore, the junction boxes of cast iron motors are all designed with non-spigot fit. There is only a plane between the junction box cover and the junction box seat, and a flat rubber pad is provided between the two planes of the cover and the seat to seal it. [0003] Table 1: [0004] [0005] Such as Figure 7 , Figure 8 As shown, the matching surface between the existing cast iron motor jun...

AI Technical Summary

Problems solved by technology

[0006] (1) During the installation process, the rubber pad 12 is made of soft material and has no good positioning, so it is easy to deflect, and it is easy to cause the junction box to be leaky and affect the appearance

[0007] (2) Due to the casting tolerance of the cast iron junction box blank, there will be two cases where the junction box cover 11 is larger than the junction box seat 13 or the junction box cover 11 is smaller than the junction box seat 13, which affects the appearance and needs to be polished later, affecting production efficiency

[0008] (3) The outer side of the rubber pad 12 is bare, and it is easy to age when the working environment is poor, which affects the protection of the junction box

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