A vacuum booster assembly with axial air intake

Abstract

The utility model relates to a vacuum booster assembly with axial air intake belongs to the technical field of automobile brake system. Including front casing, diaphragm, rear shell riveting part, lock piece part, rear shell gas seal, dust cover, valve body part, control valve part, briquetting, feedback disc, retainer, master cylinder push rod and return spring, dust cover tail end has 4 cylindrical extension holes as air inlet hole. The advantage is novel structure, dust cover tail end has air inlet hole and makes it axial air intake, assembles it on vacuum booster, after stepping on pedal, atmospheric air enters vacuum booster inside directly from dust cover tail end air inlet hole, shortens gas operation distance, improves vacuum booster pressure building efficiency. Under the condition of only new dust cover design, can improve vacuum booster pressure reducing efficiency, see effect fast, design, production cost is low, and reduces a foam filter core, cost also has reduced with lateral air intake dust cover, satisfies host factory requirement.

Description

Technical Field

[0001] This utility model belongs to the field of automotive braking system technology, specifically relating to a vacuum booster assembly with axial air intake. Background Technology

[0002] Vacuum boosters are a crucial safety component in modern automotive braking systems. They utilize the vacuum generated by the engine to amplify the relatively small force exerted by the driver's foot, enabling easy and effective brake control and enhancing driving comfort and safety.

[0003] The existing conventional vacuum booster assembly mainly consists of the following parts: front housing 1, diaphragm 2, rear housing riveting component 3, locking plate component 4, rear housing air seal 5, foam filter element 6, dust cover 7, valve body component 8, control valve component 9, pressure block 10, feedback disc 11, retaining ring 12, master cylinder push rod 13, return spring 14, see also Figure 4 After the original vacuum booster assembly was assembled, the OEM reported that during its operation, the vehicle brake decompression was slow and the pressure build-up efficiency was low when the pedal was depressed, leading to customer complaints. Analysis revealed that the existing vacuum booster uses a side intake method, with atmospheric air entering the booster through the side intake port A of the dust cover. (See [link to relevant documentation]). Figure 5 After the atmosphere enters laterally through the foam filter element, it then passes through the dust cover and enters the vacuum booster through the felt filter element of the control valve component, increasing the gas flow distance. See [link / reference needed]. Figure 6 This leads to a decrease in pressure build-up efficiency, so it is necessary to ensure that the vacuum booster assembly provides a product with high pressure build-up efficiency while redesigning the minimum number of parts. Summary of the Invention

[0004] This invention provides a vacuum booster assembly with axial air intake to solve the problem of low pressure build-up efficiency caused by the current use of lateral air intake.

[0005] The technical solution adopted by this utility model includes a front shell, a diaphragm, a rear shell riveting component, a locking plate component, a rear shell air seal, a dust cover, a valve body component, a control valve component, a pressure block, a feedback disc, a protective ring, a master cylinder push rod, and a return spring. The dust cover has four cylindrical extended holes at its tail end as air inlets.

[0006] The dust cover has no air inlets on its sides.

[0007] The front housing, diaphragm, rear housing riveting components, and valve body components are riveted together. The rear housing air seal is installed outside the valve body components. The front end of the dust cover is installed outside the rear housing air seal. The control valve components are installed inside the valve body components. The locking plate components are snapped onto the valve body components. The pressure block is installed at the front end of the control valve components. The feedback disc is installed at the rear of the master cylinder push rod. The protective ring is sleeved on the rear of the master cylinder push rod. The return spring is sleeved on the outside of the master cylinder push rod.

[0008] The advantages of this invention are its novel structure. The dust cover has an air inlet at its tail end, allowing axial air intake. When mounted on a vacuum booster, pressing the pedal allows atmospheric air to directly enter the booster from the air inlet at the tail end of the dust cover, shortening the gas travel distance and improving the booster's pressure-building efficiency. Compared to conventional side-intake vacuum booster assemblies, this invention improves the vacuum booster's pressure reduction efficiency with only a newly designed dust cover, offering rapid results, lower design and production costs, and eliminating the need for a foam filter element, further reducing costs compared to side-intake dust covers, thus meeting OEM requirements.

