Portable automatic calibration device for automobile brake control force meter

Abstract

The utility model relates to a portable automatic calibration device for an automobile brake control force meter. The portable automatic calibration device comprises a base, a supporting column, a servo electric cylinder, an electric cylinder supporting plate, a cross beam, a tension sensor, a hand tension meter clamp, a pedal force meter clamp and a pressure sensor. The electric cylinder supporting plates are fixed to the two sides of the top face of the base, the servo electric cylinders are fixed to the tops of the electric cylinder supporting plates on the two sides, the supporting columns are fixed to the two sides of the top face of the base, the beam is connected to the upper portions of the supporting columns on the two sides, the height of the beam on the supporting columns is adjustable, the tension sensor is arranged on the beam, and the hand tension meter clamp is fixed to the bottom face of the beam. The pedal force meter clamp is movably connected to the top face of the base, the pedal force meter clamp can switch the clamping area of the horizontal table top and the clamping area of the 30-degree table top and can move the clamping area to the position below an output shaft of the servo electric cylinder, the pressure sensor is arranged on the surface of the clamping area, and the clamping range of the clamping area can be adjusted. According to the scheme, the device is convenient to carry and is not restricted by places, the calibration time is shortened, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile brake dynamometer calibration, in particular to a portable automatic calibration device for automobile brake dynamometer. Background Art

[0002] To ensure the safety of the car during driving, various systems need to be checked before leaving the factory, and the vehicle braking system is an important part of it. The vehicle braking system mainly includes the brake pedal and the handbrake, and its performance directly affects the safety performance of the car. The detection of the vehicle braking system can accurately prevent and reduce road traffic accidents caused by vehicle factors.

[0003] Automobile brake dynamometers are divided into automobile brake pedal dynamometers and automobile brake hand dynamometers. Automobile brake pedal dynamometers are dynamometers that measure the force acting on the brake pedal when the vehicle is braking, and are referred to as pedal dynamometers. Automobile brake hand dynamometers are dynamometers that measure the force acting on the operating device when the vehicle is parking, and are referred to as hand dynamometers. The structure of an automobile brake dynamometer generally consists of a force sensor and a display device. The pedal dynamometer measures the compressive force value, and the hand dynamometer measures the tensile force value. According to the calibration methods specified in JJF1169--2007 "Calibration Specifications for Automobile Brake Operation Dynamometers", there are weight calibration method, sensor calibration method and force standard machine method. All three calibration methods require special equipment for calibration.

[0004] At present, the research and existing problems of similar calibration devices at home and abroad mainly include the following categories:

[0005] ① A calibration device that can only measure a single sensor. The patent announcement number is CN217953764U, and the name is an auxiliary calibration device for an automobile brake pedal force meter. Its disadvantage is that it can only measure a certain fixed model of pedal force meter.

[0006] ② Calibration device that can only measure vertical force. For example, the patent announcement number is CN208736607U, and the name is a brake dynamometer calibration device. Its disadvantage is that it can only measure vertical force, and cannot meet the requirements of JJF1169--2007 "Automobile Brake Operation Dynamometer Calibration Specification" to calibrate the indication error of the pedal dynamometer when tilted 30°. All calibration items in the regulations cannot be completed on one set of equipment.

[0007] ③ Calibration devices mainly used in fixed places. For example: Patent announcement number CN111664991B, named automatic calibration device for steering wheel angle meter and brake dynamometer for motor vehicles, because the device occupies a large area, due to the location constraints, the device to be calibrated can only be sent to the laboratory for calibration.

[0008] ④ Use force standard machine for testing. Foreign testing agencies mainly use this method, but its disadvantage is that it can only send the instrument for testing and the calibration time is relatively long.

[0009] ⑤ The current portable calibration device uses a purely mechanical loading force value, which cannot realize automatic force loading, and the accuracy and stability of the calibration results cannot meet actual needs.

