CN114689340B - MacPherson strut front suspension assembly braking test apparatus and test method - Google Patents
MacPherson strut front suspension assembly braking test apparatus and test methodInfo
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- CN114689340B CN114689340B CN202210321761.1A CN202210321761A CN114689340B CN 114689340 B CN114689340 B CN 114689340B CN 202210321761 A CN202210321761 A CN 202210321761A CN 114689340 B CN114689340 B CN 114689340B
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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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Abstract
本发明提供了一种麦弗逊式前置悬架总成制动试验装置及其试验方法，所述麦弗逊式前置悬架总成制动试验装置包括待测样品部分、惯量台主轴、电动缸装载总成、试验夹具电动缸固定总装和试验夹具样品总装，所述待测样品部分的第一端部与所述惯量台主轴连接，第二端部与所述电动缸装载总成连接，第三端部与所述试验夹具样品总装连接，所述试验夹具电动缸固定总装安装在所述试验夹具样品总装上，且所述电动缸装载总成固定在所述试验夹具电动缸固定总装上。本发明拟定了结合1/4前悬制动总成和转向横拉杆试验装置，装置设计时拟定实车姿态，设计简单，制造便利，安装方便，试验方法可单独考核制动工况下麦弗逊式前悬架角总成的制动疲劳强度。
This invention provides a MacPherson strut front suspension assembly braking test device and its test method. The MacPherson strut front suspension assembly braking test device includes a test sample part, an inertia table spindle, an electric cylinder loading assembly, a test fixture electric cylinder fixing assembly, and a test fixture sample assembly. The first end of the test sample part is connected to the inertia table spindle, the second end is connected to the electric cylinder loading assembly, and the third end is connected to the test fixture sample assembly. The test fixture electric cylinder fixing assembly is mounted on the test fixture sample assembly, and the electric cylinder loading assembly is fixed on the test fixture electric cylinder fixing assembly. This invention proposes a test device combining a 1/4 front suspension braking assembly and a steering tie rod. The device is designed based on the actual vehicle posture, is simple in design, convenient to manufacture, and easy to install. The test method can independently assess the braking fatigue strength of the MacPherson strut front suspension assembly under braking conditions.
Description
Technical Field
The invention relates to the field of brake test devices, in particular to a McPherson front suspension assembly brake test device and a test method thereof.
Background
To better simulate the real vehicle state, noise, vibration or other performance tests of a main engine factory during simulated braking are adopted to replace a braking device consisting of only a disc/drum type and calipers by a front suspension braking angle assembly (system level) braking test (shown in fig. 1). The Macpherson front suspension braking angle assembly (1/4 front suspension braking assembly) is provided with a steering knuckle in a braking test, and a tie rod is arranged on a fixed clamp, so that working condition experiments such as high-speed braking, low-speed braking, continuous braking or alternation are simulated by means of a braking test bed device.
The conventional brake test can indirectly simulate the real vehicle to examine the brake performance, and has the defect that the steering pull rod is arranged at the clamp end to be fixed and is not in a real vehicle state.
In view of the above, the present inventors devised a macpherson front suspension assembly brake test device and a test method thereof, so as to overcome the above-mentioned technical problems.
Disclosure of Invention
The invention aims to overcome the defect that a steering pull rod in a front suspension braking angle assembly is arranged at the end of a clamp and fixed in a state other than a real vehicle in the prior art, and provides a McPherson type front suspension assembly braking test device and a McPherson type front suspension assembly braking test method.
The invention solves the technical problems by the following technical proposal:
The Macpherson front suspension assembly braking test device is characterized by comprising a sample part to be tested, an inertia table main shaft, an electric cylinder loading assembly, a test clamp electric cylinder fixing assembly and a test clamp sample assembly, wherein a first end part of the sample part to be tested is connected with the inertia table main shaft, a second end part of the sample part to be tested is connected with the electric cylinder loading assembly, a third end part of the sample part to be tested is connected with the test clamp sample assembly, the test clamp electric cylinder fixing assembly is installed on the test clamp sample assembly, and the electric cylinder loading assembly is fixed on the test clamp electric cylinder fixing assembly.
