Vehicle pneumatic component detection test bench

Abstract

The utility model discloses an automotive pneumatic component detection test bench, and belongs to the field of automobile detection equipment. The device is characterized in that the device comprises an operation cabinet (4) and a test cabinet (5), an external gas source is connected to the operation cabinet (4), the operation cabinet (4) and the test cabinet (5) are connected through a gas circuit, and a fixing mechanism used for fixing a pneumatic component is arranged on the surface of the test cabinet (5); an operation panel (6) is arranged on the upper surface of the operation cabinet (4), and an air outlet connector (18) used for being connected with a pneumatic component and a control switch used for controlling connection and disconnection of a pipeline between the air outlet connector (18) and the pneumatic component are arranged on the operation panel (6). Through the vehicle pneumatic component detection test bench, the performance detection of the brake master cylinder, the brake cylinder and the door cylinder in the vehicle is realized, the fault of the pneumatic component can be found in time, the potential safety hazard is eliminated, and the vehicle pneumatic component detection test bench is especially suitable for the application of bus maintenance factories.

Description

Technical Field

[0001] The invention discloses a vehicle pneumatic component detection test bench, belonging to the field of automobile detection equipment. Background Art

[0002] Different from the hydraulic transmission method of family cars, pneumatically driven components are often used in buses and large vehicles (such as large trucks), such as the master cylinder and brake cylinder in the brake system. For buses, the door opening and closing is also realized by pneumatic means (cylinders), so the working condition of pneumatic components directly affects the driving safety of the vehicle. The pneumatic components used in vehicles are only tested for performance when leaving the factory. Once a failure occurs during use, the general repair shop directly replaces them, which not only causes certain waste, but also has certain safety hazards. At present, it is difficult to test the performance of pneumatic components in vehicles in auto repair shops. Therefore, a technical solution suitable for auto repair shops that can perform performance testing on pneumatic components in large vehicles, especially buses, so as to find the failure of pneumatic components and replace or repair them in time has become an urgent problem to be solved in this field. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and provide a vehicle pneumatic component detection test bench which realizes the detection of the performance of the brake master cylinder, brake slave cylinder and door cylinder in the vehicle, facilitates the timely discovery of faults of pneumatic components, eliminates safety hazards, and is particularly suitable for use in bus maintenance plants.

[0004] The technical solution adopted by the utility model to solve its technical problems is: the vehicle pneumatic component detection test bench is characterized in that it includes an operating cabinet and a test cabinet, an external air source is connected to the operating cabinet, the operating cabinet and the test cabinet are connected through an air path, and a fixing mechanism for fixing the pneumatic components is arranged on the surface of the test cabinet; the upper surface of the operating cabinet is an operating panel, and an air outlet interface for connecting to the pneumatic component and a control switch for controlling the on-off of the pipeline between the air outlet interface and the pneumatic component are arranged at the operating panel.

[0005] Preferably, an air compressor for delivering an external air source is connected to the air tank, and the air outlet interface includes a direct outlet and a pressure-maintaining test outlet. The direct outlet is directly connected to the air tank through a pipeline, and the pressure-maintaining test outlet is connected to the air tank through a valve body.

[0006] Preferably, the gas storage tank is connected to the pressure-maintaining test outlet via a pneumatic shut-off valve and an exhaust valve in sequence, and an air chamber control knob for controlling the on and off of the pneumatic shut-off valve is located on the operating panel.

[0007] Preferably, the air compressor is connected to the air storage tank via a pressure regulating valve and a one-way valve.

[0008] Preferably, the fixing mechanism includes two test screws vertically fixed on the upper surface of the test cabinet, and a cylinder fixing platform and a supporting plate for placing pneumatic components are respectively provided on the two test screws through adjustable nut positions, and a clamping cylinder is fixed on the top of the cylinder fixing platform, and the piston rod of the clamping cylinder extends vertically downward and passes through the cylinder fixing platform.

[0009] Preferably, a thrust sensor is arranged on the surface of the test cabinet, a transparent groove facing the thrust sensor is opened in the middle of the bearing plate, and a signal output end of the thrust sensor is connected to a display controller arranged on the surface of the operation panel.

[0010] Preferably, the gas outlet of the gas storage tank is connected to the clamping cylinder via a pneumatic manual valve, and a control button of the pneumatic manual valve is arranged on the surface of the operation panel.

