CN210893710U - Semitrailer air suspension test bench - Google Patents
Semitrailer air suspension test bench Download PDFInfo
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- CN210893710U CN210893710U CN201922501252.3U CN201922501252U CN210893710U CN 210893710 U CN210893710 U CN 210893710U CN 201922501252 U CN201922501252 U CN 201922501252U CN 210893710 U CN210893710 U CN 210893710U
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Abstract
The utility model provides a semitrailer air suspension test bench belongs to semitrailer air suspension technical field. Semitrailer air suspension test bench includes: the fixed rack that sets up subaerial is provided with two servomechanisms relatively on the rack, and the both ends of simulation axle are connected respectively to the one end that two servomechanisms are close to ground, and the simulation axle is used for being connected with semitrailer air suspension, and semitrailer air suspension hangs the setting through the simulation axle, and two servomechanisms are tested through applying load to semitrailer air suspension. The utility model discloses can simulate the load that semi-trailer air suspension receives among the real vehicle test to carry out fatigue test to semi-trailer air suspension, reduce test cost, shorten test cycle.
Description
Technical Field
The utility model relates to a semitrailer air suspension technical field particularly, relates to a semitrailer air suspension test bench.
Background
The national mandatory standard GB7258-2017 motor vehicle operation safety technical conditions is formally implemented in 2018, 1 month and 1 day, and the new standard increases the requirements on the rear axle of a dangerous cargo transport truck with the total mass of more than or equal to 12000kg, all dangerous cargo transport semitrailers and three-axle railing type and bin grid type semitrailers which are required to be provided with air suspensions, so that the application of the air suspensions on the semitrailers is further popularized.
The semitrailer air suspension product quality problem (such as gasbag rupture etc.) can cause road safety accidents such as the car turns over, vehicle out of control, directly threatens road transportation and driver life and property safety.
At present, a unified standard and accurate test method for a semitrailer air suspension system is not provided, and a test bed special for the semitrailer air suspension is also not provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a semitrailer air suspension test bench can simulate the load that semitrailer air suspension receives among the real vehicle test to carry out fatigue test to semitrailer air suspension, reduce test cost, shorten test cycle.
The embodiment of the utility model is realized like this:
the embodiment of the utility model provides a pair of semitrailer air suspension test bench for detect semitrailer air suspension's fatigue performance, semitrailer air suspension test bench includes: the fixed rack that sets up subaerial is provided with two servomechanisms relatively on the rack, and the both ends of simulation axle are connected respectively to the one end that two servomechanisms are close to ground, and the simulation axle is used for being connected with semitrailer air suspension, and semitrailer air suspension hangs the setting through the simulation axle, and two servomechanisms are tested through applying load to semitrailer air suspension.
Optionally, the semitrailer air suspension test bench still includes mounting plate, and the rack includes a plurality of mount pads, the relative vertical column and the transverse bar that set up, and mount pad one side is connected with mounting plate fixed connection, opposite side and the one end of vertical column are connected in order to fix vertical column, and the transverse bar is connected between two adjacent vertical columns.
Optionally, the vertical columns include four, the fixed points of the four vertical columns are sequentially connected to form a square, the transverse rods include four, and the four transverse rods are sequentially connected between the four vertical columns to form four sides of the square.
Optionally, the rack further comprises two support bars fixedly connected to the vertical pillars, respectively, and intersecting to form two diagonals of a square.
Optionally, the servo mechanism includes a mounting support and a servo cylinder, one end of the mounting support is fixedly arranged on the transverse rod, and the other end of the mounting support is connected with the servo cylinder.
Optionally, the mounting support includes a seat plate, a connecting bolt and an oil cylinder connecting piece, the connecting bolt is respectively connected with the seat plate and the oil cylinder connecting piece, the transverse rod is inserted between the seat plate and the oil cylinder connecting piece, and the oil cylinder connecting piece is further movably connected with the servo oil cylinder.
Optionally, the simulation axle includes axle connecting seat and axle main part, and axle connecting seat one end is connected with servo cylinder, the other end and axle main part fixed connection.
