A lateral annular intake structure on a cylinder of a brake booster

Abstract

The utility model provides a kind of lateral annular air intake structure on the cylinder of brake booster, including plug, recessed accommodating groove is equipped on the lower end surface of plug;Plug is equipped with passageway one with accommodating groove intercommunication along its axial direction, passageway two is equipped with with passageway one intercommunication along its radial direction on plug, passageway two is set through the radial outer side wall of plug;Annular connecting groove is equipped on the side wall of accommodating groove, snap spring is connected in connecting groove;Including plugging piece and spring one, plugging piece is located in the inside of spring one, the lower end of spring one is in abutment with snap spring, the upper end of spring one is in abutment with plugging piece, plugging piece forms the plugging of passageway one under the action of the elasticity of spring one.The air intake structure of the present application is composed of plug and other components, and the other components are installed in the accommodating groove of the plug. In this way, when disassembling the air intake structure, only the plug needs to be removed from the cylinder, and the disassembly of the entire air intake structure can be completed, facilitating the disassembly and maintenance of the air intake structure.

Description

Technical Field

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

[0002] In automotive braking systems, brake boosters play a crucial role, effectively reducing the driver's effort and improving braking performance and driving safety. The working principle of a brake booster utilizes the vacuum generated by the engine or a vacuum pump installed in a diesel engine. When the driver depresses the brake pedal, the pressure difference between the two working chambers within the booster amplifies the brake pedal force proportionally to push the master cylinder piston. This compresses the brake fluid in the master cylinder, generating hydraulic pressure, which is then delivered to the wheel brakes. This pressure causes the brake shoes to contact the wheel hubs, creating frictional resistance to control vehicle deceleration or braking.

[0003] Brake boosters typically have an air intake port on their cylinder, with a one-way air intake structure inside to ensure that air enters the booster in a specific direction and maintains the booster's normal operation.

[0004] However, common one-way intake structures are generally composed of multiple components, making them relatively complex. When disassembling a one-way intake structure, its structural characteristics prevent the entire structure from being removed from the intake port in one go. This not only increases the difficulty and time cost of maintenance, but also, due to the need for multiple operations and disassembly of multiple components during disassembly, can easily damage related parts, thus affecting the overall performance and lifespan of the brake booster and hindering efficient maintenance and upkeep. Utility Model Content

[0005] In view of the problems pointed out in the background art, the present invention proposes a lateral annular air intake structure on the cylinder of a brake booster to solve the above-mentioned technical problems.

[0006] The technical solution of this utility model is implemented as follows:

[0007] A lateral annular air intake structure on the cylinder block of a brake booster includes a plug, the outer wall of which has external threads.

[0008] The lower end face of the plug is provided with a recessed receiving groove;

[0009] The plug has a channel 1 along its axial direction that communicates with the receiving groove, and a channel 2 along its radial direction that communicates with the channel 1. The channel 2 is provided through the radial outer wall of the plug.

[0010] The side wall of the receiving groove is provided with an annular connecting groove, and a retaining spring is connected inside the connecting groove;

[0011] It also includes a sealing component and a spring. The sealing component is located inside the spring. The lower end of the spring abuts against the snap ring, and the upper end of the spring abuts against the sealing component. Under the action of the elastic force of the spring, the sealing component forms a blockage of the channel.

[0012] The present invention is further configured such that the plug is composed of a connecting section, an air intake section, and an operating section from bottom to top, wherein the outer diameter of the operating section is larger than the outer diameter of the air intake section, and the outer diameter of the air intake section is larger than the outer diameter of the connecting section.

[0013] The outer wall of the connecting section is provided with external threads; the second channel is set through the outer wall of the air intake section.

[0014] The present invention is further configured such that an annular sealing groove 1 is provided on the outer wall of the upper end of the connecting section, and an annular sealing groove 2 is provided on the outer wall of the upper end of the air intake section, and a sealing ring is connected in the sealing groove 1 and the sealing groove 2.

