CN217006303U - Brake system rack endurance test device - Google Patents
Brake system rack endurance test device Download PDFInfo
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- CN217006303U CN217006303U CN202121466079.9U CN202121466079U CN217006303U CN 217006303 U CN217006303 U CN 217006303U CN 202121466079 U CN202121466079 U CN 202121466079U CN 217006303 U CN217006303 U CN 217006303U
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Abstract
The utility model relates to a brake system rack endurance test device, which comprises a brake test sample piece, an air cylinder, an equipment rack and a clamp, wherein the brake test sample piece comprises a front brake, a vehicle body, a brake pedal, a brake hose, a brake hard pipe, a brake pipe, a booster with a main cylinder assembly, an ESC (electronic stability control) and a rear brake; compared with the prior art, the utility model utilizes the air cylinder to apply force to the brake pedal to simulate the treading of a man-machine real vehicle, and can carry out preliminary judgment and rapid inspection on the whole set of brake system before the whole vehicle road test.
Description
[ technical field ]
The utility model relates to the technical field of automobile manufacturing, in particular to a brake system rack endurance test device.
[ background art ]
The development test verification modes of the passenger car mainly comprise the following three modes: part bench test, system bench test and finished automobile test. The brake system is used as an important safety part and is very important for the bench verification for ensuring the safety and reliability of the whole vehicle experiment. At present, there are relatively popular bench durability tests including: the test method comprises a pedal endurance test, a vacuum booster belt master cylinder assembly endurance test, a knuckle fatigue endurance test, a brake hose bending fatigue test and the like. Through the part bench tests, the strength fatigue of the part structure can be well verified, but the problems of brake fluid leakage or torque attenuation of a brake system in the real vehicle movement process cannot be simulated.
Because the braking system is extremely complex, the parts of the braking system are widely distributed in the whole vehicle, and the parts of the braking system can be arranged in a cabin, a floor, a wheel end and a passenger cabin, if the whole vehicle experiment is directly verified, the braking system has the complexity problems of brake fluid leakage or inconsistent pedal feeling with the design state, and the like, and the problems in the braking system are difficult to detect.
[ contents of utility model ]
The utility model aims to solve the defects and provide a brake system rack endurance test device, which utilizes an air cylinder to apply force to a brake pedal to simulate stepping on a man-machine real vehicle and can preliminarily judge and quickly check the whole set of brake system before a whole vehicle road test.
Design a braking system rack endurance test device for realizing above-mentioned purpose, including braking test sample spare, cylinder 2, equipment rack 3 and anchor clamps 4, braking test sample spare includes preceding stopper 1, automobile body 7, brake pedal 8, brake hose 11, braking hard tube 13, brake pipe 15, booster area master cylinder assembly 18, ESC 19 and back brake 20, brake pedal 8 installs in automobile body 7 front side with booster area master cylinder assembly 18, ESC 19 installs on automobile body 7 longeron, preceding stopper 1, back brake 20 are connected with braking hard tube 13 through brake hose 11 respectively, braking hard tube 13 is connected with ESC 19, ESC 19 is connected through brake pipe 15 with booster area master cylinder assembly 18, equipment rack 3 carries on automobile body 7 rear portion and fixes on automobile body 7, install cylinder 2 on the equipment rack 3, the cylinder 2 tilting is arranged, the directional front lower side of the flexible end of cylinder 2, the bulb of cylinder 2 passes through anchor clamps 4 to be connected on brake pedal 8, it steps on point 5 to have the man-machine in advance on brake pedal 8, and the bulb of cylinder 2 aims at man-machine and steps on point 5, cylinder 2 tramples in order to simulate man-machine real vehicle to brake pedal 8 application of force, brake test sample piece, cylinder 2, equipment rack 3 are arranged in temperature box 9.
Furthermore, the front brake 1 and the rear brake 20 are respectively connected with a brake hose 11 through a brake hose mounting bolt 10, the brake hose 11 is connected with a brake hard tube 13 through a brake hard tube mounting bolt one 12, and the brake hard tube 13 is connected with the ESC 19 through a brake hard tube mounting bolt two 17.
Further, the brake pipe 15 connects the booster band master cylinder assembly 18 with the ESC 19 through the second brake pipe mounting bolt 17 and the brake pipe master cylinder mounting bolt 16.
Compared with the prior art, the man-machine point of the brake pedal is determined before installation through the installation of the air cylinder and the rack equipment, the air cylinder is used for applying force to the brake pedal to simulate the trampling of a man-machine real vehicle, the device and the method are used for carrying the endurance test rack before the whole vehicle road test, the primary judgment of the building pressure capacity, the system tightness, the fatigue strength of a front panel of a brake part and a connecting piece thereof, the static pedal feeling, the rationality of the torque setting of a fastener of the brake system and the influence of temperature on the liquid demand and a structural part are facilitated, and if the brake fails in the endurance test process, the device and the method are beneficial to the rapid inspection and solve the problems before the whole vehicle test is carried.
