Trailer axle assembly testing device and testing method thereof

Abstract

The present invention relates to the technical field of axle balance test, and specifically discloses a trailer axle assembly test device and a test method thereof. The trailer axle assembly test device is applied to the dynamic balance test of the axle assembly, and comprises a trailer simulation compartment, a counterweight unit and a test sensor assembly. The transfer of the counterweight liquid between the first simulation compartment and the second simulation compartment is achieved by switching the postures of the first simulation compartment and the second simulation compartment in the counterweight unit. The simulation of the lateral center of gravity offset state and the longitudinal center of gravity offset state is achieved by the lateral deflection and longitudinal offset of the counterweight unit. The test sensor assembly is used to detect the dynamic balance parameters of the axle assembly under different simulation states, thereby effectively improving the dynamic balance test accuracy of the trailer axle assembly, and facilitating a comprehensive evaluation of the performance and safety of the axle assembly under different working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of axle balance testing, and more specifically, to a trailer axle assembly testing device and a testing method thereof. Background Art

[0002] As a key component for supporting and transmitting loads, the performance of trailer axles directly affects the safe operation of the vehicle. Due to the large size and high load requirements of trailers, axles need to bear significant dynamic loads. In actual driving, axle imbalance may cause unnecessary vibration and stress, which not only affects driving comfort, but also may cause premature wear of tires, suspension systems and axles themselves. In addition, imbalance problems may also cause a decline in vehicle handling performance and increase the risk of traffic accidents.

[0003] The dynamic balance test of the axle assembly is usually performed when the wheel hub is rotating, and the performance of the axle assembly is evaluated by measuring the dynamic balance parameters. In the dynamic balance test of the trailer axle assembly, the difference in dynamic balance parameters has a great correlation with the load of the axle assembly. The lateral and longitudinal load changes of the axle assembly will affect the stability of the axle assembly during operation. However, in the conventional dynamic balance test of the trailer axle assembly, it is difficult to simulate the complex load conditions caused by the center of gravity offset in different directions in actual use of the trailer axle assembly. Summary of the invention

[0004] In order to overcome the above technical problems, the present invention proposes a trailer axle assembly testing device and a testing method thereof.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A trailer axle assembly testing device is used for dynamic balance testing of an axle assembly, wherein the axle assembly comprises an axle frame and wheel hubs symmetrically distributed at both ends of the axle frame;

[0007] The test equipment includes:

[0008] A bracket, the top of which is provided with a traverse member that can be moved horizontally, the traverse member is connected to a lifting member that can be moved vertically, and the lifting member is connected to a flip member;

[0009] A trailer simulation compartment is arranged in the bracket and is used for assembly and connection with the axle frame of the axle assembly;

[0010] A counterweight unit, which is located in the trailer simulation compartment and connected to the flip member, comprises a first simulation chamber and a second simulation chamber for containing counterweight liquid, wherein a drainage plate is provided at the joint of the first simulation chamber and the second simulation chamber;

[0011] The supporting driving unit is provided with multiple groups, which are used to support the wheel hub and drive the wheel hub to rotate;

[0012] The test sensor assembly is adapted to the wheel hub and is used for dynamic balancing detection of the wheel hub.

[0013] As a further solution of the present invention: the counterweight unit is used to simulate a lateral center of gravity offset state and a longitudinal center of gravity offset state;

[0014] When simulating the lateral center of gravity offset state, the ballast liquid is located in the first simulation chamber, the first simulation chamber is in contact with the trailer simulation compartment, and the ballast unit is flipped back and forth laterally by the flipping piece, so that the ballast liquid in the first simulation chamber swings back and forth laterally, thereby simulating the lateral center of gravity offset change of the cargo loaded on the trailer under the action of inertia during acceleration and braking;

[0015] When simulating the longitudinal center of gravity offset state, the counterweight unit is first flipped laterally by the flipping piece until the second simulation chamber contacts the trailer simulation chamber, so that the counterweight liquid in the first simulation chamber is drained into the second simulation chamber through the drainage plate, and then the counterweight unit is flipped back and forth longitudinally by the flipping piece, so that the counterweight liquid in the second simulation chamber swings back and forth longitudinally, thereby simulating the change of longitudinal center of gravity offset when the trailer is loaded with unevenly distributed cargo.

