Air tightness detection device for vehicle anti-pinch strip

Abstract

The present invention discloses a device for detecting air tightness of anti-pinch strips for vehicles, comprising a frame, a test platform fixedly arranged on the top of the frame, an instrument platform arranged above the frame and movable up and down, a fixture fixedly arranged on the top of the test platform for mounting the anti-pinch strips, a measuring component arranged above the fixture, and a driving device fixedly arranged on the test platform for driving the measuring component to move up and down and apply pressure to the anti-pinch strips; a secondary instrument and an industrial computer are placed on the instrument platform, and the measuring component, the secondary instrument and the industrial computer are electrically connected in sequence. The parameters and judgment rules for detecting air tightness of the anti-pinch strips can be set in the industrial computer, and the testing process is automatically performed, which reduces the labor intensity, avoids the influence of human factors on the test results, and does not pollute the anti-pinch strips.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle anti-pinch strip detection devices, and in particular to a vehicle anti-pinch strip air tightness detection device. Background Art

[0002] The anti-pinch strip is an important component in the current anti-pinch system of automobile doors. It is used to detect whether the door has clamped an object or a person, and feeds back the detection result to the single-chip microcomputer to control the door to open again, thus achieving the role of safety protection. The main body of the anti-pinch strip is made of rubber, and its interior is a hollow structure. After being installed on the car, it relies on the internal air to act on the main body of the rubber to achieve a sealing effect. If there are tiny cracks or pinholes on the anti-pinch strip, it is difficult to detect, which will lead to poor air tightness of the anti-pinch strip, and poor sealing performance of the car after being installed on the car.

[0003] Therefore, the anti-pinch strip needs to be tested for air tightness during production. Traditional manual testing generally uses water testing, that is, inflating the anti-pinch strip, then putting it in water, and observing with the naked eye whether there are bubbles. This method is labor-intensive, prone to missed inspections, and will also pollute the anti-pinch strip. If the air pressure is too high, it will cause irreparable damage to the anti-pinch strip. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a vehicle anti-pinch strip air tightness detection device, which is used to solve the drawbacks of manual anti-pinch strip air tightness detection.

[0005] To solve the above problems, the technical solution adopted by the present invention is:

[0006] A vehicle anti-pinch strip air tightness detection device comprises a frame, a test platform fixedly arranged on the top of the frame, an instrument platform arranged above the frame and movable up and down, a fixture fixedly arranged on the top of the test platform for mounting the anti-pinch strip, a measuring component arranged above the fixture, and a driving device fixedly arranged on the test platform for driving the measuring component to move up and down and apply pressure to the anti-pinch strip; a secondary instrument and an industrial computer are placed on the instrument platform, and the measuring component, the secondary instrument and the industrial computer are electrically connected in sequence.

[0007] Furthermore, a crossbeam is provided between the instrument platform and the test platform, and the measuring assembly includes a vertical middle plate connected to the crossbeam, a sensor unit vertically fixed at the bottom of the middle plate, a connecting plate fixed at the bottom of the sensor unit, and a pressure plate fixed at the bottom of the connecting plate for applying pressure to the anti-pinch strip; the crossbeam is connected to the driving device, and the sensor unit is electrically connected to the secondary instrument.

[0008] Furthermore, the driving device includes a ball screw linear module vertically fixed on the top of the test platform and a motor transmission-connected to the ball screw linear module, the slider of the ball screw linear module is fixedly connected to the crossbeam, and the slide seat of the ball screw linear module is fixedly connected to the test platform.

[0009] Furthermore, the top of the test platform is rotatably connected to a transmission shaft parallel to the crossbeam, and the ball screw linear modules are two arranged at both ends of the transmission shaft. The two ends of the transmission shaft are respectively connected to the corresponding ball screw linear modules through a bevel gear pair, and the motor is connected to the transmission shaft.

[0010] Furthermore, the motor is a servo motor.

[0011] Furthermore, a column is fixedly arranged on the test platform, and the instrument platform is slidably connected to the column.

[0012] Furthermore, one side of the column is rotatably connected to a vertical lead screw, and the test platform and the lead screw are threadedly driven.

[0013] Furthermore, the sensor unit is a pressure sensor and a displacement sensor fixedly connected to the pressure sensor.

[0014] Furthermore, the sensor unit is a pressure-displacement integrated sensor.

