Airtightness test bench for brake hoses

Abstract

The utility model discloses a kind of brake hose air-tightness test bench, it is related to automobile parts detection equipment technical field, including test bench rack, and fixed assembly, gas supply assembly and air-tightness detection assembly installed on it, fixed assembly includes the rotary table that is rotatably connected on rack by pivot, rotary table is fixed with cross rail, two symmetrical sliding blocks are slidably connected on cross rail, two sliding blocks are connected by spring and are provided with clamping plate, gas supply assembly is communicated with air-tightness detection assembly by pipeline, and leakage detection module is integrated in detection assembly.The utility model is equipped with the fixed assembly of rotating function and spring self-centering clamping mechanism, can self-adapting adjustment clamping spacing and angle, solve the problem that existing technology forcedly clamps and leads to hose stress distortion, low detection precision, realize the efficient, nondestructive and high-precision air-tightness automatic detection of brake hose.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive parts testing equipment, and in particular to a brake hose airtightness testing bench. Background Technology

[0002] Brake hoses are crucial safety components in automotive braking systems, primarily functioning to transmit the pressure of the braking medium and ensure effective braking force. To guarantee driving safety, brake hoses must undergo rigorous airtightness testing before leaving the factory to ensure they are leak-free under high-pressure conditions. Therefore, the ease of setup, adaptability, and accuracy of the test results from an airtightness testing bench directly impact production efficiency and product quality.

[0003] However, existing brake hose airtightness testing benches still have some significant structural defects in practical applications. Most current testing benches use a fixed clamp structure, meaning the distance and angle between the two clamping ends are often preset and difficult to adjust quickly. This rigid fixing method is inadequate when dealing with brake hoses of different lengths or irregularly shaped hoses with specific natural bending angles. Operators often need to forcibly twist or stretch the hose to install it correctly. This forced assembly is not only time-consuming and labor-intensive, but more importantly, it generates unexpected additional stress inside the hose, and may even cause minor damage to the joints, leading to seal failure or misjudgment during the testing process, seriously affecting the authenticity and reliability of the test results.

[0004] Therefore, this utility model proposes a brake hose airtightness test bench to overcome the shortcomings of the prior art. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a brake hose air tightness test bench, which aims to improve the problems of poor adaptability of the clamping mechanism and incompatibility with hoses of various lengths and bending angles in the existing brake hose air tightness test bench, which leads to stress damage caused by forced installation and affects the test accuracy.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a brake hose air tightness test bench, comprising: a test bench frame;

[0007] The upper surface of the test bench frame is equipped with fixing components;

[0008] The fixing component includes a rotating shaft, which is rotatably connected to the mounting slot of the test bench frame. A turntable is fixedly connected to the upper end of the rotating shaft, and a horizontal rail is fixedly connected to the top of the turntable. Two symmetrically arranged sliders are slidably connected to the surface of the horizontal rail. Connecting parts are fixedly provided on the top surfaces of the two sliders respectively. A spring is tensioned between the two connecting parts. Clamping plates are fixedly connected to the opposite inner end faces of the two sliders respectively.

[0009] The test bench frame is also equipped with an air supply component and an air tightness detection component. The output end of the air supply component and the input end of the air tightness detection component are connected through a pipeline.

[0010] Preferably, a limiting plate is fixedly provided at the center of the upper surface of the horizontal rail. The limiting plate is located between the two sliders, and the width of the limiting plate is less than or equal to the minimum distance when the two sliders are fully closed, so as to mechanically limit the reset stroke of the sliders.

[0011] Preferably, the inner side of the clamping plate is provided with a semi-circular or arc-shaped groove, and the inner wall of the groove is bonded with a rubber anti-slip pad. The groove is used to adapt to the outer contour of the brake hose connector to enhance clamping stability and protect the surface of the fitting.

[0012] Preferably, the air supply assembly includes an air supply platform fixedly installed on the surface of the test bench frame, a pressure regulating valve is installed on the upper surface of the air supply platform, an air supply pipeline is connected to the output port of the air supply platform, and the end of the air supply pipeline away from the air supply platform extends to the airtightness detection assembly.

[0013] Preferably, the airtightness detection component includes an air source pipe and an air source interface. One end of the air source pipe is connected to the air source supply pipeline, and the other end of the air source pipe is connected to the air source interface. A leak detection module is connected in series on the air source pipe for real-time monitoring of the airtightness status of the pipeline.

[0014] Preferably, a control panel is fixedly installed on one side of the upper surface of the test bench frame. The control panel is electrically connected to the airtightness testing component and is used to display test data and set control parameters.

