Plastic wheel cylinder of rear drum brake of automobile

Abstract

The invention discloses a plastic wheel cylinder of a rear drum brake of an automobile. A steel pipe is inlaid between a plastic inner pipe and a plastic outer shell and is inject-molded into a whole. Two end faces of the steel pipe are respectively provided with convex plates which are extruded outward and evenly distributed to guarantee that the steel pipe is inlaid into the plastic. The plastic outer shell is provided with a convex plate surface, a plurality of rectangular grooves which are perpendicular to the axes of plastic outer pipes and have identical number with the axis of the plastic outer pipes are formed in an oil pipe seat along two sides of the plastic outer shell, and the oil pipe seat is inlaid in the convex plate surface of the plastic outer shell through the rectangular grooves. Air deflating screw holes and oil inlet holes communicated with the plastic inner pipe are formed in the oil pipe seat. The plastic wheel cylinder of the rear drum brake of the automobile is inject-molded at one time, and is simple in molding and processing technic, and short in producing cycle. Due to the fact that the inner wall of the plastic wheel cylinder of the rear drum brake of the automobile is made of plastic, the plastic wheel cylinder of the rear drum brake of the automobile needs no machining, is strong in corrosion resistance, and is not prone to being corroded by brake fluid. The inlaid steel pipe sleeve guarantees sufficient mechanical property, and the plastic wheel cylinder of the rear drum brake of the automobile is not prone to being stressed to deform. In addition, the plastic replaces metal materials, the total weight of the wheel cylinder is small, and customer satisfaction degree is beneficial to improve.

Description

technical field [0001] The invention relates to a rear drum brake of an automobile, in particular to a plastic wheel cylinder of the rear drum brake of an automobile. Background technique [0002] With the rapid development of science and technology, automotive products are developing in the direction of light weight, high speed, energy saving, comfort, multi-function, low cost and long life. However, the current domestically produced automobile brake wheel cylinders are all formed by metal casting and require mechanical processing. The manufacturing process is relatively complicated, the processing procedures are numerous, the production cycle is long, and the cost is relatively high. [0003] Therefore, it is a major issue for us to keep pace with the times to replace traditional metal materials with high-performance composite materials and apply them to the production of brake wheel cylinders. Contents of the invention [0004] In view of the disadvantages of the metal...

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Problems solved by technology

[0004] In view of the disadvantages of the metal wheel cylinder in the background technology, such as complex manufacturing process, numerous processing procedures, and long production cycle, the purpose of the present invention is to provide a plastic wheel cylinder for automobile rear drum brakes, whose shape and processing technology are simple and fast, and the production cycle is short , and has good mechanical properties

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