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Air pump of engineering machinery braking system

A braking system and construction machinery technology, applied in the direction of mechanical equipment, machines/engines, liquid variable capacity machinery, etc., can solve problems such as damage, easy wear of sealing teeth, and product failure, so as to improve service life and reliability performance and high reliability

Inactive Publication Date: 2014-04-30
WUHU SHENGLI TECH SHARES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] like figure 1 As shown, in the prior art, the seal between the air booster pump connecting cover and the push rod used in the braking system of engineering machinery adopts a combination of a central seal ring and an O-ring seal, and the seal teeth of the central seal ring It is easy to be worn, resulting in oil leakage of the product; the push rod and the hydraulic piston are connected by a retaining ring through the hole, and the retaining ring is easy to fall off, resulting in product failure; the push rod seat assembly is positively sealed, and the high-pressure oil impacts the rubber instantly when the product returns, causing its aging , damage, causing brake failure

Method used

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  • Air pump of engineering machinery braking system
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Embodiment Construction

[0018] The specific implementation of the present invention will be described in further detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions of the present invention.

[0019] Such as figure 2 The structure of the present invention expressed is an air booster pump for the brake system of engineering machinery, including a cylinder housing 1, a cylinder piston 3, a push rod 5, a connecting cover 8, a valve assembly 12, a hydraulic piston assembly 13, Hydraulic cylinder block 14; the cylinder housing 1 and connecting cover 8 constitute a cylinder assembly; the hydraulic piston assembly 13 is arranged in the hydraulic cylinder block 14; the cylinder piston 3 is arranged in the cylinder assembly cavity; one end of the push rod 5 is firmly connected with the cylinder piston 3, and the other end passes...

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Abstract

The invention discloses an air pump of an engineering machinery braking system. The air pump comprises a cylinder casing, a cylinder piston, a push rod, a connection cover, a valve assembly, a hydraulic piston assembly and a hydraulic cylinder body. The cylinder casing and the connection cover form a cylinder assembly. The hydraulic piston assembly is arranged in the hydraulic cylinder body. The cylinder piston is arranged in an inner cavity of the cylinder assembly, one end of the push rod is connected with the cylinder piston in a fastening mode, and the other end of the push rod penetrates a center hole of the connection cover to be connected with the hydraulic piston assembly. The connection cover and the push rod are sealed through a Y-shaped sealing ring and a dustproof ring. By means of the technical scheme, the sealing mode between the connection cover and the push rod is changed, sealing is conducted through the Y-shaped ring, the guide sleeve and the dustproof ring, the guide sleeve is added to support the push rod, eccentric abrasion of a piston leather ring and the Y-shaped ring is reduced, and product reliability is improved. Connection of the hydraulic piston and the push rod is changed to be cylindrical pin connection, connection reliability is improved, and the service life of products is prolonged.

Description

technical field [0001] The invention belongs to the technical field of construction machinery brake systems. Specifically, the present invention relates to an air booster pump of an engineering machinery braking system. Background technique [0002] Such as figure 1 As shown, in the prior art, the seal between the air booster pump connecting cover and the push rod used in the braking system of engineering machinery adopts a combination of a central seal ring and an O-ring seal, and the sealing teeth of the central seal ring It is easy to be worn, resulting in oil leakage of the product; the push rod and the hydraulic piston are connected by a retaining ring through the hole, and the retaining ring is easy to fall off, resulting in product failure; the push rod seat assembly is positively sealed, and the high-pressure oil impacts the rubber instantly when the product returns, causing its aging , damage, causing brake failure. Contents of the invention [0003] The invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B9/123F04B53/14F16J15/16B60T11/16
Inventor 乔跃平殷国柱叶新年彭涛王安芝王华林苏一左新珍孙海侠
Owner WUHU SHENGLI TECH SHARES
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