CN111397925B - Suspension frame test bed - Google Patents
Suspension frame test bed Download PDFInfo
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- CN111397925B CN111397925B CN202010207679.7A CN202010207679A CN111397925B CN 111397925 B CN111397925 B CN 111397925B CN 202010207679 A CN202010207679 A CN 202010207679A CN 111397925 B CN111397925 B CN 111397925B
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- 239000000725 suspension Substances 0.000 title claims abstract description 118
- 238000012360 testing method Methods 0.000 title claims abstract description 57
- 230000005484 gravity Effects 0.000 claims abstract description 19
- 230000008859 change Effects 0.000 claims abstract description 7
- 238000005339 levitation Methods 0.000 claims description 46
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000005457 optimization Methods 0.000 abstract description 4
- 230000000712 assembly Effects 0.000 description 11
- 238000000429 assembly Methods 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009194 climbing Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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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
- G01M17/08—Railway vehicles
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Abstract
The invention provides a suspension frame test bed, which comprises: the device comprises a base, a first support, a connecting assembly, a loading assembly, a counterweight assembly and a control assembly; the base is used for installing a magnetic suspension track; the first bracket is arranged above the base; one end of the connecting component is connected with the first bracket; the loading assembly is connected with the other end of the connecting assembly so as to apply downward force to the first support through the connecting assembly; the counterweight component is arranged on the first support and comprises a first counterweight block, and the first counterweight block can slide relative to the first support so as to change the gravity center of the first support; the control assembly is connected with the first support and located above the first support, and the control assembly comprises a controller used for controlling the suspension state of the suspension frame. The suspension rack test bed provided by the invention verifies the suspension control algorithm of the suspension rack, realizes the optimization of the suspension control algorithm and ensures the safe operation of vehicles.
Description
Technical Field
The invention relates to the technical field of magnetic suspension, in particular to a suspension frame test bed.
Background
At present, medium-low speed magnetic suspension traffic has the advantages of safety, comfort, strong climbing capability and low noise, and has wide development prospect as a novel urban rail traffic mode.
In the related technology, the suspension frame of the medium-low speed maglev train is a key part for train operation, and the quality of a control algorithm of the suspension frame directly affects the operation quality and even safety of the maglev train, so that it is necessary to simulate the working state of the suspension frame before the train operates and test the suspension frame to verify the quality of the control algorithm.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the invention proposes a suspension test stand.
In view of the above, the first aspect of the present invention provides a suspension test stand, including: the device comprises a base, a first support, a connecting assembly, a loading assembly, a counterweight assembly and a control assembly; the base is used for installing a magnetic suspension track; the first bracket is arranged above the base; one end of the connecting component is connected with the first bracket; the loading assembly is connected with the other end of the connecting assembly so as to apply downward force to the first support through the connecting assembly; the counterweight component is arranged on the first support and comprises a first counterweight block, and the first counterweight block can slide relative to the first support so as to change the gravity center of the first support; the control assembly is connected with the first support and located above the first support, and the control assembly comprises a controller used for controlling the suspension state of the suspension frame.
According to the suspension frame test bed provided by the invention, the magnetic suspension rail is arranged on the base, the suspension frame is matched with the magnetic suspension rail, the first support is arranged on the suspension frame, the controller controls the suspension of the suspension frame, the loading assembly applies downward tension to the suspension frame through the connecting assembly so as to simulate the stress state of a train, the counterweight assembly is arranged on the support, the first counterweight block moves in a plane formed by the support to change the gravity center of the support, so that the stress of the suspension frame is biased, the stress state of the suspension frame when a person walks in a carriage is simulated, the suspension state of the suspension frame is tested through the testing equipment, the suspension control algorithm of the suspension frame is verified, the optimization of the suspension control algorithm is realized, and the safe running of the vehicle is ensured.
In addition, the suspension frame test bed in the technical scheme provided by the invention can also have the following additional technical characteristics:
in the above technical solution, preferably, the control assembly further includes a support leg and a second bracket, one end of the support leg is connected with the first bracket; the second support is connected with the other end of supporting leg, and the controller sets up on the second support.