[0010] These calibration devices can be used in fixed places and can be automated, but the devices are not easy to carry, and portable devices cannot be automated. For users such as car companies and manufacturers who use the devices in large quantities, if the process and time of device calibration can be shortened, it will be of great help in improving production efficiency. Therefore, the market has a great demand for calibration devices with compact size and integrated calibration and collection. Utility Model Content

[0011] In order to solve the above problems in the prior art, the utility model provides a portable automatic calibration device for an automobile brake dynamometer, which is easy to carry and improves operating efficiency.

[0012] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include: a portable automatic calibration device for a vehicle brake operating force meter, including a base, a support column, a servo electric cylinder, an electric cylinder support plate, a crossbeam, a tension sensor, a hand tension meter fixture, a pedal force meter fixture and a pressure sensor;

[0013] The electric cylinder support plate is fixed to both sides of the top surface of the base, the servo electric cylinder is fixed to the top of the electric cylinder support plates on both sides, the support column is fixed to both sides of the top surface of the base, the crossbeam is connected to the upper part of the support columns on both sides, and the height of the crossbeam on the support column is adjustable, the tension sensor is arranged on the crossbeam, and the hand tension gauge fixture is fixed to the bottom surface of the crossbeam;

[0014] The pedal force gauge clamp is movably connected to the top surface of the base. The pedal force gauge clamp can switch the clamping area of ​​the horizontal table surface and the clamping area of ​​the 30° table surface, and move the switched active area to below the output shaft of the servo electric cylinder. The pressure sensor is arranged on the surface of the clamping area, and the clamping range of the clamping area is adjustable.

[0015] The beneficial effects of the utility model are as follows: when calibrating the hand dynamometer, the head of the hand dynamometer needs to be fixed on the hand dynamometer fixture, and the tail of the hand dynamometer is connected and fixed to the output shaft of the servo electric cylinder. Since the height of the hand dynamometer fixture can be achieved by adjusting the height of the crossbeam, it can adapt to the inspection of hand dynamometers of different models and specifications; when calibrating the pedal dynamometer fixture, the horizontal table clamping area or the 30° table clamping area can be selected according to the needs to be calibrated directly below the servo electric cylinder, and then the vertical force value of the pedal dynamometer can be measured, and the force value in the inclined 30° direction can also be measured, so as to realize all the calibration items of the pedal dynamometer; in addition, since the clamping range of the clamping area of ​​the pedal dynamometer can be adjusted, it can adapt to the calibration of pedal dynamometer fixtures of different models and specifications. Moreover, the device of this scheme is easy to carry, not restricted by the location, and can be calibrated in the laboratory or at the work site, which shortens the calibration time and improves efficiency.

[0016] Preferably, it also includes a latch;

[0017] A socket is provided on the output shaft of the servo electric cylinder. One end of the pin can be connected to the tail fixing belt of the hand dynamometer, and the other end is inserted into the socket.

[0018] As described above, by providing a socket on the output shaft of the servo electric cylinder, the fixing belt at the tail of the tension gauge can be connected and fixed in cooperation with the pin, thereby facilitating the calibration operation.

[0019] Preferably, both sides of the top surface of the clamping area are provided with abutment pieces, and a first adjusting screw is passed through a side wall of one of the abutment pieces.

[0020] As described above, the clamping range of the clamping zone is adjusted by the first adjusting screw, which has a simple structure and is easy to operate.

[0021] Preferably, a plurality of slide grooves are provided at intervals on the surface of the base, and a sliding block adapted to the slide grooves is provided at the bottom of the pedal dynamometer fixture.

[0022] As described above, through the cooperation of the slide groove and the slider, the pedal dynamometer clamp can be easily moved on the surface of the base, so as to facilitate switching between different clamping areas to match different calibration items of the pedal dynamometer.

[0023] Preferably, the surface of the pedal dynamometer clamp is divided into a clamping area of ​​a horizontal table surface and a clamping area of ​​a 30° table surface at the front and back.

[0024] As described above, by dividing the surface of the pedal dynamometer clamp into a clamping area of ​​the horizontal table surface and a clamping area of ​​the 30° table surface at the front and back, the selected test item can be performed by moving the position of the clamping area, which is simple and convenient to operate.

