A booster control valve component with an improved noise reduction structure

Abstract

This utility model relates to a booster control valve component with an improved noise reduction structure, belonging to the field of vacuum booster components in automotive braking system technology. It includes an air valve seat, a rubber valve component, a rubber valve spring, a rubber valve seat, a valve stem return spring, a valve stem return spring seat, a PU sponge filter element, a limiting plate, and a valve stem. The rubber valve seat and the PU sponge filter element are interference-fitted, as are the PU sponge filter element and the valve stem. The limiting plate is slidably connected to the valve stem. The advantages are its novel structure, using a PU sponge filter element instead of the original foam and felt filter elements. After assembly, it provides both noise reduction and dust prevention, avoiding the long-term sealing problems caused by wool fiber shedding from felt, improving intake efficiency and reducing intake noise. Furthermore, eliminating the foam filter element reduces the number of parts, lowers cost and weight, and meets the requirements of OEMs and users.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum booster components in the technology of automotive braking systems, and particularly relates to a booster control valve component with an improved noise reduction structure. Background Technology

[0002] The main components of a conventional vacuum booster assembly with a limit dust cover include: front housing, diaphragm, valve body components, rear housing riveting components, locking plate, dust cover, control valve components, hexagonal thin nut, adjusting fork, rear housing air seal, pressure block, feedback disc, protective ring, support pad, sealing gasket, return spring, master cylinder push rod, push rod head, adjusting pad, and connector seat. After assembly, OEMs have reported issues with this vacuum booster assembly, such as loud intake noise, low intake efficiency, and prolonged sealing problems.

[0003] As the manufacturer, we take this very seriously. Through disassembling and analyzing problematic products, such as the 10-inch through-type vacuum booster assembly, we discovered the cause was noise generated by the control valve components. The control valve components, such as... Figure 4 As shown, the assembly includes an air valve seat 1, a rubber valve component 2, a rubber valve spring 3, a rubber valve seat 4, a valve stem return spring 5, a valve stem return spring seat 6, a foam filter element 10, a felt filter element 11, a limiting plate 8, and a valve stem 9. Since the booster assembly's noise reduction mainly relies on the foam filter element 10 and the felt filter element 11 on the control valve component (the felt filter element is made of wool, and the foam filter element is made of polyurethane foam), during assembly, wool fibers from the felt filter element can become trapped between the control valve component parts and the rear housing air seal, leading to prolonged sealing issues in the assembly. Furthermore, if the felt filter element has too high a density, it will reduce intake efficiency; if the density is too low, it will increase intake noise. Summary of the Invention

[0004] This utility model provides a booster control valve component with an improved silencing structure to solve the existing problems of loud intake noise, low intake efficiency, and unsatisfactory sealing over a long period of time.

[0005] The technical solution adopted by this utility model includes an air valve seat, a rubber valve component, a rubber valve spring, a rubber valve seat, a valve stem return spring, a valve stem return spring seat, a PU sponge filter element, a limiting plate, and a valve stem. The rubber valve seat and the PU sponge filter element are interference-fitted, the PU sponge filter element and the valve stem are interference-fitted, and the limiting plate is slidably connected to the valve stem.

[0006] The physical properties of the PU sponge filter material are a density of 90±20 kg / m³. 3 Breathability 1±0.5m 3 / h, flame retardancy <100mm / min.

[0007] The air valve seat is riveted to the front end of the valve stem, the valve stem return spring is located inside the rubber valve seat, the rubber valve component is fixedly connected to the rubber valve seat, the rubber valve spring is located on the rubber valve seat, the valve stem return spring is clearance-fitted with the valve stem, and the valve stem return spring seat is slidably connected to the valve stem.

[0008] The advantages of this utility model are its novel structure, using a PU sponge filter element to replace the original foam and felt filter elements. This results in fewer new parts, faster improvement, and avoids the problem of replacing felt of different thicknesses and densities to meet customer requirements, which compromises both intake noise and efficiency, and fails to address long-term sealing issues. After assembly, it provides both noise reduction and dust prevention, preventing long-term sealing problems caused by wool fiber shedding from the felt, improving intake efficiency and reducing intake noise. The elimination of the foam filter element reduces the number of parts, lowering cost and weight. It can be used on different sized booster assemblies, including 9-inch, 11-inch, (7+8)-inch, and (8+9)-inch vacuum booster assemblies, providing a good option for vacuum booster assembly development and meeting the requirements of OEMs and users. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0010] 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 PU sponge filter element of this utility model; Figure 3 yes Figure 2 AA section view; Figure 4 This is a schematic diagram of the current control valve components. Detailed Implementation

[0011] 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.

[0012] It includes an air valve seat 1, a rubber valve component 2, a rubber valve spring 3, a rubber valve seat 4, a valve stem return spring 5, a valve stem return spring seat 6, a PU sponge filter element 7, a limiting plate 8, and a valve stem 9. The rubber valve seat 4 and the PU sponge filter element 7 are interference-fitted, the PU sponge filter element 7 and the valve stem 9 are interference-fitted, and the limiting plate 8 and the valve stem 9 are slidably connected.

[0013] The physical properties of the PU sponge filter element 7 material are a density of 90±20 kg / m³. 3 Breathability 1±0.5m 3 / h, flame retardancy <100mm / min.

[0014] The air valve seat 1 is riveted to the front end of the valve stem 9, the valve stem return spring 5 is located inside the rubber valve seat 4, the rubber valve component 2 is fixedly connected to the rubber valve seat 4, the rubber valve spring 3 is located on the rubber valve seat 4, the valve stem return spring 5 is clearance-fitted with the valve stem 9, and the valve stem return spring seat 6 is slidably connected to the valve stem 9.

[0015] Working principle: The PU sponge filter element 7 is installed in the control valve component. Since the PU sponge filter element does not contain wool fibers, there is no need to install a foam filter element for dust prevention. The PU sponge filter element takes into account both noise reduction and dust prevention functions. It can be seen that by simply designing the PU sponge filter element, the problems of loud air intake noise, low air intake efficiency, and long-term unqualified sealing of the control valve component are solved. Moreover, the weight requirements and cost control are reduced.

[0016] 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 booster control valve component with an improved noise reduction structure, comprising an air valve seat, a rubber valve component, a rubber valve spring, a rubber valve seat, a valve stem return spring, a valve stem return spring seat, a PU sponge filter element, a limiting plate, and a valve stem, characterized in that: The rubber valve seat is interference-fitted with the PU sponge filter element, the PU sponge filter element is interference-fitted with the valve stem, and the limit plate is slidably connected to the valve stem.

2. A booster control valve component with an improved silencing structure according to claim 1, characterized in that: The physical properties of the PU sponge filter core material are density 90±20 kg / m 3 , air permeability 1±0.5 m 3 / h, and flame retardancy <100 mm / min.

3. A booster control valve component with an improved silencing structure according to claim 1, characterized in that: The air valve seat is riveted to the front end of the valve stem, the valve stem return spring is located inside the rubber valve seat, the rubber valve component is fixedly connected to the rubber valve seat, the rubber valve spring is located on the rubber valve seat, the valve stem return spring is clearance-fitted with the valve stem, and the valve stem return spring seat is slidably connected to the valve stem.

Images