[0015] The positive effects of the present invention are:

[0016] The present invention is provided with a measuring component, a driving device, a fixture, a secondary instrument and an industrial computer. The detection parameters and judgment rules can be set in the industrial computer. The test process is automatically performed, which reduces the labor intensity, avoids the influence of human factors on the test results, and will not pollute the anti-pinching strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a partial enlarged view of the measurement component part;

[0019] In the figure, 1. secondary instrument; 2. industrial computer; 3. instrument platform; 4. crossbeam; 5. column; 6. servo motor; 7. ball screw linear module; 8. bevel gear pair; 9. transmission shaft; 10. measuring component; 11. pressure plate; 12. button station; 13. test platform; 14. rack; 15. fixture; 1001. middle plate; 1002. pressure displacement integrated sensor; 1003. connecting plate. DETAILED DESCRIPTION

[0020] like Figure 1 and Figure 2 As shown, a vehicle anti-pinch strip air tightness detection device is characterized in that it includes a frame 14, a rectangular test platform 13 fixedly arranged on the top of the frame 14, a rectangular instrument platform 3 arranged above the frame 14 and movable up and down, a fixture 15 fixedly arranged on the top of the test platform 13 for clamping the anti-pinch strip, a measuring component 10 arranged above the fixture 15, and a driving device fixedly arranged on the test platform 13 for driving the measuring component 10 to move up and down and apply pressure to the anti-pinch strip. The frame 14 is assembled from aluminum alloy profiles, and the fixture 15 is composed of two front and rear cardboards, and there is a cavity between the two cardboards with a shape corresponding to the anti-pinch strip. The cardboard on the rear side is fixedly connected to the test platform 13 by screws, and the cardboard on the front side is slidably connected to the test platform 13 and can be locked by the locking nut on the cardboard. A secondary instrument 1 and an industrial computer 2 are placed on the instrument platform 3, and the measuring component 10, the secondary instrument 1 and the industrial computer 2 are electrically connected in sequence.

[0021] A crossbeam 4 is provided between the instrument platform 3 and the test platform 13. The measuring assembly 10 includes three vertical intermediate plates 1001 arranged along the direction of the crossbeam and slidably connected to the crossbeam 4. A sensor unit is fixedly provided at the lower part of each intermediate plate 1001. A rectangular connecting plate 1003 is fixedly connected under each sensor unit. A pressing plate 11 is provided above the fixture 15. The connecting plates 1003 are fixedly connected to the pressing plate 11 by screws. The crossbeam 4 is connected to the driving device, and the sensor unit is electrically connected to the secondary instrument 1.

[0022] The driving device includes a ball screw linear module 7 vertically fixed on the top of the test platform 13 and a servo motor 6 transmission-connected to the ball screw linear module 7. The slider of the ball screw linear module 7 is fixedly connected to the crossbeam 4 by screws, and the slide seat of the ball screw linear module 7 is fixedly connected to the test platform 13 by screws.

[0023] The top of the test platform 13 is rotatably connected to a transmission shaft 9 parallel to the crossbeam 4. The ball screw linear modules 7 are arranged at two ends of the transmission shaft 9. The two ends of the transmission shaft 9 are respectively connected to the corresponding ball screw linear modules 7 through a bevel gear pair 8. The servo motor 6 is connected to the synchronous pulley fixed on the transmission shaft 9 through a synchronous belt.

[0024] The left and right ends of the test platform 13 are fixed with columns 5 by screws, and the columns 5 and the instrument platform 3 are both slidably matched. The rear side of the columns 5 is rotatably connected with a vertical lead screw, and the test platform 13 and the corresponding lead screw are threaded, and the top of the lead screw is provided with a hand wheel. By turning the hand wheel, the height of the instrument platform 3 can be adjusted to facilitate the test operation.

[0025] The sensor unit is a pressure-displacement integrated sensor 1002 electrically connected to the secondary instrument 1. This sensor integrates the two functions of pressure measurement and displacement measurement, can measure pressure and displacement simultaneously, and transmit the measured data to the secondary instrument. The sensor unit can also be a separate pressure sensor and displacement sensor.

[0026] A controller is also disposed in the frame 14 , the industrial computer 2 is electrically connected to the controller, the controller is electrically connected to the servo motor 6 , and a button station 12 electrically connected to the controller is disposed on the front side of the frame 14 .

[0027] The working process of the present invention is:

[0028] 1. Clamp the anti-pinch strip to be tested between the two clamping plates of the fixture 15, and lock the front clamping plate. At this time, the top of the anti-pinch strip is located in the same plane, which is the reference plane. The reference plane is parallel to the test platform 13, and the plane is higher than the top surface of the fixture 15. The left and right ends of the anti-pinch strip are squeezed by the left and right ends of the two clamping plates to close the cavity inside the anti-pinch strip.

[0029] 2. Operate the button station 12, the controller controls the servo motor 6 to move, thereby driving the pressure plate 11 to move downward. When the pressure plate 11 reaches the reference plane, it continues to move downward by 2 mm. The moving distance is measured by the pressure-displacement integrated sensor 1002, and the pressure-displacement integrated sensor 1002 also measures the pressure value F1 at this time.

[0030] 3. The pressure plate 11 returns upward and then moves downward again. After reaching the reference plane, it continues to move downward by 2 mm, waits for 5 seconds, and then moves downward to a position 2.5 mm away from the reference plane. The pressure sensor measures the pressure value F2 at this time.