[0025] Preferably, the pedal dynamometer fixture comprises a lower fixture and an upper fixture;

[0026] A column is provided in the middle of the surface of the lower clamp, a connecting block is provided on the bottom surface of the upper clamp, a rotating shaft is provided between the connecting block and the column, and the connecting block can rotate on the column through the rotating shaft, a 30° inclined surface is provided on the front side of the surface of the lower clamp, and the front bottom surface of the upper clamp can be rotated forward to fit with the front inclined surface of the lower clamp, so that the inclination angle of the clamping area on the surface of the upper clamp is 30°, a first screw hole is provided on the inclined surface, and a through hole matching the first screw hole is provided on the front side of the surface of the upper clamp;

[0027] The rear surface of the lower clamp is provided with a supporting wall, and the rear side of the upper clamp is provided with a lower edge extending downward. The rear bottom surface of the upper clamp can be rotated backward to fit with the top surface of the supporting wall, so that the clamping area of ​​the upper clamp surface is in a horizontal state. At this time, the lower edge of the rear side of the upper clamp is located on the rear side of the supporting wall, and a second adjusting screw is passed through the lower part of the lower edge, and a second screw hole matching the second adjusting screw is provided on the supporting wall.

[0028] As described above, the pedal dynamometer clamp is designed in the form of a lower clamp and an upper clamp that rotate together. The angle of the clamping area of ​​the upper clamp can be adjusted by adjusting the rotation angle of the upper clamp, and the state is fixed by means of screws or the like. This can reduce the area occupancy of the pedal dynamometer clamp in the horizontal direction of the device, thereby making the device as a whole more compact and more convenient to carry.

[0029] Preferably, the electric cylinder support plate is in an inverted L-shape, and the top end of the support column is fixedly connected to the outwardly extending portion of the top of the electric cylinder support plate.

[0030] As described above, the shape of the electric cylinder support plate is designed to be an inverted L-shape, which can facilitate the top end of the support column to be fixedly connected thereto, thereby ensuring the structural stability of the support column and making the overall structure of the device more compact.

[0031] Preferably, it also includes an adjusting nut;

[0032] The upper part of the support column is provided with a threaded area, the crossbeam is movably sleeved on the support columns at both sides, the adjusting nut is screwed on the threaded area on the upper part of the support column, and the adjusting nut is abutted against the bottom surface of the crossbeam.

[0033] As described above, the height of the crossbeam is controlled by adjusting the height of the nut on the upper threaded area of ​​the support column, which is simple and convenient to operate.

[0034] Preferably, it also includes a display instrument;

[0035] The display instrument is electrically connected to the pressure sensor and the tension sensor respectively.

[0036] As described above, the sensing data of the pressure sensor and the tension sensor are displayed and recorded by the display instrument, so that the calibration result can be judged more intuitively.

[0037] Preferably, it also includes a device protection housing;

[0038] The device protection shell is fixedly connected to the upper rear parts of the electric cylinder support plates on both sides.

[0039] As described above, by fixing the protective housing of the connecting device on the upper rear part of the electric cylinder support plates on both sides, the stability of the electric cylinder support plates can be improved, while preventing users from accidentally touching the inside of the device, thereby ensuring safety. In addition, the lower rear part of the electric cylinder support plates on both sides is unobstructed and has a hollow structure, which is convenient for the staff to adjust the clamping range of the 30° table clamping area from the rear side.

[0040] Preferably, it also includes a protective cover and a safety switch;

[0041] The electric cylinder support plate on one side is hinged to one side of the protective cover, the safety switch is provided on the support column on the other side, a handle and a safety lock adapted to the safety switch are provided on the other side of the protective cover, the safety switch is electrically connected to the servo electric cylinder, and when the protective cover is closed, the servo electric cylinder is located within the covering range of the electric cylinder support plate and the protective cover.