Optionally, semitrailer air suspension test bench still includes spacing frock, and spacing frock includes spacing bottom plate, gasbag limiting plate and suspension limiting plate, and spacing bottom plate one side and mounting plate fixed connection, opposite side both ends are provided with gasbag limiting plate and suspension limiting plate respectively, and the gasbag limiting plate is used for spacing suspension gasbag along the degree of freedom of direction of gravity, and the suspension limiting plate is used for spacing semitrailer air suspension along the degree of freedom of direction of gravity.
Optionally, one side of the air bag limiting plate, which is far away from the limiting bottom plate, is provided with a plurality of mounting holes for connecting the air suspension air bag of the semitrailer.
Optionally, one side of the airbag limiting plate, which is far away from the limiting bottom plate, is provided with a limiting hook, and the limiting hook is used for connecting a semitrailer air suspension.
The utility model discloses beneficial effect includes:
the embodiment of the utility model provides a pair of semitrailer air suspension test bench is used for hanging the simulation axle through setting up two servomechanism on the rack, and the simulation axle is connected with semitrailer air suspension, and two servomechanism apply the load to be used for carrying out fatigue performance's test to it to semitrailer air suspension. Specifically, semitrailer air suspension test bench includes: the fixed rack that sets up subaerial, be provided with two servomechanisms on the rack relatively, the both ends of simulation axle are connected respectively to the one end that two servomechanisms are close to ground, the simulation axle is used for being connected with semitrailer air suspension, semitrailer air suspension hangs the setting through the simulation axle, promptly, semitrailer air suspension is close to the one end on ground and fixes, the point of keeping away from ground is connected with servomechanism through the simulation axle, consequently, two servomechanisms are through applying load to semitrailer air suspension and testing. To sum up, the utility model discloses can simulate the load that semi-trailer air suspension receives among the real vehicle test to carry out fatigue test to semi-trailer air suspension, reduce test cost, shorten test cycle.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a semitrailer air suspension test bed provided by the embodiment of the utility model;
fig. 2 is a schematic structural view of a rack of a semitrailer air suspension test bed provided by the embodiment of the utility model;
fig. 3 is one of schematic structural diagrams of mounting supports of a semitrailer air suspension test bed provided by the embodiment of the utility model;
fig. 4 is a second schematic structural view of an installation support of a semitrailer air suspension test bed provided in the embodiment of the present invention;
fig. 5 is one of schematic structural diagrams of a simulated axle of a semitrailer air suspension test bed provided by the embodiment of the utility model;
fig. 6 is a second schematic diagram of a simulated axle structure of the semitrailer air suspension test stand provided in the embodiment of the present invention;
fig. 7 is one of schematic structural diagrams of a limiting tool of a semitrailer air suspension test bed provided by the embodiment of the utility model;
fig. 8 is a second schematic structural view of a limiting tool of a semitrailer air suspension test bed provided in the embodiment of the present invention;
fig. 9 is a flowchart of a simulation test method of a semitrailer air suspension test bed provided by the embodiment of the utility model;
fig. 10 is a flow chart of a harmonic signal loading method of a semitrailer air suspension test bed simulation test provided by the embodiment of the utility model;
fig. 11 is a flow chart for processing load spectrum signals in a simulation test method for a semitrailer air suspension test bed provided by the embodiment of the utility model.
Icon: 100-mounting a bottom plate; 200-a gantry; 201-a mounting seat; 202-vertical posts; 203-transverse bar; 300-mounting a support; 301-a seat plate; 302-connecting bolts; 303-oil cylinder connecting piece; 400-a servo oil cylinder; 500-simulating an axle; 501-axle main body; 502-axle coupling sockets; 600-limiting tooling; 601-a limit bottom plate; 602-airbag limiting plate; 603-a suspension limiting plate; 604-limit hook.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is the utility model provides a semitrailer air suspension test bench's schematic structure, please refer to fig. 1, the embodiment of the utility model provides a semitrailer air suspension test bench for detect semitrailer air suspension's fatigue performance, semitrailer air suspension test bench includes: the fixed rack 200 that sets up subaerial, be provided with two servomechanisms on the rack 200 relatively, the both ends of simulation axle 500 are connected respectively to the one end that two servomechanisms are close to ground, and simulation axle 500 is used for being connected with semitrailer air suspension, and semitrailer air suspension hangs the setting through simulation axle 500, and two servomechanisms are tested through applying load to semitrailer air suspension.