[0015] The present invention is further configured to include a cylinder body, a protruding column on the side wall of the cylinder body, an installation groove on the upper side of the column, a threaded hole at the bottom of the installation groove communicating with the inner cavity of the cylinder body, a connecting section connected to the threaded hole, an air intake section located in the installation groove, the outer diameter of the air intake section being smaller than the diameter of the installation groove, an annular pressure cap connected in the installation groove, after the plug is tightened, the pressure cap is pressed between the bottom of the installation groove and the operating section, the lower end of the pressure cap forming a sealed connection with the installation groove, the upper end of the pressure cap forming a sealed connection with the operating section, an air intake pipe extending radially from the outer side wall of the pressure cap, the air intake pipe communicating with the inner side of the pressure cap; the pressure cap and the air intake section are spaced apart radially from each other.

[0016] The present invention is further configured such that the bottom surface of the receiving groove is provided with a downwardly protruding, annular sealing part, and the channel is located inside the sealing part.

[0017] The present invention is further configured such that the sealing component includes a cylindrical outer shell, the upper edge of the outer shell is provided with a flange, and the upper end of the first spring abuts against the flange; the upper side of the outer shell is provided with a recessed groove 1, the bottom of the first groove is provided with a recessed groove 2, the bottom of the second groove is provided with a through hole penetrating the lower side of the outer shell, a movable component that can slide up and down is adapted and connected in the second groove, the movable component is provided with a downward opening, the upper end of the movable component is wrapped with an elastic body, and the upper side of the elastic body forms a sealing plane that cooperates with the sealing part; a guide rod is slidably connected in the through hole, the upper end of the guide rod extends into the movable component and is slidably connected to the movable component, the diameter of the upper end of the guide rod is larger than the diameter of the through hole, the upper side of the guide rod is provided with a second spring, the lower end of the second spring abuts against the guide rod, and the upper end of the second spring abuts against the movable component.

[0018] The present invention is further configured such that an annular sealing groove three is provided on the side wall at the upper end of the threaded hole, and the sealing groove three is provided in correspondence with the sealing groove one.

[0019] The present invention is further configured such that the elastomer is made of rubber or silicone.

[0020] The present invention is further configured such that the spring is a conical structure with a smaller top and a larger bottom.

[0021] The present invention is further provided that the upper end surface of the guide rod is provided with a groove for connecting the second spring.

[0022] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0023] The side-annular air intake structure on the cylinder of the brake booster provided by this utility model allows air to enter through channel two into channel one. The air then pushes open the sealing member that is elastically sealed on the outlet of channel one, opening the air intake. The air enters the receiving groove and then enters the inner cavity of the cylinder.

[0024] The intake structure of this application consists of a plug and other components, all of which are installed in the receiving groove of the plug. Thus, when disassembling the intake structure, only the plug needs to be removed from the cylinder block to complete the disassembly of the entire intake structure, facilitating disassembly, assembly, and maintenance.

[0025] It has a pressure cap between the plug and the cylinder block. The air intake sections of the pressure cap and the plug are spaced apart to form an annular air intake chamber. The pressure cap is provided with an air intake pipe extending radially. Gas enters the annular air intake chamber through the air intake pipe and then enters channel one through channel two, thus forming a lateral annular air intake structure. Attached Figure Description

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the air intake structure of this utility model.

[0028] Figure 2 This is an exploded view of the air intake structure of this utility model.

[0029] Figure 3 This is a cross-sectional view of the air intake structure of this utility model.

[0030] Figure 4This is an exploded view of the intake structure and cylinder block of this utility model.

[0031] Figure 5 This is a schematic diagram of the connection between the intake structure and the cylinder block of this utility model.

[0032] Figure 6 This utility model Figure 5 A magnified view of a portion of the image.