According to one embodiment of the invention, the sample portion to be tested comprises a Macpherson front suspension brake angle assembly, a transverse pull rod, a lock nut and a rod end bearing, wherein one end portion of the transverse pull rod is connected with the lower portion of the Macpherson front suspension brake angle assembly, and one end portion of the rod end bearing is connected with the other end portion of the transverse pull rod through the lock nut.
According to one embodiment of the invention, the inertia table spindle comprises a brake test table driving portion, a coupling and a bolt-nut connection mechanism, wherein one end portion of the coupling is connected with a universal joint of the brake test table driving portion through the bolt-nut connection mechanism.
According to one embodiment of the invention, the electric cylinder loading assembly comprises an electric cylinder, a switching rod and a rod end bearing clamping block which are sequentially connected, wherein the rod end bearing clamping block is connected with the other end portion of the rod end bearing through a connecting pin.
According to one embodiment of the invention, the test fixture electric cylinder fixing assembly comprises a control arm fixing plate, an electric cylinder stabilizing frame, a pressing plate bolt and an actuator bolt, wherein the electric cylinder stabilizing frame is fixed at the upper end part of the control arm fixing plate through a plurality of pressing plate bolts, so that a mounting hole is formed between the electric cylinder stabilizing frame and the control arm fixing plate;
the switching rod is arranged in the mounting hole in a penetrating mode, and the electric cylinder is connected with the control arm fixing plate and the electric cylinder stabilizing frame through the actuator bolt.
According to one embodiment of the invention, the test fixture sample assembly includes a suspension mounting base frame and an adjustable shock absorber mounting bracket mounted to one side of the suspension mounting base frame, a third portion of the sample portion to be tested is connected to the top of the suspension mounting base frame, and the control arm mounting plate is mounted to the suspension mounting base frame between the suspension mounting base frame and the adjustable shock absorber mounting bracket.
The invention also provides a test method of the McPherson type front suspension assembly braking test device, which is characterized in that the McPherson type front suspension assembly braking test device is adopted in the test method, when the test method evaluates the fatigue strength of the McPherson type front suspension braking angle assembly under the steering working condition, the braking test table only rotates at a constant speed and does not work as the braking working condition, the electric cylinder simulates the steering working condition, and constant amplitude alternating cyclic load with fixed amplitude or random load simulating a road load spectrum is loaded.
According to one embodiment of the invention, the test method comprises the steps of:
S 1, collecting a strain signal of the transverse pull rod through a strain gauge in a road test of a test field of a real vehicle;
S 2, considering a road spectrum signal transmitted to the Macpherson front suspension and brake angle assembly, namely a road analog signal, which is a general force signal, of a steering tie rod during actual running of a vehicle in a fatigue strength test of the Macpherson front suspension and brake angle assembly. Converting the strain signal of the step S 1 into a force signal through bench test calibration;
S 3, after equivalent damage calculation is carried out on the force signals, the force signals are converted into constant-amplitude alternating cyclic loads with fixed amplitude, or random loads simulating road load spectrums are formed after the signals are subjected to filtering, compression, splicing and other processes;
s 4, using an electric cylinder, carrying out iteration or constant amplitude loading on the force signal through remote parameter control software or a signal loading control degree program, and obtaining a driving signal to drive the electric cylinder to execute action, so as to apply load under a steering working condition to the McPherson front suspension brake angle assembly;
s 5, when the step S 4 is executed to apply the load under the steering working condition to the McPherson front suspension brake angle assembly, the brake test bed can be designed to rotate at a constant speed in a alternating manner, but the whole process does not work under the braking working condition.