In this technical scheme, the supporting leg supports the second support, ensures the stability of second support, and the controller is installed on the second support, realizes the fixed to the controller.
Preferably, the number of the controllers is four, and the controllers are distributed on four corners of the suspension frame.
In any of the above technical solutions, preferably, the control assembly further includes a handle, and both ends of the handle are connected with the side wall of the support leg.
In this technical scheme, through the side wall mounting handle at the supporting leg, be convenient for fix the circuit of test bench, avoid the circuit to disturb the test to the suspension frame, ensure the accuracy to the suspension frame test.
In any one of the above technical solutions, preferably, the counterweight assembly further includes an electric sliding table, the electric sliding table is disposed on the first support, and the first counterweight is disposed on the electric sliding table.
In the technical scheme, the electric sliding table drives the first balancing weight to move on a plane formed by the first support, so that the gravity center of the first support is changed; the first balancing weight is driven to move through the electric sliding table, so that the suspension frame test bed is simpler in structure and convenient to install, the displacement and the moving speed of the first balancing weight can be accurately controlled, and the gravity center of the first support can be controlled.
In any of the above technical solutions, preferably, the number of the counterweight assemblies is four, the four sets of counterweight assemblies are arranged along the circumferential direction of the first support, and the adjacent counterweight assemblies are perpendicular to each other.
In this technical scheme, four group's counter weight subassemblies are the rectangle setting for set up a balancing weight on every electronic slip table, the length direction and the width direction motion of first support can be followed respectively to four balancing weights, ensure that the focus of first support can skew to arbitrary direction, make the state of simulating more being close the state when the train moves.
In any of the above technical solutions, preferably, the first bracket includes a framework, a cover plate, a first mounting plate and a second mounting plate; the cover plate is connected with the framework and positioned above the framework, and the counterweight component is arranged on the cover plate; the first mounting plate is connected with the framework and positioned below the framework; the second mounting panel is connected with the skeleton, is located the below of skeleton.
In the technical scheme, the framework is connected with the cover plate, so that the first support is firmer, the first mounting plate and the second mounting plate are respectively used for mounting the air spring and the loading assembly, and mounting interfaces are reserved for mounting the air spring and the connecting assembly.
In any of the above technical solutions, preferably, the suspension test stand further includes an air spring, one end of the air spring is connected with the first mounting plate, and the other end of the air spring is used for mounting the suspension.
In the technical scheme, the first support is connected with the suspension frame through the air spring, and the air spring simulates a suspension system of a train, so that the state of the train simulated by the suspension frame test bed is more real.
In any of the above technical solutions, preferably, the loading assembly includes a second mounting seat, a rotating shaft, a loading wheel and a torsion assembly; the second mounting seat is connected with the base; the rotating shaft penetrates through the second mounting base and can rotate relative to the second mounting base; the loading wheel is sleeved on the rotating shaft; the torsion assembly is connected with the rotating shaft so as to apply torsion to the rotating shaft.
In this technical scheme, the second mount pad is installed on the base, and on the second mount pad was worn to locate in the pivot, the loading wheel cover was located in the pivot, on stay cord winding and the loading wheel, the torsion subassembly was when applying torsion to the pivot, the loading wheel rotated, and then driven the stay cord motion, and the pull force is applied to first support to the stay cord, and then simulated that passenger quantity is different in the train carriage, the stress state of train realizes the test to the suspension.
In any one of the above technical solutions, preferably, the torsion assembly includes a support member, a sliding member, and a second weight block; the supporting component is connected with the rotating shaft; the sliding component is connected with the supporting component and can slide relative to the supporting component; the second balancing weight is arranged on the sliding part.