[0033] The following are the labels in the attached diagram: 1. Receiving groove; 2. Channel 1; 3. Channel 2; 4. Connecting groove; 5. Snap ring; 6. Sealing element; 7. Spring 1; 81. Connecting section; 82. Inlet section; 83. Operating section; 84. Sealing groove 1; 85. Sealing groove 2; 9. Cylinder body; 91. Column; 92. Mounting groove; 93. Threaded hole; 94. Sealing groove 3; 10. Pressure cap; 11. Inlet pipe; 12. Sealing part; 61. Outer shell; 621. Flanged edge; 62. Groove 1; 63. Groove 2; 64. Through hole; 65. Moving part; 66. Elastic body; 67. Sealing plane; 68. Guide rod; 69. Spring 2. Detailed Implementation

[0034] 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.

[0035] For reference as follows Figure 1-6 The present invention will be described as follows:

[0036] Example: A lateral annular air intake structure on the cylinder of a brake booster includes a plug. The outer wall of the plug is provided with external threads for threaded connection with the inner wall of the air intake hole on the cylinder of the brake booster, thereby fixing the entire air intake structure.

[0037] The lower end face of the plug has a recessed receiving groove 1. This receiving groove provides installation space for other components.

[0038] The plug has a channel 2 along its axial direction that communicates with the receiving groove 1, and the lower end of the channel 2 communicates with the receiving groove 1. The plug has a channel 3 along its radial direction that communicates with the channel 2, and the channel 3 penetrates the radial outer wall of the plug to form the radial outlet of the air intake channel.

[0039] The side wall of the receiving groove 1 is provided with an annular connecting groove 4, and a retaining spring 5 is connected in the connecting groove 4. After the retaining spring 5 is embedded in the connecting groove 4, it forms a circumferential fixing structure, which provides a support point for the lower end of the spring 7.

[0040] It also includes a sealing element 6 and a spring 7, both located within the receiving groove 1. The sealing element 6 is positioned inside the spring 7, with the lower end of the spring 7 abutting against the retaining ring 5 and the upper end of the spring 7 abutting against the sealing element 6. Under the elastic force of the spring 7, the sealing element 6 forms a seal against the channel 2. Under the action of the spring 7, its elastic force pushes the sealing element 6 upward, causing the upper end face of the sealing element 6 to fit tightly against the lower outlet of the channel 2, thus sealing the channel 2 and achieving a one-way sealing function.

[0041] When external air needs to enter the brake booster cylinder, the air enters from the radial channel 2 3 of the plug, flows through channel 2 3 and then merges into the axial channel 1 2. As the amount of air in channel 1 2 increases, the air pressure gradually rises. When the thrust generated by the air pressure is greater than the elastic force of spring 1 7, the air pushes the sealing part 6 downward, spring 1 7 is compressed, and the lower end outlet of channel 1 2 is opened. The air enters the receiving groove 1 through the outlet of channel 1 2, and then flows into the inner cavity of the cylinder from the gap between the receiving groove 1 and the cylinder intake hole, completing the air intake process.

[0042] When the external air pressure decreases or the air pressure inside the cylinder is higher than the air pressure inside channel 2, the elastic force of spring 7 pushes the sealing part 6 to reset upward, re-sealing the outlet of channel 2, preventing air from flowing out of the cylinder in the opposite direction, and realizing the function of one-way air intake.

[0043] The advantages of this structure in terms of disassembly, assembly, and maintenance stem from its integrated design:

[0044] The sealing component 6, spring 7, snap ring 5 and other components are all installed in the receiving groove 1 of the plug. The snap ring 5 and the connecting groove 4 cooperate to form an integral assembly. All internal components are installed or removed synchronously with the plug.

[0045] When maintenance of the intake structure is required, simply rotate the plug to separate its external thread from the internal thread of the cylinder intake hole. This allows the plug and all its internal components, such as the sealing parts 6, spring 7, and snap ring 5, to be removed from the cylinder at once without the need to disassemble each component step by step.

[0046] This design reduces the number of disassembly and assembly steps, avoids the risk of component damage caused by repeated operations, and shortens maintenance time while improving disassembly and assembly efficiency.