The invention also provides a test method of the McPherson type front suspension assembly braking test device, which is characterized in that the test method adopts the McPherson type front suspension assembly braking test device, when the test method evaluates the braking fatigue strength of the McPherson type front suspension angle assembly under the braking working condition, only the braking test platform works, and the McPherson type front suspension assembly is continuously or singly braked under different rotation directions, temperatures, speeds and decelerations or braking pressures, and the braking performance under different temperatures, speeds and braking pressures is evaluated.
According to one embodiment of the invention, the test method comprises the steps of:
S 1, carrying a rotation speed sensor, an acceleration sensor, a temperature sensor and a pressure sensor when a test field road of a real vehicle is used for carrying out a braking working condition test, and collecting a rotation speed signal, an acceleration signal, a temperature signal and a braking pressure signal of a brake disc in a Macpherson front suspension braking angle assembly under the braking working condition;
S 2, filtering, compressing and splicing the acquired signals to form effective signals of rotation speed, acceleration, temperature and pressure, wherein the effective signals are used as target signals arranged in the brake test bed;
s 3, setting the parameters of the rotating speed, the acceleration, the temperature and the pressure in the step S 2 through remote parameter control software, and implementing equivalent loading through the main shaft 20 of the inertia platform.
The invention also provides a test method of the McPherson type front suspension assembly braking test device, which is characterized in that the McPherson type front suspension assembly braking test device is adopted, when the test method is used for checking the braking fatigue strength of the McPherson type front suspension angle assembly under the condition of matching with emergency braking during turning, matching with the combination of multiple times of low-speed turning and fewer times of high-speed turning, combining with multiple combinations of different temperatures and braking pressure, simulating a braking state, matching with an electric cylinder to simulate a steering working condition, and loading constant amplitude alternating cyclic load with fixed amplitude.
According to one embodiment of the invention, the test method comprises the steps of:
S 1, carrying strain gauges, rotating speed sensors, acceleration sensors, temperature sensors and pressure sensors when a steering braking working condition test is carried out on a test field road of a real vehicle, and collecting force signals of a transverse pull rod, rotating speed signals of a brake disc, temperature signals and braking pressure signals;
S 2, converting the strain signal in the step S 1 into a force signal through bench test calibration;
S 3, filtering, compressing and splicing the acquired signals to form constant-amplitude alternating cyclic load which is used as a target signal applied by the electric cylinder;
S 4, synchronizing the step S 3, and performing test execution on an inertia table spindle in a Macpherson front suspension angle assembly brake test device by taking collected rotation speed, acceleration, temperature and brake pressure signals as target signals of a brake test table.
The invention has the positive progress effects that:
The McPherson front suspension assembly braking test device and the McPherson front suspension assembly braking test method provided by the invention are used for planning a combined 1/4 front suspension braking assembly and a steering tie rod test device, and the device is simple in design, convenient to manufacture and convenient to install.
The test method not only can independently check the braking fatigue strength of the Macpherson front suspension angle assembly under the braking working condition and the fatigue strength of the Macpherson front suspension and the braking angle assembly under the steering working condition, but also can check the braking fatigue strength of the Macpherson front suspension angle assembly under the emergency braking working condition matched with turning. The three can be alternately performed to make up for the test state of the single working condition (combined with the working condition I or the working condition II) of the current separate test. Time and economic cost are saved, and the method can be greatly popularized in the braking test of the Macpherson front suspension and the braking angle assembly.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of embodiments taken in conjunction with the accompanying drawings in which like reference characters designate like features throughout the drawings, and in which:
Fig. 1 is a schematic structural view of a prior art front suspension brake angle assembly brake test apparatus.
FIG. 2 is a perspective view of a McPherson front suspension assembly brake test apparatus according to the present invention.
Fig. 3 is a front view of a macpherson front suspension assembly brake test device of the present invention.
FIG. 4 is a schematic view of the sample portion to be tested in the McPherson front suspension assembly brake test device according to the present invention.
FIG. 5 is a schematic illustration of the structure of the Macpherson front suspension brake angle assembly in the Macpherson front suspension assembly brake test apparatus of the present invention.