[0042] As mentioned above, when the protective cover is closed and the safety switch is turned on, the servo electric cylinder can be turned on to perform the calibration operation, thereby ensuring the safety of the calibration operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic diagram of the overall structure of a portable automatic calibration device for a vehicle brake dynamometer in Embodiment 1;

[0044] Figure 2 A side view of a portable automatic calibration device for a vehicle brake dynamometer in the first embodiment omitting the display instrument;

[0045] Figure 3 is a schematic structural diagram of the pedal dynamometer fixture in Example 1;

[0046] Figure 4 It is a schematic diagram of a scene of calibrating a pedal dynamometer in a clamping area of ​​a horizontal surface of a pedal dynamometer clamp in Embodiment 1;

[0047] Figure 5 It is a schematic diagram of a scene of calibrating a pedal dynamometer in a 30° table clamping area of ​​a pedal dynamometer fixture in Example 1;

[0048] Figure 6 A schematic diagram of a scene of calibrating a hand dynamometer in Embodiment 1;

[0049] Figure 7 This is a schematic diagram of the overall structure of a portable automatic calibration device for a vehicle brake dynamometer in Embodiment 2;

[0050] Figure 8 A schematic diagram of a scene of calibrating a pedal dynamometer in a clamping area of ​​a horizontal surface of a pedal dynamometer clamp in Embodiment 2;

[0051] Fig. 9 A schematic diagram of a scene of calibrating a pedal dynamometer in a 30° table clamping area of ​​a pedal dynamometer fixture in Example 2;

[0052] Fig.10 A schematic diagram of a scene of calibrating a hand dynamometer in Embodiment 2;

[0053] Fig.11 It is a schematic structural diagram of the pedal force meter fixture in the second embodiment at one viewing angle;

[0054] Fig.12 is a schematic structural diagram of the pedal force meter fixture in the second embodiment from another viewing angle;

[0055] Description of reference numerals:

[0056] 1. Base; 2. Electric cylinder support plate; 3. Servo electric cylinder; 4. Crossbeam; 5. Hand dynamometer fixture; 6. Tension sensor; 7. Pedal dynamometer fixture; 8. Pressure sensor; 9. Adjustment nut; 10. Support column; 11. Safety switch; 12. First adjustment screw; 13. Abutment; 14. Protective cover; 15. Handle; 16. Slide; 17. Device protection shell; 18. Display instrument; 19. Socket; 20. Threaded area; 21. Abutment bar; 22. Pedal dynamometer; 23. Slider; 24. Hand dynamometer; 25. Fixing belt; 26. Pin; 27. Upper fixture; 28. Lower fixture; 29. ​​Connecting block; 30. Second adjustment screw; 31. Rotating shaft; 32. Abutment wall; 33. Lower edge; 34. Through hole; 35. Inclined surface; 36. First screw hole; 37. Column. DETAILED DESCRIPTION

[0057] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0058] Embodiment 1

[0059] Please refer to Figures 1 to 6As shown, a portable automatic calibration device for a vehicle brake dynamometer comprises a base 1, a support column 10, a servo electric cylinder 3, an electric cylinder support plate 2, a crossbeam 4, a tension sensor 6, a hand dynamometer fixture 5, a pedal dynamometer fixture 7, a latch 26 and a pressure sensor 8;

[0060] The electric cylinder support plate 2 is fixed to both sides of the top surface of the base 1, the servo electric cylinder 3 is fixed to the top of the electric cylinder support plate 2 on both sides, the support column 10 is fixed to both sides of the top surface of the base 1, the crossbeam 4 is connected to the upper part of the support column 10 on both sides, and the height of the crossbeam 4 on the support column 10 is adjustable, the tension sensor 6 is arranged on the crossbeam 4, and the hand tension gauge fixture 5 is fixed to the bottom surface of the crossbeam 4;

[0061] The pedal force gauge clamp 7 is movably connected to the top surface of the base 1. The pedal force gauge clamp 7 can switch the clamping area of ​​the horizontal table surface and the clamping area of ​​the 30° table surface, and move the switched active area to below the output shaft of the servo electric cylinder 3. The pressure sensor 8 is arranged on the surface of the clamping area, and the clamping range of the clamping area is adjustable.