[0047] The plug consists of a connecting section 81, an air intake section 82, and an operating section 83 from bottom to top. The outer diameter of the operating section 83 is larger than that of the air intake section 82, and the outer diameter of the air intake section 82 is larger than that of the connecting section 81. This forms a stepped structure. This design not only meets the functional requirements of each section but also achieves installation positioning and sealing through the difference in diameter.

[0048] The connecting section 81 serves as the connection base between the plug and the cylinder 9. Its outer wall is machined with external threads for threaded connection with the threaded hole 93 on the cylinder 9, thereby fixing the plug.

[0049] Channel 2 3 is installed through the outer wall of the intake section 82. It provides a path for gas to enter channel 1 2 from the outside.

[0050] An annular sealing groove 84 is provided on the outer wall of the upper end of the connecting section 81. A sealing ring is installed in the groove to enhance the sealing performance between the connecting section 81 and the threaded hole 93 and prevent gas leakage.

[0051] An annular sealing groove 85 is provided on the outer wall of the upper end of the air intake section 82. A sealing ring is installed in the groove to cooperate with the pressure cover 10 to form a seal and prevent gas from leaking from the gap between the air intake section 82 and the pressure cover 10.

[0052] The operating section 83 serves as the part for disassembling and assembling the plug. Its large outer diameter facilitates the use of tools (such as wrenches) to rotate the plug, thereby achieving threaded connection or disassembly between the plug and the cylinder body 9.

[0053] It also includes cylinder block 9, whose mounting structure is compatible with the plug to ensure stable assembly of the intake structure and gas flow.

[0054] The cylinder body 9 has a protruding column 91 on its side wall. The upper side of the column 91 has a mounting groove 92. The bottom of the mounting groove 92 has a threaded hole 93 that communicates with the inner cavity of the cylinder body 9. The connecting section 81 is connected to the threaded hole 93, and the plug is fixed to the cylinder body 9 through the threaded connection. The air intake section 82 is located in the mounting groove 92. The outer diameter of the air intake section 82 is smaller than the diameter of the mounting groove 92, and a gap space is formed between the two, which provides a basis for the subsequent installation of the pressure cap 10 and the formation of the air intake chamber.

[0055] The upper side wall of the threaded hole 93 is provided with an annular sealing groove 3 94, which corresponds to the sealing groove 1 84 of the connecting section 81. When the plug is tightened, the sealing groove 1 84 and the sealing ring in the sealing groove 3 94 form a sealing effect, further enhancing the sealing effect between the connecting section 81 and the threaded hole 93, and preventing gas from leaking from the threaded connection to the outside of the cylinder body 9.

[0056] An annular pressure cap 10 is connected inside the mounting slot 92. As a key sealing and air intake guiding component, the pressure cap 10's structural design ensures the sealing and stability of the lateral annular air intake.

[0057] After the plug is tightened, the gland 10 is pressed between the bottom of the mounting groove 92 and the operating section 83. The lower end of the gland 10 forms a sealed connection with the mounting groove 92, and the upper end of the gland 10 forms a sealed connection with the operating section 83. This double sealing structure effectively prevents gas from leaking from the gaps between the mounting groove 92 and the gland 10, and between the gland 10 and the operating section 83.

[0058] An air inlet pipe 11 extends radially from the outer side wall of the pressure cap 10, communicating with the inner side of the pressure cap 10 for connecting to an external air source. Radially, the pressure cap 10 and the air inlet section 82 are spaced apart, forming an annular air inlet chamber. This air inlet chamber communicates with the external air source through the air inlet pipe 11 and corresponds to channel 2 3 on the air inlet section 82, ensuring that external gas can smoothly flow into channel 2 3 after entering the annular air inlet chamber through the air inlet pipe 11.