FIG. 6 is a schematic diagram of the structure of the main axle of the inertia station in the McPherson front suspension assembly brake test apparatus of the present invention.
FIG. 7 is a schematic view of the drive section of the brake stand in the McPherson front suspension assembly brake test apparatus of the present invention.
Fig. 8 is a schematic structural view of a coupling in a macpherson front suspension assembly brake test device of the present invention.
FIG. 9 is a schematic illustration of the installation of the electric cylinder loading assembly in the McPherson front suspension assembly brake test device of the present invention.
FIG. 10 is a schematic view of the structure of the electric cylinder in the McPherson front suspension assembly brake test device of the present invention.
Fig. 11 is a schematic structural view of a test fixture electric cylinder fixing assembly in the macpherson front suspension assembly brake test device of the present invention.
FIG. 12 is a schematic view of the structure of the control arm fixing plate in the McPherson front suspension assembly brake test device of the present invention.
FIG. 13 is a schematic view of the structure of the electric cylinder stabilizer in the McPherson front suspension assembly brake test device of the present invention.
Fig. 14 is a schematic structural view of a test fixture sample assembly in a macpherson front suspension assembly brake test apparatus of the present invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
Furthermore, although terms used in the present invention are selected from publicly known and commonly used terms, some terms mentioned in the present specification may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein.
Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.
FIG. 2 is a perspective view of a McPherson front suspension assembly brake test apparatus according to the present invention. Fig. 3 is a front view of a macpherson front suspension assembly brake test device of the present invention.
As shown in fig. 2 and 3, the present invention discloses a macpherson front suspension assembly brake test device, which comprises a sample portion 10 to be tested, an inertia table spindle 20, an electric cylinder loading assembly 30, a test jig electric cylinder fixing assembly 40 and a test jig sample assembly 50, wherein a first end of the sample portion 10 to be tested is connected with the inertia table spindle 20, a second end is connected with the electric cylinder loading assembly 30, a third end is connected with the test jig sample assembly 50, the test jig electric cylinder fixing assembly 40 is mounted on the test jig sample assembly 50, and the electric cylinder loading assembly 30 is fixed on the test jig electric cylinder fixing assembly 40.
FIG. 4 is a schematic view of the sample portion to be tested in the McPherson front suspension assembly brake test device according to the present invention. FIG. 5 is a schematic illustration of the structure of the Macpherson front suspension brake angle assembly in the Macpherson front suspension assembly brake test apparatus of the present invention.
As shown in fig. 4 and 5, the sample portion 10 to be measured includes a macpherson front suspension brake angle assembly 11, a lateral pull rod 12, a lock nut 13, and a rod end bearing 14, one end of the lateral pull rod 12 is connected to a lower portion of the macpherson front suspension brake angle assembly 11, and one end of the rod end bearing 14 is connected to the other end of the lateral pull rod 12 through the lock nut 13. The rod end bearing 14 is coupled according to an actual vehicle assembly condition.
FIG. 6 is a schematic diagram of the structure of the main axle of the inertia station in the McPherson front suspension assembly brake test apparatus of the present invention. FIG. 7 is a schematic view of the drive section of the brake stand in the McPherson front suspension assembly brake test apparatus of the present invention. Fig. 8 is a schematic structural view of a coupling in a macpherson front suspension assembly brake test device of the present invention.
As shown in fig. 6 to 8, the inertia table spindle 20 includes a brake test table driving portion 21, a coupling 22, and a bolt-nut connecting mechanism 23, and one end portion of the coupling 22 is connected to a universal joint 211 of the brake test table driving portion 21 through the bolt-nut connecting mechanism 23. The brake stand driving section 21 has a universal joint 211 and a coupler 22 connected by a bolt-and-nut connection mechanism 23, and the coupler 22 is connected to a brake disc section of the macpherson front suspension brake angle assembly 11 by a bolt 24.