The air suspension of the semitrailer is the best choice for realizing the comfort and the passing performance of a vehicle, the height change of the vehicle body can be judged by a traveling computer according to the difference of road conditions and signals of a distance sensor, and then an air compressor and an exhaust valve are controlled to automatically compress or extend a spring, so that the ground clearance of a chassis is reduced or increased, and the stability of a high-speed vehicle body or the passing performance of a complex road condition is increased. Therefore, the semitrailer air suspension is an important factor influencing vehicle development, the fatigue performance test period of the semitrailer air suspension in a real vehicle test is long, and the test cost is too high, so that a test bed is needed to be designed, and the fatigue performance of the semitrailer air suspension can be accurately tested.
First, the rack 200 is fixedly disposed on the ground, and there are various ways in which the rack 200 can be fixedly disposed, for example, the ground is a hardened cement surface, and a steel bar or a connecting bolt is embedded in the cement surface, so that the rack 200 can be fixedly disposed on the ground by embedding the steel bar or the connecting bolt into the cement surface, or the mounting base plate 100 is fixedly connected to the ground, the mounting base plate 100 is generally used for mounting test stands with various functions, and the rack 200 is disposed on the mounting base plate 100, and the rack 200 can also be fixedly disposed on the ground.
Secondly, two servomechanisms are oppositely arranged on the rack 200, and are used for providing a load in a test process, generally, signals are input into the servomechanisms, and the vibration frequency and the amplitude of the servomechanisms are controlled, so that execution of a test object is realized, namely, the test object vibrates along with the frequency and the amplitude of the servomechanisms, and the fatigue performance of the test object is tested.
Thirdly, the length of the simulated axle 500 in the embodiment is only consistent with that of the real axle, that is, the ratio of the length of the simulated axle 500 to the length of the real axle is 1:1, and the mass of the simulated axle 500 is input in the form of test parameters in the test process of the simulated axle 500, so that the length relation and the weight relation of the simulated axle 500 and the real axle which are basically consistent are realized, therefore, the error in the test process of the fatigue performance of the air suspension of the semi-trailer can be reduced, and the accuracy of the test result of the fatigue performance of the air suspension of the semi-trailer is improved.
Fourthly, on the test bench of this embodiment, the semitrailer air suspension is close to the one end on ground and is fixed the setting, and the semitrailer air suspension is kept away from the one end on ground and is directly connected with simulation axle 500, so, after two servomechanism input drive signal, semitrailer air suspension carries out fatigue performance's test through simulation axle 500 drive.
The embodiment of the utility model provides a pair of semitrailer air suspension test bench is used for hanging simulation axle 500 through setting up two servomechanism on rack 200, simulation axle 500 and semitrailer air suspension fixed connection, and two servomechanism apply the load and are used for carrying out fatigue performance's experiment to semitrailer air suspension. Specifically, semitrailer air suspension test bench includes: the fixed rack 200 that sets up subaerial, be provided with two servomechanisms on the rack 200 relatively, the both ends of simulation axle 500 are connected respectively to the one end that two servomechanisms are close to ground, simulation axle 500 is used for being connected with semitrailer air suspension, semitrailer air suspension hangs the setting through simulation axle 500, promptly, semitrailer air suspension is close to the one end on ground and fixes, keep away from a little on ground and be connected with servomechanism through simulation axle 500, consequently, two servomechanisms are through applying load to semitrailer air suspension and testing. Therefore, the utility model discloses can simulate the load that semi-trailer air suspension receives among the real vehicle test to carry out fatigue test to semi-trailer air suspension, reduce test cost, shorten test cycle.
