Two-stage and three-stage point brake structure with filter

A spot brake and filter screen technology is applied in the field of secondary and tertiary spot brake structures with filters, which can solve the problems of affecting valve core sealing, poor fit, and high cost, improving work reliability and simplifying spring installation. , the effect of avoiding braking accidents

Inactive Publication Date: 2017-01-04
CHANGTONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The key component in the above patent is the spring ferrule. Due to the special shape of the spring ferrule and the complicated processing technology, it needs to be finished on a lathe after casting, and the cost is relatively high.
The precision dimension of the spring ferrule has high requirements, and the defective rate is very high after inspection.
In addition, due to the poor compatibility of various components, there is also the problem of complex installation process, and the test performance after installation is different, and the regularity is poor, which needs to be improved
[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 and three-stage point brake structure with filter
  • Two-stage and three-stage point brake structure with filter
  • Two-stage and three-stage point brake structure with filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: A two-stage point brake master valve with filter screen and retarder, see figure 1 and 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 of the tappet se...

Embodiment 2

[0047] Embodiment 2: A three-stage point braking master valve with filter screen and retarder, 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 lower part of the b...

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Abstract

The invention discloses a two-stage and three-stage point brake structure with a filter screen, which includes a pedal seat, an upper body and a lower body sealed and fixed together, a balance piston is set on the upper part of the upper body cavity, and a spring ferrule is set outside There is a first-level balance spring, and a second-level balance spring is installed inside; at the same time, a third-level balance spring can also be set to increase the elastic pressure step by step and provide a strong sense of control. The upper valve seat is fixed on the inner side of the upper valve wall through the elastic retaining ring; the lower valve seat is fixed on the inner side of the lower valve wall through the elastic retaining ring. The brake valve spool filter has a simple structure and is easy to install. It can be installed outside the spool of the brake valve, especially the brake master valve. Into the spool, thereby greatly improving the reliability of the spool; avoiding brake accidents.

Description

technical field [0001] The invention relates to the technical field of components of automobile brake valves, in particular to a two-stage and three-stage point brake structure with a filter screen. 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 in the control pipe sectio...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B60T15/06
Inventor田青锋
OwnerCHANGTONG TECH