[0015] Preferably, the upper surface of the test bench frame is provided with a groove, the fixing component is installed on the bottom plane of the groove, and the air supply component is installed on the raised step surface of the test bench frame located on the rear side of the groove, so as to achieve a reasonable layered layout of each component.

[0016] Preferably, the connector is a hexagonal stud or column structure, and the two ends of the spring are hooked onto the side walls of the two connectors respectively.

[0017] This utility model has the following beneficial effects:

[0018] 1. In this utility model, by setting a fixing component with a turntable, a rotating shaft and a spring-driven slider, the problem of the single fixing method of brake hose in the prior art, which cannot adapt to hoses of different lengths and natural bending angles, and is prone to causing internal stress or even damage to the hose by forced installation is solved. The invention achieves the effect of adaptively adjusting the clamping distance and clamping angle, effectively eliminating assembly stress, ensuring high-precision clamping of the hose in its natural state, thereby improving the accuracy of detection.

[0019] 2. This utility model, by integrating an air tightness testing component with an air source pipe, an air source interface, and a leak detection module, and in conjunction with a control panel that can display and control parameters in real time, solves the problems of cumbersome operation, low testing efficiency, over-reliance on experience judgment, and lack of data recording in traditional manual testing methods. It achieves automated monitoring of the brake hose air tightness testing process, real-time pressure feedback, and digital visualization of test results, significantly improving testing efficiency and data reliability. Attached Figure Description

[0020] Figure 1 This is a perspective view of a brake hose airtightness test bench proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the test bench frame for a brake hose airtightness test bench proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the fixing components of a brake hose airtightness test bench proposed in this utility model;

[0023] Figure 4 This is a schematic diagram of the clamping plate of a brake hose airtightness test bench proposed in this utility model.

[0024] Legend:

[0025] 1. Test bench frame; 2. Fixing components; 201. Horizontal rail; 202. Slider; 203. Connector; 204. Spring; 205. Turntable; 206. Rotating shaft; 207. Limiting plate; 208. Clamping plate; 3. Air supply components; 301. Air supply platform; 302. Pressure regulating valve; 303. Air supply pipeline; 4. Air tightness testing components; 401. Air supply connection pipe; 402. Air supply interface; 403. Leakage detection module; 5. Control panel. Detailed Implementation

[0026] 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.

[0027] Reference Figures 1-4 This utility model provides a brake hose air tightness test bench, which aims to solve the structural defects in the prior art, such as poor brake hose clamping adaptability, difficulty in compatibility with pipes of different lengths and bending angles, and low efficiency and insufficient accuracy of manual air tightness testing.

[0028] The brake hose air tightness test bench consists of a test bench frame 1, which serves as the main support foundation, and a fixing component 2, an air supply component 3, and an air tightness testing component 4, all installed in specific areas on the upper surface of the test bench frame 1. The test bench frame 1 provides a stable mounting base and bearing platform for the entire device, supporting the various functional components and resisting vibrations and stresses generated during the test. To achieve stable clamping and adaptive adjustment of the brake hose, a groove is provided on the upper surface of the test bench frame 1. The bottom plane of the groove provides a flat installation surface. The fixing component 2 is arranged on the bottom plane of the groove, and two sets of fixing components 2 are symmetrically arranged in the groove along the left and right directions to clamp the two ends of the brake hose. At the same time, a raised step surface is integrally formed or fixedly provided on the rear side of the test bench frame 1, and the air supply component 3 is fastened to the raised step surface. This stepped spatial layout not only optimizes the pipeline routing path but also realizes the spatial layering of the air system and the mechanical clamping system, facilitating maintenance and observation by operators.

[0029] A rotating shaft 206 is vertically installed at the bottom center of the fixed component 2. The rotating shaft 206 is rotatably connected to the mounting groove at the bottom of the groove of the test bench frame 1. The rotating shaft 206 can rotate freely around the vertical axis through bearings or bushings. The top of the rotating shaft 206 is fixedly connected to a turntable 205 by key connection or welding. The turntable 205 rotates synchronously with the rotating shaft 206. A horizontal rail 201 extending in the horizontal direction is fastened to the top plane of the turntable 205 by bolts. The horizontal rail 201 serves as a linear guide reference. Its surface is smooth and has high precision. Two symmetrically arranged sliders 202 are slidably connected to the surface of the horizontal rail 201. The two sliders 202 are distributed with the center line of the horizontal rail 201 as the axis of symmetry. The bottom of the sliders 202 is provided with a groove that matches the cross-sectional shape of the horizontal rail 201, so that the sliders 202 can perform low-friction reciprocating linear motion along the length of the horizontal rail 201.

