Calibrating device of motor vehicle parking braking performance testing device

Abstract

The utility model discloses a calibration device of a motor vehicle parking braking performance testing device, which comprises a main case, a hydraulic oil diverter valve, a hydraulic manual pump and a plurality of high-pressure hoses, and the hydraulic manual pump is communicated with an oil inlet end of the hydraulic oil diverter valve through the high-pressure hoses. The mainframe box is communicated with the oil outlet end of the hydraulic oil diverter valve through a high-pressure hose; a stress assembly, a force loading assembly, a standard sensor, a bolt connecting piece and a sensor connecting piece are arranged in the mainframe box; by adopting a mode that a hydraulic oil pump is matched with a jack, loading of pulling or pressing force of a sensor of a tested motor vehicle parking braking performance testing device is realized, and error comparison and judgment are carried out on the pulling or pressing force and a force value borne by a standard sensor.

Description

Technical Field

[0001] This utility model belongs to the technical field of metrology and testing devices, and in particular relates to a calibration device for a motor vehicle parking brake performance testing device. Background Technology

[0002] The parking brake, also known as the handbrake, provides resistance to the car when it is parked, preventing it from rolling. For safety reasons, vehicles undergo annual inspections using a parking brake performance tester. This tester measures the parking brake performance of a vehicle. Within this device, sensors (such as force sensors) primarily measure the braking force applied during parking. Sensors convert physical quantities (like braking force) into electrical signals, and their output directly affects the accuracy and reliability of the data.

[0003] In motor vehicle parking brake performance testing, if the sensor measurement is inaccurate, the obtained braking force data may be biased, thus affecting the accurate judgment of the vehicle's parking brake performance. For example, it may misjudge a vehicle with unqualified braking performance as qualified, or vice versa, which will bring safety hazards. Moreover, with the increase of usage time, changes in ambient temperature and humidity, and slight differences in manufacturing, the measurement accuracy of the sensor may decrease. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a calibration device for a motor vehicle parking brake performance testing device, which addresses the shortcomings of the existing technology. The device uses a hydraulic pump in conjunction with a jack to apply a pulling or pressing force to the sensor of the parking brake performance testing device of the motor vehicle being tested, and then compares and judges the error with the force value borne by the standard sensor.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A calibration device for a motor vehicle parking brake performance testing device includes a main unit, a hydraulic oil diversion valve, a hydraulic manual pump, and several high-pressure hoses. The hydraulic manual pump is connected to the inlet of the hydraulic oil diversion valve via high-pressure hoses, and the main unit is connected to the outlet of the hydraulic oil diversion valve via high-pressure hoses. The main unit contains a force-bearing component, a force-loading component, a standard sensor, a pin connector, and a sensor connector. The force-loading component is installed at the rear end of the force-bearing component and connected to the outlet of the hydraulic oil diversion valve via high-pressure hoses. The standard sensor is connected to the force-loading component via pin connectors, and the sensor connectors are respectively installed at the front end of the standard sensor and the front end of the first force-bearing frame.

[0007] Furthermore, the force-bearing component includes a first force-bearing frame and a second force-bearing frame composed of a front end plate, a rear end plate, a support column, and a nut. The second force-bearing frame is inserted at the rear end of the first force-bearing frame, thereby the first force-bearing frame divides the second force-bearing frame into a tension loading zone and a compression loading zone. The sensor connector is respectively installed at the front end of the standard sensor and the front end of the first force-bearing frame, and the force loading component is respectively installed in the tension loading zone and the compression loading zone.

[0008] Furthermore, the force loading assembly includes a pull jack and a press jack. The press jack is fixed to the left side of the rear end plate of the first force-bearing frame, and its movable end is connected to a standard sensor through a pin connector. The pull jack is fixed to the right side of the rear end plate of the first force-bearing frame, and its movable end is fixed to the rear end plate of the second force-bearing frame.

[0009] Furthermore, the size of the second force-bearing frame is smaller than that of the first force-bearing frame, and the front end plate of the second force-bearing frame is spaced apart from the front end plate of the first force-bearing frame by a certain distance. Sliding members are provided at the bottom of both the front end plate and the rear end plate of the second force-bearing frame. The sliding members are composed of a slide rail and a slider.

[0010] Furthermore, the pin connector includes a connecting sleeve and a pin rod. The front end of the connecting sleeve is screwed to the rear end of the standard sensor, and its rear end is connected to the movable end that presses against the jack. The pin rod is disposed through the middle of the connecting sleeve.