Fig. 2 is the utility model provides a semitrailer air suspension test bench's rack 200 structure sketch map, optionally, in this embodiment, please refer to fig. 2, semitrailer air suspension test bench still includes mounting plate 100, vertical stand 202 and the transverse bar 203 that rack 200 includes a plurality of mount pads 201, relative setting, mount pad 201 one side and mounting plate 100 fixed connection, opposite side are connected with fixed vertical stand 202 with the one end of vertical stand 202, transverse bar 203 is connected between two adjacent vertical stand 202.
It should be noted that, in this embodiment, the test bed is used for bearing a semitrailer air suspension, where the mounting base plate 100 is a T-shaped groove cast iron base plate and is fixedly mounted on the ground, the mounting seat 201 of the bench 200 is fixedly connected to the mounting base plate 100 to fix the vertical column 202 in the bench 200, and the vertical column 202 is used to support two servomechanisms, the simulation axle 500, and the semitrailer air suspension. The transverse rod 203 is connected between two adjacent vertical columns 202, and the transverse rod 203 and the vertical columns 202 are mutually supported to form the structure of the rack 200.
Optionally, in this embodiment, the vertical columns 202 include four, the fixing points of the four vertical columns 202 are sequentially connected to form a square, the transverse rods 203 include four, and the four transverse rods 203 are sequentially connected between the four vertical columns 202 to form four sides of the square.
It should be noted that, because two ends of the air suspension of the semitrailer are respectively suspended by the two servo mechanisms, a structure capable of realizing relative support needs to be arranged, the square structure is preferred, the square frame is easy to build, and the two opposite sides of the square can be used for arranging the two servo mechanisms which are arranged oppositely.
Optionally, in this embodiment, the stand 200 further includes two support rods fixedly connected to the vertical pillars 202, respectively, and intersecting to form two diagonals of a square.
It should be noted that two support rods are arranged at two diagonal lines of the square to support the four vertical columns 202 to prevent the vertical columns from deforming or being unstable, so that the fatigue performance test result of the air suspension of the semitrailer is affected, namely, the two support rods are arranged to improve the stability of the air suspension test bed of the semitrailer.
In this embodiment, the servo mechanism includes a mounting base 300 and a servo cylinder 400, one end of the mounting base 300 is fixedly disposed on the transverse rod 203, and the other end is connected to the servo cylinder 400.
The servo oil cylinder is a combined device formed by arranging and installing a free-lubrication low-friction double-acting oil cylinder and a pneumatic servo valve, and is a cylindrical metal part for guiding a piston to do linear reciprocating motion in the servo oil cylinder, the servo oil cylinder takes a standard oil cylinder as a main body and an electronic oil cylinder positioner as a core, and continuous analog control of the whole process of extending an oil cylinder pull rod by 0-100% is completed through a given standard analog electric signal.
It should be noted that, in the process of testing the fatigue performance of the air suspension of the semitrailer, the fatigue performance test is completed by loading the acting force of the air suspension of the semitrailer many times, selecting the servo oil cylinder 400 and directly inputting the corresponding signal spectrum, so that the fatigue performance test can be completed quickly.
Fig. 3 is one of the structural schematic diagrams of the mounting support 300 of the semitrailer air suspension test bed that the embodiment of the utility model provides, please refer to fig. 3 in this embodiment, and mounting support 300 includes bedplate 301, connecting bolt 302 and hydro-cylinder connecting piece 303, and connecting bolt 302 connects bedplate 301 and hydro-cylinder connecting piece 303 respectively, and horizontal pole 203 is inserted and is located between bedplate 301 and the hydro-cylinder connecting piece 303, and hydro-cylinder connecting piece 303 still with servo cylinder 400 swing joint.
It should be noted that, referring to fig. 3 and 4 in combination, the mounting bracket 300 is used to connect the servo cylinder 400, so that the servo cylinder 400 is suspended on two transverse rods 203 oppositely arranged in the rack 200, the seat plate 301 is equivalent to a connecting gasket, the seat plate 301 is arranged to distribute the force of the connecting bolt 302 on the transverse rods 203, and the cylinder connecting member 303 is used to connect one end of the servo cylinder 400, so that the servo cylinder 400 is suspended on the transverse rods 203.