In the technical scheme, the supporting part is connected with the rotating shaft, and the sliding part and the second balancing weight exert a downward force on the supporting part under the action of gravity, so that the supporting part exerts a torque force for driving the rotating shaft to rotate on the rotating shaft, and the first support is loaded; the sliding part drives the second balancing weight to slide on the supporting part, the distance from the gravity center of the second balancing weight to the axis of the rotating shaft is an arm of force corresponding to the gravity of the second balancing weight, the length of the arm of force is changed, so that the torque applied to the rotating shaft is changed, the change of the load applied to the first support is realized, the loading speed of the first support can be adjusted by controlling the sliding speed of the sliding block, and stepless adjustment can be realized. Torsion is exerted to the pivot by the dependence of second balancing weight self gravity, need not drive arrangement such as pneumatic cylinder, and when the energy can be saved, pollutants such as no hydraulic oil produced for operational environment is clean and tidy more. The size of second balancing weight can be changed according to the size of loading force.
Preferably, the sliding member is an electric slide table.
In any one of the above technical solutions, preferably, the connection assembly includes: the pulley assembly comprises a first pulley assembly, a second pulley assembly and a pull rope; the first pulley assembly is arranged on the first bracket; the second pulley component is arranged on the base; one end of stay cord is connected with the base, and the other end is connected with the loading subassembly, and the stay cord is walked around first loose pulley assembly and second loose pulley assembly.
In this technical scheme, stay cord one end is connected with the base, and the duplex winding is connected with the loading subassembly through first loose pulley assembly and second loose pulley assembly, and the loading subassembly exerts pulling force to the support through the stay cord, and the extending direction of first loose pulley assembly and second loose pulley assembly control stay cord, and then the realization is controlled the atress direction of support, ensures that the support atress is even stable.
Preferably, the pull cord is a steel cord.
In any of the above solutions, preferably, the first pulley assembly includes at least two pulleys, and the at least two pulleys are respectively located on two sides of the second pulley assembly.
In the technical scheme, the first pulley assembly is connected with the support, the pull rope winds one pulley of the first pulley assembly and then winds the second pulley assembly, and then winds the other pulley of the first pulley assembly, so that the loading force applied to the loading assembly is amplified, the loading capacity of the loading assembly is improved, and the volume of the loading assembly can be reduced.
In any of the above technical solutions, preferably, the connection assembly further includes a third pulley assembly, the third pulley assembly is mounted on the base, and the pull rope passes under the third pulley assembly.
In this technical scheme, after the stay cord walked around first loose pulley assembly and second loose pulley assembly, walked around third loose pulley assembly once more, third loose pulley assembly played and carried out spacing effect to the stay cord, has controlled the extending direction of stay cord, avoids stay cord and support to take place to interfere, ensures the stability of test bench work.
In any of the above technical solutions, preferably, the suspension test stand further includes: and the limiting assembly is arranged on the magnetic suspension track and is positioned on one side of the suspension frame so as to limit the displacement of the suspension frame in the length direction of the magnetic suspension track.
In this technical scheme, through setting up spacing subassembly, when the suspension state of test suspension frame, the displacement of restriction suspension frame on the length direction of magnetic levitation track avoids the suspension frame to remove along the length direction of magnetic levitation track, and then makes the test to the suspension frame more accurate to in designer's optimization to suspension control algorithm.
In any of the above technical solutions, preferably, the limiting assembly includes a mounting assembly and a guide wheel; the mounting component is mounted on the magnetic suspension track; the leading wheel is connected with the installation component in a rotating way.
In this technical scheme, the mounting bracket is installed on the magnetic levitation track, and the leading wheel is installed on the mounting bracket, and at the in-process that carries out the test to the suspension, the leading wheel contacts with the suspension, or contacts with first support for be sliding friction between spacing subassembly and the suspension, reduce spacing subassembly and suspension, or the frictional force between spacing subassembly and the first support, and then reduce the interference of this frictional force to the suspension test result.
In any of the above technical solutions, preferably, the mounting assembly includes a third mounting plate and a first mounting seat; the third mounting plate is attached to the magnetic suspension track, and mounting holes are formed in the third mounting plate and are matched with hole positions in the magnetic suspension track; the first mounting base is connected with the third mounting plate.
