CN214215754U - Large-size through type double-diaphragm vacuum booster with long air valve seat stroke - Google Patents

Abstract

The utility model relates to a jumbo size run-through type double diaphragm vacuum booster with long air valve seat stroke belongs to the vacuum booster among the automobile braking system technical field. Including procapsid, the second diaphragm, the second helping hand dish, well casing, first diaphragm, back casing riveting component, first helping hand dish, the valve body, the briquetting, the control valve part, the dust cover, the adjustment fork, the rubber valve part, the air valve seat, the locking plate, the feedback dish, the seal cover, the sealing washer, the rand, the supporting pad, the main cylinder push rod, the push rod head, return spring and guide bar, the locking plate locating column length L1 of valve body is 5.1mm, the locking plate groove width L2 of air valve seat is 6.75 mm. The advantage is novel structure, increases 1mm with the stroke of air valve seat on former basis, has the air intake efficient, and the yield is high, durable long-lived, improve characteristics such as braking effect, security height, assembly nature are good, provide new technical scheme for 11+11 inches run-through vacuum booster's development.

Description

Large-size through type double-diaphragm vacuum booster with long air valve seat stroke

Technical Field

The utility model relates to a vacuum booster assembly among the automobile brake system technical field specifically indicates a 11+11 inches run-through double-diaphragm vacuum booster with long air valve seat stroke.

Background

A booster is a component that increases the force applied to a pedal by a driver using hydraulic pressure, air pressure, vacuum (negative pressure), or electric power. The existing booster comprises an air pressure booster, a vacuum booster, an electric booster, a hydraulic booster and the like, wherein the vacuum booster is divided into a single diaphragm, a double diaphragm, an electronic type, a penetration type, an auxiliary brake and other vacuum boosters.

The conventional double-diaphragm vacuum booster assembly for automobile braking comprises a front shell, a middle shell, a rear shell, a first diaphragm, a second diaphragm, a first boosting disc, a second boosting disc, a valve body, a guide rod, a sealing ring component, a control valve component, a locking plate, a dust cover, an adjusting fork, a pressing block, a feedback disc, a main cylinder push rod, a protection ring, a sealing sleeve, a return spring, a supporting pad, a sealing washer, an O-shaped sealing ring and other main parts.

When the conventional double-diaphragm vacuum booster assembly works, the middle shell, the first diaphragm and the second diaphragm divide the double-diaphragm booster into four cavities, namely two atmospheric cavities and a vacuum cavity, the vacuum cavities are arranged at intervals, one part of the vacuum cavities is communicated with the atmosphere (the atmospheric cavities), and the other part of the vacuum cavities is connected with a vacuum (or negative pressure) source (the vacuum cavities) through a pipeline. By means of the vacuum, the vacuum chamber on one side of the booster is caused to exert a pressure difference on the diaphragm, with respect to the pressure difference of the atmospheric chamber on the other side, so as to generate a thrust force to the vacuum chamber: the servo force is used for enhancing the braking thrust of the brake pedal, so that the braking strength of the driver is reduced. The driver adjusts the pressure difference between the vacuum cavity of the booster and the atmosphere cavity, namely the servo force by controlling the stroke of the brake pedal and the pedal force. The servo force and the input force of the pedal are output to a main cylinder push rod (the output force of the vacuum booster) in the vacuum booster and transmitted to a piston of a brake main cylinder; when released, the pedal force is removed, and the vacuum booster returns to the initial position (or the required position) under the action of the internal spring.

However, with the development of the automobile industry, models with weights of more than 4 tons such as large passenger vehicles and special bulletproof vehicles appear successively, the requirement on the braking effect of a braking system is gradually improved, and the requirement on large-size vacuum boosters is increasing day by day. However, the product size is too large, the volumes of the product atmospheric cavity and the vacuum cavity are increased, and the air inlet efficiency and the air inlet speed gradually become a big problem of rapid braking.

The atmosphere valve port is a channel which is connected with the outside and the atmosphere cavity on the vacuum booster, and is opened and closed under the action of the control valve, so that air can enter the atmosphere cavity, and the boosting effect is further realized. Because at the beginning of booster product design, the booster of maximum specification is 10 inches booster, just can satisfy the operation requirement of car braking, the design of atmospheric valve port aperture also designs under the demand that satisfies the specification and be less than 10 inches booster, each vacuum booster production company has all formed respective platform, atmospheric valve port aperture design is similar basically, nevertheless because the booster of needs bigger specification now, booster atmospheric chamber volume increase 3 times, the efficiency of requirement when current atmospheric valve port can't satisfy quick admit air, when leading to the booster to step on soon, admit air untimely, output power can't reach the target value fast, make braking effect descend, and because the time of admitting air increases, lead to the noise increase more than 20dB of admitting air.