FIG. 9 is a schematic illustration of the installation of the electric cylinder loading assembly in the McPherson front suspension assembly brake test device of the present invention. FIG. 10 is a schematic view of the structure of the electric cylinder in the McPherson front suspension assembly brake test device of the present invention.
As shown in fig. 9 and 10, the electric cylinder loading assembly 30 includes an electric cylinder 31, an adapter rod 32, and a rod end bearing clamp block 33 that are sequentially connected, and the rod end bearing clamp block 33 is connected to the other end portion of the rod end bearing 14 by a connecting pin. The rod end bearing clamping block 33 is connected with the connecting pin connecting rod end bearing 14 to drive and transmit the electric cylinder 31 to the pull rod so as to simulate the axial load of the pull rod.
Fig. 11 is a schematic structural view of a test fixture electric cylinder fixing assembly in the macpherson front suspension assembly brake test device of the present invention. FIG. 12 is a schematic view of the structure of the control arm fixing plate in the McPherson front suspension assembly brake test device of the present invention. FIG. 13 is a schematic view of the structure of the electric cylinder stabilizer in the McPherson front suspension assembly brake test device of the present invention.
As shown in fig. 11 to 13, the test jig electric cylinder fixing assembly 40 includes a control arm fixing plate 41, an electric cylinder stabilizer 42, a pressing plate bolt 43, and an actuator bolt 44, the electric cylinder stabilizer 42 being fixed to an upper end portion of the control arm fixing plate 41 by a plurality of pressing plate bolts 43 such that a mounting hole a is formed between the electric cylinder stabilizer 42 and the control arm fixing plate 41. The switching rod 32 is inserted into the mounting hole a, and the electric cylinder 31 is connected to the control arm fixing plate 41 and the electric cylinder stabilizer 42 by the actuator bolt 44.
The control arm fixing plate 41 is connected to the control arm portion of the macpherson front suspension brake angle assembly 11, and the electric cylinder stabilizer 42 is fixed to the control arm fixing plate 41 by the pressure plate bolt 43, and the coupling and actuator bolt 44 is used to fix the electric cylinder 31.
Fig. 14 is a schematic structural view of a test fixture sample assembly in a macpherson front suspension assembly brake test apparatus of the present invention.
As shown in fig. 14, the test fixture sample assembly 50 is used to connect the suspension portion of the macpherson front suspension brake angle assembly 11 and to secure it to the brake stand. The test jig sample assembly 50 includes a suspension fixing base frame 51 and an adjustable shock absorber mounting bracket 52, the adjustable shock absorber mounting bracket 52 is mounted on one side of the suspension fixing base frame 51, a third portion of the sample portion 10 to be tested is connected to the top of the suspension fixing base frame 51, and the control arm fixing plate 41 is mounted on the suspension fixing base frame 51 between the suspension fixing base frame 51 and the adjustable shock absorber mounting bracket 52.
According to the above structural description, the inertia table main shaft 20 and the electric cylinder loading assembly 30 constitute a driving portion of the test. The brake stand driving portion (with universal joint) of the inertia stand spindle 20 can be rotated forward to simulate service braking. The brake pad driving portion of the inertia pad spindle 20 may be reversed to simulate a reverse brake. The electric cylinder 31 in the electric cylinder loading assembly 30 can do reciprocating travel, and the axial stress of the steering tie rod in the real vehicle state is simulated. The inertia table main shaft 20 is connected to the sample portion 10 by being matched with a bolt and a nut, the electric cylinder loading assembly 30 is fixed to the test fixture electric cylinder fixing assembly 40 (test fixture electric cylinder fixing assembly) by being matched with a bolt and a nut, and the sample portion 10 to be tested is fixedly connected with the test fixture electric cylinder fixing assembly 40 by being matched with a bolt and a nut. The Macpherson front suspension angle assembly braking test device not only can be used for conventional braking performance tests (wear tests, braking noise tests, braking shake tests and the like), but also can be combined with a steering tie rod to carry out a combined test so as to simulate the stress state of the tie rod in a real vehicle state when the vehicle is braked in a turning mode.