In this technical scheme, be provided with the mounting hole on the third mounting panel to hole site looks adaptation on mounting hole and the magnetic levitation track, the third mounting panel only need can realize through the bolt with the orbital connection of magnetic levitation, and because hole site looks adaptation on mounting hole and the magnetic levitation track, need not to carry out secondary design to the magnetic levitation track, only utilize original hole site on the magnetic levitation track can realize the installation to the third mounting panel. The first mounting seat is mounted on the third mounting plate, and the first mounting seat is fixed.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a schematic structural diagram of a suspension test stand according to one embodiment of the present invention;
FIG. 2 illustrates a front view of a suspension test stand according to one embodiment of the present invention;
FIG. 3 shows a schematic structural diagram of a control assembly according to one embodiment of the present invention;
FIG. 4 illustrates a schematic structural view of a support leg according to one embodiment of the present invention;
FIG. 5 illustrates a schematic structural view of a counterweight assembly according to one embodiment of the present invention;
FIG. 6 illustrates a schematic structural view of a counterweight assembly according to another embodiment of the invention;
FIG. 7 shows a schematic structural view of a first bracket according to an embodiment of the invention;
FIG. 8 shows a schematic structural view of a first bracket according to another embodiment of the invention;
FIG. 9 shows a schematic structural view of a first bracket according to yet another embodiment of the present invention;
FIG. 10 illustrates a schematic view of an assembly of an air spring and suspension according to one embodiment of the present invention;
FIG. 11 illustrates a schematic view of an assembly of an air spring with a first mounting plate according to one embodiment of the present invention;
FIG. 12 illustrates a schematic structural view of a loading assembly and connection assembly according to one embodiment of the present invention;
figure 13 shows a schematic structural view of a stop assembly according to one embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 13 is:
the device comprises a base 1, a first support 2, a framework 22, a cover plate 24, a first mounting plate 26, a second mounting plate 28, an air spring 29, a connecting assembly 3, a first pulley assembly 32, a second pulley assembly 34, a pull rope 36, a third pulley assembly 38, a loading assembly 4, a second mounting seat 42, a rotating shaft 44, a loading wheel 46, a torsion assembly 48, a supporting part 482, a sliding part 484, a second balancing weight 486, a limiting assembly 5, a guide wheel 52, a third mounting plate 54, a first mounting seat 56, a magnetic levitation track 6, a counterweight assembly 7, a first balancing weight 72, an electric sliding table 74, an 8 suspension frame, a control assembly 9, a controller 92, supporting legs 94, a second support 96 and a handle 98.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The suspension test stand according to some embodiments of the present invention is described below with reference to fig. 1-13.
In an embodiment of an aspect of the present invention, as shown in fig. 1 and 2, the present invention provides a suspension 8 test stand, including: the device comprises a base 1, a first bracket 2, a connecting assembly 3, a loading assembly 4, a counterweight assembly 7 and a control assembly 9; the base 1 is used for installing a magnetic suspension track 6; the first bracket 2 is arranged above the base 1; one end of the connecting component 3 is connected with the first bracket 2; the loading assembly 4 is connected with the other end of the connecting assembly 3 so as to apply a downward force to the first bracket 2 through the connecting assembly 3; the counterweight component 7 is arranged on the first bracket 2, the counterweight component 7 comprises a first counterweight block 72, and the first counterweight block 72 can slide relative to the first bracket 2 so as to change the gravity center of the first bracket 2; the control assembly 9 is connected to the first frame 2 and located above the first frame 2, and the control assembly 9 includes a controller 92 for controlling the suspension state of the suspension frame 8.
In this embodiment, the magnetic levitation track 6 is installed on the base 1, the levitation frame 8 is matched with the magnetic levitation track 6, the first support 2 is installed on the levitation frame 8, the controller 92 controls the levitation of the levitation frame 8, the loading component 4 applies downward pulling force to the levitation frame 8 through the connecting component 3 to simulate the stress state of the train, the counterweight component 7 is arranged on the support, the first counterweight block 72 moves in the plane formed by the support, the center of gravity of the support is changed, the stress of the levitation frame 8 is biased, the stress state of the levitation frame 8 when a person walks in a carriage is simulated, the levitation state of the levitation frame 8 is tested through the testing equipment, the levitation control algorithm of the levitation frame 8 is verified, the optimization of the levitation control algorithm is realized, and the safe running of the vehicle is ensured.
