A test device and method for measuring the stability index of a vehicle during driving

Abstract

The present invention discloses a testing device and method for measuring the stability index of a car during driving, comprising a testing cylinder, a boss seat is provided in the middle of the testing cylinder, a testing ball recess seat is provided in the middle of the top surface of the boss seat, a gasket is also provided at the testing ball recess seat, a negative pressure cavity is connected to the lower part of the testing ball recess seat, a pressure regulating self-locking device is provided at the lower part of the negative pressure cavity, the pressure regulating self-locking device is provided with a cavity, the cavity is connected to the negative pressure cavity, and a piston cavity is provided on the left side, and an air extraction pipe is connected to the right side; a piston rod and a piston spring are distributed in the piston cavity, and a breathing hole is also provided at the left end of the piston cavity; one end of the piston rod is also connected to a movable guide rod, a conical sealing plug is provided at the left end of the movable guide rod, and a sliding air-permeable ring is provided at the right end of the movable guide rod, and the sliding air-permeable ring can be movably distributed in the inner cavity of the air extraction pipe. The present invention and method can quickly and accurately test the stability index of a car during driving, and the use effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of automobile testing and detection, and in particular to a testing device and method for measuring a stability index of an automobile during driving. Background Art

[0002] When a car is driving on the road, due to the impact of uneven road surface (such as steps, potholes), the driver, passengers and unfastened items on the vehicle and the engine will be thrown upward at a certain speed, and the performance of the car's shock absorbing device or the car's shock absorbing performance at this time will come into play. However, the relevant shock absorbing effect needs to be scientifically tested, and then relevant optimization design should be carried out as needed to minimize the impact of uneven road surface.

[0003] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the present invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a testing device and method for measuring the stability index of a car during driving, which has the advantages of convenient detection operation, accurate measurement and good repeatability.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A test device for measuring the stability index of a car during driving, comprising a test cylinder, a boss seat is provided in the middle part of the test cylinder, a test ball recess seat is provided in the middle part of the top surface of the boss seat, a gasket is also provided at the test ball recess seat, a negative pressure chamber is connected to the lower part of the test ball recess seat, a pressure regulating self-locking device is provided at the lower part of the negative pressure chamber, the pressure regulating self-locking device is provided with a cavity, the cavity is connected to the negative pressure chamber, and a piston chamber is provided on the left side, and an exhaust pipe is connected to the right side; a piston rod and a piston spring are distributed in the piston chamber, and a breathing hole is also provided at the left end of the piston chamber; a movable guide rod is also connected to one end of the piston rod, a conical sealing plug is provided at the left end of the movable guide rod, and a sliding air-permeable ring is provided at the right end of the movable guide rod, and the sliding air-permeable ring can be movably distributed in the inner cavity of the exhaust pipe; a test ball is also included, and the test balls are correspondingly distributed on the test ball recess seat.

[0007] Furthermore, a plurality of the test cylinders are provided; the right end of the air extraction pipe is also connected to an air extraction main pipe, and a plurality of test cylinders are distributed in a row and are all connected to the air extraction main pipe; the end of the air extraction main pipe is connected to a control valve connecting pipe, on which a first electric-controlled valve is provided, and the control valve connecting pipe is also connected to an air return pipe, on which a second electric-controlled valve is distributed, and the air return pipe is distributed between the first electric-controlled valve and the air extraction main pipe.