The test method of the McPherson front suspension assembly braking test device is proposed under various conditions as follows:
the first working condition is to simulate the steering working condition in the driving process
The invention also provides a test method of the McPherson type front suspension assembly braking test device, which adopts the McPherson type front suspension assembly braking test device, when the test method evaluates the fatigue strength of the McPherson type front suspension braking angle assembly under the steering working condition, the braking test table only rotates at a constant speed and does not work as the braking working condition, the electric cylinder simulates the steering working condition, and constant amplitude alternating cyclic load with a fixed amplitude or random load simulating a road load spectrum is loaded.
And a specific step S 1, collecting a strain signal of the transverse pull rod through a strain gauge in a real vehicle test field road test.
In step S 2, in the fatigue strength test of the McPherson type front suspension and brake angle assembly, the road spectrum signal transmitted to the McPherson type front suspension and brake angle assembly, namely the road analog signal, is considered, and the signal is generally a force signal. And (3) converting the strain signal in the step (1) into a force signal through bench test calibration.
And step S 3, after equivalent damage calculation is carried out on the force signals, the force signals are converted into constant-amplitude alternating cyclic loads with fixed amplitude, or random loads simulating road load spectrums are formed after the signals are subjected to filtering, compression, splicing and other processes.
And S 4, using an electric cylinder, and carrying out iteration or constant amplitude loading on the force signal through remote parameter control software or a signal loading control program to obtain a driving signal so as to drive the electric cylinder to execute action, so that the load under the steering working condition is applied to the McPherson front suspension brake angle assembly.
And step S 5, when the step S 4 is executed to apply the load under the steering working condition to the McPherson front suspension brake angle assembly, the brake test bed can be designed to rotate at a constant speed in a alternating manner, but the whole process does not work under the braking working condition.
Therefore, the McPherson type front suspension brake angle assembly 11 is tested according to the road simulation force signal, and the reproduction of the real working condition of the McPherson type front suspension brake angle assembly 11 is realized, so that the stress condition of the McPherson type front suspension brake angle assembly 11 in the actual working state can be truly simulated.
The second working condition is to simulate the braking working condition in the running process
The invention also provides a test method of the McPherson type front suspension assembly braking test device, which adopts the McPherson type front suspension assembly braking test device, when the test method evaluates the braking fatigue strength of the McPherson type front suspension angle assembly under the braking working condition, only the braking test platform works, and the McPherson type front suspension assembly continuously or singly brakes under different rotation directions, temperatures, speeds and decelerations or braking pressures, and evaluates the braking performance under different temperatures, speeds and braking pressures.
At the same time of collecting the force signals, a rotation speed sensor, an acceleration sensor, a temperature sensor and a pressure sensor collect rotation speed signals, temperature signals and braking pressure signals of a brake disc in the McPherson front suspension braking angle assembly 11, and equivalent loading is implemented through the inertia platform main shaft 20.
And a specific step S 1, carrying a rotation speed sensor, an acceleration sensor, a temperature sensor and a pressure sensor when a test field road of a real vehicle is used for carrying out a braking working condition test, and collecting a rotation speed signal, an acceleration signal, a temperature signal and a braking pressure signal of a brake disc in a Macpherson front suspension braking angle assembly under the braking working condition.
And step 2, performing filtering, compression, splicing and other processing on the acquired signals to form effective signals of rotating speed, acceleration, temperature and pressure, wherein the effective signals are used as target signals arranged in the brake test bed.
In step S 3, parameters of rotation speed, acceleration, temperature and pressure in step S 2 are set through remote parameter control software, and equivalent loading is implemented through the inertia table spindle 20.
The test working condition of the Macpherson front suspension brake angle assembly 11 on the inertia table main shaft 20 is determined according to the rotating speed, the acceleration, the temperature and the brake pressure acquired by the actual working condition of the actual vehicle, so that the load of the Macpherson front suspension brake angle assembly 11 in the test process can be ensured to be consistent with the actual vehicle working condition.