In one embodiment of the present invention, preferably, as shown in fig. 1 to 3, the control assembly 9 further includes a support leg 94 and a second bracket 96, one end of the support leg 94 being connected to the first bracket 2; the second bracket 96 is connected to the other end of the support leg 94, and the controller 92 is provided on the second bracket 96.
In this embodiment, the support legs 94 support the second bracket 96 to ensure stability of the second bracket 96, and the controller 92 is mounted on the second bracket 96 to achieve fixation of the controller 92.
Preferably, the number of controllers 92 is four, distributed at the four corners of the suspension 8.
In one embodiment of the present invention, preferably, as shown in fig. 1 to 4, the control assembly 9 further includes a handle 98, and both ends of the handle 98 are connected to the side walls of the support legs 94.
In this embodiment, the handle 98 is installed on the side wall of the support leg 94, so that the line of the test stand can be conveniently fixed, the line interference on the test of the suspension rack 8 is avoided, and the test accuracy of the suspension rack 8 is ensured.
In an embodiment of the present invention, preferably, as shown in fig. 5 and 6, the counterweight assembly 7 further includes an electric sliding table 74, the electric sliding table 74 is disposed on the first bracket 2, and the first balancing weight 72 is disposed on the electric sliding table 74.
In this embodiment, the electric sliding table 74 drives the first weight block 72 to move on the plane formed by the first bracket 2, so as to change the center of gravity of the first bracket 2; the first balancing weight 72 is driven to move through the electric sliding table 74, so that the test bed of the suspension frame 8 is simpler in structure and convenient to install, the displacement and the moving speed of the first balancing weight 72 can be accurately controlled, and the gravity center of the first support 2 can be controlled.
In one embodiment of the present invention, preferably, as shown in fig. 5 and 6, the number of the weight assemblies 7 is four, the four sets of weight assemblies 7 are arranged along the circumferential direction of the first bracket 2, and the adjacent weight assemblies 7 are perpendicular to each other.
In this embodiment, four sets of counterweight assemblies 7 are arranged in a rectangular shape, so that each electric sliding table 74 is provided with one counterweight, and the four counterweights can move along the length direction and the width direction of the first support 2 respectively, so as to ensure that the center of gravity of the first support 2 can shift to any direction, and the simulated state is closer to the state when a train runs.
In one embodiment of the present invention, preferably, as shown in fig. 7 to 9, the first bracket 2 includes a frame 22, a cover plate 24, a first mounting plate 26, and a second mounting plate 28; the cover plate 24 is connected with the framework 22 and positioned above the framework 22, and the counterweight component 7 is arranged on the cover plate 24; the first mounting plate 26 is connected with the framework 22 and is positioned below the framework 22; a second mounting plate 28 is connected to the frame 22 and is positioned below the frame 22.
In this embodiment, the frame 22 is connected to the cover plate 24 to make the first bracket 2 more stable, and the first and second mounting plates 26 and 28 are used to mount the air spring 29 and the loading assembly 4, respectively, and to reserve a mounting interface for mounting the air spring 29 and the connecting assembly 3.
In one embodiment of the present invention, preferably, as shown in fig. 10 and 11, the suspension 8 test stand further includes an air spring 29, and one end of the air spring 29 is connected to the first mounting plate 26 and the other end is used for mounting the suspension 8.
In the embodiment, the first bracket 2 is connected with the suspension frame 8 through the air spring 29, and the air spring 29 simulates a suspension system of a train, so that the train state simulated by the test bed of the suspension frame 8 is more real.