Fig. 5 is one of the structural schematic diagrams of the simulation axle 500 of the semitrailer air suspension test stand provided by the embodiment of the utility model, in this embodiment, please refer to fig. 5, the simulation axle 500 includes an axle connecting seat 502, an axle main body 501, the axle connecting seat 502 one end is connected with the servo cylinder 400, the other end and axle main body 501 fixed connection.
The axle main body 501 is connected with a semitrailer air suspension, a suspension airbag is further arranged on the semitrailer air suspension, the suspension airbag is a shock absorber, each air chamber is inflated by a powerful air pump, the suspension airbag is commonly used on a passenger car and a light truck, and the stroke is short.
It should be noted that, please refer to fig. 5 and fig. 6 in combination, the length and the width of the axle main body 501 are the same as those of an axle on a real vehicle, the axle connecting seat 502 is movably connected with one end of the servo oil cylinder 400 close to the ground, the axle main body 501 is connected with the air suspension of the semi-trailer, the servo oil cylinder 400 drives the simulation axle 500 to drive the air suspension of the semi-trailer to vibrate, as can be known from the above, the other end of the air suspension of the semi-trailer is fixed on the air suspension test bed of the semi-trailer, wherein one end of the suspension airbag is fixedly connected with the air suspension of the semi-trailer, and the other end of the suspension airbag is fixed on the.
Fig. 7 is the embodiment of the utility model provides a semitrailer air suspension test bench's one of spacing frock 600 structure schematic diagram, in this embodiment, please refer to fig. 7, semitrailer air suspension test bench still includes spacing frock 600, spacing frock 600 includes spacing bottom plate 601, gasbag limiting plate 602 and suspension limiting plate 603, spacing bottom plate 601 one side and mounting plate 100 fixed connection, the opposite side both ends are provided with gasbag limiting plate 602 and suspension limiting plate 603 respectively, gasbag limiting plate 602 is used for the degree of freedom of spacing suspension gasbag along direction of gravity, suspension limiting plate 603 is used for the degree of freedom of spacing semitrailer air suspension along direction of gravity.
It should be noted that the limiting tool 600 is used for fixing one end of the air suspension of the semitrailer, which is close to the ground, and the limiting tool 600 is fixedly arranged on the mounting base plate 100 for the degrees of freedom of the suspension airbag and the air suspension of the semitrailer along the gravity direction. The structure of the limiting tool 600 is specifically designed according to the structure of the air suspension of the semitrailer, and the specific structure of the limiting tool 600 is not limited.
In this embodiment, a plurality of mounting holes are formed in one side of the airbag limiting plate 602, which is far away from the limiting bottom plate 601, and are used for connecting air suspension airbags of the semitrailer.
It should be noted that, according to the above description, the limiting tool 600 is configured to fix the air suspension of the semitrailer and limit the air suspension of the semitrailer and the suspension airbag connected to the air suspension of the semitrailer, so that a plurality of mounting holes corresponding to the suspension airbag are provided on the airbag limiting plate 602 to connect and fix the suspension airbag, thereby limiting the degree of freedom of the suspension airbag in the direction of gravity.
Fig. 8 is the second structure schematic diagram of the limiting tool 600 of the semitrailer air suspension test bed provided by the embodiment of the utility model, in this embodiment, please refer to fig. 8, one side of the airbag limiting plate 602 away from the limiting bottom plate 601 is provided with the limiting hook 604, and the limiting hook 604 is used for connecting the semitrailer air suspension.
It should be noted that, after the semitrailer air suspension test bed is built, the semitrailer air suspension is tested, the semitrailer air suspension is firstly installed on the test bed, specifically, semitrailer air suspension one end and servo cylinder 400 swing joint, the other end is fixed through limiting tool 600, wherein, gasbag limiting plate 602 on limiting tool 600 is used for spacing and fixing the suspension gasbag, suspension limiting plate 603 carries out spacing and fixing on semitrailer air suspension, and the test of fatigue property can be carried out after the completion of installation.