Working condition III, simulating the braking and steering working condition in the running process
The invention also provides a test method of the McPherson type front suspension assembly braking test device, which adopts the McPherson type front suspension assembly braking test device, when the test method is used for checking the braking fatigue strength of the McPherson type front suspension angle assembly under the condition of matching with emergency braking during turning, matching with the combination of multiple low-speed turning and fewer high-speed turning, combining with multiple combinations of different temperatures and braking pressure, simulating a braking state, matching with an electric cylinder to simulate a steering working condition, and loading constant amplitude alternating cyclic load with fixed amplitude.
And a specific step S 1, carrying a strain gauge, a rotating speed sensor, an acceleration sensor, a temperature sensor and a pressure sensor when a steering braking working condition test is carried out on a test field road of a real vehicle, and collecting a force signal of the transverse pull rod 12, a rotating speed signal of a brake disc, a temperature signal and a braking pressure signal.
And S 2, converting the strain signal in the step S 1 into a force signal through bench test calibration.
Step S 3, filtering, compressing, splicing and the like are carried out on the acquired signals to form constant-amplitude alternating cyclic load which is used as a target signal applied by the electric cylinder 31;
step S 4 is to synchronize step S 3, and the collected signals such as rotating speed, acceleration, temperature and brake pressure are used as target signals of the brake test stand. The test execution was performed on the inertia table spindle 20 in the macpherson front suspension angle assembly brake test apparatus.
The output method and process of the target signal of the electric cylinder 31 are the same as those of the first working condition, and the output method and process of the target signal used in the test of the main shaft 20 of the inertia platform are the same as those of the second working condition, except that the characteristics of the signal collected by the real vehicle are different, and the components used for loading are different.
The McPherson front suspension assembly braking test device and the test method thereof are designed and combined with a 1/4 front suspension braking assembly to cooperate with a tie rod test, and are closer to the real vehicle state assessment system-level braking performance. The invention simulates the state of a real vehicle, plans to test the performance test method of the brake test under various working conditions, and is realized by matching with a proper tool.
In summary, the McPherson front suspension assembly brake test device and the McPherson front suspension assembly brake test method provided by the invention are used for planning a combined 1/4 front suspension brake assembly and a steering tie rod test device, and the device is simple in design, convenient to manufacture and convenient to install.
The test method not only can independently check the braking fatigue strength of the Macpherson front suspension angle assembly under the braking working condition and the fatigue strength of the Macpherson front suspension and the braking angle assembly under the steering working condition, but also can check the braking fatigue strength of the Macpherson front suspension angle assembly under the emergency braking working condition matched with turning. The three can be alternately performed to make up for the test state of the single working condition (combined with the working condition I or the working condition II) of the current separate test. Time and economic cost are saved, and the method can be greatly popularized in the braking test of the Macpherson front suspension and the braking angle assembly.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (8)
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| JP2005106596A (en) * | 2003-09-30 | 2005-04-21 | Koyo Seiko Co Ltd | Wheel load detection device |
| CN101718632B (en) * | 2009-11-16 | 2011-04-13 | 浙江大学 | Multifunctional test bed for simulating condition by one-quarter suspension of vehicle |
| CN105403416B (en) * | 2014-07-17 | 2018-06-19 | 广州汽车集团股份有限公司 | Automotive suspension strength test bed frame |
| CN204171909U (en) * | 2014-10-29 | 2015-02-25 | 上海汇众汽车制造有限公司 | Front overhang brake noise fest fixture |
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2022
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109187056A (en) * | 2018-09-20 | 2019-01-11 | 中信戴卡股份有限公司 | Wheel suspension test bench with real road surface characteristics |
| CN109765061A (en) * | 2018-12-27 | 2019-05-17 | 中国第一汽车股份有限公司 | Passenger Vehicle Suspension System Bench Test Facility |
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