[0031] 4. Secondary instrument 1 transmits the collected F1 and F2 to industrial computer 2, which makes a judgment. When F2-F1>1 Newton, it is judged as qualified, otherwise it is unqualified. (If the air tightness of the anti-pinch strip is poor, leakage will occur, and the air inside it will escape when compressed, so this part of the force will remain unchanged or change very little, and the amount of change is related to the amount of leakage. At this time, the difference between F2 and F1 is only the force generated when the rubber of the anti-pinch strip is deformed, so that F2 is close to F1). The judgment rule and the pressing distance can be adjusted according to the specifications of the anti-pinch strip.

[0032] In actual use, the pressing distance, time control and judgment rules can be set in the industrial computer 2, and the test process is automatic, which reduces labor intensity and avoids the influence of human factors on the test results.

[0033] The above-mentioned embodiments are described in a relatively detailed and specific manner, expressing the preferred embodiments of the present invention, and are only used to illustrate the technical ideas and features of the present invention. The purpose is to enable technicians in this field to understand the contents of the present invention and implement them accordingly, but are not limited to the present invention. The patent scope of the present invention cannot be limited only by this embodiment, that is, any equivalent changes or modifications made to the spirit disclosed by the present invention, for researchers or technicians in this field, without departing from the structure of the present invention, local improvements within the system and changes and conversions between subsystems, etc., are still within the patent scope of the present invention.

Claims

1. A vehicle anti-pinch strip air tightness detection device, characterized in that: The invention comprises a frame (14), a test platform (13) fixedly arranged on the top of the frame (14), an instrument platform (3) arranged above the frame (14) and movable up and down, a fixture (15) fixedly arranged on the top of the test platform (13) for mounting an anti-clamping strip, a measuring component (10) arranged above the fixture (15), and a driving device fixedly arranged on the test platform (13) for driving the measuring component (10) to move up and down and apply pressure to the anti-clamping strip; a secondary instrument (1) and an industrial computer (2) are placed on the instrument platform (3); the measuring component (10), the secondary instrument (1) and the industrial computer (2) are electrically connected in sequence; The anti-pinch strip is fixed by a fixture (15) so that the inner cavity of the anti-pinch strip is closed, and then the measuring component (10) is moved downward to generate displacement, and pressure is applied to the anti-pinch strip. The pressure value F1 of the displacement is measured. After the applied pressure is removed, the measuring component (10) applies pressure to the anti-pinch strip again and moves the same displacement. After that, the anti-pinch strip is moved downward again and a certain displacement is increased. The pressure value F2 at this time is measured. The difference between F2 and F1 is compared to see whether it is greater than the expected value, so as to judge the air tightness of the anti-pinch strip.

2. The air tightness detection device for vehicle anti-pinch strip according to claim 1, characterized in that: A crossbeam (4) is provided between the instrument platform (3) and the test platform (13); the measuring assembly (10) comprises a vertical middle plate (1001) connected to the crossbeam (4), a sensor unit vertically fixedly arranged at the bottom of the middle plate (1001), a connecting plate (1003) fixedly arranged at the bottom of the sensor unit, and a pressure plate (11) fixedly connected to the bottom of the connecting plate (1003) for applying pressure to the anti-pinching strip; the crossbeam (4) is connected to a driving device, and the sensor unit is electrically connected to a secondary instrument (1).

3. The air tightness detection device for anti-pinch strips for vehicles according to claim 1, characterized in that: The driving device comprises a ball screw linear module (7) vertically fixedly arranged on the top of the test platform (13) and a motor drivingly connected to the ball screw linear module (7), a slider of the ball screw linear module (7) being fixedly connected to the crossbeam (4), and a slide seat of the ball screw linear module (7) being fixedly connected to the test platform (13).

4. The air tightness detection device for vehicle anti-pinch strip according to claim 3, characterized in that: The top of the test platform (13) is rotatably connected to a transmission shaft (9) parallel to the crossbeam (4); the ball screw linear modules (7) are arranged at two ends of the transmission shaft (9); the two ends of the transmission shaft (9) are respectively connected to the corresponding ball screw linear modules (7) through a bevel gear pair (8); and the motor is connected to the transmission shaft (9).

5. The air tightness detection device for vehicle anti-pinch strip according to claim 3, characterized in that: The motor is a servo motor (6).

6. The air tightness detection device for vehicle anti-pinch strip according to claim 1, characterized in that: A column (5) is fixedly arranged on the test platform (13), and the instrument platform (3) is slidably connected to the column (5).

7. The air tightness detection device for vehicle anti-pinch strip according to claim 6, characterized in that: One side of the upright column (5) is rotatably connected to a vertical lead screw, and the test platform (13) and the lead screw are threadedly connected.

8. The air tightness detection device for anti-pinch strips for vehicles according to claim 2, characterized in that: The sensor unit is a pressure sensor and a displacement sensor fixedly connected to the pressure sensor.

9. The air tightness detection device for vehicle anti-pinch strip according to claim 2, characterized in that: The sensor unit is a pressure-displacement integrated sensor (1002).

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