[0011] Preferably, multiple pressure gauges are also provided on the surface of the operating panel: a system pressure gauge, an input pressure gauge, an outlet pressure gauge and a pressure-maintaining pressure gauge. The system pressure gauge is connected to the air storage tank, the input pressure gauge is connected to the outlet end of the air storage tank, the pressure-maintaining pressure gauge is connected between the exhaust valve and the pressure-maintaining test outlet, and the outlet pressure gauge is connected to the outlet end of the pneumatic component.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] Through this vehicle pneumatic component testing bench, the performance of the brake master cylinder, brake slave cylinder and door cylinder in the vehicle can be tested, which is convenient for timely discovery of pneumatic component failures and eliminates safety hazards. It is especially suitable for application in bus maintenance plants.

[0014] By setting up a thrust sensor, the thrust of the door cylinder can be detected, avoiding the problem of bus doors being unable to open and close sequentially due to insufficient thrust.

[0015] By setting up a pressure-maintaining test outlet, the air tightness of the brake cylinder can be tested.

[0016] By setting up a clamping cylinder, the pneumatic components to be tested can be fixed. When testing the master brake cylinder, the driver's foot braking action can also be simulated to facilitate performance testing of the master brake cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the front view of the test bench for testing automotive pneumatic components.

[0018] Figure 2 for Figure 1 Left view of .

[0019] Figure 3 This is a schematic diagram of the control panel layout of the vehicle pneumatic parts inspection test bench.

[0020] Figure 4 This is a schematic diagram of the gas circuit connection of the vehicle pneumatic component inspection test bench.

[0021] Among them: 1. Clamping cylinder 2. Cylinder fixing table 3. Test screw 4. Operating cabinet 5. Test cabinet 6. Operating panel 7. Clamping frame 8. Load plate 9. Thrust sensor 10. System pressure gauge 11. Input pressure gauge 12. Display controller 13. Outlet pressure gauge 14. Holding pressure gauge 15. Emergency stop switch 16. Clamping switch 17. Air chamber control knob 18. Outlet interface. DETAILED DESCRIPTION

[0022] Figures 1 to 4 It is the best embodiment of the utility model, and the following Figures 1 to 4 The utility model is further described.

[0023] like Figure 1~2 As shown, a vehicle pneumatic component test bench (hereinafter referred to as the test bench) includes an operation cabinet 4 and a test cabinet 5 arranged at intervals, and the height of the operation cabinet 4 is higher than the height of the test cabinet 5. The upper surface of the operation cabinet 4 is an operation panel 6 of the test bench.

[0024] Combination Figure 3 , two rows of upper and lower pressure gauges are arranged at the operation panel 6. A plurality of pressure gauges are arranged in sequence on the upper row of the operation panel 6: a system pressure gauge 10, an input pressure gauge 11, an outlet pressure gauge 13 and a pressure holding pressure gauge 14. A display controller 12 is also arranged between the input pressure gauge 11 and the outlet pressure gauge 13. In the lower row of the operation panel 6, a plurality of outlet ports 18 are arranged side by side, and are connected to the measured element through the outlet ports. An air chamber control knob 17, a clamping switch 16 and an emergency stop switch 15 are arranged in sequence on the side of the outlet port 18.

[0025] A clamping mechanism for fixing the tested component is provided on the upper surface of the test cabinet 5. The clamping mechanism includes two test screws 3 arranged side by side, and the two test screws 3 stand upright on the upper surface of the test cabinet 5. A bearing plate 8 is provided at the lower part of the two test screws 3, and the two test screws 3 pass through the bearing plate 8 at the same time. A nut is provided on the upper and lower surfaces of both ends of the bearing plate 8, respectively, and a total of four nuts on both sides of the bearing plate 8 fix the bearing plate 8 and the test screw 3. A transparent groove is provided in the middle of the bearing plate 8, and a thrust sensor 9 is also provided on the surface of the test cabinet 5. The signal output end of the thrust sensor 9 is connected to the operating cabinet 4 through a wire, and is connected to the display controller 12, and the thrust value is displayed by the digital tube on the surface of the display controller 12.