[0059] Intake path: External gas enters the annular intake chamber between the pressure cap 10 and the intake section 82 through the intake pipe 11. Since the intake chamber is annular, the gas can be evenly distributed along the circumference. Subsequently, the gas enters the plug through the second channel 3 on the intake section 82, merges into the first channel 2 through the second channel 3, and then pushes the sealing part 6 to open the first channel 2. Finally, it enters the inner cavity of the cylinder 9 through the receiving groove 1, completing the complete path of "lateral intake → annular cavity buffer → radial channel introduction → axial channel delivery", forming a stable lateral annular intake structure.

[0060] The bottom surface of the receiving groove 1 is provided with a downward protruding, annular sealing part 12, and the channel 2 is located inside the sealing part 12.

[0061] The sealing component 6 includes a cylindrical outer shell 61. The upper edge of the outer shell 61 is provided with a flange 621, the outer diameter of which is smaller than the inner diameter of the receiving groove 1. The upper end of the spring 7 abuts against the flange 621. The spring force is transmitted to the entire outer shell 61 through the flange 621, thereby realizing the reset drive of the sealing component 6.

[0062] The upper side of the outer casing 61 is provided with a recessed groove 62, the bottom of the recessed groove 62 is provided with a recessed groove 63, and the bottom of the groove 63 is provided with a through hole 64 that penetrates the lower side of the outer casing 61.

[0063] The groove 63 is fitted with a movable part 65 that can slide up and down. The movable part 65 is a cylindrical structure with an opening facing downwards. The upper end of the movable part 65 is wrapped with an elastic body 66, which is made of rubber or silicone and has good elasticity and sealing properties.

[0064] The upper side of the elastomer 66 is machined into a planar structure to form a sealing plane 67. This sealing plane 67 is correspondingly set with the annular sealing part 12 on the bottom surface of the receiving groove 1. When the sealing part 6 is in the sealing state, the sealing plane 67 and the sealing part 12 fit tightly together. The deformation of the elastomer 66 compensates for the machining error and enhances the sealing effect of the outlet of channel 2.

[0065] A guide rod 68 is disposed through the through hole 64, with its lower end extending out of the lower side of the outer shell 61 and its upper end extending into the internal cavity of the movable member 65 and slidingly connected to the inner wall of the movable member 65. The upper diameter of the guide rod 68 is larger than the diameter of the through hole 64, forming a limiting structure to prevent the guide rod 68 from completely dislodging from the through hole 64; the lower diameter is equal to the diameter of the through hole 64 to ensure sliding stability. A groove is provided on the upper end surface of the guide rod 68 to position the lower end of the second spring 69. The upper end of the second spring 69 abuts against the top surface of the inner cavity of the movable member 65, providing an upward elastic force to the movable member 65, pushing the sealing plane 67 of the elastic body 66 to always maintain a close fit with the sealing part 12, enhancing the initial sealing effect.

[0066] Spring 7 has a tapered structure that is smaller at the top and larger at the bottom. Compared to springs of equal diameter, its advantages are: first, during compression, the change in elastic force with deformation is more gradual, reducing the impact when the sealing component 6 opens or closes; second, the larger diameter at the bottom provides a larger contact area with the retaining ring 5, resulting in stronger support stability; and third, the smaller diameter at the top allows for more concentrated contact with the flange 62, ensuring effective transmission of elastic force while saving installation space.

[0067] Spring 69 is located between the inner cavity of the movable part 65 and the guide rod 68. Its elastic force acts directly on the movable part 65, causing the movable part 65 to drive the elastic body 66 to always have an upward tendency. When the sealing part 6 is pushed upward by spring 7 to block the channel 2, the elastic force of spring 69 can compensate for the slight wear or deformation of the elastic body 66, ensuring that the sealing plane 67 and the sealing part 12 fit tightly. During the air intake process, when the sealing part 6 moves downward, spring 69 can buffer the contact impact between the movable part 65 and the bottom of the groove 63, protecting the components.

