Automobile booster sealing mechanism

Abstract

The utility model belongs to the technical field of booster sealing mechanisms, and particularly relates to an automobile booster sealing mechanism which comprises a booster and a push rod below the booster. A fixed double-layer pipe and a sliding double-layer pipe which are laminated inside and outside are arranged below the booster; a sealing part is arranged inside the sliding double-layer pipe and slides along with the sliding of the push rod; the inner layer of the sliding double-layer pipe is a sliding inner pipe, a piston is fixedly installed at the end of the sliding inner pipe, the sliding double-layer pipe is installed in a cavity between a fixed outer pipe on the inner layer of the fixed double-layer pipe and a fixed inner pipe on the outer layer of the fixed double-layer pipe in a sliding mode, and exhaust holes are formed in the fixed outer pipe. In the trial period of the booster 1, a traditional fixed structure type seal is replaced by a multi-layer mechanical seal, so that frequent compression and deformation are avoided, dynamic seal is achieved, and durability is achieved at the same time.

Description

Technical Field

[0001] This utility model belongs to the technical field of power booster sealing mechanism, and in particular relates to a sealing mechanism for an automotive power booster. Background Technology

[0002] Automotive power steering is a key component in vehicles used to assist drivers in controlling the vehicle. It amplifies the driver's operating force through mechanical or electronic devices, reduces the intensity of operation, and improves driving safety. The sealing of automotive power steering is the core guarantee for its normal operation. Different types of power steering rely on sealing structures to maintain functional stability.

[0003] Currently, existing power boosters use bellows to seal the outside of the push rod. However, the bellows undergoes frequent compression deformation when the push rod slides, which can lead to cracks and air leaks.

[0004] To address the aforementioned problems, this application proposes a sealing mechanism for automotive power boosters. Utility Model Content

[0005] The purpose of this invention is to provide a sealing mechanism for an automotive power booster, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is a sealing mechanism for an automotive power booster, including the power booster and the push rod below it;

[0008] The booster is provided with an inner and outer stacked fixed double-layer tube and a sliding double-layer tube below it. The sliding double-layer tube is provided with a sealing part inside, which slides with the push rod.

[0009] The inner layer of the sliding double-layer tube is a sliding inner tube, and a piston is fixedly installed at its end. It is slidably installed in the cavity between the fixed outer tube of the inner layer of the fixed double-layer tube and the fixed inner tube of the outer layer. The fixed outer tube has an exhaust hole inside.

[0010] Furthermore, the outer layer of the sliding double-layer tube is a sliding outer tube, and a cavity is formed between the sliding outer tube and the sliding inner tube.

[0011] Furthermore, the fixed outer tube is slidably connected to the cavity between the sliding outer tube and the sliding inner tube.

[0012] Furthermore, the two ends of the sealing part are respectively connected to the upper inner wall of the sliding outer tube and the lower surface of the piston.

[0013] Furthermore, the sealing part is defined as a U-shaped structure, with its lower end connected to the bottom wall inside the sliding double-layer tube.

[0014] Furthermore, the upper end of the sliding outer tube is provided with an oblique through-hole with an inner higher and outer lower diameter.

[0015] Furthermore, a one-way sealing gasket is fixedly connected to the outer side of the fixed outer tube to seal the exhaust hole.

[0016] This utility model has the following beneficial effects:

[0017] This invention utilizes a fixed double-layer tube and a sliding double-layer tube stacked together to ensure that the sealing part remains straight and slides with the push rod as it slides. This creates a dynamic barrier and avoids frequent compression deformation, thus achieving a durable sealing effect.

[0018] When the push rod slides, this invention drives the piston to expel the remaining air through the exhaust port, and at the same time, the guide hole guides the air in the sliding direction outward, thereby further enhancing the sealing effect and effectively preventing air leakage caused by air entering.

[0019] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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.

[0021] Figure 1 This is a schematic diagram of the overall appearance structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of the fixed double-layer tube and the sliding double-layer tube of this utility model.

[0023] Figure 3 This is a schematic diagram of the plane and a partial enlarged structure of the connection part between the fixed double-layer tube and the sliding double-layer tube of this utility model.

[0024] Figure 4 This is a partially enlarged structural diagram of part A of this utility model;

[0025] The attached diagram lists the components represented by each number as follows:

[0026] In the picture:

[0027] 1. Booster; 2. Push rod; 3. Fixed double-layer tube; 4. Sliding double-layer tube;

[0028] 310. Fixed outer tube; 311. Vent hole; 312. One-way sealing gasket; 320. Fixed inner tube;

[0029] 410. Sliding outer tube; 411. Guide hole; 420. Sliding inner tube; 421. Piston; 430. Sealing part. Detailed Implementation

[0030] 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.

[0031] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Please see Figure 1-4 As shown, this utility model is a sealing mechanism for an automotive power booster, including a power booster 1 and a push rod 2 below it;

[0033] Below the booster 1 are an inner and outer stacked fixed double-layer tube 3 and a sliding double-layer tube 4. The sliding double-layer tube 4 is provided with a sealing part 430 inside, which slides with the push rod 2. During the sliding, the intersection area of ​​the fixed double-layer tube 3 and the sliding double-layer tube 4 is sealed in real time to avoid wear such as compression deformation.