The embodiment of the utility model provides a pair of semitrailer air suspension test bench is used for hanging simulation axle 500 through setting up two servo cylinder 400 on rack 200, simulation axle 500 and semitrailer air suspension fixed connection, and two servo cylinder 400 are exerted load and are used for carrying out fatigue performance's experiment to semitrailer air suspension. Specifically, the fixed point of four vertical posts 202 in rack 200 is the square, transverse bar 203 fixed connection is between adjacent vertical post 202, be used for supporting semi-trailer air suspension test bench, two relative settings of servo cylinder 400 hang on two relative transverse bar 203, the other end of servo cylinder 400 is connected with simulation axle 500, simulation axle 500 is used for connecting semi-trailer air suspension, the installation relation of semi-trailer air suspension and axle on the simulation real vehicle, semi-trailer air suspension's the other end is fixed on spacing frock 600, spacing frock 600 is used for the spacing fixed of semi-trailer air suspension, semi-trailer air suspension test bench installation is accomplished, start two servo cylinder 400 simultaneously and test. Therefore, the utility model discloses can simulate among the real vehicle test the impact that semitrailer air suspension received and carry out semitrailer air suspension's fatigue test, reduce test cost, shorten test cycle.
Fig. 9 is the utility model provides a semitrailer air suspension test bench analogue test method flow chart, please refer to fig. 9, the utility model provides an on the other hand provides a semitrailer air suspension test bench analogue test method, and this method is applied to foretell semitrailer air suspension test bench, and semitrailer air suspension test bench analogue test method includes:
and S10, connecting the air suspension of the semitrailer to be tested on a servo mechanism of the air suspension test bed of the semitrailer.
Specifically, two ends of a movable end of an air suspension of the semitrailer are respectively connected with the two servo oil cylinders 400, two ends of a fixed end of the air suspension of the semitrailer are respectively connected with the limiting tool 600, an air bag of the suspension is fixedly connected with an air bag limiting plate 602 in the limiting tool 600, and the air suspension of the semitrailer is connected with a limiting hanger 604 in the limiting tool 600.
And S20, synchronously inputting preset signals to the two servomechanisms to start the servomechanisms to apply loads to the air suspension of the semitrailer.
The preset signal may be a harmonic signal or a road load spectrum signal.
It should be noted that the servo mechanism includes a servo oil cylinder 400, different signals are selected as preset signals according to test requirements, if the road load spectrum signals acquired are required to be the preset signals in order to simulate the road driving condition more truly, if the road surface is relatively flat or the convex-concave fluctuation is not large and is relatively regular, harmonic signals can be selected as the preset signals to be input, and technicians in the field can select the preset signals input into the servo oil cylinder 400 according to the test conditions.
And S30, closing the servo mechanism and obtaining the test result.
It should be noted that the test result refers to observing whether the air bag of the suspension is damaged or not and whether other parts of the air suspension of the semitrailer are damaged or not.
The embodiment of the utility model provides an on the other hand, the utility model provides a semitrailer air suspension test bench simulation test method, at first set up semitrailer air suspension installation in semitrailer air suspension test bench, then input preset signal to servo cylinder 400, start servo cylinder 400 and test, at last, the test ends, whether each part of semitrailer air suspension detection semitrailer air suspension is impaired is taken off, thereby judge its fatigue performance, semitrailer air suspension test bench simulation test method can accurate simulation true road surface, semitrailer air suspension's fatigue performance is tested, avoid the real car to carry out its fatigue performance's test to semitrailer air suspension, reduce test cycle, and the reduction in production cost plays very important effect to improving product quality.
Fig. 10 is the utility model provides a semitrailer air suspension test bench analogue test method harmonic signal loading flow chart the utility model provides an in the semitrailer air suspension test bench analogue test method, optionally, please refer to fig. 10, step S20, to two servomechanism synchronous input preset signal in order to start servomechanism and apply load to semitrailer air suspension, include:
and S221, inputting a first harmonic signal for loading, wherein the first harmonic signal is loaded for 30 ten thousand times in a circulating mode.
And S222, inputting a second harmonic signal for loading, and circularly loading the second harmonic signal for 30 ten thousand times.
