CN115266144A - Vehicle braking performance detection table and detection method - Google Patents
Vehicle braking performance detection table and detection method Download PDFInfo
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- CN115266144A CN115266144A CN202210941071.6A CN202210941071A CN115266144A CN 115266144 A CN115266144 A CN 115266144A CN 202210941071 A CN202210941071 A CN 202210941071A CN 115266144 A CN115266144 A CN 115266144A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/28—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for testing brakes
Abstract
The invention discloses a vehicle brake performance detection table which comprises a front detection unit, a rear detection unit and a controller. The invention also provides a vehicle braking performance detection method, the vehicle to be detected brakes, the wheel of the vehicle to be detected decelerates, the wheel of the vehicle to be detected applies the counterforce of the braking force to the braking drum, and the controller detects the braking force of the wheel of the vehicle to be detected. The vehicle braking performance detection platform and the detection method realize the detection of the consistency of the four-wheel braking force of the explosion-proof rubber-tyred vehicle, and also emphasize that the detection assembly is provided with the detection roller, and after the wheel of the vehicle to be detected is locked, the controller can detect the rotating speed difference between the detection roller and the wheel of the vehicle to be detected, so that the detection assembly is controlled to stop working, the wheel of the vehicle to be detected is prevented from being damaged by the brake roller, and the safety coefficient of the vehicle braking performance detection platform is improved.
Description
Technical Field
The invention relates to the technical field of underground coal mine operation equipment and peripheral supporting facilities thereof, in particular to a vehicle braking performance detection table and a detection method.
Background
The mining rubber-tyred vehicle is called an explosion-proof diesel engine trackless rubber-tyred vehicle and also called an explosion-proof rubber-tyred vehicle and is mainly used for underground coal mine roadway transportation operation. Due to the characteristics of narrow pavement, moisture, sludge, accumulated water, long ramp, poor lighting, sharp curve and the like of the underground roadway of the coal mine, accidents are easy to occur, the life safety of drivers, passengers and peripheral operators is directly threatened, and the safety performance of vehicles is directly influenced by the performance of a braking system. Therefore, the method is particularly important for detecting the braking performance of the mining anti-explosion rubber-tyred vehicle.
When the explosion-proof rubber-tyred vehicle runs and meets an obstacle and needs emergency braking, the vehicle not only needs to have enough braking force, but also needs the braking force consistency of the coaxial left and right wheels, and the braking force consistency of the four wheels of the front and rear shafts, such as: if the braking force of the front axle wheels of the vehicle is earlier than that of the rear axle wheels, or the difference between the braking forces of the left two wheels and the right two wheels at the same moment is too large, the situations of direction deviation, sideslip, side rollover and the like can occur, so that the vehicle is out of control in braking, and safety accidents are caused.
Therefore, the detection of the synchronism of the four-wheel brake of the whole vehicle is urgently required for safety operation, and the conventional anti-explosion rubber-tyred vehicle brake performance detection platform can only detect the left and right wheel brake force of a front axle or the left and right wheel brake force of a rear axle independently, so that the brake force consistency of the four wheels of the whole vehicle cannot be verified.
Therefore, how to solve the problem that the brake detection equipment of the explosion-proof rubber-tyred vehicle cannot verify the consistency of the braking force of the whole four wheels in the prior art becomes a problem to be solved by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide a vehicle braking performance detection table and a detection method, which are used for solving the problems in the prior art and realizing the detection of the consistency of four-wheel braking force of an explosion-proof rubber-tyred vehicle.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a vehicle brake performance detection table, comprising:
a front detection unit;
a rear detection unit;
the distance between the front detection unit and the rear detection unit can be adjusted, the front detection unit and the rear detection unit respectively comprise two groups of detection assemblies, and the connecting lines of the four groups of detection assemblies are rectangular;
the detection assembly comprises a machine frame, two groups of brake rollers and two groups of detection rollers, the brake rollers and the detection rollers are rotatably arranged on the machine frame, the axes of the brake rollers are parallel to the axes of the wheels of the vehicle to be detected, one group of the brake rollers is connected with a test motor and is in transmission connection with the other group of the brake rollers, and the two groups of the brake rollers are matched to support the wheels of the vehicle to be detected; the detection rollers are positioned between the two groups of brake rollers, the rotation axes of the detection rollers are parallel to the rotation axes of the brake rollers, and the detection rollers can be abutted against the wheels of the vehicle to be detected;
and the front detection unit and the rear detection unit are connected with the controller.