[0062] Among them, Figure 4 As shown, it also includes a latch 26;

[0063] The output shaft of the servo electric cylinder 3 is provided with a socket 19, one end of the pin 26 can be connected to the tail fixing belt 25 of the hand dynamometer 24, and the other end is inserted into the socket 19;

[0064] Among them, Figure 3 As shown, both sides of the top surface of the clamping area are provided with abutment members 13, and a first adjusting screw 12 is passed through the side wall of one of the abutment members 13. The design structure of the pedal dynamometer clamp 7 can refer to Figure 3 As shown, the adjusting screw is respectively arranged on the outer abutting members 13 of the two clamping areas. Of course, an abutting strip 21 can be designed at the end of the adjusting screw to increase the contact area with the pedal dynamometer 22 to ensure the abutting effect.

[0065] Among them, Figure 1 and Figure 3 As shown, a plurality of slide grooves 16 are provided at intervals on the surface of the base 1, and a slider 23 adapted to the slide groove 16 is provided at the bottom of the pedal dynamometer fixture 7; preferably, the shape of the slide groove 16 is designed to be a dovetail groove, and the cross-sectional shape of the slide groove 16 is correspondingly dovetail-shaped, so that the pedal dynamometer fixture 7 can move more stably on the surface of the base 1 and is not easy to fall off.

[0066] Among them, Figure 3 As shown, the surface of the pedal dynamometer clamp 7 is divided into a clamping area of ​​a horizontal table surface and a clamping area of ​​a 30° table surface at the front and back.

[0067] Among them, Figure 1 As shown, the electric cylinder support plate 2 is in an inverted L-shape, and the top end of the support column 10 is fixedly connected to the outwardly extending portion of the top of the electric cylinder support plate 2 .

[0068] Among them, Figure 1 As shown, it also includes an adjusting nut 9;

[0069] The upper portion of the support column 10 is provided with a threaded area 20 , the cross beam 4 is movably mounted on the support columns 10 on both sides, the adjusting nut 9 is screwed on the threaded area 20 on the upper portion of the support column 10 , and the adjusting nut 9 is abutted against the bottom surface of the cross beam 4 .

[0070] Among them, Figure 1 As shown, it also includes a display instrument 18;

[0071] The display instrument 18 is electrically connected to the pressure sensor 8 and the tension sensor 6 respectively.

[0072] Among them, Figure 1 As shown, it also includes a device protection shell 17;

[0073] The device protection housing 17 is fixedly connected to the upper rear portions of the electric cylinder support plates 2 on both sides.

[0074] Among them, Figure 2 As shown, it also includes a protective cover 14 and a safety switch 11;

[0075] The electric cylinder support plate 2 on one side is hinged to one side of the protective cover 14, and the safety switch 11 is provided on the support column 10 on the other side. The other side of the protective cover 14 is provided with a handle 15 and a safety lock adapted to the safety switch 11. The safety switch 11 is electrically connected to the servo electric cylinder 3. After the protective cover 14 is closed, the servo electric cylinder 3 is located within the covering range of the electric cylinder support plate 2 and the protective cover 14.

[0076] Embodiment 2

[0077] Please refer to Figures 7 to 12 As shown, a portable automatic calibration device for a vehicle brake dynamometer comprises a base 1, a support column 10, a servo electric cylinder 3, an electric cylinder support plate 2, a crossbeam 4, a tension sensor 6, a hand dynamometer fixture 5, a pedal dynamometer fixture 7 and a pressure sensor 8;

[0078] The electric cylinder support plate 2 is fixed to both sides of the top surface of the base 1, the servo electric cylinder 3 is fixed to the top of the electric cylinder support plate 2 on both sides, the support column 10 is fixed to both sides of the top surface of the base 1, the crossbeam 4 is connected to the upper part of the support column 10 on both sides, and the height of the crossbeam 4 on the support column 10 is adjustable, the tension sensor 6 is arranged on the crossbeam 4, and the hand tension gauge fixture 5 is fixed to the bottom surface of the crossbeam 4;

[0079] The pedal force gauge clamp 7 is movably connected to the top surface of the base 1. The pedal force gauge clamp 7 can switch the clamping area of ​​the horizontal table surface and the clamping area of ​​the 30° table surface, and move the switched active area to below the output shaft of the servo electric cylinder 3. The pressure sensor 8 is arranged on the surface of the clamping area, and the clamping range of the clamping area is adjustable.