[0016] As a further solution of the present invention: a number of partitions are equidistantly arranged in the second simulation chamber, and partition chambers are formed between adjacent partitions. Through grooves connecting adjacent partition chambers are opened on the partitions, and the through grooves are located on the side of the partition away from the bottom surface of the second simulation chamber.

[0017] As a further solution of the present invention: the guide plate is provided with a first one-way valve sheet and a second one-way valve sheet corresponding to each partition chamber, and each group of partition chambers is provided with a group of first one-way valve sheets and second one-way valve sheets correspondingly; the first one-way valve sheet is located on a side of the guide plate close to the bottom surface of the second simulation bin, and the second one-way valve sheet is located on a side of the guide plate away from the bottom surface of the second simulation bin;

[0018] The first one-way valve plate only allows the weight liquid in the first simulation chamber to flow into the second simulation chamber in one direction, and the second one-way valve plate only allows the weight liquid in the second simulation chamber to flow into the first simulation chamber in one direction.

[0019] As a further solution of the present invention: the transverse moving member comprises a transverse moving guide rail horizontally arranged on the top of the bracket, a transverse moving frame slidably arranged on the transverse moving guide rail, a transverse moving transmission belt rotatably mounted on the bracket, and a transverse moving motor fixed on the bracket, the transverse moving motor is used to drive the transverse moving transmission belt, and the transverse moving transmission belt is fixedly connected to the transverse moving frame through a transverse moving connecting seat; the lifting member is arranged on the transverse moving frame;

[0020] The lifting member includes a lifting guide rail vertically fixed on the transverse frame, a lifting frame slidably arranged on the lifting guide rail, and a lifting motor fixed on the transverse frame. The output end of the lifting motor is connected to a lifting screw rod, and the lifting screw rod is threadedly connected to the lifting frame. The flip member is arranged on the lifting frame.

[0021] As a further solution of the present invention: the flipping member includes a transverse flipping frame, the middle part of the transverse flipping frame is rotatably mounted on the lifting frame through a flipping shaft, a transverse flipping cylinder is hinged between the lifting frame and one end of the transverse flipping frame, and a mounting platform is fixed to one end of the transverse flipping frame away from the transverse flipping cylinder;

[0022] The mounting platform is provided with an avoidance groove, and vertical slide rails are symmetrically arranged at both ends of the avoidance groove. A vertical slider is slidably embedded in the vertical slide rail, and a card ball is connected to the bottom of the vertical slider through a cable, and a transverse slide rail adapted to the card ball is arranged on the counterweight unit; a longitudinal flip motor is fixed to the middle part of the mounting platform, and a longitudinal flip frame is connected to the output end of the longitudinal flip motor, and slide grooves are symmetrically arranged at both ends of the longitudinal flip frame, and a card pin adapted to the corresponding slide groove is arranged on the vertical slider.

[0023] As a further solution of the present invention: the trailer simulation compartment includes a compartment body, and multiple groups of connecting frames and air suspensions are arranged at the bottom of the compartment body. One side of the axle frame is hinged to the connecting frame, and the other side of the axle frame is connected to the bottom of the air suspension.

[0024] As a further solution of the present invention: the supporting driving unit includes a first support, multiple groups of guide rollers rotatably mounted on the first support, a driving belt rotatably sleeved on the guide rollers, and a driving motor fixedly mounted on the first support, the driving motor is used to drive one group of guide rollers, and the driving belt is rollingly adapted to the wheel hub.

[0025] As a further solution of the present invention: the test sensor assembly includes a second support fixed to the first support and an arc-shaped patch located above the second support, and a test sensor module is installed in the middle of the arc-shaped patch;

[0026] Adjustment rails are symmetrically arranged at both ends of the arc-shaped patch, and two groups of adjustment sliders are symmetrically and slidably installed in the adjustment rails. A connecting block is rotatably connected to the adjustment slider, and a guide rod that slides through the second support is vertically fixed at the bottom of the connecting block. A supporting spring is arranged between the connecting block and the second support, and the supporting spring is movably sleeved on the guide rod.

