Air valve structure on a cylinder of a brake booster

Abstract

The utility model provides a kind of air valve structure on the cylinder body of brake booster, including cylindrical exhaust column, and the outer side wall of exhaust column is equipped with outer thread, the front end of the exhaust column is equipped with the cylindrical exhaust part coaxial with it, and the front end of exhaust part is conical and forms sealing slope one;Exhaust part and the inside of exhaust column are equipped with exhaust hole, and the outer side wall of exhaust part is equipped with the exhaust port of exhaust hole communication.Exhaust column is screwed, and sealing slope one of the lower end of exhaust column cooperates with the sealing slope two of the connecting section of exhaust passage and forms sealing when not exhausting.It is loosened when needing exhaust, and the sealing contact of sealing slope one of the lower end of exhaust column and sealing slope two is separated, so that the gas in cylinder body can pass through exhaust section and enter connecting section, then enter the exhaust gap formed between the inner wall of exhaust part and exhaust section, and then pass through exhaust port and exhaust hole and discharge.

Description

Technical Field

[0001] This utility model relates to the field of brake booster technology, specifically to a valve structure on the cylinder of a brake booster. Background Technology

[0002] As a key component of the automotive braking system, the brake booster plays a crucial role in improving braking performance and reducing the driver's workload. Its working principle involves utilizing the air intake during engine operation to create a vacuum on one side of the booster, while the other side operates at normal air pressure. This pressure difference drives the piston, thus assisting the driver in braking. Inside the brake booster's cylinder, the piston reciprocates under air pressure to achieve the braking assistance function.

[0003] Currently, brake booster cylinders typically have vent holes to expel gases from the cylinder. However, existing venting designs generally have several problems. Some venting designs are complex, involving numerous components, which not only increases manufacturing costs but also makes installation and maintenance cumbersome and prone to malfunction. Regarding ease of operation, some venting designs require specific tools or complex procedures to achieve venting, increasing the difficulty and time cost for ordinary users or repair personnel. Utility Model Content

[0004] In view of the problems pointed out in the background art, this utility model proposes a valve structure on the cylinder of a brake booster to solve the above-mentioned technical problems.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A valve structure on the cylinder of a brake booster includes a cylindrical exhaust column with external threads on its outer side wall. The exhaust column has a coaxial cylindrical exhaust section at its front end, the diameter of which is smaller than that of the exhaust column. The front end of the exhaust section is tapered and forms a sealing slope. The exhaust section and the exhaust column have exhaust holes inside, the exhaust holes extending through the rear end of the exhaust column, and the outer side wall of the exhaust section has an exhaust port connected to the exhaust hole.

[0007] The present invention is further provided that an annular pressure ring is provided on the outer side wall of the rear end of the exhaust column.

[0008] The present invention is further configured such that an annular groove is provided on the front side of the pressure ring, and a sealing ring is connected in the groove.

[0009] The present invention is further configured such that a hexagonal operating part is provided on the outer side wall of the rear end of the exhaust column, and the operating part is located on the rear side of the pressure ring.

[0010] The present invention is further configured such that the rear end of the exhaust column is connected to an exhaust connector coaxial with the exhaust column, and the exhaust connector is configured to communicate with the exhaust hole.

[0011] The present invention is further configured to include a cylinder body, wherein an exhaust channel communicating with the inner cavity of the cylinder body is provided on the outer side wall of the cylinder body, the exhaust channel is composed of an exhaust section and a connecting section, the diameter of the connecting section is larger than the diameter of the exhaust section, and the inner wall of the connecting section is provided with an internal thread that is threadedly connected to the exhaust column; the bottom of the connecting section is conical and forms a second sealing slope, the angle between the second sealing slope and the horizontal plane is smaller than the angle between the first sealing slope and the horizontal plane.

[0012] The present invention is further configured such that a column is provided on the outer wall of the cylinder, and the exhaust passage is provided on the column.

[0013] The present invention is further configured such that the diameter of the exhaust section is equal to the diameter of the exhaust hole.

[0014] The present invention is further configured such that an exhaust gap is formed between the inner wall of the exhaust portion and the exhaust section.

[0015] The present invention is further configured such that the diameter of the exhaust port is smaller than the diameter of the exhaust hole.

[0016] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0017] The air valve structure on the cylinder of the brake booster provided by this utility model consists of a single component, with a simple overall structure and convenient operation.

[0018] When not venting, tighten the vent column. The sealing bevel at the lower end of the vent column and the sealing bevel at the connecting section of the vent channel will cooperate to form a seal.

[0019] When exhaust is required, loosen the exhaust column. The sealing contact between the first sealing bevel and the second sealing bevel at the lower end of the exhaust column will separate. In this way, the gas in the cylinder can enter the connecting section through the exhaust section, then enter the exhaust gap formed between the exhaust section and the inner wall of the exhaust section, and then enter the exhaust port through the exhaust port for discharge.

[0020] The sealing fit between the first and second conical sealing bevels is not a surface contact sealing fit, but a near-linear tangential contact sealing fit. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the air valve of this utility model.