[0030] To achieve automatic clamping of the brake hose connector by the slider 202 and maintain a constant clamping force, the top surfaces of the two sliders 202 are respectively fixed with connectors 203 by threaded connection or integral casting. These connectors 203 preferably adopt a hexagonal stud or column structure extending vertically upwards, providing a fulcrum for the installation of the elastic element. A spring 204 is tensioned between the two connectors 203. This spring 204 is a tension spring, with its two ends hooked onto or fixed to the side walls of the two connectors 203 by pins. In its natural state, the spring 204 is in a contraction tendency, and the resulting tension is transmitted to the slider 202 through the connectors 203, driving the brake hose connector. Two sliders 202 move towards the center along the horizontal rail 201. At the same time, clamps 208 are fixedly connected to the opposite inner end faces of the two sliders 202. As the actuators that directly contact the brake hose connector, the clamps 208 move synchronously with the sliders 202. When the operator overcomes the tension of the spring 204 and pushes the two clamps 208 outward to insert the hose connector, and then releases his hand, the two clamps 208 will automatically clamp the hose connector inward under the rebound force of the spring 204. Since the entire fixing component 2 can be rotated through the pivot 206, when the hose has a tortuous angle, the horizontal rail 201 will automatically deflect to adapt to the angle of the hose's natural bending, thus avoiding damage to the hose.

[0031] As a preferred embodiment, in order to prevent the two sliders 202 from violently colliding and causing damage to the parts due to excessive rebound of the spring 204 under no-load conditions, a limit plate 207 is fixedly installed at the center of the upper surface of the horizontal rail 201 by screws. The limit plate 207 is located between the two sliders 202, and the width of the limit plate 207 is designed to be less than or equal to the minimum distance when the two sliders 202 are fully closed. In this way, without affecting the normal clamping function, it provides a mechanical limit for the reset stroke of the sliders 202 and ensures the safe operation of the mechanism.

[0032] As another preferred embodiment, in order to enhance the friction between the clamping plate 208 and the brake hose connector and prevent metal-to-metal contact damage to the hose surface, the inner side of the clamping plate 208 is milled to form a semi-circular or arc-shaped groove. The geometry of the groove is adapted to the cylindrical outer contour of the brake hose connector. A layer of rubber anti-slip pad is bonded to the inner wall of the groove with strong adhesive. The rubber anti-slip pad has a certain elastic deformation capability, which can not only increase the static friction coefficient to prevent the hose from falling off under high pressure during testing, but also provide a slight interference fit when clamped to protect the coating on the connector surface.

[0033] Regarding the specific construction of the air circuit system, the air supply component 3 includes an air supply platform 301 fixedly installed on the surface of the raised step of the test bench frame 1. The air supply platform 301 serves as the mounting plate for air circuit integration, and a high-precision pressure regulating valve 302 is installed on its upper surface. The pressure regulating valve 302 is used to stabilize and regulate the input compressed air to ensure that the output pressure meets the test standards. The output port of the air supply platform 301 is connected to a flexible air supply pipe 303 through a sealed joint. The air supply pipe 303 has sufficient length and flexibility, and its end away from the air supply platform 301 extends and connects to the airtightness detection component 4.

[0034] To achieve accurate leak detection, the airtightness detection component 4 includes an air source pipe 401 and an air source interface 402. The air source pipe 401 serves as an intermediate connecting pipe, with one end connected to the air source supply pipe 303 and the other end connected to the air source interface 402 via a threaded seal. The port shape of the air source interface 402 is designed as a quick-plug structure that matches the end interface of the brake hose, so as to facilitate rapid air circuit connection. More importantly, a leak detection module 403 is integrated in series along the pipeline path of the air source pipe 401. The leak detection module 403 integrates a high-sensitivity pressure sensor or flow sensor, which can capture minute pressure fluctuations or gas flow changes in the pipeline in real time and convert physical signals into electrical signals.

[0035] To achieve visualized monitoring and parameterized control of the test process, a control panel 5 is bolted to the right side of the upper surface of the test bench frame 1. The control panel 5 integrates a microprocessor and a display screen. The control panel 5 is electrically connected to the leakage detection module 403 in the airtightness detection component 4 through a wiring harness. It can receive and process sensor data in real time and intuitively display the current pressure curve and leakage value on the display screen. Operators can also set test parameters such as pressure holding time and target pressure through the control panel 5, thereby constructing a complete closed-loop detection system.