[0026] A cylinder fixing platform 2 is provided on the upper part of the two test screws 3, and the two test screws 3 pass through the cylinder fixing platform 2 at the same time. A nut is provided on the upper and lower surfaces of both ends of the cylinder fixing platform 2, and the cylinder fixing platform 2 is fixed on the upper part of the two test screws 3 in the same way as the bearing plate 8. A clamping cylinder 1 is fixed on the upper surface of the cylinder fixing platform 2, and the clamping cylinder 1 is fixed vertically, and its piston rod passes through the cylinder fixing platform 2 and extends to the lower part of the cylinder fixing platform 2, and a clamping frame 7 is fixed at the lower end of the piston rod of the clamping cylinder 1.

[0027] like Figure 4 As shown, the gas circuit of the test bench includes an air compressor arranged at the far end, and the output end of the air compressor is connected to the operating cabinet 4 through a pipeline. After being connected to the operating cabinet 4, the output pipeline of the air compressor is connected to the gas tank through a pressure regulating valve and a one-way valve in sequence. The gas tank is located in the cabinet body of the test cabinet 5. The above-mentioned system pressure gauge 10 is directly connected to the gas tank and is used to display the pressure of the gas tank on the operating panel 6.

[0028] A five-way pipe is connected to the air outlet of the gas storage tank, and three of the other four ports of the five-way pipe are directly connected to the back of the operating panel 6 through pipelines, and are connected to three of the air outlet interfaces 18 of the operating panel 6; another port of the other four ports of the five-way pipe is connected to one end of the pneumatic shut-off valve through a pipeline, and the other end of the pneumatic shut-off valve is connected to the last air outlet interface 18 of the operating panel 6 through an exhaust valve. The above-mentioned air chamber control knob 17 is the control knob of the pneumatic shut-off valve. All the air outlet interfaces 18 arranged on the operating panel 6 are realized by aviation joints. The above-mentioned pressure-maintaining pressure gauge 14 is installed between the exhaust valve and the corresponding air outlet interface. The inlet of the above-mentioned air outlet pressure gauge 13 is arranged on the side of the operating cabinet 4, and the measured element is connected to the air outlet pressure gauge 13 when necessary.

[0029] The air outlet end of the air storage tank is also connected to the input end of the pneumatic manual valve, and the output end of the pneumatic manual valve is connected to the above-mentioned clamping cylinder. The clamping switch 16 arranged on the surface of the operation panel 6 is the control button of the pneumatic manual valve. When the clamping switch 16 is pressed or pulled out, the air source between the air storage tank and the clamping cylinder 1 is switched, thereby realizing manual control of the output and reset of the piston rod of the clamping cylinder 1.

[0030] The specific working process and working principle are as follows:

[0031] When testing the door cylinder of a bus, firstly, the distance and height of the cylinder fixing platform 2 and the bearing plate 8 are adjusted by multiple nuts threadedly connected to the two test screws 3, and then the door cylinder to be tested (tested element) is placed on the surface of the bearing plate 8, and the piston rod of the door cylinder is passed through the transparent groove on the surface of the bearing plate 8. The clamping switch 16 on the surface of the control operation panel 6 is controlled to connect the high-pressure gas in the gas tank to the clamping cylinder 1, and the piston rod of the clamping cylinder 1 is output, and the door cylinder is fixed on the surface of the bearing plate 8 through the clamping frame 7.

[0032] The air outlet interface 18 is connected to the door cylinder through a pipeline. After the pipeline is connected, the high-pressure gas in the gas tank is connected to the door cylinder. The piston rod of the door cylinder outputs and squeezes the thrust sensor 9. The value displayed by the display controller 12 is used to judge whether the thrust size of the door cylinder meets the requirements.

[0033] When testing the brake cylinder of a bus, the brake cylinder is fixed on the surface of the bearing plate 8 through the above steps. The outlet interface 18 connected to the pneumatic shut-off valve is connected to the air inlet end of the brake cylinder through a pipeline, and the outlet end of the brake cylinder is connected to the outlet pressure gauge 13 through a pipeline. After the pipeline connecting the outlet interface 18 and the brake cylinder is connected, the high-pressure gas in the air tank is connected to the brake cylinder. After a certain period of time, the air chamber control knob 17 is rotated to activate the pneumatic shut-off valve to cut off the air path between the air tank and the brake cylinder. At this time, the air tightness of the brake cylinder is tested by the pressure-maintaining pressure gauge 14 to judge the state of the brake cylinder.

