CN112238847A

CN112238847A - 8-inch vacuum booster with non-uniformly distributed air channel valve bodies

Info

Publication number: CN112238847A
Application number: CN202011152040.XA
Authority: CN
Inventors: 刘佳奇; 徐勇; 乔敏; 潘相旭; 张世强; 倪维海
Original assignee: Jilin Dongguang Aowei Automobile Brake System Co Ltd
Current assignee: Jilin Dongguang Aowei Automobile Brake System Co Ltd
Priority date: 2020-10-25
Filing date: 2020-10-25
Publication date: 2021-01-19

Abstract

The invention relates to an 8-inch vacuum booster with non-uniformly distributed air passage valve bodies, and belongs to a vacuum booster assembly in the technical field of automobile braking systems. The procapsid is riveted with back casing, back casing passes through rubber spare backshell atmoseal interference fit with the valve body, helping hand dish and valve body riveting cooperation, the control valve part passes through the assembly of locking plate joint with the valve body, the feedback dish, the master cylinder push rod, the protective shroud assembly is on the valve body, return spring one end and protective shroud assembly, the other end and procapsid assembly, the dust cover assembly is on the backshell atmoseal, this valve body has 4 air flue of ventilating at the terminal surface, this 4 air flue non-equipartitions of ventilating, all become certain angle, in order to avoid the riveting point when helping hand dish and valve body riveting. The advantage is novel structure, replaces the air flue of ventilating of original equipartition with the air flue of ventilating of non-equipartition, and then makes the riveting point dodge the air flue of ventilating, reaches the ventilation effect, avoids the riveting point to block up the air flue, and then avoids taking place the safety problem, and the security is high, and the fault-tolerant rate is high.

Description

8-inch vacuum booster with non-uniformly distributed air channel valve bodies

Technical Field

The invention relates to a vacuum booster assembly in the technical field of automobile braking systems, in particular to an 8-inch vacuum booster with non-uniformly distributed air channel valve bodies.

Background

With the development of the automobile industry, a riveting type power assisting disc structure is gradually applied to a vacuum power assisting disc assembly, and the conventional vacuum power assisting disc assembly for automobile braking at present comprises a front shell, a rear shell, a diaphragm, a power assisting disc, a valve body, a rear shell air seal, a control valve component, a locking plate, a dust cover, a feedback disc, a main cylinder push rod, a guard ring, a return spring and other main parts. The structure is that the valve body and the booster disc are riveted to form a part, and the vacuum booster assembly has the advantages of good stability, good safety, good durability and the like.

When the conventional vacuum booster works, the diaphragm divides the vacuum booster into two cavities, namely a vacuum cavity and an atmospheric cavity, the control valve component and the valve body are driven to move by the input force of the brake pedal, the atmospheric cavity is communicated with the atmosphere, and the boosting disc generates a boosting effect under the action of atmospheric pressure.

When vacuum booster does not have the vacuum and steps on soon, vacuum cavity and atmosphere chamber are the ordinary pressure state, owing to step on the footboard soon, advance fast in other words helping hand dish, can cause the air current to flow, and vacuum cavity and atmosphere chamber are separated by the diaphragm, and the air current that flows under this state has certain impact to the diaphragm, if do not have the passageway of ventilating, can lead to the diaphragm to break away from the assembled position, and then leads to the vacuum booster assembly to lose effect, causes the consequence that can not estimate.

Generally speaking, the method for solving the problem is to leave a ventilation air passage on the valve body to connect the vacuum cavity and the atmosphere cavity, in the past design scheme, in order to achieve better ventilation effect, 4 uniformly distributed circular ventilation channels are generally designed on the valve body, but in the actual assembly process, the 4 ventilation channels can be blocked by 6 riveted riveting points, so that the effect of the ventilation channels is reduced, even the ventilation channels are blocked, and further the problems of unsmooth ventilation and the like are caused.

Disclosure of Invention

The invention provides an 8-inch vacuum booster with valve bodies with non-uniformly distributed air passages, which aims to solve the problem that riveting points block the air passages due to riveting of a booster disc and improve the safety of the vacuum booster when the vacuum booster is quickly stepped on without vacuum.

The technical scheme adopted by the invention is as follows: the pneumatic control valve comprises a front shell, a diaphragm, a power-assisted disc, a rear shell, a valve body, a rear shell air seal, a control valve component, a locking plate, a dust cover, a feedback disc, a main cylinder push rod, a retainer and a return spring; wherein procapsid and back casing riveting, back casing passes through rubber spare backshell atmoseal interference fit with the valve body, helping hand dish and valve body riveting cooperation, the control valve part passes through the assembly of locking plate joint with the valve body, the feedback dish, the master cylinder push rod, the protective shroud assembly is on the valve body, return spring one end and protective shroud assembly, the other end and procapsid assembly, the dust cover assembly is on the backshell atmoseal, this valve body has 4 air flue of ventilating at the terminal surface, this 4 air flue non-equipartitions of ventilating, all become certain angle, in order to avoid the riveting point when helping hand dish and valve body riveting.