[0027] The present invention also discloses a testing method for a trailer axle assembly testing device, comprising the following steps:

[0028] S1. Install the axle assembly at the bottom of the trailer simulation compartment, place the support drive unit at the bottom of each wheel hub, and connect the test sensor assembly to the corresponding wheel hub;

[0029] S2, adjusting the counterweight unit to the first simulation chamber to contact the trailer simulation chamber, driving the counterweight unit to flip back and forth laterally through the flipping member, causing the counterweight liquid in the first simulation chamber to sway back and forth laterally, simulating the lateral center of gravity offset state, and detecting the dynamic balance parameters of the wheel hub under the lateral center of gravity offset simulation state through the test sensor assembly;

[0030] S3. Switch the counterweight unit to the second simulation chamber to contact the trailer simulation chamber, and drive the counterweight unit to flip back and forth longitudinally through the flipping piece, so as to cause the counterweight liquid in the second simulation chamber to swing back and forth longitudinally, simulating the longitudinal center of gravity offset state, and detect the dynamic balance parameters of the wheel hub under the longitudinal center of gravity offset simulation state through the test sensor assembly.

[0031] Beneficial effects of the present invention:

[0032] The transfer of the counterweight liquid between the first simulation chamber and the second simulation chamber is achieved by switching the postures of the first simulation chamber and the second simulation chamber in the counterweight unit, and the counterweight unit is driven to perform lateral deflection and longitudinal offset by the flipping part, thereby realizing the simulation of the lateral center of gravity offset state and the longitudinal center of gravity offset state, and the test sensor assembly is used to detect the dynamic balance parameters of the axle assembly under different simulation states, which effectively improves the dynamic balance test accuracy of the trailer axle assembly, and is conducive to a comprehensive evaluation of the performance and safety of the axle assembly under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] Figure 1 It is a three-dimensional schematic diagram of a trailer axle assembly testing device of the present invention;

[0035] Figure 2 It is a stereoscopic schematic diagram of another viewing angle of a trailer axle assembly testing device of the present invention;

[0036] Figure 3 It is a structural schematic diagram of a bracket in a trailer axle assembly testing device of the present invention;

[0037] Figure 4 A cross-sectional view of a counterweight unit in a trailer axle assembly testing device of the present invention;

[0038] Figure 5 A cross-sectional view of a counterweight unit in a trailer axle assembly testing device of the present invention from another perspective;

[0039] Figure 6It is a schematic diagram of the initial state of the counterweight unit in the trailer axle assembly testing equipment of the present invention;

[0040] Figure 7 It is a schematic diagram of the state when the balancing liquid flows into the second simulation chamber in the trailer axle assembly testing equipment of the present invention;

[0041] Figure 8 It is a schematic diagram of the state when the balancing weight liquid flows into the first simulation chamber in the trailer axle assembly testing equipment of the present invention;

[0042] Fig. 9 It is a structural schematic diagram of a transverse moving member in a trailer axle assembly testing device of the present invention;

[0043] Fig.10 It is a structural schematic diagram of a longitudinal moving part and a turning part in a trailer axle assembly testing device of the present invention;

[0044] Fig.11 It is a structural schematic diagram of a flipping piece and a counterweight unit of a trailer axle assembly testing device of the present invention;

[0045] Fig.12 for Fig.11 Enlarged view of point A in the middle;

[0046] Fig.13 It is a structural schematic diagram of an axle assembly and a trailer simulation compartment in a trailer axle assembly testing device of the present invention;

[0047] Fig.14 It is a structural schematic diagram of a support drive unit in a trailer axle assembly testing device of the present invention;

[0048] Fig.15 It is a structural schematic diagram of a test sensor assembly in a trailer axle assembly test device of the present invention;

[0049] Fig.16 for Fig.15 Enlarged view of point B in the middle.

[0050] In the figure:

[0051] 100, bracket; 110, transverse member; 111, transverse guide rail; 112, transverse frame; 113, transverse motor; 114, transverse transmission belt; 115, transverse connecting seat; 120, lifting member; 121, lifting guide rail; 122, lifting frame; 123, lifting motor; 130, flip member; 131, transverse flip frame; 132, flip shaft; 133, transverse flip cylinder; 134, mounting table; 1341, avoidance groove; 1342, vertical slide rail; 1343, vertical slider; 1344, cable; 1345, card ball; 1346, transverse slide rail; 1347, longitudinal flip motor; 1348, longitudinal flip frame; 1349, slide groove; 13410, card pin;