[0023] Figure 2 This is a cross-sectional view of the air valve of this utility model.

[0024] Figure 3 This is an exploded view of the connection between the valve and the cylinder body of this utility model.

[0025] Figure 4 This is a cross-sectional view of the connection between the air valve and the cylinder body of this utility model.

[0026] The following are the labels in the attached diagram: 1. Exhaust column; 2. Exhaust section; 3. Sealing bevel 1; 4. Exhaust hole; 5. Exhaust port; 6. Pressure ring; 7. Groove; 8. Sealing ring; 9. Operating part; 10. Exhaust connector; 11. Cylinder body; 12. Exhaust section; 13. Connecting section; 14. Sealing bevel 2; 15. Column; 16. Exhaust gap. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] For reference as follows Figure 1-4 The present invention will be described as follows:

[0029] Example: A valve structure on the cylinder of a brake booster mainly consists of two parts: an exhaust column and an exhaust passage on the cylinder.

[0030] The exhaust column 1 is cylindrical and has external threads on its outer side wall. This design provides the basis for the connection between the exhaust column 1 and the cylinder block 11. It is a key structure for achieving the connection with the cylinder block 11.

[0031] The exhaust column 1 has a coaxial cylindrical exhaust section 2 at its front end. The diameter of the exhaust section 2 is smaller than that of the exhaust column 1. This dimensional difference creates a stepped structure between the exhaust section and the exhaust column, facilitating subsequent integration with the exhaust channel.

[0032] The front end of the exhaust section 2 is conical and forms a sealing slope 3; this slope plays a key role in the sealing function of the air valve.

[0033] The exhaust section 2 and the exhaust column 1 are equipped with an exhaust hole 4 inside, which extends through the rear end of the exhaust column 1. The outer wall of the exhaust section 2 is equipped with an exhaust port 5 that connects to the exhaust hole 4. This channel design provides a path for gas to be discharged. Gas can enter the exhaust hole 4 through the exhaust port 5 and then be discharged to the outside.

[0034] It also includes a cylinder 11, on the outer side wall of which is provided an exhaust passage communicating with the inner cavity of the cylinder 11. The exhaust passage is composed of an exhaust section 12 and a connecting section 13. The diameter of the connecting section 13 is larger than the diameter of the exhaust section 12. This design allows the connecting section 13 to accommodate part of the structure of the exhaust column 1, while providing transition space for gas flow.

[0035] The inner wall of the connecting section 13 is provided with an internal thread for threaded connection with the exhaust column 1; through the threaded connection, the exhaust column can be detachably connected to the cylinder block, which is convenient for installation and maintenance. Through the threaded connection, the exhaust column 1 can be fixed and its position adjusted on the cylinder block 11.

[0036] The bottom of the connecting section 13 is tapered, forming a second sealing slope 14. The angle between the second sealing slope 14 and the horizontal plane is smaller than the angle between the first sealing slope 3 and the horizontal plane. This angle design is the basis for achieving a special sealing fit between the two. When the exhaust column 1 is tightened, the first sealing slope 3 and the second sealing slope 14 come into contact. Due to the angle difference, they do not make full contact, but rather form a near-linear tangential contact. This contact method can reduce the contact area while ensuring the sealing effect, thereby reducing the risk of wear and seal failure.

[0037] An exhaust gap 16 is formed between the inner walls of the exhaust section 2 and the exhaust segment 12. This gap is an important channel for gas flow.

[0038] When venting is not required, tighten the exhaust column. At this time, the sealing bevel at the lower end of the exhaust column and the sealing bevel at the connecting section of the exhaust channel fit tightly together, forming an effective seal and preventing gas from escaping from the cylinder. When venting is required, loosen the exhaust column. The sealing bevel and the sealing bevel separate, and the gas in the cylinder enters the connecting section through the exhaust section, then enters the exhaust port through the exhaust gap and exhaust port, and finally exits outside the cylinder.

[0039] It is worth noting that the sealing fit between the first and second conical sealing bevels is not a surface contact seal, but rather a near-linear tangential contact seal. This sealing method benefits from the angle difference between the two surfaces. When the vent column is tightened, the two bevels can achieve a tight fit in a line contact manner, which not only ensures the reliability of the seal, but also reduces the contact area and minimizes the impact of factors such as surface roughness on the sealing effect. At the same time, it facilitates quick separation when loosening, ensuring timely venting.

[0040] Overall, this valve structure achieves simplicity and ease of operation through the rational design of the shape, size, and fit of the exhaust column 1 and the exhaust passage on the cylinder 11. Switching between sealing and venting can be accomplished simply by tightening or loosening the exhaust column 1. Furthermore, the functions of each component are clearly defined, and their tight fit effectively meets the venting requirements of the brake booster.