[0011] Furthermore, the sensor connector includes a first connecting screw, a second connecting screw, and a connecting nut. The first connecting screw is screwed onto the front end of the standard sensor, the second connecting screw is inserted into the front end plate of the first force-bearing frame, and the connecting nut is sleeved on the second connecting screw.

[0012] Furthermore, a limiting plate is fitted in the middle of both the pulling jack and the pressing jack, and several grooves are provided on both sides of the limiting plate so that the support column of the second force-bearing frame can pass through.

[0013] The beneficial effects of this utility model are as follows:

[0014] (1) This utility model generates hydraulic oil pressure by manually operating a hydraulic manual pump and discharges hydraulic oil. Then, the hydraulic oil is distributed to different jacks through a hydraulic oil diversion valve, thereby controlling the lifting motion of the pull jack and the press jack in two directions. The standard sensor and the sensor under test are subjected to pull or press force, and the error of the pull or press force between the standard sensor and the sensor under test is compared to determine the accuracy of the sensor in the test device for testing the parking brake performance of the tested motor vehicle.

[0015] (2) This utility model can connect sensors of different manufacturers and specifications of the tested equipment by equipping them with second connecting screws and connecting nuts of different specifications. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0017] Figure 2 This is a top view of the internal structure of the main unit chassis of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the main unit chassis of this utility model. Figure 1 ;

[0019] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the main unit chassis of this utility model. Figure 2 .

[0020] In the diagram, 1 is the main unit housing, 11 is the operating port, 12 is the connection port, 13 is the window, 2 is the hydraulic oil diverter valve, 3 is the hydraulic manual pump, 4 is the force-bearing component, 41 is the first force-bearing frame, 42 is the second force-bearing frame, 43 is the sliding component, 5 is the force loading component, 51 is the pull-to-jack, 52 is the press-to-jack, 53 is the limit plate, 6 is the standard sensor, 7 is the pin connector, 71 is the connecting sleeve, 72 is the pin rod, 8 is the sensor connector, 81 is the first connecting screw, 82 is the second connecting screw, and 83 is the connecting nut. Detailed Implementation

[0021] 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.

[0022] As attached Figure 1-4As shown in the figure, a calibration device for a motor vehicle parking brake performance testing device in this embodiment of the present invention includes a main unit 1, a hydraulic oil diversion valve 2, a hydraulic manual pump 3, and several high-pressure hoses (not shown in the figure). The hydraulic manual pump 3 is connected to the oil inlet of the hydraulic oil diversion valve 2 through the high-pressure hoses, and the main unit 1 is connected to the oil outlet of the hydraulic oil diversion valve 2 through the high-pressure hoses. The main unit 1 is internally provided with a force-bearing component 4, a force loading component 5, a standard sensor 6, a pin connector 7, and a sensor connector 8. The force loading component 5 is installed at the rear end of the force-bearing component 4 and is connected to the oil outlet of the hydraulic oil diversion valve 2 through the high-pressure hoses. The standard sensor 6 is connected to the force loading component 5 through the pin connector 7, and the sensor connector 8 is respectively installed at the front end of the standard sensor 6 and the front end of the force-bearing component 4.

[0023] The hydraulic oil diversion valve 2 has two oil outlets and a pull valve and a press valve to control the oil flow. The pull valve and the press valve control the flow of hydraulic oil to the pull jack 51 or the press jack 52. The standard sensor 6 is used to collect standard force and needs to be connected to a display instrument (not shown in the figure). The hydraulic manual pump 3 is used as the power source of the calibration device.

[0024] Specifically, hydraulic oil is pumped out by manually operating the hydraulic pump 3 to generate hydraulic oil pressure. The hydraulic oil is then distributed to different jacks by the hydraulic oil diversion valve 2, thereby controlling the lifting motion of the pull jack 51 and the press jack 52 in two directions. The standard sensor 6 and the sensor under test are subjected to a pull (0-10T) or press (0-5T) force. The error of the pull or press force between the standard sensor 6 and the sensor under test is then compared to determine the accuracy of the sensor under test.