In one embodiment of the present invention, preferably, as shown in fig. 2 and 12, the loading assembly 4 includes a second mounting seat 42, a rotating shaft 44, a loading wheel 46 and a torsion assembly 48; the second mounting seat 42 is connected with the base 1; the rotating shaft 44 is arranged on the second mounting seat 42 in a penetrating way and can rotate relative to the second mounting seat 42; the loading wheel 46 is sleeved on the rotating shaft 44; the torsion assembly 48 is connected to the shaft 44 to apply a torsion force to the shaft 44.
In this embodiment, the second mounting seat 42 is mounted on the base 1, the rotating shaft 44 penetrates through the second mounting seat 42, the loading wheel 46 is sleeved on the rotating shaft 44, the pulling rope 36 is wound on the loading wheel 46, when the torque assembly 48 applies torque to the rotating shaft 44, the loading wheel 46 rotates to drive the pulling rope 36 to move, the pulling rope 36 applies pulling force to the first support 2, and therefore it is simulated that the number of passengers in a train compartment is different, the stress state of the train is different, and the test on the suspension frame 8 is realized.
In one embodiment of the present invention, preferably, as shown in fig. 2 and 12, the torsion assembly 48 includes a support member 482, a slide member 484, and a second weight block 486; the supporting part 482 is connected with the rotating shaft 44; a slide member 484 connected to the support member 482 to be slidable relative to the support member 482; the second weight 486 is provided on the sliding member 484.
In this embodiment, the supporting part 482 is connected to the rotating shaft 44, and the sliding part 484 and the second weight 486 apply a downward force to the supporting part 482 under the action of gravity, so that the supporting part 482 applies a torque force to the rotating shaft 44 to drive the rotating shaft 44 to rotate, thereby loading the first bracket 2; the sliding component 484 drives the second balancing weight 486 to slide on the supporting component 482, the distance from the gravity center of the second balancing weight 486 to the axis of the rotating shaft 44 is a moment arm corresponding to the gravity of the second balancing weight 486 itself, the length of the moment arm is changed, so that the torque applied to the rotating shaft 44 is changed, the load applied to the first support 2 is changed, the loading speed of the first support 2 can be adjusted by controlling the sliding speed of the sliding block, and stepless adjustment can be achieved. The second weight block 486 applies a torsion force to the rotating shaft 44 by means of the gravity of the second weight block, and driving devices such as hydraulic cylinders are not needed, so that energy is saved, and meanwhile, pollutants such as hydraulic oil are not generated, and the working environment is cleaner and tidier. The size of the second weight 486 can be changed according to the magnitude of the loading force.
Preferably, the slide member 484 is a motorized slide table 74.
Preferably, the number of the torsion assemblies 48 is two, and the torsion assemblies are respectively connected to both ends of the rotating shaft 44.
Preferably, a through hole is formed in the loading wheel 46, the pulling rope 36 is wound on the loading wheel 46, and the other end of the pulling rope 36 penetrates through the through hole; the suspension frame test stand further comprises a fixing clamp, and the fixing clamp is connected with the other end of the pull rope 36.
Preferably, the suspension test stand further comprises a first stop and a second stop; the first stopper is arranged on the mounting seat 42; the second stopper is arranged on the rotating shaft 44; when the rotating shaft 44 rotates to a predetermined angle, the first stopper contacts the second stopper.
In one embodiment of the present invention, preferably, as shown in fig. 2 and 12, the connecting assembly 3 includes: a first pulley assembly 32, a second pulley assembly 34, and a pull cord 36; the first pulley assembly 32 is mounted on the first bracket 2; the second pulley assembly 34 is mounted on the base 1; a pull cord 36 is connected at one end to the base 1 and at the other end to the loading assembly 4, with the pull cord 36 passing around the first pulley assembly 32 and the second pulley assembly 34.
In this embodiment, one end of the pulling rope 36 is connected to the base 1, and bypasses the first pulley assembly 32 and the second pulley assembly 34 to be connected to the loading assembly 4, the loading assembly 4 applies a pulling force to the bracket through the pulling rope 36, and the first pulley assembly 32 and the second pulley assembly 34 control the extending direction of the pulling rope 36, so as to control the stress direction of the bracket, and ensure that the bracket is uniformly and stably stressed.