[0041] An annular pressure ring 6 is provided on the outer wall of the rear end of the exhaust column 1. An annular groove 7 is provided on the front side of the pressure ring 6, and a sealing ring 8 is connected in the groove 7. When the exhaust column 1 is tightened, the sealing ring 8 is squeezed by the pressure ring 6 and the cylinder wall, undergoes elastic deformation, and is pressed between the two. This design, through the elastic sealing effect of the sealing ring 8, forms a secondary seal on the basis of the original sealing bevel fit, further enhancing the overall sealing performance of the valve, effectively preventing gas leakage from the connection gap between the exhaust column and the cylinder, and improving the reliability of the seal.

[0042] A hexagonal operating part 9 is provided on the outer wall of the rear end of the exhaust column 1, and the operating part 9 is located behind the pressure ring 6. The hexagonal structure is compatible with the clamping surface of tools such as wrenches, and the operator can apply torque to the operating part 9 through the wrench to tighten or loosen the exhaust column 1. This design standardizes the operating interface, reduces the difficulty of operation, ensures the stability of force transmission during tightening / loosening, avoids the slippage problem that may occur during manual operation, and improves operating efficiency and convenience.

[0043] The exhaust column 1 is connected to an exhaust connector 10 coaxial with the exhaust column 1 at its rear end, and the exhaust connector 10 is connected to the exhaust port 4. The exhaust connector 10 provides a standardized interface for the connection between the exhaust system and the external exhaust pipe. Through this connector, the gas discharged from the cylinder can be guided to a designated exhaust path (such as the main exhaust pipe of the car or the atmosphere), avoiding direct gas emission and interference with surrounding components. At the same time, it facilitates the layout and connection of pipelines according to actual exhaust requirements.

[0044] A column 15 is provided on the outer side wall of the cylinder block 11, and the exhaust passage is located inside the column 15. The design of the column 15 makes the exhaust passage and the cylinder body form a modular structure, which not only facilitates the processing and manufacturing of the exhaust passage (the column 15 can be drilled, tapped and other processes can be performed separately), but also enhances the structural strength of the connection between the exhaust passage and the cylinder block, and reduces the stress concentration of the cylinder wall caused by gas pressure fluctuations.

[0045] The diameter of exhaust section 12 is equal to the diameter of exhaust port 4. This dimensional matching ensures the consistency of the channel cross-section when gas flows between exhaust section 12 and exhaust port 4, reduces local resistance loss during gas flow, and allows gas to be discharged more smoothly through the exhaust channel.

[0046] The diameter of exhaust port 5 is smaller than the diameter of exhaust hole 4. This design allows exhaust port 5 to have a certain throttling effect, which can control the flow rate of gas from exhaust gap 16 into exhaust hole 4.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A valve structure on the cylinder block of a brake booster, comprising a cylindrical exhaust column, wherein the outer side wall of the exhaust column is provided with external threads, characterized in that: The exhaust column has a coaxial cylindrical exhaust section at its front end. The diameter of the exhaust section is smaller than that of the exhaust column. The front end of the exhaust section is conical and forms a sealing slope. The exhaust section and the exhaust column have exhaust holes inside. The exhaust holes are set through the rear end of the exhaust column. The outer wall of the exhaust section has an exhaust port connected to the exhaust hole.

2. The valve structure on the cylinder of a brake booster according to claim 1, characterized in that: The exhaust column has an annular pressure ring on the outer side wall at the rear end.

3. The valve structure on the cylinder of a brake booster according to claim 2, characterized in that: The pressure ring has an annular groove on its front side, and a sealing ring is connected inside the groove.

4. The valve structure on the cylinder of a brake booster according to claim 2, characterized in that: The exhaust column has a hexagonal operating part on the outer side wall at the rear end, and the operating part is located on the rear side of the pressure ring.

5. The valve structure on the cylinder of a brake booster according to claim 4, characterized in that: The rear end of the exhaust column is connected to an exhaust connector coaxial with the exhaust column, and the exhaust connector is connected to the exhaust port.

6. The valve structure on the cylinder of a brake booster according to any one of claims 1-5, characterized in that: It also includes a cylinder block, on the outer side wall of which is provided an exhaust passage communicating with the inner cavity of the cylinder block. The exhaust passage consists of an exhaust section and a connecting section. The diameter of the connecting section is larger than the diameter of the exhaust section. The inner wall of the connecting section is provided with an internal thread that is threaded to the exhaust column. The bottom of the connecting section is conical and forms a second sealing slope. The angle between the second sealing slope and the horizontal plane is smaller than the angle between the first sealing slope and the horizontal plane.

7. The valve structure on the cylinder of a brake booster according to claim 6, characterized in that: A column is provided on the outer wall of the cylinder block, and the exhaust passage is provided on the column.

8. The valve structure on the cylinder of a brake booster according to claim 6, characterized in that: The diameter of the exhaust section is equal to the diameter of the exhaust port.

9. The valve structure on the cylinder of a brake booster according to claim 6, characterized in that: An exhaust gap is formed between the inner wall of the exhaust section and the exhaust part.

10. The valve structure on the cylinder of a brake booster according to claim 1, characterized in that: The diameter of the exhaust port is smaller than the diameter of the exhaust hole.

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