[0052] 200, trailer simulation compartment; 210, compartment body; 220, connecting frame; 230, air suspension;

[0053] 300, counterweight unit; 310, first simulation chamber; 320, second simulation chamber; 330, guide plate; 340, partition; 350, partition chamber; 360, first one-way valve plate; 370, second one-way valve plate; 380, through groove; 390, counterweight liquid;

[0054] 400, axle assembly; 410, axle frame; 420, wheel hub;

[0055] 500, support drive unit; 510, first support; 520, guide roller; 530, drive belt; 540, drive motor;

[0056] 600, test sensor assembly; 610, second support; 620, guide rod; 630, arc patch; 631, adjustment rail; 632, adjustment slider; 633, connection block; 640, support spring; 650, test sensor module. DETAILED DESCRIPTION

[0057] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0058] See also Figure 1 and Figure 2 , the first aspect of the present invention discloses a trailer axle assembly testing device, which is applied to a dynamic balance test of an axle assembly 400, wherein the axle assembly 400 includes an axle frame 410 and wheel hubs 420 symmetrically distributed at both ends of the axle frame 410;

[0059] The test equipment includes a bracket 100, a trailer simulation compartment 200, a counterweight unit 300, a support drive unit 500 and a test sensor assembly 600;

[0060] See also Figure 3 , a traverse member 110 that can be translated is disposed on the top of the bracket 100, a lifting member 120 that can be vertically moved is connected to the traverse member 110, and a flip member 130 is connected to the lifting member 120;

[0061] The trailer simulation compartment 200 is disposed in the bracket 100 and is used for assembly and connection with the axle frame 410 of the axle assembly 400;

[0062] See also Figure 4 and Figure 5 The counterweight unit 300 is located in the trailer simulation compartment 200 and is connected to the flip member 130, and includes a first simulation chamber 310 and a second simulation chamber 320 for containing a counterweight liquid 390. The bottom surface of the first simulation chamber 310 is an arc surface, and the bottom surface of the second simulation chamber 320 is a plane and tangent to the bottom surface of the first simulation chamber 310. A drainage plate 330 is provided at the joint of the first simulation chamber 310 and the second simulation chamber 320;

[0063] The supporting driving unit 500 is provided with multiple groups, and is used to support the wheel hub 420 and drive the wheel hub 420 to rotate;

[0064] The test sensor assembly 600 is adapted to the wheel hub 420 and is used to perform dynamic balance detection on the wheel hub 420 .

[0065] Specifically, the axle frame 410 of the axle assembly 400 is installed to the bottom of the trailer simulation compartment 200, and the support drive unit 500 is placed under the wheel hub 420 of each axle assembly 400. The axle assembly 400 and the trailer simulation compartment 200 are supported and positioned by the support drive unit 500, and the support drive unit 500 can provide drive for the wheel hub 420 to drive the wheel hub 420 to rotate relative to the trailer simulation compartment 200, thereby simulating the dynamic driving environment of the trailer; a test sensor assembly 600 is correspondingly installed at each set of wheel hubs 420 to detect the dynamic balance parameters of the axle assembly 400;

[0066] The counterweight unit 300 is placed in the trailer simulation compartment 200. The counterweight unit 300 can simulate the lateral center of gravity offset state during the trailer acceleration and deceleration process and the longitudinal center of gravity offset state when the load is unevenly distributed;

[0067] Specifically, when simulating the lateral center of gravity offset state, the balancing weight liquid 390 is located in the first simulation chamber 310, and the first simulation chamber 310 is in contact with the trailer simulation compartment 200. The balancing weight unit 300 is flipped back and forth laterally by the flipping member 130, so that the balancing weight liquid 390 in the first simulation chamber 310 is swung back and forth laterally, thereby simulating the lateral center of gravity offset change of the cargo loaded on the trailer under the inertia during the acceleration and braking process. The test sensor assembly 600 is used to perform dynamic balance parameter detection on the axle assembly 400 at different positions of the front and rear ends of the trailer simulation compartment 200 in the simulation state;

[0068] When simulating the longitudinal center of gravity offset state, the counterweight unit 300 is first flipped horizontally by the flipping piece 130 until the second simulation chamber 320 contacts the trailer simulation chamber 200, so that the counterweight liquid 390 in the first simulation chamber 310 is drained into the second simulation chamber 320 through the drain plate 330, and then the counterweight unit 300 is flipped back and forth longitudinally by the flipping piece 130, so that the counterweight liquid 390 in the second simulation chamber 320 swings back and forth longitudinally, thereby simulating the longitudinal center of gravity offset change when the trailer is loaded with unevenly distributed cargo, and the test sensor assembly 600 is used to perform dynamic balancing parameter detection on the axle assembly 400 at different positions on the left and right sides of the trailer simulation chamber 200 under the simulated state.