It should be noted that, the harmonic signal is selected to be cyclically loaded, and there are two specific loading modes, the first mode is the first mode, the first harmonic signal is firstly input to be loaded for 30 ten thousand times, then the second harmonic signal is input to be loaded for 30 ten thousand times, the end of loading is the end of the test process, and the first loading mode is suitable for simulation of a relatively flat road surface.
Or, S211, the first harmonic signal is input at the same time to be loaded 1 time.
And S212, inputting a second harmonic signal to load for 1 time.
And S213, repeatedly loading the first harmonic signal and the second harmonic signal circularly for 30 ten thousand times.
It should be noted that, compared to the first loading method, the second loading method is to input the first harmonic signal for loading 1 time, then input the second harmonic signal for loading 1 time, and finally input the first harmonic signal and the second harmonic signal for 30 ten thousand times in a cyclic reciprocating manner, and the test process is finished when the loading is finished, and the second loading method is suitable for simulating a rough road surface.
Wherein, the first harmonic signal: amplitude of 60mm, frequency of 1Hz and phase angle difference of 0 °, second harmonic signal: the amplitude is 60mm, the frequency is 1Hz and the phase angle difference is 180 °.
It should be noted that, when the first harmonic signal is input to the two servo cylinders 400, the amplitude of the applied load of the two servo cylinders 400 is the same, the frequency is the same, and the vector directions of the load are the same, that is, the phase difference is 0 °; when the second harmonic signals are respectively input into the two servo cylinders 400, the applied loads of the two servo cylinders 400 have the same amplitude and the same frequency, and the vector directions of the loads are opposite, that is, the phase difference is 180 °.
Fig. 11 is the utility model provides an in the semitrailer air suspension test bench simulation test method that provides to load spectrum signal processing flow chart the utility model provides an in the semitrailer air suspension test bench simulation test method, optionally, please refer to fig. 11, before step S20, before two servomechanism synchronous inputs preset signal in order to start servomechanism to apply load to semitrailer air suspension, the method includes:
and S11, carrying out low-pass filtering processing on the collected road load spectrum signals.
It should be noted that the low-pass filtering process refers to filtering out the high-frequency signal and retaining the low-frequency signal.
And S12, eliminating invalid signals in the road load spectrum signals.
It should be noted that the invalid signal is a signal that cannot be used for the preset signal, and the determination of the invalid signal is performed according to a test requirement or an enterprise requirement, or an enterprise requirement reserves a valid signal.
And S13, outputting the processed road load spectrum signal as a preset signal.
It should be noted that, as can be seen from the above, the valid signal is the preset signal.
The embodiment of the utility model provides a semitrailer air suspension test bench analogue test method, to the processing or the selection of presetting the signal, in order to more accurately simulate the experiment of semitrailer air suspension on true road surface, wherein, it gives two kinds to preset the signal, one kind is the road surface load spectrum signal of collection, one kind is the harmonic signal on simulation road surface, when presetting the signal for road surface load spectrum signal, at first set up the semitrailer air suspension connection that awaits measuring on the servo of semitrailer air suspension test bench, then to two servo synchronous inputs road surface load spectrum signals in order to start servo and apply load to semitrailer air suspension, close servo, obtain the test result. When the preset signal is a harmonic signal, the harmonic signal is synchronously input to the two servomechanisms to start the servomechanisms to apply loads to the air suspension of the semitrailer, the specific loading method comprises two types, and the first loading method comprises the following steps: inputting a first harmonic signal for loading, circularly loading the first harmonic signal for 30 ten thousand times, inputting a second harmonic signal for loading, circularly loading the second harmonic signal for 30 ten thousand times, closing a servo mechanism, and obtaining a test result; the second loading method comprises the following steps: and simultaneously inputting a first harmonic signal for loading for 1 time, inputting a second harmonic signal for loading for 1 time, repeatedly and circularly loading the first harmonic signal and the second harmonic signal for 30 ten thousand times, closing the servo mechanism and obtaining a test result. The processing of the road signal spectrum comprises filtering and wave selection, wherein the filtering is to filter out high-frequency signals, the wave selection is to select effective signals and remove ineffective signals, and therefore preset signals input into the servo oil cylinder 400 can be obtained. Therefore, the semitrailer air suspension test bed simulation test method can accurately simulate the semitrailer air suspension fatigue performance test, shorten the test period and improve the product production quality.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a semitrailer air suspension test bench for detect semitrailer air suspension's fatigue performance, a serial communication port, include: the semi-trailer air suspension device comprises a rack fixedly arranged on the ground, wherein two servo mechanisms are oppositely arranged on the rack, one ends of the two servo mechanisms close to the ground are respectively connected with two ends of a simulation axle, the simulation axle is used for being connected with a semi-trailer air suspension, the semi-trailer air suspension is arranged in a suspension mode through the simulation axle, and the two servo mechanisms are used for carrying out tests by applying loads to the semi-trailer air suspension.