[0080] Among them, Fig.12 As shown, it also includes a latch 26;

[0081] The output shaft of the servo electric cylinder 3 is provided with a socket 19, one end of the pin 26 can be connected to the tail fixing belt 25 of the hand dynamometer 24, and the other end is inserted into the socket 19;

[0082] Among them, Fig.11 As shown, both sides of the top surface of the clamping area are provided with abutting pieces 13 , and a first adjusting screw 12 is passed through a side wall of one of the abutting pieces 13 .

[0083] Among them, Fig.10 and Fig.11 As shown, a plurality of slide grooves 16 are provided at intervals on the surface of the base 1, and a slider 23 adapted to the slide groove 16 is provided at the bottom of the pedal dynamometer fixture 7; preferably, the shape of the slide groove 16 is designed to be a dovetail groove, and the cross-sectional shape of the slide groove 16 is correspondingly dovetail-shaped, so that the pedal dynamometer fixture 7 can move more stably on the surface of the base 1 and is not easy to fall off.

[0084] Among them, Fig.11 and Fig.12 As shown, the pedal dynamometer fixture 7 includes a lower fixture 28 and an upper fixture 27;

[0085] A column 37 is provided in the middle of the surface of the lower clamp 28, a connecting block 29 is provided on the bottom surface of the upper clamp 27, a rotating shaft 31 is provided between the connecting block 29 and the column 37, and the connecting block 29 can rotate on the column 37 through the rotating shaft 31, a 30° inclined surface 35 is provided on the front side of the surface of the lower clamp 28, and the front bottom surface of the upper clamp 27 can be rotated forward to fit with the front inclined surface 35 of the lower clamp 28, so that the inclined angle of the clamping area on the surface of the upper clamp 27 is 30°, a first screw hole 36 is provided on the inclined surface 35, and a through hole 34 matching the first screw hole 36 is provided on the front side of the surface of the upper clamp 27;

[0086] The rear surface of the lower clamp 28 is provided with a supporting wall 32, and the rear side of the upper clamp 27 is provided with a lower edge 33 extending downward. The rear bottom surface of the upper clamp 27 can be rotated backward to fit with the top surface of the supporting wall 32, so that the clamping area on the surface of the upper clamp 27 is in a horizontal state. At this time, the lower edge 33 of the rear side of the upper clamp 27 is located on the rear side of the supporting wall 32, and a second adjusting screw 30 is passed through the lower part of the lower edge 33, and a second screw hole matching the second adjusting screw 30 is provided on the supporting wall 32.

[0087] Among them, Figure 7 As shown, the electric cylinder support plate 2 is in an inverted L-shape, and the top end of the support column 10 is fixedly connected to the outwardly extending portion of the top of the electric cylinder support plate 2 .

[0088] Among them, Figure 7 As shown, it also includes an adjusting nut 9;

[0089] The upper portion of the support column 10 is provided with a threaded area 20 , the cross beam 4 is movably mounted on the support columns 10 on both sides, the adjusting nut 9 is screwed on the threaded area 20 on the upper portion of the support column 10 , and the adjusting nut 9 is abutted against the bottom surface of the cross beam 4 .

[0090] Among them, Figure 7 As shown, it also includes a display instrument 18;

[0091] The display instrument 18 is electrically connected to the pressure sensor 8 and the tension sensor 6 respectively.

[0092] Among them, Figure 7 As shown, it also includes a device protection shell 17;

[0093] The device protection housing 17 is fixedly connected to the upper rear portions of the electric cylinder support plates 2 on both sides.