[0036] Working principle: Using the test bench frame 1 as the supporting foundation, air is supplied through the fixing component 2 and the air supply component 3 to achieve stable clamping and test preparation of the brake hose. Unlike the limitations of traditional fixing methods, the test bench frame 1 provides stable support for the entire equipment. The horizontal rail 201 of the fixing component 2 provides a sliding guide for the slider 202. The slider 202 is linked to the clamping plate 208 through the connector 203, allowing it to move along the horizontal rail 201 to adapt to brake hoses of different lengths. The spring 204 is sleeved on the outside of the connector 203, lifting... The device provides elastic clamping force, which, in conjunction with the limiting plate 207, restricts the displacement of the clamping plate 208, ensuring a tight fit between both ends of the hose. The turntable 205 can be rotated and adjusted via the rotating shaft 206 to accommodate hose clamping requirements with different bending angles. Simultaneously, the air supply unit 3's air supply platform 301 outputs gas, which, after pressure regulation by the pressure regulating valve 302, is delivered to the airtightness testing unit 4 via the air supply pipeline 303. Compared to the problem of large pressure fluctuations in traditional air supply, this device offers higher air supply accuracy, laying the foundation for airtightness testing.

[0037] The airtightness testing component 4 and control panel 5 enable accurate testing of brake hose airtightness, solving the problems of low efficiency and poor accuracy in traditional testing. The brake hose is sealed at both ends to the air source interface 402 of the airtightness testing component 4, and the air source connector 401 is connected to the air supply pipeline 303, allowing gas at a set pressure to be introduced into the hose. The leakage detection module 403 monitors the pressure changes and gas leakage in the hose in real time, and the data is synchronously transmitted to the control panel 5. Operators can set parameters such as test pressure and holding time through the control panel 5 and visually view the test results. Compared to traditional manual testing, which relies on experience and has large errors, this device achieves higher testing accuracy and more convenient operation through automated monitoring and data display. Combined with the stable clamping of the fixing component 2, it avoids testing errors caused by poor clamping seals, improving the efficiency and reliability of brake hose airtightness testing and meeting the stringent testing requirements of automotive braking system components.

Claims

1. A brake hose airtightness testing bench, comprising: Test bench frame (1); The characteristic feature is that a fixing component (2) is installed on the upper surface of the test bench frame (1); The fixing component (2) includes a rotating shaft (206), which is rotatably connected to the mounting groove of the test bench frame (1). A turntable (205) is fixedly connected to the upper end of the rotating shaft (206). A horizontal rail (201) is fixedly connected to the top of the turntable (205). Two symmetrically arranged sliders (202) are slidably connected to the surface of the horizontal rail (201). Connecting parts (203) are fixedly provided on the top surfaces of the two sliders (202). A spring (204) is tensioned between the two connecting parts (203). Clamping plates (208) are fixedly connected to the opposite inner end faces of the two sliders (202). The test bench frame (1) is also equipped with an air supply component (3) and an air tightness detection component (4). The output end of the air supply component (3) and the input end of the air tightness detection component (4) are connected through a pipeline.

2. The brake hose airtightness test bench according to claim 1, characterized in that, A limiting plate (207) is fixedly installed at the center of the upper surface of the horizontal rail (201). The limiting plate (207) is located between the two sliders (202), and the width of the limiting plate (207) is less than or equal to the minimum distance when the two sliders (202) are fully closed.

3. The brake hose airtightness test bench according to claim 1, characterized in that, The inner side of the clamp (208) is provided with a semi-circular or arc-shaped slot, and the inner wall of the slot is bonded with a rubber anti-slip pad. The slot is used to fit the outer contour of the brake hose connector.

4. The brake hose airtightness test bench according to claim 1, characterized in that, The gas supply assembly (3) includes a gas supply platform (301) fixedly installed on the surface of the test bench frame (1). A pressure regulating valve (302) is installed on the upper surface of the gas supply platform (301). The output port of the gas supply platform (301) is connected to a gas supply pipe (303). The end of the gas supply pipe (303) away from the gas supply platform (301) extends to the airtightness detection assembly (4).

5. The brake hose airtightness test bench according to claim 4, characterized in that, The airtightness detection component (4) includes an air source pipe (401) and an air source interface (402). One end of the air source pipe (401) is connected to the air source supply pipeline (303), and the other end of the air source pipe (401) is connected to the air source interface (402). A leak detection module (403) is connected in series on the pipeline of the air source pipe (401).

6. The brake hose airtightness test bench according to claim 1, characterized in that, A control panel (5) is fixedly installed on one side of the upper surface of the test bench frame (1), and the control panel (5) is electrically connected to the airtightness testing component (4).

7. The brake hose airtightness test bench according to claim 1, characterized in that, The upper surface of the test bench frame (1) is provided with a groove, the fixing component (2) is installed on the bottom plane of the groove, and the air supply component (3) is installed on the raised step surface of the test bench frame (1) located behind the groove.

8. The brake hose airtightness test bench according to claim 1, characterized in that, The connector (203) is a hexagonal stud or column structure, and the two ends of the spring (204) are hooked onto the side walls of the two connectors (203).

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