[0034] The inner layer of the sliding double-layer tube 4 is a sliding inner tube 420, and a piston 421 is fixedly installed at its end. The cavity between the fixed outer tube 310 of the inner layer of the fixed double-layer tube 3 and the fixed inner tube 320 of the outer layer is slidably installed. The fixed outer tube 310 has an exhaust hole 311 inside. When the push rod 2 is pushed forward, the piston 421 causes the air in the cavity to be discharged outward. The inner and outer sides of the piston 421 are multi-layer sealing protrusions.

[0035] Preferably, the outer layer of the sliding double-layer tube 4 is a sliding outer tube 410, and a cavity is formed between the sliding outer tube 410 and the sliding inner tube 420, which intersects with the cavity inside the fixed double-layer tube 3 in a staggered manner.

[0036] Preferably, the fixed outer tube 310 is slidably connected to the cavity between the sliding outer tube 410 and the sliding inner tube 420, and a mechanical seal is formed by the mutually stacked fixed double-layer tube 3 and sliding double-layer tube 4, which replaces the transmission bellows fixed structure seal.

[0037] Preferably, the two ends of the sealing part 430 are respectively connected to the upper inner wall of the sliding outer tube 410 and the lower surface of the piston 421. The sealing part 430 is defined as a U-shaped structure, with its lower end connected to the bottom wall inside the sliding double-layer tube 4. The sealing part 430 is made of rubber, and its outer ring body is located between the fixed outer tube 310 and the sliding outer tube 410.

[0038] Preferably, the upper end of the sliding outer tube 410 has an inclined through-hole 411 with an inner high and outer low. When pushed upward, the air entering will be guided by the through-hole 411 and discharged outward, which not only enhances the sealing performance but also reduces the pushing resistance.

[0039] Preferably, a one-way sealing gasket 312 is fixedly connected to the outside of the fixed outer tube 310, which blocks the exhaust hole 311. When the internal gas is discharged outward, it will expand outward to form an opening in the central area.

[0040] Preferably, the lower outer side of the fixed inner tube 320 extends outward, and a secondary sealing gasket is installed on its outer side.

[0041] It is understandable that this utility model can replace the traditional fixed structure seal with a multi-layer mechanical seal during the trial period of the booster 1, thereby avoiding frequent compression and deformation, achieving dynamic sealing while being durable.

[0042] A specific application of the operation process of this embodiment is as follows: In use, the sliding of the push rod 2 first drives the sliding double-layer tube 4 to slide. At this time, the sliding inner tube 420 slides in the cavity between the fixed outer tube 310 and the fixed inner tube 320, and the gas in the cavity is squeezed by the piston 421, and finally discharged outward through the exhaust hole 311 and the one-way sealing gasket 312. At the same time, when the push rod is pushed forward, the guide hole 411 will first guide the air in the path outward, reducing the amount of air entering between the sliding outer tube 410 and the sliding inner tube 420. In addition, when the push rod 2 is pushed forward, it will also drive the sealing part 430 between 41 and the sliding inner tube 420 to move simultaneously, thereby forming a dynamic seal and avoiding deformation such as bending and compression.

[0043] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A sealing mechanism for an automotive power booster, characterized in that: Includes the booster (1) and the push rod (2) below it; The booster (1) is provided with an inner and outer stacked fixed double tube (3) and a sliding double tube (4) below it. The sliding double tube (4) is provided with a sealing part (430) inside, which slides with the push rod (2). The inner layer of the sliding double-layer tube (4) is a sliding inner tube (420), and a piston (421) is fixedly installed at its end. The cavity between the fixed outer tube (310) of the inner layer of the fixed double-layer tube (3) and the fixed inner tube (320) of the outer layer is slidably installed. An exhaust hole (311) is opened inside the fixed outer tube (310).

2. The automotive power steering sealing mechanism according to claim 1, characterized in that: The outer layer of the sliding double-layer tube (4) is a sliding outer tube (410), and a cavity is formed between the sliding outer tube (410) and the sliding inner tube (420).

3. The automotive power steering sealing mechanism according to claim 2, characterized in that: The fixed outer tube (310) is slidably connected to the cavity between the sliding outer tube (410) and the sliding inner tube (420).

4. The automotive power steering sealing mechanism according to claim 2, characterized in that: The two ends of the sealing part (430) are respectively connected to the upper inner wall of the sliding outer tube (410) and the lower surface of the piston (421).

5. The automotive power steering sealing mechanism according to claim 4, characterized in that: The sealing part (430) is defined as a U-shaped structure, with its lower end connected to the bottom wall inside the sliding double-layer tube (4).

6. The automotive power steering sealing mechanism according to claim 2, characterized in that: The upper end of the sliding outer tube (410) is provided with an oblique through-hole (411) with an inner height and an outer bottom.

7. The automotive power steering sealing mechanism according to claim 1, characterized in that: The outer side of the fixed outer tube (310) is fixedly connected with a one-way sealing gasket (312) to seal the vent hole (311).

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