[0094] Among them, Figure 8 As shown, it also includes a protective cover 14 and a safety switch 11;

[0095] The electric cylinder support plate 2 on one side is hinged to one side of the protective cover 14, and the safety switch 11 is provided on the support column 10 on the other side. The other side of the protective cover 14 is provided with a handle 15 and a safety lock adapted to the safety switch 11. The safety switch 11 is electrically connected to the servo electric cylinder 3. After the protective cover 14 is closed, the servo electric cylinder 3 is located within the covering range of the electric cylinder support plate 2 and the protective cover 14.

[0096] The working principle of the utility model is:

[0097] ① Pedal force meter calibration (horizontal platform clamping area)

[0098] Place the powered-on pedal dynamometer 22 in the horizontal surface clamping area of ​​the pedal dynamometer fixture 7, lock the pedal dynamometer 22 with the first adjusting screw 12, and move the horizontal surface clamping area to just below the output shaft of the servo electric cylinder 3 (such as Figure 4 As shown, if it is the pedal clamping force gauge fixture 7 in the first embodiment, the horizontal platform clamping area can be directly moved to the position directly below the output shaft of the servo electric cylinder 3, as shown in FIG. Figure 8 As shown, if it is the pedal clamping force gauge fixture 7 in Example 2, it is necessary to first switch its structure to the horizontal surface clamping area, and then move it to directly below the output shaft of the servo electric cylinder 3), close the protective cover 14, and after the safety switch 11 is turned on, the force value is loaded on the pedal force gauge 22 through the servo electric cylinder 3, and the data displayed by the pedal force gauge 22 and the sensing data of the pressure sensor 8 are recorded.

[0099] ② Pedal force gauge calibration (30° table clamping area)

[0100] After the power-on, the pedal dynamometer 22 is placed in the 30° table clamping area of ​​the pedal dynamometer fixture 7, and the pedal dynamometer 22 is locked with the first adjusting screw 12, and the 30° table clamping area is moved to the bottom of the output shaft of the servo electric cylinder 3 (as shown in FIG. Figure 5 As shown, if it is the pedal clamping force gauge fixture 7 in the first embodiment, the 30° table clamping area can be directly moved to the bottom of the output shaft of the servo electric cylinder 3, as shown in FIG. Fig. 9 As shown, if it is the pedal clamping force gauge fixture 7 in Example 2, it is necessary to first switch its structure to the 30° table clamping area, and then move it to directly below the output shaft of the servo electric cylinder 3), close the protective cover 14, and after the safety switch 11 is turned on, the force value is loaded on the pedal force gauge 22 through the servo electric cylinder 3, and the data displayed by the pedal force gauge 22 and the sensing data of the pressure sensor 8 are recorded.

[0101] ③Handbrake force gauge calibration

[0102] Reference Figure 6 and Fig.10As shown, the top of the hand dynamometer 24 after startup is hung on the hand dynamometer fixture 5, and the position of the hole of the fixing belt 25 at the tail of the hand dynamometer 24 is determined to be on the same horizontal plane as the position of the socket 19 of the servo electric cylinder 3 by adjusting the nut 9, and the pin 26 is passed through the hole of the fixing belt 25 and the socket 19 to realize the connection between the hand dynamometer 24 and the output shaft of the servo electric cylinder 3, and the protective cover 14 is closed. After the safety switch 11 is turned on, the force value is loaded on the hand dynamometer 24 through the servo electric cylinder 3, and the data displayed by the hand dynamometer 24 and the sensing data of the tension sensor 6 are recorded.

[0103] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A portable automatic calibration device for a vehicle brake dynamometer, characterized in that: It includes a base, a support column, a servo electric cylinder, an electric cylinder support plate, a crossbeam, a tension sensor, a hand tension gauge fixture, a pedal force gauge fixture and a pressure sensor; The electric cylinder support plate is fixed to both sides of the top surface of the base, the servo electric cylinder is fixed to the top of the electric cylinder support plates on both sides, the support column is fixed to both sides of the top surface of the base, the crossbeam is connected to the upper part of the support columns on both sides, and the height of the crossbeam on the support column is adjustable, the tension sensor is arranged on the crossbeam, and the hand tension gauge fixture is fixed to the bottom surface of the crossbeam; The pedal force gauge clamp is movably connected to the top surface of the base. The pedal force gauge clamp can switch the clamping area of ​​the horizontal table surface and the clamping area of ​​the 30° table surface, and move the switched active area to below the output shaft of the servo electric cylinder. The pressure sensor is arranged on the surface of the clamping area, and the clamping range of the clamping area is adjustable.