[ description of the drawings ]
FIG. 1 is an assembly schematic of the present invention;
FIG. 2 is a schematic view of the brake pedal installation of the present invention;
FIG. 3 is a schematic view of the installation of the booster with master cylinder assembly, ESC, brake line, etc. of the present invention;
FIG. 4 is a schematic view of the brake and brake pipe installation of the present invention;
FIG. 5 is a schematic view of the mounting of the inventive gantry apparatus;
FIG. 6 is a connection circuit of an experimental sample of the braking system of the present invention;
in the figure: 1. the brake system comprises a front brake 2, a cylinder 3, an equipment rack 4, a clamp 5, a man-machine treading point 6, a man-machine H point 7, a vehicle body 8, a brake pedal 9, a temperature box 10, a brake hose mounting bolt 11, a brake hose 12, a brake hard pipe mounting bolt 13, a brake hard pipe 14, a mounting nut 15, a brake pipe 16, a brake pipe main cylinder mounting bolt 17, a brake hard pipe mounting bolt 18, a booster band main cylinder assembly 19, an ESC 20 and a rear brake.
[ detailed description of the utility model ]
The utility model is further described below with reference to the accompanying drawings:
the utility model provides a brake system rack endurance test device which comprises a brake test sample piece, a cylinder 2, an equipment rack 3 and a clamp 4, wherein the brake test sample piece comprises a front brake 1, a vehicle body 7, a brake pedal 8, a brake hose mounting bolt 10, a brake hose 11 and a brake hard pipe mounting bolt I12, the brake device comprises a brake hard pipe 13, a mounting nut 14, a brake pipe 15, a brake pipe main cylinder mounting bolt 16, a brake hard pipe mounting bolt II 17, a booster belt main cylinder assembly 18, an ESC 19 and a rear brake 20, wherein a brake pedal 8 and the booster belt main cylinder assembly 18 are mounted on the front side of a vehicle body 7, the ESC 19 is mounted on a vehicle body longitudinal beam, the front brake 1 and the rear brake 20 are respectively connected with the brake hard pipe 13 through a brake hose 11, the brake hard pipe 13 is connected with the ESC 19, and the ESC 19 is connected with the booster belt main cylinder assembly 18 through the brake pipe 15; specifically, a front brake 1 and a rear brake 20 are respectively connected with a brake hose 11 through a brake hose mounting bolt 10, the brake hose 11 is connected with a brake hard tube 13 through a brake hard tube mounting bolt one 12, the brake hard tube 13 is connected with an ESC 19 through a brake hard tube mounting bolt two 17, and the brake tube 5 connects a booster master cylinder assembly 18 with the ESC 19 through the brake hard tube mounting bolt two 17 and a brake tube master cylinder mounting bolt 16, so as to finally form a brake hydraulic circuit (as shown in fig. 6); equipment rack 3 carries on at automobile body 7 rear portion and fixes on automobile body 7, equipment rack 3 installs cylinder 2, the 2 tilting of cylinder are arranged, the directional front lower place of flexible end of cylinder 2, the bulb of cylinder 2 passes through anchor clamps 4 to be connected on brake pedal 8, human-machine pedal point 5 has been preset on brake pedal 8, and the bulb of cylinder 2 is aimed at human-machine pedal point 5, cylinder 2 tramples in order to simulate human-machine real vehicle to brake pedal 8 application of force, braking test sample spare, cylinder 2, equipment rack 3 arranges in temperature box 9.
As shown in the attached figure 1, the brake system bench endurance test device comprises the following components: temperature box, white automobile body, equipment frock rack, cylinder and host computer, braking system experiment appearance piece.
As shown in the attached drawings 2 to 4, for the assembly of each test part, the assembly mode is the same as that of the whole vehicle, the tightening torque of the fastener is tightened by a torque wrench according to the design requirement, and the torque is recorded.
As shown in figure 5, for installation of the air cylinder and the rack device, a man-machine point of a brake pedal needs to be determined before installation, and the air cylinder applies force to the brake pedal to simulate stepping of a real man-machine vehicle.
The test steps of the utility model are as follows:
1. installation: the whole set of brake system is connected and carried on a white vehicle body, a fastener is tightened by a torque wrench according to set torque and carries out torque recording, then the test equipment is carried on the white vehicle body and is fixed, the air cylinder confirms the force application point and the force application direction according to the man-machine stepping point and the H point, and after the test equipment is installed, the man-machine point is confirmed and recorded by the infrared three-coordinate measuring instrument. And finally, placing the whole set of system into a temperature box, wherein the temperature range of the temperature box is required to be as follows: -35 ℃ to 80 ℃.
2. Equipment debugging: the main machine program of the air cylinder is set, the force is applied for 250N, the frequency is 0.1-0.4Hz, the times are 100, and the main machine acquires a pedal force VS pedal stroke curve, if a test curve is close to a whole vehicle pedal feeling curve and the pedal force is stable and has no noise or vibration in the test process, the debugging is finished. After completing 250N debugging, 500N, 1600N and 2000N are debugged in the same way.