The 4 ventilation air passages comprise a first ventilation air passage, a second ventilation air passage, a third ventilation air passage and a fourth ventilation air passage, wherein the included angle between the first ventilation air passage and the second ventilation air passage is 40 degrees +/-1 degree, the included angle between the second ventilation air passage and a horizontal line is 47.5 degrees +/-1 degree, the included angle between the horizontal line and the third ventilation air passage is 82.5 degrees +/-1 degree, and the included angle between the third ventilation air passage and the fourth ventilation air passage is 95 degrees +/-1 degree.

The invention has the advantages of novel structure, non-uniform distribution of the ventilation air passages to replace the original uniform distribution of the ventilation air passages, further avoiding the riveting points from the ventilation air passages, achieving the ventilation effect, avoiding the blockage of the air passages by the riveting points, further avoiding the safety problem, having high safety and high fault-tolerant rate, well solving the problem that the traditional booster assembly has no vacuum and quickly steps on the diaphragm to fall off, and improving the safety.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the valve body of the present invention;

fig. 3 is a schematic view of the riveting of the valve body and the booster disk of the present invention.

Detailed Description

Referring to fig. 1 and 3, the pneumatic control valve comprises a front shell 1, a diaphragm 2, a power disc 3, a rear shell 4, a valve body 5, a rear shell air seal 6, a control valve component 7, a locking plate 8, a dust cover 9, a feedback disc 10, a main cylinder push rod 11, a retainer 12 and a return spring 13; wherein procapsid 1 and rear housing 4 are riveted, rear housing 4 passes through 6 interference fit of rubber spare backshell atmoseal with valve body 5, reach sealed effect, helping hand dish 3 and valve body 5 riveting cooperation, control valve part 7 passes through 8 joint assemblies of locking plate with valve body 5, feedback dish 10, master cylinder push rod 11, the protective shroud 12 assembles on

valve body

5, 13 one end of return spring is assembled with the protective shroud, the other end is assembled with procapsid 1, dust cover 9 assembles on backshell atmoseal 6, see figure 2, this valve body has 4 air flue of ventilating at the terminal surface, 4 air flue non-equipartitions of ventilating, all become certain angle, in order to avoid the riveting point when helping hand dish and valve body riveting, see figure 3, can see that air flue position and riveting point position avoid.

Referring to fig. 2, the 4 ventilation air flues comprise a first ventilation air flue 501, a second ventilation air flue 502, a third ventilation air flue 503 and a fourth ventilation air flue 504, wherein the included angle between the first ventilation air flue 501 and the second ventilation air flue 502 is 40 ° ± 1 °, the included angle between the second ventilation air flue 502 and the horizontal line is 47.5 ° ± 1 °, the included angle between the horizontal line and the third ventilation air flue 503 is 82.5 ° ± 1 °, and the included angle between the third ventilation air flue 503 and the fourth ventilation air flue 504 is 95 ° ± 1 °.

When the vacuum booster works, the control valve part 7 is pushed by a brake pedal to drive the valve body 5 to advance, in the process, an atmospheric valve port is opened, air enters an atmospheric cavity of the vacuum booster, so that a vacuum pressure difference is formed between the vacuum cavity and the atmospheric cavity, and the power disc 3 is driven to play a power assisting role;

the non-uniform ventilation air passages are used for replacing the original uniform ventilation air passages, so that the phenomenon that riveting points of the valve body part coincide with the ventilation air passages when in riveting and the ventilation air passages are blocked is avoided; and then avoid the phenomenon that the diaphragm breaks away from the booster that the assembly position caused and became invalid when there was not the vacuum to step on soon.

Claims

1. An 8-inch vacuum booster with valve bodies with non-uniformly distributed air passages comprises a front shell, a diaphragm, a boosting disc, a rear shell, a valve body, a rear shell air seal, a control valve component, a locking plate, a dust cover, a feedback disc, a main cylinder push rod, a guard ring and a return spring; wherein procapsid and back casing riveting, back casing pass through rubber spare backshell atmoseal interference fit with the valve body, and helping hand dish and valve body riveting cooperation, control valve part pass through the assembly of locking plate joint with the valve body, and feedback dish, master cylinder push rod, protective shroud assembly are on the valve body, return spring one end and protective shroud assembly, and the other end assembles with the procapsid, and the dust cover assembly is on the back casing atmoseal, its characterized in that: this valve body has 4 air flues of ventilating at the terminal surface, and these 4 air flues of ventilating are the non-equipartition, all become certain angle to avoid the riveting point when helping hand dish and valve body rivet.

2. An 8 inch vacuum booster with a non-uniform air passage valve body as in claim 1 wherein: the 4 ventilation air passages comprise a first ventilation air passage, a second ventilation air passage, a third ventilation air passage and a fourth ventilation air passage, wherein the included angle between the first ventilation air passage and the second ventilation air passage is 40 degrees +/-1 degree, the included angle between the second ventilation air passage and the horizontal line is 47.5 degrees +/-1 degree, the included angle between the horizontal line and the third ventilation air passage is 82.5 degrees +/-1 degree, and the included angle between the third ventilation air passage and the fourth ventilation air passage is 95 degrees +/-1 degree.