Preferably, the pull cord 36 is a steel cord.
In one embodiment of the present invention, preferably, as shown in fig. 2 and 12, the first pulley assembly 32 includes at least two pulleys, which are respectively located on both sides of the second pulley assembly 34.
In this embodiment, the first pulley assembly 32 is connected to the bracket, and the pulling rope 36 passes around one pulley of the first pulley assembly 32, then passes around the second pulley assembly 34, and then passes around the other pulley of the first pulley assembly 32, so as to amplify the loading force applied to the loading assembly 4, improve the loading capacity of the loading assembly 4, and reduce the volume of the loading assembly 4.
In one embodiment of the present invention, preferably, as shown in fig. 2 and 12, the connecting assembly 3 further includes a third pulley assembly 38, the third pulley assembly 38 is mounted on the base 1, and the pulling rope 36 passes under the third pulley assembly 38.
In this embodiment, after the pulling rope 36 passes around the first pulley assembly 32 and the second pulley assembly 34, the pulling rope 36 passes around the third pulley assembly 38 again, and the third pulley assembly 38 plays a role in limiting the pulling rope 36, so that the extending direction of the pulling rope 36 is controlled, the interference between the pulling rope 36 and the bracket is avoided, and the working stability of the test bed is ensured.
In one embodiment of the present invention, preferably, as shown in fig. 2 and 13, the suspension 8 test stand further includes: and the limiting assembly 5 is arranged on the magnetic levitation track 6 and is positioned on one side of the levitation frame 8 so as to limit the displacement of the levitation frame 8 in the length direction of the magnetic levitation track 6.
In this embodiment, by arranging the limiting component 5, when the suspension state of the suspension rack 8 is tested, the displacement of the suspension rack 8 in the length direction of the magnetic suspension track 6 is limited, and the suspension rack 8 is prevented from moving along the length direction of the magnetic suspension track 6, so that the test on the suspension rack 8 is more accurate, and a designer can optimize a suspension control algorithm conveniently.
Preferably, the number of the limiting assemblies 5 is two, and the two limiting assemblies are respectively arranged on two sides of the suspension rack 8.
In one embodiment of the present invention, preferably, as shown in fig. 2 and 13, the spacing assembly 5 comprises a mounting assembly and a guide wheel 52; the mounting component is mounted on the magnetic suspension track 6; the guide wheel 52 is rotatably connected to the mounting assembly.
In this embodiment, the mounting bracket is mounted on the magnetic levitation track 6, the guide wheel 52 is mounted on the mounting bracket, and in the process of testing the levitation frame 8, the guide wheel 52 contacts with the levitation frame 8 or contacts with the first support 2, so that sliding friction exists between the limiting component 5 and the levitation frame 8, friction between the limiting component 5 and the levitation or between the limiting component 5 and the first support 2 is reduced, and interference of the friction on the test result of the levitation frame 8 is reduced.
In one embodiment of the present invention, preferably, as shown in fig. 2 and 13, the mounting assembly includes a third mounting plate 54 and a first mounting seat 56; the third mounting plate 54 is attached to the magnetic levitation track 6, and mounting holes are formed in the third mounting plate 54 and are matched with hole positions on the magnetic levitation track 6; the first mounting block 56 is coupled to the third mounting plate 54.
In this embodiment, the third mounting plate 54 is provided with mounting holes adapted to the hole locations on the magnetic levitation track 6, the third mounting plate 54 can be connected to the magnetic levitation track 6 only by bolts, and the mounting holes adapted to the hole locations on the magnetic levitation track 6 do not need to design the magnetic levitation track 6, and the third mounting plate 54 can be mounted only by using the original hole locations on the magnetic levitation track 6. The first mounting seat 56 is mounted on the third mounting plate 54, and the first mounting seat 56 is fixed.