[0025] The force-bearing component 4 includes a first force-bearing frame 41 and a second force-bearing frame 42, which are composed of a front end plate, a rear end plate, a support column and a nut. The second force-bearing frame 42 is inserted through the rear end of the first force-bearing frame 41, thereby the first force-bearing frame 41 divides the second force-bearing frame 42 into a tension loading area and a compression loading area. The sensor connector 8 is respectively installed at the front end of the standard sensor 6 and the front end of the first force-bearing frame 41. The force loading component 5 is respectively installed in the tension loading area and the compression loading area.

[0026] The force loading assembly 5 includes a pull jack 51 and a press jack 52. The press jack 52 is fixed to the left side of the rear end plate of the first force-bearing frame 41, and its movable end is connected to the standard sensor 6 through a pin connector 7. The pull jack 51 is fixed to the right side of the rear end plate of the first force-bearing frame 41, and its movable end is fixed to the rear end plate of the second force-bearing frame 42. The pull jack 51 and the press jack 52 are respectively connected to the two oil outlets of the hydraulic oil diversion valve 2 through high-pressure hoses.

[0027] The second force-bearing frame 42 is smaller than the first force-bearing frame 41, and the front end plate of the second force-bearing frame 42 is spaced apart from the front end plate of the first force-bearing frame 41 by a certain distance. This distance can be used to place the sensor of the vehicle parking brake performance testing device under test. The bottom of the front end plate and the rear end plate of the second force-bearing frame 42 are provided with sliding members 43. The sliding members 43 are composed of slide rails and sliders, and can drive the traction of the second force-bearing frame 42 and the force loading component 5 through the sliding members 43.

[0028] The pin connector 7 includes a connecting sleeve 71 and a pin rod 72. The front end of the connecting sleeve 71 passes through the front end plate of the second force-bearing frame 42 and is screwed to the rear end of the standard sensor 6. Its rear end is connected to the movable end that presses against the jack 52. The pin rod 72 is disposed through the middle of the connecting sleeve 71.

[0029] Specifically, the top of the main unit 1 is provided with an operation port 11, and the top end of the pin rod 72 extends upward through the operation port 11; during calibration, the pin rod 72 can be pulled to move in the operation port 11, thereby driving the second force-bearing frame 42 and the force loading component 5 to slide on the slider 43.

[0030] The sensor connector 8 includes a first connecting screw 81, a second connecting screw 82, and a connecting nut 83. The first connecting screw 81 is screwed onto the front end of the standard sensor 6. The second connecting screw 82 is inserted into the front end plate of the first force-bearing frame 41. The connecting nut 83 is sleeved on the second connecting screw 82. The sensor to be tested is connected and fixed by the first connecting screw 81 and the second connecting screw 82, so that it can be linked with the standard sensor 6.

[0031] Specifically, the front of the main unit 1 has a connection port 12 through which the second connecting screw 82 passes; the top of the main unit 1 has a window 13 to facilitate the placement of the sensor to be tested between the first connecting screw 81 and the second connecting screw 82.

[0032] In this embodiment of the invention, sensors of different manufacturers and specifications can be connected by equipping them with second connecting screws 82 and connecting nuts 83 of different specifications.

[0033] Both the pull-to-jack 51 and the press-to-jack 52 are fitted with limiting plates 53. The limiting plates 53 have several grooves on both sides for the support columns of the second force-bearing frame 42 to pass through, so that the second force-bearing frame 42 will not be blocked by the limiting plates 53 when it moves.

[0034] In a specific implementation of this utility model, the method for operating the tensile force value of the calibration device is as follows:

[0035] First, move the pin 72 to the leftmost side of the operating port 11 to ensure that the second force-bearing frame 42 and the force loading component 5 are located on the leftmost side. Then, screw the sensor to be tested to the front end of the standard sensor 6 through the first connecting screw 81, and then fix it by cooperating with the connecting nut 83 through the second connecting screw 82. At this time, the connecting nut 83 is located on the left side of the front end plate of the first force-bearing frame 41.

[0036] Next, open the pull valve of the hydraulic oil diversion valve 2 and close the pressure valve. Tighten the oil circuit valve at the front end of the hydraulic manual pump 3 clockwise and loosen the air valve at the rear end counterclockwise. Turn on the display instrument and start the device under test. Manually operate the hydraulic manual pump 3 to pressurize and control the pull jack 51 to apply pull load until the maximum range. Then compare the pull force error between the standard sensor 6 and the sensor under test.

[0037] Finally, after loading the required calibration values, turn the oil circuit valve at the front end of the hydraulic manual pump 3 counterclockwise to release the pressure on the jack 51 and return it to its initial state.