Preferably, the output end of the test motor is connected with the brake rollers by a speed reducer, and the two groups of brake rollers are in transmission connection by a chain wheel and a chain.
Preferably, the speed reducer is connected with a lever arm, and the lever arm is connected with a force sensor.
Preferably, the vehicle braking performance detection platform further comprises a wheel base adjusting unit, the rear detection unit is arranged on the wheel base adjusting unit, and the wheel base adjusting unit can drive the rear detection unit to slide in a reciprocating manner.
Preferably, the wheel base adjusting unit includes the adjustment frame, the quantity of adjustment frame is two sets of, back detecting element's two sets of detection subassembly with the adjustment frame one-to-one, be provided with the guide rail frame on the adjustment frame, detection subassembly is connected with the adjustment guide rail, the adjustment guide rail set up with slidable in on the guide rail frame.
Preferably, the wheel base adjusting unit is further connected with a locking mechanism, and the locking mechanism can fix the relative position of the rear detecting unit and the wheel base adjusting unit.
Preferably, the front detection unit and the rear detection unit are both provided with a lifter, the lifter can reciprocate along the vertical direction, and the lifter can lift an axle of a vehicle to be detected.
Preferably, a rotation speed sensor is connected to the detection drum.
Preferably, the detection drum is rotatably disposed on a mounting bracket slidably disposed on the chassis frame, and a reciprocating sliding direction of the mounting bracket is parallel to a vertical direction.
The invention also provides a vehicle braking performance detection method, which comprises the steps of adjusting the distance between the front detection unit and the rear detection unit by using the vehicle braking performance detection platform, driving a vehicle to be detected on the vehicle braking performance detection platform, arranging the wheel of the vehicle to be detected between two groups of brake rollers, driving the brake rollers to rotate by the test motor, driving the wheel of the vehicle to be detected to rotate by the brake rollers, driving the test rollers to rotate by the wheel of the vehicle to be detected, and obtaining the retarding force of the wheel of the vehicle to be detected by the controller when the linear velocity of the brake rollers is consistent with the linear velocity of the wheel of the vehicle to be detected; braking a vehicle to be detected, decelerating the wheel of the vehicle to be detected, applying a reaction force of a braking force to the brake drum by the wheel of the vehicle to be detected, and measuring the braking force of the wheel of the vehicle to be detected by the controller; and when the controller detects the rotation speed difference between the wheels of the vehicle to be detected and the test roller, the controller controls the detection assembly to stop working.
Compared with the prior art, the invention has the following technical effects: the vehicle braking performance detection table comprises a front detection unit, a rear detection unit and a controller, wherein the front detection unit and the rear detection unit are connected with the controller. The invention also provides a vehicle braking performance detection method, which comprises the steps of adjusting the distance between the front detection unit and the rear detection unit by utilizing the vehicle braking performance detection table, driving a vehicle to be detected onto the vehicle braking performance detection table, placing the wheel of the vehicle to be detected between the two groups of brake rollers, driving the brake rollers to rotate by the test motor, driving the wheel of the vehicle to be detected to rotate by the brake rollers, driving the test rollers to rotate by the wheel of the vehicle to be detected, and obtaining the retarding force of the wheel of the vehicle to be detected by the controller when the linear velocity of the brake rollers is consistent with that of the wheel of the vehicle to be detected; braking the vehicle to be detected, decelerating the wheel of the vehicle to be detected, applying a reaction force of braking force to the brake drum by the wheel of the vehicle to be detected, and measuring the braking force of the wheel of the vehicle to be detected by the controller; when the controller detects the rotation speed difference between the wheel of the vehicle to be detected and the testing roller, the controller controls the detection assembly to stop working.