[0069] It should be noted that the above-mentioned ballast liquid 390 is intended to simulate the loading of cargo. Considering the use cost of the ballast liquid 390 , water is usually directly used as the ballast liquid 390 .

[0070] In one embodiment, see Figure 4 and Figure 5 In order to facilitate the adjustment of the longitudinal distribution state of the weight liquid 390 in the second simulation chamber 320, a plurality of partitions 340 are equidistantly arranged in the second simulation chamber 320, and a partition chamber 350 is formed between adjacent partitions 340. A through groove 380 connecting adjacent partition chambers 350 is opened on the partition 340, and the through groove 380 is located on the side of the partition 340 away from the bottom surface of the second simulation chamber 320;

[0071] When the counterweight unit 300 is flipped laterally so that the bottom surface of the second simulated bin 320 contacts the trailer simulated compartment 200, the counterweight liquid 390 in the first simulated bin 310 is drained into the second simulated bin 320 through the drainage plate 330. At this time, the counterweight liquid 390 is evenly distributed in each partition chamber 350. When the counterweight unit 300 is flipped longitudinally, the counterweight liquid 390 in the partition chamber 350 at the raised end of the second simulated bin 320 can be gradually transferred to the partition chamber 350 at the other end through the through groove 380 on the partition 340, thereby realizing the longitudinal distribution adjustment of the counterweight liquid 390 in the second simulated bin 320 to simulate the longitudinal center of gravity offset state when the cargo is unevenly distributed.

[0072] For further information, see Figure 4 and Figure 5 In order to transfer the balancing liquid 390 between the first simulation chamber 310 and the second simulation chamber 320, the guide plate 330 is provided with a first one-way valve plate 360 ​​and a second one-way valve plate 370 corresponding to each separation chamber 350, and each group of separation chambers 350 is correspondingly provided with a group of first one-way valve plates 360 and second one-way valve plates 370; the first one-way valve plate 360 ​​is located on the side of the guide plate 330 close to the bottom surface of the second simulation chamber 320, and the second one-way valve plate 370 is located on the side of the guide plate 330 away from the bottom surface of the second simulation chamber 320; wherein the first one-way valve plate 360 ​​only allows the balancing liquid 390 in the first simulation chamber 310 to flow into the second simulation chamber 320 in one direction, and the second one-way valve plate 370 only allows the balancing liquid 390 in the second simulation chamber 320 to flow into the first simulation chamber 310 in one direction.

[0073] Specifically, see Figure 6 and Figure 7 When the flipping member 130 flips the counterweight unit 300 until the second simulation chamber 320 contacts the trailer simulation compartment 200, the counterweight liquid 390 in the first simulation chamber 310 flows into the corresponding separation chamber 350 of the second simulation chamber 320 through each first one-way valve plate 360, thereby realizing the transfer of the counterweight liquid 390 from the first simulation chamber 310 to the second simulation chamber 320;

[0074] It should be noted that since the first one-way valve plate 360 ​​is located on the side of the guide plate 330 close to the bottom surface of the second simulation chamber 320, in order to ensure that the ballast liquid 390 can be completely transferred from the first simulation chamber 310 to the second simulation chamber 320, the flipping angle of the ballast unit 300 can be increased as much as possible so that the ballast liquid 390 can completely flow into the second simulation chamber 320 under the action of the height difference. After the ballast liquid 390 is completely transferred, the second simulation chamber 320 is adjusted to have its bottom surface fit with the trailer simulation chamber 200.

[0075] See also Figure 7 and Figure 8 When the flipping member 130 flips the counterweight unit 300 again until the first simulated chamber 310 contacts the trailer simulated compartment 200, the counterweight liquid 390 in each partition chamber 350 in the second simulated chamber 320 flows into the first simulated chamber 310 through the corresponding second one-way valve plate 370, thereby realizing the transfer of the counterweight liquid 390 from the second simulated chamber 320 to the first simulated chamber 310.