[0008] The method for testing using the above-mentioned testing device for measuring the stability index of a vehicle during driving comprises the following steps:

[0009] (1) Install the device on the vehicle, connect one end of the control valve connecting pipe to the suction pipe of the suction pump, and turn on the suction pump;

[0010] (2) Then place the test ball on the test ball recess seat;

[0011] (3) When the car is about to reach the obstacle, the first electrically controlled valve is opened, the negative pressure chamber is under negative pressure, the piston is compressed by the atmospheric pressure, and then the piston spring contracts, the piston rod moves to the right until the conical sealing plug blocks the air extraction pipe, and the negative pressure chamber automatically stops exhausting. Based on the different elastic coefficients of the piston spring, the negative pressure values ​​of the negative pressure chambers of the several test cylinders are different, so that negative pressure values ​​with different gradients are obtained for testing;

[0012] (4) The first electrically controlled valve is manually controlled to close by pressing the switch; after a test, some test balls are ejected, the negative pressure chamber is back-pressurized, and then the second electrically controlled valve is controlled to open, the inner cavity of the exhaust pipe is back-pressurized, and the piston is reset by the piston spring, and then the next test is repeated.

[0013] The beneficial effects of the present invention compared with the prior art are as follows: when performing a vehicle stability test, it is necessary to quickly and synchronously control multiple test cylinders. The present invention only needs to be connected to the same vacuum pump to achieve synchronous and timely control of different negative pressure values ​​of multiple test cylinders; by checking which test ball is ejected from the test ball recess after the vehicle passes an obstacle, the relevant test indicators of the vehicle can be known; the present invention has the advantages of reliable detection data and good use effect, and it is very convenient to perform repeated test operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a side view of the present invention;

[0015] Figure 2 is a side view of the present invention after the test ball is distributed;

[0016] Figure 3 It is a cutaway view of the sliding breathable ring of the present invention. DETAILED DESCRIPTION

[0017] like Figures 1 to 3As shown, the present invention is provided with a plurality of test cylinders 1 and a plurality of test balls 21; the test balls can be made of a double-layer structure material, and the mass of the plurality of test balls 21 should be consistent, and light or heavy mass can be selected, and then the outer layer material used is preferably a rubber material to ensure the proper sealing degree and prevent air leakage between the test ball recess seat 2-1. A boss seat 2 is provided in the middle of the test cylinder 1, and a test ball recess seat 2-1 is provided in the middle of the top surface of the boss seat 2. A gasket 19 is also provided at the test ball recess seat 2-1. The lower part of the test ball recess seat 2-1 is connected to a negative pressure chamber 3, and a pressure regulating self-locking device 4 is provided at the lower part of the negative pressure chamber 3. The pressure regulating self-locking device 4 is provided with a cavity, and its cavity is connected to the negative pressure chamber 3, and a piston chamber 4-1 is provided on its left side, and an exhaust pipe 12 is connected on its right side; a piston rod 8 and a piston spring 6 are distributed in the piston chamber 4-1, and a breathing hole 5 is also provided at the left end of the piston chamber 4-1; one end of the piston rod 8 is also connected to a movable guide rod 10, The left end of the movable guide rod 10 is provided with a conical sealing plug 9, and the right end of the movable guide rod 10 is provided with a sliding air-permeable ring 20, which can be movably distributed in the inner cavity 13 of the exhaust pipe 12; the right end of the exhaust pipe 12 is connected to the exhaust main pipe 14, and a plurality of test tubes 1 are arranged in a row and connected to the exhaust main pipe 14; the end of the exhaust main pipe 14 is connected to a control valve connecting pipe 15, on which a first electric control valve 16 is arranged, and the control valve connecting pipe 15 is also connected to a return pipe 17, on which a second electric control valve 18 is arranged, and the return pipe 17 is arranged between the first electric control valve 16 and the exhaust main pipe 14. The elastic coefficient of the piston spring 6 is selected and determined according to the needs, and the size of the elastic coefficient directly determines the negative pressure value of the negative pressure chamber 3, and different negative pressure values ​​of the negative pressure chamber 3 will cause the test ball 21 to be subjected to different adsorption forces, and then when the vehicle stability test is performed, the required test results can be obtained according to the corresponding test ball 21 that is bounced. When selecting, the elastic coefficient of the piston spring 6 adopts a gradient type, and the negative pressure value obtained also changes in a gradient.