The vehicle braking performance detection platform and the detection method realize the detection of the consistency of the four-wheel braking force of the explosion-proof rubber-tyred vehicle, and also emphasize that the detection assembly is provided with the detection roller, and after the wheel of the vehicle to be detected is locked, the controller can detect the rotating speed difference between the detection roller and the wheel of the vehicle to be detected, so that the detection assembly is controlled to stop working, the wheel of the vehicle to be detected is prevented from being damaged by the brake roller, and the safety coefficient of the vehicle braking performance detection platform is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic front view of a vehicle brake performance test stand according to the present invention;
FIG. 2 is a schematic top view of the vehicle braking performance test stand of the present invention in operation;
FIG. 3 is a rear view of the vehicle brake performance test stand of the present invention;
FIG. 4 is an axial view of the vehicle brake performance test stand of the present invention during operation;
FIG. 5 is an axial view of the vehicle brake performance test stand of the present invention;
FIG. 6 is a schematic view of the vehicle brake performance test stand of the present invention as it is embedded in the ground;
FIG. 7 is a schematic view of a portion of the detecting assembly of the vehicle brake performance detecting station of the present invention;
FIG. 8 is a schematic sectional view of the detecting assembly of the vehicle braking performance detecting table according to the present invention;
FIG. 9 is a schematic diagram of the lever arm and force sensor of the vehicle brake performance test stand of the present invention;
FIG. 10 is a schematic view of a portion of a vehicle brake performance test stand in accordance with the present invention;
FIG. 11 is a schematic front view of a wheel base adjustment unit of the vehicle brake performance test stand of the present invention;
FIG. 12 is a schematic top view of a wheel base adjustment unit of the vehicle braking performance testing stand of the present invention;
FIG. 13 is an axial schematic view of the wheel base adjustment unit of the vehicle brake performance testing stand of the present invention;
FIG. 14 is a conventional brake detection flow chart of the vehicle brake performance detection method of the present invention;
FIG. 15 is a long downhill braking detection flow chart of the vehicle braking performance detection method of the present invention;
fig. 16 is an operation schematic diagram of the vehicle braking performance detection method of the invention.
The device comprises a front detection unit 1, a rear detection unit 2, a detection assembly 3, a stand 4, a brake roller 5, a detection roller 6, a test motor 7, a speed reducer 8, a chain wheel and chain 9, a lever arm 10, a force sensor 11, a wheel base adjusting unit 12, an adjusting frame 13, a guide rail frame 14, an adjusting guide rail 15, a locking mechanism 16, a lifter 17 and a vehicle to be detected 18.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a vehicle braking performance detection table and a detection method, which are used for solving the problems in the prior art and realizing the detection of the consistency of four-wheel braking force of an explosion-proof rubber-tyred vehicle.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1 to 16, in which fig. 1 is a schematic front view of a vehicle braking performance testing table according to the present invention, fig. 2 is a schematic top view of the vehicle braking performance testing table according to the present invention, fig. 3 is a schematic rear view of the vehicle braking performance testing table according to the present invention, fig. 4 is a schematic axis view of the vehicle braking performance testing table according to the present invention, fig. 5 is a schematic axis view of the vehicle braking performance testing table according to the present invention, fig. 6 is a schematic view of the vehicle braking performance testing table according to the present invention when it is embedded in the ground, fig. 7 is a schematic partial structure view of a testing component of the vehicle braking performance testing table according to the present invention, fig. 8 is a schematic sectional structure view of the testing component of the vehicle braking performance testing table according to the present invention, fig. 9 is a schematic structural diagram of a lever arm and a force sensor of a vehicle brake performance testing platform according to the present invention, fig. 10 is a schematic structural diagram of a part of the vehicle brake performance testing platform according to the present invention, fig. 11 is a schematic front view of a wheel base adjusting unit of the vehicle brake performance testing platform according to the present invention, fig. 12 is a schematic top view of the wheel base adjusting unit of the vehicle brake performance testing platform according to the present invention, fig. 13 is a schematic axle view of the wheel base adjusting unit of the vehicle brake performance testing platform according to the present invention, fig. 14 is a conventional brake detection flowchart of a vehicle brake performance testing method according to the present invention, fig. 15 is a long downhill brake detection flowchart of the vehicle brake performance testing method according to the present invention, and fig. 16 is a working schematic diagram of the vehicle brake performance testing method according to the present invention.
