Two-stage snub braking structure and three-stage snub braking structure provided with filter screens and used on Dongfeng 153

A belt filter, Dongfeng technology, applied in brakes, brake components, transportation and packaging, etc., can solve the problems of affecting valve core sealing, solid particle entry, gas pollution, etc., to simplify the structure, reduce the difficulty of processing, and simplify the installation of springs. Effect

Inactive Publication Date: 2015-03-04
CHANGTONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are generally filters in the pipeline of the braking system, which are used to filter the solid particle impurities flowing with the gas in the air pipe, so as to ensure that each braking component is not affected by solid particle impurities and ensure the reliability of its work. However, due to the distance between the filter and the spool of each valve, it cannot be avoided that the filtered gas will be polluted by other newly generated solid particles before entering the spool. Sometimes solid particles will still enter the spool and affect the spool. The airtightness caused by air leakage accidents, a new solution needs to be put forward

Method used

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  • Two-stage snub braking structure and three-stage snub braking structure provided with filter screens and used on Dongfeng 153
  • Two-stage snub braking structure and three-stage snub braking structure provided with filter screens and used on Dongfeng 153
  • Two-stage snub braking structure and three-stage snub braking structure provided with filter screens and used on Dongfeng 153

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: A two-stage point braking master valve with filter screen and retarder for Dongfeng 153, see figure 1 with figure 2 , from top to bottom sequentially includes the pedal seat 28, the upper body 2413 and the lower body 8, etc. which are sealed and fixed together.

[0031] Wherein, the upper part of the pedal base 28 extends upwards into a tube shape, and a sliding sleeve 30 is sleeved in the center of the pedal base 28 , and a dustproof cover 31 is clamped between the sliding sleeve 30 and the pedal base 28 .

[0032]The pedal 44 is hinged on one side of the pedal seat 28 through the pin shaft 46 , and the pedal 44 is provided with a pin shaft 50 and a flat washer 51 which are pressed together with the upper end of the sliding sleeve 30 .

[0033] The upper end of the inner chamber of the sliding sleeve 30 is sealed and pressed against the upper end of the tappet 29 , and the lower end of the tappet 29 is pressed against the bottom of the central concave hole...

Embodiment 2

[0047] Embodiment 2: A three-stage point braking master valve with filter screen and retarder for Dongfeng 153, the content is basically the same as that of Embodiment 1, the difference is: see Figure 9 , replace the two-stage point brake balance piston assembly with the three-stage point brake balance piston assembly. see Figure 10 , the three-stage point brake balance piston assembly includes a balance piston 37, a spring ferrule 40, a tappet seat 38, the top of the balance piston 37 is a cylindrical disc chamber A, and the bottom of the balance piston 37 protrudes from the space The cavity-shaped protrusion is the rod body chamber B; the upper part of the tappet seat 38 is a disc, and the lower part is a three-stage step rod body that protrudes from the disc 3801, and the first rod body is sequentially from top to bottom. 3803, the second rod body 3804, the third rod body 3805, the lower section of the third rod body 3805 is inserted into the rod body chamber B at the lo...

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Abstract

The invention discloses a two-stage snub braking structure and a three-stage snub braking structure provided with filter screens and used on Dongfeng 153. The two-stage snub braking structure as well as the three-stage snub braking structure comprises a pedal seat, an upper body and a lower body, which are fixed together in a sealing way, wherein a balance piston is sleeved in the upper part of the inner cavity of the upper body; a spring ferrule is sleeved with a primary balance spring; a secondary balance spring is sleeved in the spring ferrule; meanwhile a tertiary balance spring can also be arranged so as to increase the elastic pressure stage by stage and achieve high controllability; an upper valve seat is clamped and fixed on the inner side of an upper valve wall through an elastic collar; a lower valve seat is clamped and fixed on the inner side of a lower valve wall through an elastic collar; the valve element filter screens of a brake valve are simple in structure and convenient to mount, and can be mounted outside the valve element of the brake valve, especially a brake master valve; the filter screens are directly arranged at the periphery of the valve element, can prevent solid particles in air from entering the valve element, and thus greatly improves the working stability of the valve element; and brake accidents are avoided.

Description

technical field [0001] The invention relates to the technical field of parts and components of automobile brake valves, in particular to a two-stage and three-stage point brake structure with a filter screen for Dongfeng 153. Background technique [0002] The braking system of trucks and heavy-duty vehicles in the prior art brakes too quickly, and the foot feel is not easy to control, which will easily cause the brake pads to heat up rapidly, resulting in carbonization, which directly affects the braking effect. bias, affecting the overall stability, resulting in insecurity, or unnecessary economic losses. In order to solve these braking problems of trucks, our unit has successively proposed a series of patents on the two-stage brake master valve and the three-stage balance piston assembly, such as the invention patent with the publication number CN 101837774 A, which can output "secondary point brake". The principle of "point brake" can make the compressed air form pulses...

Claims

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Application Information

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IPC IPC(8): B60T15/06
CPCB60T15/04
Inventor田青锋
OwnerCHANGTONG TECH