2. The semitrailer air suspension test bed of claim 1, further comprising a mounting base plate, wherein the stand comprises a plurality of mounting seats, oppositely arranged vertical upright posts and transverse rods, one side of each mounting seat is fixedly connected with the mounting base plate, the other side of each mounting seat is connected with one end of each vertical upright post so as to fix the vertical upright posts, and the transverse rods are connected between every two adjacent vertical upright posts.
3. The semitrailer air suspension test bed of claim 2, wherein said vertical columns comprise four, the fixed points of four vertical columns are sequentially connected to form a square, said transverse rods comprise four, and said four transverse rods are sequentially connected between four vertical columns to form four sides of said square.
4. A semi-trailer air suspension test stand as claimed in claim 3 wherein said stand further comprises two support bars fixedly connected to the vertical posts, respectively, and intersecting to form two diagonals of said square.
5. The semitrailer air suspension test stand of claim 3, wherein the servo mechanism comprises a mounting support and a servo cylinder, one end of the mounting support is fixedly arranged on the transverse rod, and the other end of the mounting support is connected with the servo cylinder.
6. The semitrailer air suspension test bed of claim 5, wherein said mounting bracket comprises a seat plate, a connecting bolt and an oil cylinder connecting piece, said connecting bolt is respectively connected with said seat plate and said oil cylinder connecting piece, said cross rod is inserted between said seat plate and said oil cylinder connecting piece, and said oil cylinder connecting piece is also movably connected with a servo oil cylinder.
7. The semitrailer air suspension test stand of claim 5, wherein said simulated axle includes an axle coupling seat and an axle body, one end of said axle coupling seat being connected to said servo cylinder and the other end being fixedly connected to said axle body.
8. The semitrailer air suspension test bed according to claim 7, further comprising a limiting tool, wherein the limiting tool comprises a limiting bottom plate, an airbag limiting plate and a suspension limiting plate, the airbag limiting plate and the suspension limiting plate are respectively arranged at one side of the limiting bottom plate and fixedly connected with the mounting bottom plate and at the two ends of the other side of the limiting bottom plate, the airbag limiting plate is used for limiting the degree of freedom of the suspension airbag along the gravity direction, and the suspension limiting plate is used for limiting the degree of freedom of the semitrailer air suspension along the gravity direction.
9. A semitrailer air suspension test stand according to claim 8, characterized in that the side of said airbag limiting plate, remote from said limiting base plate, is provided with a plurality of mounting holes for connecting said suspension airbags.
10. A semitrailer air suspension test stand according to claim 8, characterized in that one side of the airbag limiting plate, which is far away from the limiting bottom plate, is provided with a limiting hook for connecting the semitrailer air suspension.
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| CN201922501252.3U CN210893710U (en) | 2019-12-31 | 2019-12-31 | Semitrailer air suspension test bench |
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| CN201922501252.3U CN210893710U (en) | 2019-12-31 | 2019-12-31 | Semitrailer air suspension test bench |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113280715A (en) * | 2021-01-25 | 2021-08-20 | 南京依维柯汽车有限公司 | Quick calibration method for air suspension |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113280715A (en) * | 2021-01-25 | 2021-08-20 | 南京依维柯汽车有限公司 | Quick calibration method for air suspension |
| CN113280715B (en) * | 2021-01-25 | 2023-09-05 | 南京依维柯汽车有限公司 | Quick calibration method for air suspension |
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