Preferably, the first mount 56 includes a fixed member and two support members; the fixed member is mounted on the mounting plate 54; two support members are connected to the fixed member with the guide wheel 52 located between the two support members.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
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 (14)
1. A suspension test stand, comprising:
the base is used for installing a magnetic suspension track;
the first bracket is arranged above the base;
the connecting assembly is connected with one end of the first support;
a loading assembly connected with the other end of the connection assembly to apply a downward force to the first bracket through the connection assembly;
the counterweight assembly is arranged on the first bracket and comprises a first counterweight block, and the first counterweight block can slide relative to the first bracket so as to change the gravity center of the first bracket;
the control assembly is connected with the first bracket and is positioned above the first bracket, and the control assembly comprises a controller used for controlling the suspension state of the suspension bracket;
wherein, the loading subassembly includes second mount pad, pivot, loading wheel and torsion subassembly:
the second mounting seat is connected with the base;
the rotating shaft penetrates through the second mounting base and can rotate relative to the second mounting base;
the loading wheel is sleeved on the rotating shaft;
the torsion assembly is connected with the rotating shaft so as to apply torsion to the rotating shaft.
2. The suspension test stand of claim 1, wherein the control assembly further comprises:
the supporting leg is connected with the first bracket at one end;
the second support, the second support with the other end of supporting leg is connected, the controller set up in on the second support.
3. The suspension test stand of claim 2, wherein the control assembly further comprises:
and the two ends of the handle are connected with the side walls of the supporting legs.
4. The suspension test stand of claim 1, wherein the counterweight assembly further comprises:
the electric sliding table is arranged on the first support, and the first balancing weight is arranged on the electric sliding table.
5. The suspension test stand of claim 4,
the number of the counterweight components is four, the counterweight components are arranged along the circumferential direction of the first support, and the adjacent counterweight components are mutually perpendicular.
6. The suspension test stand of claim 1, wherein the first support comprises:
a framework;
the cover plate is connected with the framework and positioned above the framework, and the counterweight assembly is arranged on the cover plate;
the first mounting plate is connected with the framework and positioned below the framework;
and the second mounting plate is connected with the framework and positioned below the framework.
7. The suspension test stand of claim 6, further comprising:
and one end of the air spring is connected with the first mounting plate, and the other end of the air spring is used for mounting the suspension frame.
8. The suspension test stand of claim 1, wherein the torsion assembly comprises:
the supporting component is connected with the rotating shaft;
the sliding component is connected with the supporting component and can slide relative to the supporting component;
a second weight disposed on the sliding member.
9. The suspension test stand of claim 1, wherein the connection assembly includes:
a first pulley assembly mounted on the first bracket;
a second sheave assembly mounted on the base;
and one end of the pull rope is connected with the base, the other end of the pull rope is connected with the loading assembly, and the pull rope bypasses the first pulley assembly and the second pulley assembly.
10. The suspension test stand of claim 9,
the first pulley assembly comprises at least two pulleys, and the at least two pulleys are respectively positioned on two sides of the second pulley assembly.
11. The suspension test stand of claim 9, wherein the connection assembly further comprises:
and the third pulley assembly is arranged on the base, and the pull rope bypasses the lower part of the third pulley assembly.
12. The suspension test stand of claim 1, further comprising:
and the limiting assembly is arranged on the magnetic levitation track and positioned on one side of the levitation frame so as to limit the displacement of the levitation frame in the length direction of the magnetic levitation track.
13. The suspension test stand of claim 12, wherein the limit stop assembly comprises:
the mounting component is mounted on the magnetic suspension track;
the guide wheel is rotatably connected with the mounting assembly.
14. The suspension test stand of claim 13, wherein the mounting assembly comprises:
the third mounting plate is attached to the magnetic levitation track, and is provided with mounting holes which are matched with holes in the magnetic levitation track;
the first mounting seat is connected with the third mounting plate.
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| CN202010207679.7A CN111397925B (en) | 2020-03-23 | 2020-03-23 | Suspension frame test bed |
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| CN202010207679.7A CN111397925B (en) | 2020-03-23 | 2020-03-23 | Suspension frame test bed |
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