Single-gear aluminum shell boat-shaped resistor

Abstract

The invention relates to a single-gear aluminum shell boat-shaped resistor. The resistor comprises an aluminum alloy shell (1), a lead (2), a resistance wire (3), a mica sheet (4) and a mounting bracket (5), wherein the mounting bracket (5) is arranged above the mica sheet (4); the resistor also comprises a porcelain rack (6), wherein the porcelain rack (6) is arranged in the aluminum alloy shell (1); the lead (2) and the resistance wire (3) are riveted and arranged in the porcelain rack (6); and the mica sheet (4) covers the porcelain rack (6) and is fixed in the aluminum alloy shell (1). Compared with the prior art, the resistor has the advantages of good shock resistance, uniform heat dissipation, long service life, high efficiency and the like.

Description

technical field [0001] The invention relates to a resistor, in particular to a boat-shaped resistor with a single shift aluminum shell. Background technique [0002] At present, the same type of automotive air-conditioning condenser cooling fan resistors that are widely used generally use single-position aluminum shell resistors. Specifically, the alloy resistance wire of a certain specification is wound into a spring shape and put into a boat-shaped alloy aluminum shell, and insulating mica sheets are added to the aluminum alloy shell to tightly fill the insulating and heat-conducting medium for the fixed resistance wire, and the resistor is used to divide the voltage and limit the current. Functional protection fan. This type of resistor structure widely used today is figure 1 as shown, figure 1 Among them, 1 is an aluminum alloy shell, 2 is a wire, 3 is a resistance wire, 4 is a mica sheet, and 5 is a mounting bracket. When installing, first install the 5 pieces of mi...

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Problems solved by technology

[0003] This design structure has some disadvantages. The resistor is often in a vibration environment during use. The filling medium will inevitably loosen after a long period of vibration, and the medium’s ability to protect the resistance wire will gradually weaken, which affects the service life of the resistor. The process of filling the medium Among them, the positioning of the resistance wire cannot be guaranteed, and it cannot be ensured that the resistance wire is in the center of the alloy shell, resulting in uneven heat dissipation of the resistor and affecting performance; the wire and the resistance wire are connected by riveting, and it is easy to There is an open circuit phenomenon; the installation of mica sheets in the aluminum alloy shell is done manually. This process not only wastes time, but also often finds that the mica sheets fall out during the next process after loading, which is not suitable for mass industrial production.

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