[0034] When testing the brake master cylinder of a bus, the load plate 8 is removed and the brake master cylinder is placed on the surface of the test cabinet 5. The air outlet interface 18 is connected to the air inlet of the brake master cylinder through a pipeline, and the air outlet of the brake master cylinder is connected to the air outlet pressure gauge 13 through a pipeline. After the pipeline connecting the air outlet interface 18 and the brake master cylinder is connected, the high-pressure gas in the gas storage tank is connected to the brake master cylinder. After a certain period of time, the clamping switch 16 is triggered, and the piston rod of the clamping cylinder 1 is output and contacts the triggering end of the brake master cylinder. At this time, the brake master cylinder is triggered by simulating the action of a human body stepping on the brake pedal through the clamping cylinder 1, and the output pressure of the brake master cylinder is detected through the air outlet pressure gauge 13 to judge the state of the brake master cylinder.

[0035] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A vehicle pneumatic component testing bench, characterized in that: The invention comprises an operating cabinet (4) and a test cabinet (5), wherein an external air source is connected to the operating cabinet (4), the operating cabinet (4) and the test cabinet (5) are connected via an air path, and a fixing mechanism for fixing a pneumatic component is arranged on the surface of the test cabinet (5); the upper surface of the operating cabinet (4) is an operating panel (6), and an air outlet interface (18) for connecting to the pneumatic component and a control switch for controlling the on-off of a pipeline between the air outlet interface (18) and the pneumatic component are arranged on the operating panel (6).

2. The vehicle pneumatic component testing bench according to claim 1, characterized in that: An air compressor for delivering an external air source is connected to the air storage tank, and the air outlet interface (18) includes a direct connection outlet and a pressure-maintaining test outlet. The direct connection outlet is directly connected to the air storage tank via a pipeline, and the pressure-maintaining test outlet is connected to the air storage tank via a valve body.

3. The vehicle pneumatic component testing bench according to claim 2, characterized in that: The gas storage tank is connected to the pressure test outlet through the pneumatic shut-off valve and the exhaust valve in sequence, and the air chamber control knob (17) for controlling the on and off of the pneumatic shut-off valve is located on the operation panel (6).

4. The vehicle pneumatic component testing bench according to claim 2, characterized in that: The air compressor is connected to the air storage tank through a pressure regulating valve and a one-way valve.

5. The vehicle pneumatic component testing bench according to claim 2, characterized in that: The fixing mechanism comprises two test screws (3) fixed vertically on the upper surface of the test cabinet (5), a cylinder fixing platform (2) and a bearing plate (8) for placing pneumatic components are respectively arranged on the two test screws (3) through nuts, and the positions of the cylinder fixing platforms (2) are adjustable. A clamping cylinder (1) is fixed on the top of the cylinder fixing platform (2), and the piston rod of the clamping cylinder (1) extends vertically downward and passes through the cylinder fixing platform (2).

6. The vehicle pneumatic component testing bench according to claim 5, characterized in that: A thrust sensor (9) is arranged on the surface of the test cabinet (5), a through groove facing the thrust sensor (9) is opened in the middle of the bearing plate (8), and a signal output end of the thrust sensor (9) is connected to a display controller (12) arranged on the surface of the operation panel (6).

7. The vehicle pneumatic component testing bench according to claim 5, characterized in that: The gas outlet of the gas storage tank is connected to the clamping cylinder (1) via a pneumatic manual valve, and a control button of the pneumatic manual valve is arranged on the surface of the operation panel (6).

8. The vehicle pneumatic component testing bench according to claim 3 is characterized in that: A plurality of pressure gauges are also provided on the surface of the operation panel (6): a system pressure gauge (10), an input pressure gauge (11), an air outlet pressure gauge (13) and a pressure maintaining pressure gauge (14); the system pressure gauge (10) is connected to the air storage tank, the input pressure gauge (11) is connected to the air outlet end of the air storage tank, the pressure maintaining pressure gauge (14) is connected between the exhaust valve and the pressure maintaining test outlet, and the air outlet pressure gauge (13) is connected to the air outlet end of the pneumatic component.

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