[0068] 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 lateral annular air intake structure on the cylinder block of a brake booster, comprising a plug, wherein the outer side wall of the plug is provided with external threads, characterized in that: The lower end face of the plug is provided with a recessed receiving groove; The plug has a channel 1 along its axial direction that communicates with the receiving groove, and a channel 2 along its radial direction that communicates with the channel 1. The channel 2 is provided through the radial outer wall of the plug. The side wall of the receiving groove is provided with an annular connecting groove, and a retaining spring is connected inside the connecting groove; It also includes a sealing component and a spring. The sealing component is located inside the spring. The lower end of the spring abuts against the snap ring, and the upper end of the spring abuts against the sealing component. Under the action of the elastic force of the spring, the sealing component forms a blockage of the channel.

2. The lateral annular air intake structure on the cylinder of a brake booster according to claim 1, characterized in that: The plug consists of a connecting section, an air intake section, and an operating section from bottom to top. The outer diameter of the operating section is larger than that of the air intake section, and the outer diameter of the air intake section is larger than that of the connecting section. The outer wall of the connecting section is provided with external threads; the second channel is set through the outer wall of the air intake section.

3. The lateral annular air intake structure on the cylinder of a brake booster according to claim 2, characterized in that: The upper outer wall of the connecting section is provided with an annular sealing groove one, and the upper outer wall of the air intake section is provided with an annular sealing groove two. Sealing rings are connected inside sealing groove one and sealing groove two.

4. The lateral annular air intake structure on the cylinder block of a brake booster according to claim 3, characterized in that: It also includes a cylinder body, with a protruding column on the side wall of the cylinder body. The upper side of the column has a mounting groove, and the bottom of the mounting groove has a threaded hole that communicates with the inner cavity of the cylinder body. The connecting section is connected to the threaded hole. The air intake section is located in the mounting groove, and the outer diameter of the air intake section is smaller than the diameter of the mounting groove. An annular pressure cap is connected in the mounting groove. After the plug is tightened, the pressure cap is pressed between the bottom of the mounting groove and the operating section. The lower end of the pressure cap forms a sealed connection with the mounting groove, and the upper end of the pressure cap forms a sealed connection with the operating section. An air intake pipe extends radially from the outer side wall of the pressure cap and communicates with the inner side of the pressure cap. The pressure cap and the air intake section are spaced apart radially from each other.

5. The lateral annular air intake structure on the cylinder block of a brake booster according to claim 4, characterized in that: The bottom surface of the receiving groove is provided with a downwardly protruding, annular sealing part, and the channel is located inside the sealing part.

6. The lateral annular air intake structure on the cylinder block of a brake booster according to claim 4, characterized in that: The sealing component includes a cylindrical outer shell with a flange at the upper edge, and the upper end of a spring abuts against the flange. A recessed groove is provided on the upper side of the outer shell, and a second recessed groove is provided at the bottom of the first groove. A through hole is provided at the bottom of the second groove, penetrating the lower side of the outer shell. A movable component that can slide up and down is adapted and connected within the second groove. The movable component is open downwards, and an elastic body is wrapped around its upper end. The upper side of the elastic body forms a sealing plane that mates with the sealing part. A guide rod is slidably connected within the through hole. The upper end of the guide rod extends into the movable component and is slidably connected to it. The diameter of the upper end of the guide rod is larger than the diameter of the through hole. A second spring is provided on the upper side of the guide rod, with its lower end abutting against the guide rod and its upper end abutting against the movable component.

7. The lateral annular air intake structure on the cylinder block of a brake booster according to claim 4, characterized in that: The upper sidewall of the threaded hole is provided with an annular sealing groove three, which is provided in correspondence with sealing groove one.

8. The lateral annular air intake structure on the cylinder block of a brake booster according to claim 6, characterized in that: The elastomer is made of rubber or silicone.

9. The lateral annular air intake structure on the cylinder block of a brake booster according to claim 1, characterized in that: The spring described is a conical structure that is smaller at the top and larger at the bottom.

10. The lateral annular air intake structure on the cylinder block of a brake booster according to claim 6, characterized in that: The upper end face of the guide rod is provided with a groove for connecting the second spring.

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