If the scheme of enlarging the atmospheric valve port is adopted in the radial direction, the problems that the investment of the die is large, the product structure is completely changed, and many unknown problems are unforeseeable are caused.

Disclosure of Invention

The utility model provides a jumbo size run-through type double diaphragm vacuum booster with long air valve seat stroke to when solving traditional structure booster assembly and opening because of the atmospheric valve port, the passageway is narrow, causes the problem of the inefficiency of admitting air that the throttle arouses.

The utility model adopts the technical proposal that: the device comprises a front shell, a second membrane, a second power-assisted disc, a middle shell, a first membrane, a rear shell riveting part, a first power-assisted disc, a valve body, a pressing block, a control valve part, a dust cover, an adjusting fork, a rubber valve part, an air valve seat, a locking plate, a feedback disc, a sealing sleeve, a sealing ring, a clamping ring, a supporting pad, a main cylinder push rod, a push rod head, a return spring and a guide rod, wherein the front shell is riveted with the rear shell riveting part which is in interference fit with the valve body to form a sealing shell, the first power-assisted disc and the second power-assisted disc are riveted with the valve body, the control valve part is clamped with the valve body through the locking plate, the feedback disc, the main cylinder push rod, the pressing block and the return spring are assembled on the valve body, the push rod head is fixedly connected with the main cylinder push rod, the dust cover is assembled on the rear shell riveting part, the second membrane is clamped through a hole on the second power-assisted disc, the first membrane is clamped through a hole on the first power-assisted disc, the adjusting fork is installed on the control valve component through threaded connection, the seal sleeve and the middle shell are in interference fit through the seal ring and are fixed by the retainer ring, the support pad is assembled on the guide rod, the rubber valve component and the air valve seat in the control valve component form an atmospheric valve port, the valve body limits the stroke of the air valve seat and controls the opening degree of the atmospheric valve port, the length L1 of the locking plate positioning column of the valve body is 5.1mm, and the width L2 of the locking plate groove of the air valve seat is 6.75 mm.

The feedback disc is made of high-strength rubber materials.

The utility model has the advantages that the structure is novel, compare with traditional jumbo size double diaphragm vacuum booster assembly structure, through changing conventional air valve seat and the relevant size of valve body, increase 1mm with the stroke of air valve seat on former basis, when quick braking, the atmosphere valve port is opened extreme condition, and then increase intake efficiency, reduce reaction time, and adopt the feedback dish of high strength rubber material, under the condition of increasing the atmosphere valve port aperture, prevent to lead to the feedback dish to warp the increase and the reduction of feedback dish life-span that causes because of the air valve seat stroke increase; on the basis of continuing to use the original platform, the device has the characteristics of low investment, high air inlet efficiency, high yield, long durability, high braking effect, high safety, good assembly and the like, and provides a new technical scheme for the development of the 11+11 inch through type vacuum booster.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of a control valve member and a valve body according to the present invention;

FIG. 3 is a schematic structural view of the valve body of the present invention;

FIG. 4 is a schematic view of a prior art valve body;

FIG. 5 is a schematic structural view of the air valve seat of the present invention;

FIG. 6 is a schematic view of a prior art air valve seat construction;

fig. 7 is a schematic structural view of the air valve seat of the present invention during full stroke.

Detailed Description

As shown in fig. 1 and 2, the device comprises a front shell 1, a second diaphragm 2, a second booster disc 3, a middle shell 4, a first diaphragm 5, a rear shell riveting part 6, a first booster disc 7, a valve body 8, a pressing block 9, a control valve part 10, a dust cover 11, an adjusting fork 12, a rubber valve part 13, an air valve seat 14, a locking plate 15, a feedback disc 16, a sealing sleeve 17, a sealing ring 18, a clamping ring 19, a supporting pad 20, a main cylinder push rod 21, a push rod head 22, a return spring 23 and a guide rod 24, wherein the front shell 1 is riveted with the rear shell riveting part 6, the rear shell riveting part 6 is in interference fit with the valve body 8 through rubber to form a sealed shell, the first booster disc 7 and the second booster disc 3 are riveted with the valve body 8, the control valve part 10 is clamped with the valve body 8 through the locking plate 15, the feedback disc 16, the main cylinder push rod 21, the pressing block 9 and the return spring 23 are assembled on the valve body 8, the push rod head 22 is fixedly connected with the main cylinder push rod 21, the dustproof cover 11 is assembled on the riveting part 6 of the rear shell, the second diaphragm 2 is clamped through a hole on the second power disc 3, the first diaphragm 5 is clamped through a hole on the first power disc 7, the adjusting fork 12 is installed on the control valve part 10 through threaded connection, the sealing sleeve 17 is in interference fit with the middle shell 4 through a sealing ring 18 and is fixed by a clamping ring 19, the supporting pad 20 is assembled on the guide rod 24, the rubber valve part 13 and the air valve seat 14 in the control valve part 10 form an atmospheric valve port, the valve body 8 limits the stroke of the air valve seat 14 and controls the opening degree of the atmospheric valve port, referring to fig. 3 and 5, the length L1 of the locking plate positioning column 801 of the valve body 8 is 5.1mm, and the width L2 of the locking plate groove 1401 of the air valve seat 14 is 6.75 mm.