[0009] This utility model product has passed the DVP test approval of the OEM, and the structure can be used in different types of vacuum booster assemblies. Attached Figure Description

[0010] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the dust cover of this utility model; Figure 3 yes Figure 2 The right view; Figure 4 This is a schematic diagram of the current side-intake vacuum booster assembly; Figure 5 This is a schematic diagram of the current dust cover structure for the side-intake vacuum booster assembly; Figure 6 This is a schematic diagram of the intake operation of the current side intake vacuum booster assembly. Detailed Implementation

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0013] See Figure 1It includes a front housing 1, a diaphragm 2, a rear housing riveting component 3, a locking plate component 4, a rear housing air seal 5, a dust cover 7, a valve body component 8, a control valve component 9, a pressure block 10, a feedback disc 11, a retaining ring 12, a master cylinder push rod 13, and a return spring 14. The dust cover 7 has four cylindrical extension holes 6 at its tail end as air inlets. See [link / reference] Figure 2 , 3 .

[0014] The dust cover 7 has no air inlet on the side.

[0015] The front housing 1, diaphragm 2, rear housing riveting component 3, and valve body component 8 are riveted together. The rear housing air seal 5 is installed outside the valve body component 8. The front end of the dust cover 7 is installed outside the rear housing air seal 5. The control valve component 9 is installed inside the valve body component 8. The locking plate component 4 is snapped onto the valve body component 8. The pressure block 10 is installed at the front end of the control valve component 9. The feedback disc 11 is installed at the rear of the master cylinder push rod 13. The protective ring 12 is sleeved on the rear of the master cylinder push rod 13. The return spring 14 is sleeved on the outside of the master cylinder push rod 13.

[0016] Working principle This utility model improves the pressure build-up efficiency by only redesigning the dust cover 7, based on the original side-intake vacuum booster assembly. When the pedal is pressed, the atmosphere directly enters the booster through the air inlet 6 at the tail end of the dust cover, eliminating the length of the valve body section required for radial air intake. That is, the brake pedal pushes the control valve component 9, which in turn drives the valve body component 8 forward. During this process, the atmospheric valve opens, and air enters the atmospheric chamber of the vacuum booster, creating a vacuum pressure difference between the vacuum chamber and the atmospheric chamber, thereby providing the boosting effect.

[0017] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the scope of protection of the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, any equivalent substitutions or modifications made by those skilled in the art based on the technical solution and the inventive concept of the present invention within the scope of the technical concept disclosed in the present invention shall all fall within the scope of protection of the present invention.

Claims

1. A vacuum booster assembly with axial air intake comprising a front housing, a diaphragm, a rear housing riveted part, a lock plate part, a rear housing air seal, a dust shield, a valve body part, a control valve part, a pressure block, a feedback disc, a retainer, a master cylinder push rod and a return spring, characterized in that: The dust cover has four cylindrical extension holes at the rear end as air inlets.

2. A vacuum booster assembly having axial intake according to claim 1, characterized in that: The dust cover has no air inlets on its sides.

3. A vacuum booster assembly having axial intake according to claim 1, characterized in that: The front housing, diaphragm, rear housing riveting components, and valve body components are riveted together. The rear housing air seal is installed outside the valve body components. The front end of the dust cover is installed outside the rear housing air seal. The control valve components are installed inside the valve body components. The locking plate components are snapped onto the valve body components. The pressure block is installed at the front end of the control valve components. The feedback disc is installed at the rear of the master cylinder push rod. The protective ring is sleeved on the rear of the master cylinder push rod. The return spring is sleeved on the outside of the master cylinder push rod.

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