[0018] When used, the test method is as follows:

[0019] The device is installed on the vehicle, one end of the control valve connecting pipe 15 is connected to the suction pipe of the suction pump, the suction pump is turned on, and then the test ball 21 is placed on the test ball recess seat 2-1. When the car is about to reach the obstacle, the first electrically controlled valve 16 is opened, the negative pressure chamber 3 is negatively pressurized, and the piston 8-1 is compressed by the atmospheric pressure, and then the piston spring 6 is contracted, and the piston rod 8 moves to the right until the conical sealing plug 9 plugs the suction pipe 12, and the negative pressure chamber 3 automatically stops pumping. Based on the different elastic coefficients of the piston spring 6, the negative pressure values ​​of the respective negative pressure chambers 3 of several test cylinders 1 are different, so different gradients of negative pressure values ​​are obtained for testing, and the first electrically controlled valve 16 is manually controlled to close by pressing the switch. After a test is completed, some test balls 21 are ejected, the negative pressure chamber 3 is back-pressurized, and then the inner cavity 13 of the suction pipe 12 is back-pressurized by controlling the second electrically controlled valve 18 to open, and the piston 8-1 is reset by the piston spring 6, and then the next repeated test is performed.

Claims

1. A test device for measuring the stability index of a car during driving, characterized in that: It includes a test cylinder, a boss seat is provided in the middle part of the test cylinder, a test ball recess seat is provided in the middle part of the top surface of the boss seat, a gasket is also provided at the test ball recess seat, a negative pressure chamber is connected to the lower part of the test ball recess seat, a pressure regulating self-locking device is provided at the lower part of the negative pressure chamber, the pressure regulating self-locking device is provided with a cavity, the cavity is connected to the negative pressure chamber, a piston chamber is provided on the left side, and an exhaust pipe is connected to the right side; a piston rod and a piston spring are distributed in the piston chamber, and a breathing hole is also provided at the left end of the piston chamber; a movable guide rod is also connected to one end of the piston rod, a conical sealing plug is provided at the left end of the movable guide rod, and a sliding air-permeable ring is provided at the right end of the movable guide rod, and the sliding air-permeable ring can be movably distributed in the inner cavity of the exhaust pipe; it also includes a test ball, and the test balls are correspondingly distributed on the test ball recess seat.

2. A test device for measuring the stability index of a vehicle during driving according to claim 1, characterized in that: A plurality of the test tubes are provided; the right end of the air extraction pipe is also connected to an air extraction main pipe, and a plurality of test tubes are distributed in a row and are all connected to the air extraction main pipe; the end of the air extraction main pipe is connected to a control valve connecting pipe, on which a first electric-controlled valve is provided, and the control valve connecting pipe is also connected to an air return pipe, on which a second electric-controlled valve is distributed, and the air return pipe is distributed between the first electric-controlled valve and the air extraction main pipe.

3. A method for testing using a test device for measuring a vehicle driving stability index as claimed in any one of claims 1 to 2, characterized in that: The steps include: (1) Install the device on the vehicle, connect one end of the control valve connecting pipe to the suction pipe of the suction pump, and turn on the suction pump; (2) Then place the test ball on the test ball recess seat; (3) When the car is about to reach the obstacle, the first electrically controlled valve is opened, the negative pressure chamber is under negative pressure, the piston is compressed by the atmospheric pressure, and then the piston spring contracts, the piston rod moves to the right until the conical sealing plug blocks the air extraction pipe, and the negative pressure chamber automatically stops exhausting. Based on the different elastic coefficients of the piston spring, the negative pressure values ​​of the negative pressure chambers of the several test cylinders are different, so that negative pressure values ​​with different gradients are obtained for testing; (4) The first electrically controlled valve is manually controlled to close by pressing the switch; after a test, some test balls are ejected, the negative pressure chamber is back-pressurized, and then the second electrically controlled valve is controlled to open, the inner cavity of the exhaust pipe is back-pressurized, and the piston is reset by the piston spring, and then the next test is repeated.

Images