The feedback disc 16 is made of high-strength rubber material.

When the vacuum booster works, the control valve component 10 is pushed by a brake pedal to drive the valve body 8 to move forward, in the process, the atmospheric valve port I is opened, air enters the vacuum booster, when the vacuum booster is rapidly braked, the air valve seat reaches the maximum stroke, the opening degree of the atmospheric valve port reaches the maximum, the air inlet efficiency can be improved to the maximum extent, the air enters an atmospheric cavity through an air channel in the sealing sleeve 17, vacuum pressure difference is formed between the vacuum cavity and the atmospheric cavity, and then the boosting disc 7 and the second boosting disc 3 are driven to play a boosting role; referring to fig. 4 and 6, the width of the air valve seat locking piece groove is increased from original 4.1mm to 5.1mm, the length of the locking piece positioning column of the valve body is increased from original 5.75mm to 6.75mm, and further the stroke of the air valve seat is increased by 1mm on the original basis, when the air valve is rapidly braked, the atmospheric valve port is opened to the limit state, the air intake efficiency is improved, the air intake efficiency is further increased, and the reaction time is reduced, at the moment, because the stroke of the air valve seat is increased, the deformation of the feedback disc is increased, and the service life is seriously reduced, the material of the feedback disc is replaced, high-strength rubber material is used, and under the condition that the opening degree of the atmospheric valve port is increased, the service life of the feedback disc is prevented from being reduced due to the deformation increase of the stroke of the air valve seat; referring to fig. 7, the structural view of the air valve seat during the full stroke is shown, at this time, the air valve seat 14 moves to the maximum stroke and is limited by the valve body 8, the opening degree of the atmospheric valve port reaches the maximum degree, and the opening degree of the atmospheric valve port directly affects the air intake efficiency.

Claims (2)

1. A large-size through type double-diaphragm vacuum booster with long air valve seat stroke comprises a front shell, a second diaphragm, a second boosting disc, a middle shell, a first diaphragm, a rear shell riveting part, a first boosting disc, a valve body, a pressing block, a control valve part, a dust cover, an adjusting fork, a rubber valve part, an air valve seat, a locking plate, a feedback disc, a sealing sleeve, a sealing ring, a clamping ring, a supporting pad, a main cylinder push rod, a push rod head, a return spring and a guide rod, wherein the front shell is riveted with the rear shell riveting part, the rear shell riveting part is in interference fit with the valve body to form a sealing shell, the first boosting disc and the second boosting disc are riveted with the valve body, the control valve part is clamped with the valve body through the locking plate, the feedback disc, the main cylinder push rod, the pressing block and the return spring are assembled on the valve body, the push rod head is fixedly connected with the main cylinder push rod, the dust cover is assembled on the rear shell riveting, the second diaphragm clamps through the hole on the second helping hand dish, and the hole on first diaphragm through first helping hand dish clamps, and the adjustment fork passes through threaded connection and installs on the control valve part, and the seal cover passes through sealing washer interference fit with well casing to it is fixed by the rand, and the supporting pad assembly is on the guide bar, and rubber valve part and air valve seat form the atmosphere valve port in the control valve part, and the valve body is spacing to the stroke of air valve seat, the aperture of control atmosphere valve port, its characterized in that: the length L1 of the locking plate positioning column of the valve body is 5.1mm, and the width L2 of the locking plate groove of the air valve seat is 6.75 mm.

2. A large scale through-going dual diaphragm vacuum booster with long air valve seat travel as claimed in claim 1 wherein: the feedback disc is made of high-strength rubber materials.

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