The invention provides a vehicle brake performance detection platform, which comprises a front detection unit 1, a rear detection unit 2 and a controller, wherein the distance between the front detection unit 1 and the rear detection unit 2 can be adjusted, the front detection unit 1 and the rear detection unit 2 respectively comprise two groups of detection assemblies 3, and connecting lines of the four groups of detection assemblies 3 are rectangular; the detection assembly 3 comprises a machine frame 4, two brake rollers 5 and two detection rollers 6, wherein the brake rollers 5 and the detection rollers 6 are rotatably arranged on the machine frame 4, the axes of the brake rollers 5 are parallel to the axes of the wheels of the vehicle 18 to be detected, the number of the brake rollers 5 is two, one group of the brake rollers 5 is connected with a test motor 7 and is in transmission connection with the other group of the brake rollers 5, and the two groups of the brake rollers 5 are matched to support the wheels of the vehicle 18 to be detected; the detection roller 6 is positioned between the two groups of brake rollers 5, the rotation axis of the detection roller 6 is parallel to the rotation axis of the brake rollers 5, and the detection roller 6 can be abutted against the wheels of the vehicle 18 to be detected; the front detection unit 1 and the rear detection unit 2 are both connected with the controller.
When the vehicle brake performance detection table works, the distance between the front detection unit 1 and the rear detection unit 2 is adjusted, the vehicle 18 to be detected is driven to the vehicle brake performance detection table, the wheel of the vehicle 18 to be detected is placed between the two groups of brake rollers 5, the test motor 7 drives the brake rollers 5 to rotate, the brake rollers 5 drive the wheel of the vehicle 18 to be detected to rotate, the wheel of the vehicle 18 to be detected drives the test rollers to rotate, and when the linear speed of the brake rollers 5 is consistent with that of the wheel of the vehicle 18 to be detected, the controller obtains the retarding force of the wheel of the vehicle 18 to be detected; the vehicle 18 to be detected is braked, the wheels of the vehicle 18 to be detected are decelerated, the wheels of the vehicle 18 to be detected apply the reaction force of the braking force to the brake drum 5, and the controller measures the braking force of the wheels of the vehicle 18 to be detected; when the controller detects the difference of the rotation speed between the wheel of the vehicle 18 to be detected and the test drum, the controller controls the detection assembly 3 to stop working.
The vehicle braking performance detection table can be used for detecting the consistency of four-wheel braking force of an explosion-proof rubber-tyred vehicle, and the detection assembly 3 is provided with the detection roller 6, so that after wheels of the vehicle 18 to be detected are locked, a controller can detect the rotation speed difference between the detection roller 6 and the wheels of the vehicle 18 to be detected, the detection assembly 3 is controlled to stop working, the wheels of the vehicle 18 to be detected are prevented from being damaged by the brake roller 5, and the safety coefficient of the vehicle braking performance detection table is improved.
Wherein, the output of test motor 7 utilizes reduction gear 8 to link to each other with brake cylinder 5, and two sets of brake cylinder 5 utilize sprocket chain 9 transmission to link to each other, and a set of brake cylinder 5 that links to each other with test motor 7 is as initiative brake cylinder 5, and a set of brake cylinder 5 is as driven brake cylinder 5 in addition, and initiative brake cylinder 5 utilizes sprocket chain 9 to drive driven brake cylinder 5 and rotates.
In addition, a lever arm 10 is connected to the retarder 8, the lever arm 10 is connected to a force sensor 11, and the force sensor 11 is connected to the controller. The testing motor 7 and the speed reducer 8 have reliable strength and enough torque, the testing motor 7 drives the brake drum 5 through the speed reducer 8 so as to drive the wheel of the vehicle 18 to be detected to rotate, because the speed reducer 8 is supported on the shaft end of the drum extending out and the rear bearing in a floating way, when the wheel brakes, the counter force between the tire and the brake drum 5 enables the speed reducer 8 to swing, the braking force is converted into an electric signal through the lever arm 10 at the front end of the speed reducer 8 and the force sensor 11 arranged on the lever arm to output, after the braking force is processed by a computer, the testing motor 7 adopts closed-loop control of speed and torque through instrument display, and the testing motor 7 can select a servo motor so as to realize accurate control of constant speed and constant torque.