2. The portable automatic calibration device for a vehicle brake dynamometer according to claim 1, characterized in that: Both sides of the top surface of the clamping area are provided with abutment pieces, and a first adjusting screw is passed through the side wall of one of the abutment pieces.

3. The portable automatic calibration device for a vehicle brake dynamometer according to claim 1, characterized in that: A plurality of slide grooves are arranged at intervals on the surface of the base, and a sliding block adapted to the slide grooves is arranged at the bottom of the pedal dynamometer fixture.

4. The portable automatic calibration device for a vehicle brake dynamometer according to claim 1, characterized in that: The surface of the pedal dynamometer clamp is divided into a clamping area of ​​a horizontal table surface and a clamping area of ​​a 30° table surface at the front and back.

5. The portable automatic calibration device for a vehicle brake dynamometer according to claim 1, characterized in that: The pedal dynamometer fixture comprises a lower fixture and an upper fixture; A column is provided in the middle of the surface of the lower clamp, a connecting block is provided on the bottom surface of the upper clamp, a rotating shaft is provided between the connecting block and the column, the connecting block can rotate on the column through the rotating shaft, a 30° inclined surface is provided on the front side of the surface of the lower clamp, and the front bottom surface of the upper clamp can be rotated forward to fit with the front inclined surface of the lower clamp, so that the upper clamp claims The surface clamping area has an inclination angle of 30°, a first screw hole is provided on the inclined surface, and a through hole matching the first screw hole is provided on the front side of the surface of the upper clamp; The rear surface of the lower clamp is provided with a supporting wall, and the rear side of the upper clamp is provided with a lower edge extending downward. The rear bottom surface of the upper clamp can be rotated backward to fit with the top surface of the supporting wall, so that the clamping area of ​​the upper clamp surface is in a horizontal state. At this time, the lower edge of the rear side of the upper clamp is located on the rear side of the supporting wall, and a second adjusting screw is passed through the lower part of the lower edge, and a second screw hole matching the second adjusting screw is provided on the supporting wall.

6. The portable automatic calibration device for a vehicle brake dynamometer according to claim 1, characterized in that: The electric cylinder support plate is in an inverted L-shape, and the top end of the support column is fixedly connected to the outwardly extending portion of the top of the electric cylinder support plate.

7. The portable automatic calibration device for a vehicle brake dynamometer according to claim 1, characterized in that: Also included is an adjustment nut; The upper part of the support column is provided with a threaded area, the crossbeam is movably sleeved on the support columns at both sides, the adjusting nut is screwed on the threaded area on the upper part of the support column, and the adjusting nut is abutted against the bottom surface of the crossbeam.

8. The portable automatic calibration device for a vehicle brake dynamometer according to claim 1, characterized in that: Also includes display instrumentation; The display instrument is electrically connected to the pressure sensor and the tension sensor respectively.

9. The portable automatic calibration device for a vehicle brake dynamometer according to claim 1, characterized in that: Also included is a device protective housing; The device protection shell is fixedly connected to the upper rear parts of the electric cylinder support plates on both sides.

10. The portable automatic calibration device for a vehicle brake dynamometer according to claim 1, characterized in that: Also includes protective cover and safety switch; The electric cylinder support plate on one side is hinged to one side of the protective cover, the safety switch is provided on the support column on the other side, a handle and a safety lock adapted to the safety switch are provided on the other side of the protective cover, the safety switch is electrically connected to the servo electric cylinder, and when the protective cover is closed, the servo electric cylinder is located within the covering range of the electric cylinder support plate and the protective cover.

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