[0038] In a specific implementation of this utility model, the method for applying the compressive force value of the calibration device is as follows:

[0039] First, move the pin 72 to the rightmost side of the operating port 11 to ensure that the second force-bearing frame 42 and the force loading component 5 are located on the rightmost side. Then, screw the sensor to be tested to the front end of the standard sensor 6 through the first connecting screw 81, and then fix it by cooperating with the connecting nut 83 through the second connecting screw 82. At this time, the connecting nut 83 is located on the right side of the front end plate of the first force-bearing frame 41 and abuts against its front end plate.

[0040] Next, open the pressure valve of the hydraulic oil diversion valve 2 and close the pull valve. Tighten the oil circuit valve at the front end of the hydraulic manual pump 3 clockwise and loosen the air valve at the rear end counterclockwise. Turn on the display instrument and start the device under test. Manually operate the hydraulic manual pump 3 to pressurize and control the pressure jack 52 to apply pressure load until the maximum range is reached. Then compare the pressure force error between the standard sensor 6 and the sensor under test.

[0041] Finally, after loading the required calibration values, turn the oil circuit valve at the front end of the hydraulic manual pump 3 counterclockwise to release the pressure on the jack 52 and return it to its initial state.

[0042] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A calibration device for a motor vehicle parking brake performance testing device, characterized in that: The system includes a main unit housing, a hydraulic oil diversion valve, a hydraulic manual pump, and several high-pressure hoses. The hydraulic manual pump is connected to the inlet of the hydraulic oil diversion valve via high-pressure hoses, and the main unit housing is connected to the outlet of the hydraulic oil diversion valve via high-pressure hoses. The main unit housing contains a force-bearing component, a force-loading component, a standard sensor, a pin connector, and a sensor connector. The force-loading component is installed at the rear end of the force-bearing component and is connected to the outlet of the hydraulic oil diversion valve via a high-pressure hose. The standard sensor is connected to the force-loading component via a pin connector, and the sensor connectors are respectively installed at the front end of the standard sensor and the front end of the first force-bearing frame.

2. The calibration device for the motor vehicle parking brake performance testing device according to claim 1, characterized in that: The force-bearing component includes a first force-bearing frame and a second force-bearing frame, which are composed of a front end plate, a rear end plate, a support column, and a nut. The second force-bearing frame is inserted at the rear end of the first force-bearing frame, thereby the first force-bearing frame divides the second force-bearing frame into a tension loading zone and a compression loading zone. The sensor connector is respectively installed at the front end of the standard sensor and the front end of the first force-bearing frame. The force loading component is respectively installed in the tension loading zone and the compression loading zone.

3. The calibration device for the motor vehicle parking brake performance testing device according to claim 2, characterized in that: The force loading assembly includes a pull jack and a press jack. The press jack is fixed to the left side of the rear end plate of the first force-bearing frame, and its movable end is connected to a standard sensor through a pin connector. The pull jack is fixed to the right side of the rear end plate of the first force-bearing frame, and its movable end is fixed to the rear end plate of the second force-bearing frame.

4. The calibration device for the motor vehicle parking brake performance testing device according to claim 2, characterized in that: The second force-bearing frame is smaller than the first force-bearing frame, and the front end plate of the second force-bearing frame is spaced a certain distance from the front end plate of the first force-bearing frame. Sliding members are provided at the bottom of both the front end plate and the rear end plate of the second force-bearing frame. The sliding members are composed of slide rails and sliders.

5. The calibration device for the motor vehicle parking brake performance testing device according to claim 3, characterized in that: The pin connector includes a connecting sleeve and a pin rod. The front end of the connecting sleeve is screwed to the rear end of the standard sensor, and its rear end is connected to the movable end that presses against the jack. The pin rod is disposed through the middle of the connecting sleeve.

6. The calibration device for the motor vehicle parking brake performance testing device according to claim 1, characterized in that: The sensor connector includes a first connecting screw, a second connecting screw, and a connecting nut. The first connecting screw is screwed onto the front end of the standard sensor, the second connecting screw is inserted into the front end plate of the first force-bearing frame, and the connecting nut is sleeved on the second connecting screw.

7. The calibration device for the motor vehicle parking brake performance testing device according to claim 3, characterized in that: Both the pull-to-jack and the press-to-jack are fitted with limiting plates in the middle, and the limiting plates are provided with several grooves on both sides for the support columns of the second force-bearing frame to pass through.

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