The vehicle braking performance detection platform further comprises a wheel base adjusting unit 12, the rear detection unit 2 is arranged on the wheel base adjusting unit 12, and the wheel base adjusting unit 12 can drive the rear detection unit 2 to slide back and forth so as to adjust the distance between the front detection unit 1 and the rear detection unit 2 and adapt to vehicles 18 to be detected with different wheel bases.
Specifically, wheel base adjusting unit 12 includes adjusting bracket 13, the quantity of adjusting bracket 13 is two sets of, two sets of determine module 3 and adjusting bracket 13 one-to-one of back detecting element 2, be provided with guide rail frame 14 on adjusting bracket 13, determine module 3 is connected with adjustment guide rail 15, adjustment guide rail 15 slidable ground sets up on guide rail frame 14, wheel base adjusting unit 12 sets up guide rail frame 14 and adjustment guide rail 15 between adjusting bracket 13 and determine module 3, the accuracy of back detecting element 2 reciprocating motion has been improved, in addition, adjusting bracket 13 and the determine module 3 one-to-one in the back detecting element 2, the accuracy of the wheel base adjustment of waiting to detect vehicle 18 has further been improved. In practical applications, the adjusting frame 13 may be disposed below the ground, for example, a foundation pit of the equipment is excavated on the ground, so that the vehicle 18 to be detected can conveniently drive onto the detection platform, and the adaptability of the device is improved.
In addition, the wheel base adjusting unit 12 is further connected with a locking mechanism 16, the locking mechanism 16 can fix the relative position of the rear detecting unit 2 and the wheel base adjusting unit 12, the position of the rear detecting unit 2 is fixed after adjustment, the stability of the device is improved, and a guarantee is provided for subsequent detection.
More specifically, the front detection unit 1 and the rear detection unit 2 are both provided with a lifter 17, the lifter 17 can reciprocate along the vertical direction, the lifter 17 can lift the axle of the vehicle 18 to be detected, after the vehicle 18 to be detected drives into the detection table, the vehicle 18 to be detected can be supported by the lifter 17, after the rear detection unit 2 is adjusted to a proper position, the lifter 17 descends, and the brake drum 5 bears the gravity of the vehicle 18 to be detected so as to perform detection.
In this embodiment, the detection drum 6 is connected to a rotation speed sensor to obtain a rotation speed of the detection drum 6, and when the wheel of the vehicle 18 to be detected is locked, the controller detects the rotation speed of the detection drum 6 and then controls the detection assembly 3 to stop working, so as to prevent the brake drum 5 from continuing to rotate to damage the wheel after the wheel is locked.
It should be noted that the detecting roller 6 is rotatably disposed on the mounting rack, the mounting rack is slidably disposed on the chassis frame 4, the reciprocating sliding direction of the mounting rack is parallel to the vertical direction, and the height of the mounting rack is adjusted to enable the detecting roller 6 to abut against the wheels, so that the wheels drive the detecting roller 6 to rotate, the height of the detecting roller 6 is adjustable to adapt to wheels with different diameters, and the working reliability of the device is improved.
The invention also provides a vehicle braking performance detection method, which comprises the steps of cleaning the wheels of the detected vehicle, removing foreign matters such as stones in the patterns of the wheels, checking whether the abrasion condition of the wheels is qualified or not, turning on a controller, clicking to start detection after inputting the technical parameters such as the type of the vehicle and the like by using the vehicle braking performance detection table, and displaying by a lamp screen: "wheelbase is being adjusted, please wait! "the driver should be careful waiting. The rear detection unit 2 finishes moving, the wheel base is adjusted in place, and the lamp screen displays: "please go to the upper stage for detection". At this time, a driver drives a vehicle to center a guide line according to the direction of a guide arrow, slowly drives the vehicle to the detection platform, stops the front wheels on the front detection unit 1, places the wheels between the two groups of brake rollers 5, stops the rear wheels on the rear detection unit 2, places the wheels between the two groups of brake rollers 5, and automatically falls down the lifters 17 of the front detection unit 1 and the rear detection unit 2 after the vehicle is stopped stably, and the two groups of brake rollers 5 in each group of detection assemblies 3 support the wheels. Displaying on a lamp screen: "please release the brake pedal". The controller controls 4 detection motors through a circuit, the rotating speed is increased slowly from 0, 4 wheels are driven to rotate through a speed reducer 8 and two groups of brake rollers 5, each detection motor of the 4 detection motors has respective closed-loop following control, the actual running state of all the detection motors is fed back to the upper computer through a unified information interface, the upper computer issues user instructions to each detection motor on one hand, on the other hand, the obtained feedback information is utilized, corresponding synchronous compensation quantity is output to each detection motor through the matching of a synchronous control structure and an algorithm, and therefore the purpose of eliminating the rotating speed difference among the detection motors or keeping the accurate rotating speed ratio is achieved.
