Fuel filter

Abstract

The invention discloses a fuel filter which comprises a filter base, a filter element assembly and a seal ring, wherein the center of the bottom of the filter base is provided with a convex connecting rod; a connecting section is also arranged between the bottom of the filter base and the connecting rod; the diameter of the connecting section is larger than that of the connecting rod, and outer threads are arranged on the connecting section; the center of the top of the filter element assembly is provided with a groove which is matched with the connecting section, and the inner wall of the groove is provided with matched inner threads; a connecting groove which is matched with the connecting rod is arranged under the groove of the filter element assembly; the connecting rod has a circular truncated cone structure with a top down design; and the seal ring is arranged at the bottom of the groove of the filter element assembly, the outer edge is abutted against the groove, and the inner edge is matched with the connecting groove in the size. The double-seal structure of the invention has favorable seal performance, can ensure the seal performance of the fuel filter without tightly screwing an end cover and a filter element on purpose when a filter element is assembled or replaced, solves the problem brought by tightly screwing and is convenient to assemble, disassemble and replace the filter element of the filter.

Description

technical field [0001] The invention relates to a fuel filter and belongs to the technical field of vehicle accessories. Background technique [0002] At present, fuel filters are generally used in existing fuel vehicles. Its function is to filter the garbage, impurities and particles in the fuel through the built-in filter screen, so as to prevent the impurities in the fuel from entering the engine cylinder and causing damage to the engine. damage. [0003] Existing fuel filter see appendix figure 1 As shown, it includes a filter base 1 and a filter element assembly 2. The filter base is generally fixed on the machine, and an inlet 4 and an outlet 5 are provided on it; the filter element assembly mainly includes a sleeve and a filter screen; the bottom center of the filter base is provided with a protruding connecting rod 6, the connecting rod is provided with an external thread, and the top center of the filter element assembly is provided with a matching internal thread...

AI Technical Summary

Problems solved by technology

However, in practical applications, in order to ensure the sealing performance of the fuel filter, workers often screw the filter base and the filter element assembly with a belt wrench, which brings trouble to the next replacement of the filter element assembly. It is easy to disassemble, and the structure of the filter base will be damaged; if the workers are required to reduce the tightening torque of the belt wrench, although the sealing requirements can generally be met, people are often unwilling to take this risk in actual operation

[0005] In addition, the filter base and filter element assembly of the existing fuel filter are made of aluminum, and the threaded connection structure is also made of aluminum, so the thread is easily damaged during the fastening process, resulting in The service life of the filter is reduced and the replacement is frequent. Due to the relatively high cost of aluminum, the cost of frequent replacement of the filter element assembly is also relatively high

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