3. The test method comprises the following steps:
the following table 1 shows the temperature, force, and treading frequency distribution for one cycle, and the test was run for a total of 4 cycles as follows. The force application size, the temperature range and the cycle times of different main airports can be automatically adjusted according to requirements.
TABLE 1 temperature distribution Range
4. And (4) checking after testing:
(1) checking whether brake fluid leaks from the brake system or not, and whether parts and a body in white are obviously damaged or not;
(2) checking the torque of the fastener after the test, and judging the torque attenuation;
(3) comparing pedal curve graphs in the test process to determine whether the pedal stroke is obviously changed or not, wherein the influence of temperature on the liquid demand of the brake system can be seen through stroke comparison under the same force application condition and different temperatures, and whether the brake system and the vehicle body are yielding or not can be determined through comparison of pedal stroke curves in the front section and the rear section of the test under the same force application condition and the same temperature;
(4) measuring man-machine points by using an infrared three-coordinate measuring instrument, and judging the plastic deformation of a brake pedal and a white vehicle body;
(5) and (4) disassembling and analyzing the brake pedal and the booster, and confirming whether the parts are internally worn, cracked and the like.
When the method is implemented, firstly carrying out actual project rack equipment, carrying a brake system and experimental equipment on a white vehicle body, and then putting the white vehicle body and the experimental equipment into a temperature cabin; tightening and detecting fasteners, tightening all the fasteners by using a torque wrench according to the designed torque, and detecting the torque decline by using the torque wrench after the test is finished; measuring a man-machine point by using an infrared three-coordinate measuring instrument, making a three-coordinate positioning record between a force application point of an air cylinder and the man-machine point H before the test, and confirming whether the man-machine point changes or not again after the test is finished; the static pedal feeling curve displayed by the equipment host is checked, test data need to be reserved in the whole process of equipment debugging and testing, one is used as a basis for successful equipment debugging, and in addition, dynamic change of a braking system in the testing process is reflected.
Through the practical experiment process, the problems of the brake system can be found, such as: the brake system has the advantages that pedal pin shafts are seriously abraded, the pedal torque is attenuated, pipelines between the booster and the ESC in the engine room are difficult to install, the booster shakes and makes abnormal sound after a durability test, brake fluid is blackened after the durability test and the like, and the brake system is fully verified for the design of the brake system.
The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.
Claims (3)
1. The utility model provides a brake system rack endurance test device which characterized in that: including braking test sample, cylinder (2), equipment rack (3) and anchor clamps (4), braking test sample includes preceding brake (1), automobile body (7), brake pedal (8), brake hose (11), braking hard tube (13), brake pipe (15), booster area master cylinder assembly (18), ESC (19) and back brake (20), install automobile body (7) front side with booster area master cylinder assembly (18) brake pedal (8), ESC (19) are installed on automobile body (7) longeron, preceding brake (1), back brake (20) are connected with braking hard tube (13) through brake hose (11) respectively, braking hard tube (13) are connected with ESC (19), ESC (19) are connected through brake pipe (15) with booster area master cylinder assembly (18), equipment rack (3) are carried on automobile body (7) rear portion and are fixed on automobile body (7), install cylinder (2) on equipment rack (3), cylinder (2) tilting is arranged, the directional front lower place of flexible end of cylinder (2), the bulb of cylinder (2) passes through anchor clamps (4) and connects on brake pedal (8), it steps on some 5 to have the man-machine in advance on brake pedal (8), and the bulb of cylinder (2) aims at man-machine and steps on some 5, cylinder (2) are stepped on in order to simulate real-man car to brake pedal (8) application of force, braking test sample piece, cylinder (2), equipment rack (3) are arranged in temperature box 9.
2. The brake system bench endurance testing apparatus of claim 1, further comprising: the front brake (1) and the rear brake (20) are respectively connected with a brake hose (11) through brake hose mounting bolts (10), the brake hose (11) is connected with a brake hard tube (13) through a brake hard tube mounting bolt I (12), and the brake hard tube (13) is connected with an ESC (19) through a brake hard tube mounting bolt II (17).
3. The brake system bench endurance testing apparatus of claim 2, wherein: the brake pipe (15) connects the booster belt main cylinder assembly (18) with the ESC (19) through a second brake hard pipe mounting bolt (17) and a brake pipe main cylinder mounting bolt (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121466079.9U CN217006303U (en) | 2021-06-29 | 2021-06-29 | Brake system rack endurance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121466079.9U CN217006303U (en) | 2021-06-29 | 2021-06-29 | Brake system rack endurance test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217006303U true CN217006303U (en) | 2022-07-19 |
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ID=82366208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121466079.9U Active CN217006303U (en) | 2021-06-29 | 2021-06-29 | Brake system rack endurance test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217006303U (en) |
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2021
- 2021-06-29 CN CN202121466079.9U patent/CN217006303U/en active Active
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