After the rotating speed of the wheels is increased to 2km/h and stabilized, the linear speed of the brake drum 5 is consistent with that of the tire, and at the moment, the controller automatically measures the retarding force of each wheel. After the retardation measurement is finished, the lamp screen displays 'please press the brake according to the prompt', '5, 4, 3, 2, 1', 'the brake pedal is pressed'. When a driver steps on a brake pedal, the wheel starts to rotate in a decelerating way under the action of torque generated by a brake, and the brake roller 5 acts braking force on the tangential direction of the periphery of the wheel tire under the driving of the speed reducing motor and the speed reducer 8 so as to overcome the braking friction torque and maintain the wheel to rotate continuously. Meanwhile, the tire of the wheel adds a reaction force with the value opposite to the braking force to the tangential direction of the surface of the drum, and under the reaction moment formed by the reaction force, the force sensor 11 outputs an electric signal proportional to the braking force, so that the braking force of the wheel is measured. In this process, the controller may also record the maximum braking force, the sum of coaxial braking forces, the difference between the coaxial braking forces, the sum of left and right braking forces, the difference between left and right braking forces, and the like of the front, rear, left and right 4 wheels together with time. (the software system can also analyze the deviation and standard comparison analysis of the brake force consistency of the left wheel, the right wheel, the front wheel, the rear wheel and the front shaft) next, the driver tests the hand brake force and relevant tests according to the prompt of the light screen, after finishing, the lifter 17 lifts, and the light screen prompts: if the driver is to go forward, the driver leaves the vehicle from the detection platform, and the detection is finished.
And (3) long-distance downhill braking detection: and (3) driving the vehicle on the detection table according to the method, after the vehicle is started, engaging the gearbox in neutral, enabling the detection motor to rotate according to the set rotating speed, keeping the rotating speed of the brake roller 5 stable at the set speed, and enabling the brake roller 5 to drive the wheels to rotate. The proportional pressure regulating valve is added in the braking system, so that the braking force of the brake is balanced with the gliding force of the vehicle on a slope, and the braking force detection and research of the long downhill slope of the vehicle are met under the state of continuous operation. The method comprises the steps of simulating various working conditions of a long downhill test of the vehicle, measuring the braking force of front and rear wheels of the vehicle and the temperature of a hub, analyzing the braking performance of the vehicle, researching and improving various condition data analysis (setting different slopes, identifying the component force of the gravity of the vehicle along a broken surface by using a database, setting the torque of a servo motor, performing the downhill test, emphasizing the gradient, the slope length and the heating of a braking system, predicting failure and analyzing and judging). The judgment of the braking force comprises real-time performance of coordination time of each wheel, a ratio of the coordination time to a single shaft weight, a ratio of front and back weights, and a ratio of left and right weights.
The test bench for simultaneously detecting the four-wheel braking performance of the explosion-proof rubber-tyred vehicle is designed according to the use limitation of the test bench for the braking performance of the explosion-proof rubber-tyred vehicle, can realize the simultaneous detection of the four-wheel braking force, can simulate a long downhill, realizes multiple purposes by one machine, and enlarges the use range.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the foregoing, the description is not to be taken in a limiting sense.
Claims (10)
1. A vehicle braking performance detection station, comprising:
a front detection unit;
a rear detection unit;
the distance between the front detection unit and the rear detection unit can be adjusted, the front detection unit and the rear detection unit respectively comprise two groups of detection assemblies, and the connecting lines of the four groups of detection assemblies are rectangular;
the detection assembly comprises a machine frame, two groups of brake rollers and two groups of detection rollers, the brake rollers and the detection rollers are rotatably arranged on the machine frame, the axes of the brake rollers are parallel to the axes of the wheels of the vehicle to be detected, one group of the brake rollers is connected with a test motor and is in transmission connection with the other group of the brake rollers, and the two groups of the brake rollers are matched to support the wheels of the vehicle to be detected; the detection rollers are positioned between the two groups of brake rollers, the rotation axes of the detection rollers are parallel to the rotation axes of the brake rollers, and the detection rollers can be abutted against the wheels of the vehicle to be detected;
and the front detection unit and the rear detection unit are connected with the controller.
2. The vehicle braking performance detection station according to claim 1, characterized in that: the output end of the test motor is connected with the brake rollers by a speed reducer, and the two groups of brake rollers are connected by chain wheel and chain transmission.
3. The vehicle braking performance detection station according to claim 2, characterized in that: the speed reducer is connected with a lever arm, and the lever arm is connected with a force sensor.
4. The vehicle brake performance test stand according to claim 1, characterized in that: the rear detection unit is arranged on the wheel base adjusting unit, and the wheel base adjusting unit can drive the rear detection unit to slide in a reciprocating mode.
5. The vehicle brake performance test stand according to claim 4, characterized in that: the wheel base adjustment unit includes the adjustment frame, the quantity of adjustment frame is two sets of, back detecting element is two sets of detecting element with the adjustment frame one-to-one, be provided with the guide rail frame on the adjustment frame, detecting element is connected with the adjustment guide rail, adjustment guide rail slidable set up in on the guide rail frame.
6. The vehicle braking performance test stand according to claim 4, characterized in that: the wheel base adjusting unit is further connected with a locking mechanism, and the locking mechanism can fix the relative position of the rear detecting unit and the wheel base adjusting unit.
7. The vehicle brake performance test stand according to claim 1, characterized in that: the front detection unit and the rear detection unit are both provided with lifters, the lifters can reciprocate in the vertical direction, and the lifters can lift axles of the vehicle to be detected.
8. The vehicle braking performance detection station according to claim 1, characterized in that: the detection roller is connected with a rotating speed sensor.
9. The vehicle brake performance test stand according to claim 1, characterized in that: the detection roller is rotatably arranged on a mounting rack, the mounting rack is slidably arranged on the machine frame, and the reciprocating sliding direction of the mounting rack is parallel to the vertical direction.
10. A vehicle braking performance detection method using the vehicle braking performance detection platform according to any one of claims 1 to 9, characterized in that: adjusting the distance between the front detection unit and the rear detection unit, driving a vehicle to be detected on the vehicle braking performance detection table, placing a wheel of the vehicle to be detected between two groups of brake rollers, driving the brake rollers to rotate by the test motor, driving the wheel of the vehicle to be detected to rotate by the brake rollers, driving the test rollers to rotate by the wheel of the vehicle to be detected, and obtaining the retarding force of the wheel of the vehicle to be detected by the controller when the linear velocity of the brake rollers is consistent with that of the wheel of the vehicle to be detected; braking a vehicle to be detected, wherein the wheel of the vehicle to be detected decelerates, the wheel of the vehicle to be detected applies a reaction force of braking force to the brake drum, and the controller measures the braking force of the wheel of the vehicle to be detected; and when the controller detects the rotation speed difference between the wheels of the vehicle to be detected and the test roller, the controller controls the detection assembly to stop working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210941071.6A CN115266144A (en) | 2022-08-08 | 2022-08-08 | Vehicle braking performance detection table and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210941071.6A CN115266144A (en) | 2022-08-08 | 2022-08-08 | Vehicle braking performance detection table and detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115266144A true CN115266144A (en) | 2022-11-01 |
Family
ID=83748810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210941071.6A Pending CN115266144A (en) | 2022-08-08 | 2022-08-08 | Vehicle braking performance detection table and detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115266144A (en) |
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2022
- 2022-08-08 CN CN202210941071.6A patent/CN115266144A/en active Pending
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