[0076] It should be noted that, when simulating the lateral center of gravity offset state, the flip member 130 only drives the counterweight unit 300 to flip back and forth within a certain amplitude range, and the specific amplitude can be set according to actual needs, so as to achieve the effect of the first simulation chamber 310 lateral reciprocating shaking. At this time, even if the counterweight liquid 390 in the first simulation chamber 310 enters the second simulation chamber 320 through the first one-way valve plate 360 ​​under the action of inertia, it can then flow back to the first simulation chamber 310 from the second one-way valve plate 370 again under the action of gravity, so it will not interfere with the simulation of the lateral center of gravity offset state.

[0077] When simulating the longitudinal center of gravity offset state, the flip member 130 only drives the counterweight unit 300 to deflect longitudinally, thereby achieving the effect of longitudinal back and forth deflection of the second simulation chamber 320. Since the second one-way valve plate 370 is set away from the bottom surface of the second simulation chamber 320, even if the second simulation chamber 320 deflects longitudinally, the counterweight liquid 390 in each separation chamber 350 will not reach the height of the second one-way valve plate 370, thereby preventing the counterweight liquid 390 from flowing back into the first simulation chamber 310.

[0078] In yet another embodiment, see Fig. 9 The transverse member 110 includes a transverse guide rail 111 horizontally arranged on the top of the bracket 100, a transverse frame 112 slidably arranged on the transverse guide rail 111, a transverse transmission belt 114 rotatably installed on the bracket 100, and a transverse motor 113 fixed on the bracket 100, wherein the transverse motor 113 is used to drive the transverse transmission belt 114, and the transverse transmission belt 114 is fixedly connected to the transverse frame 112 via a transverse connecting seat 115; the lifting member 120 is arranged on the transverse frame 112;

[0079] Specifically, the transverse motor 113 drives the transverse transmission belt 114 to move, and the transverse transmission belt 114 is used to pull the transverse frame 112, driving the transverse frame 112 to move horizontally along the transverse guide rail 111, so as to drive the lower lifting member 120, the flip member 130 and the counterweight unit 300 to move horizontally as a whole, thereby adjusting the different placement positions of the counterweight unit 300 on the trailer simulation compartment 200, and being able to adapt to the dynamic balance test of trailer simulation compartments 200 of different lengths and axle assemblies 400 at different parts of the trailer simulation compartment 200.

[0080] For further information, see Fig.10 The lifting member 120 includes a lifting rail 121 vertically fixed on the transverse frame 112, a lifting frame 122 slidably arranged on the lifting rail 121, and a lifting motor 123 fixed on the transverse frame 112. The output end of the lifting motor 123 is connected to a lifting screw (not shown in the figure), and the lifting screw is threadedly connected to the lifting frame 122; the flip member 130 is arranged on the lifting frame 122;

[0081] Specifically, the lifting motor 123 drives the lifting screw to rotate, thereby driving the lifting frame 122 to move up and down along the lifting guide rail 121, so as to drive the lower flipping member 130 and the counterweight unit 300 to move up and down as a whole. Through the cooperation between the lifting member 120 and the flipping member 130, the switching of different postures of the counterweight unit 300 is realized.

[0082] It should be noted that when the flipping member 130 alone is not enough to flip the counterweight unit 300 to a specified position, the lifting member 120 can be used to adjust the height, thereby compensating for the stroke of the flipping member 130 to ensure that the counterweight unit 300 can smoothly switch between different postures.

[0083] For further information, see Fig.11 The flip member 130 includes a transverse flip frame 131, the middle part of which is rotatably mounted on the lifting frame 122 via a flip shaft 132, a transverse flip cylinder 133 is hinged between the lifting frame 122 and one end of the transverse flip frame 131, and a mounting platform 134 is fixed to one end of the transverse flip frame 131 away from the transverse flip cylinder 133;

[0084] See also Fig.12 The mounting platform 134 is provided with an avoidance groove 1341, and vertical slide rails 1342 are symmetrically arranged at both ends of the avoidance groove 1341. A vertical slider 1343 is slidably embedded in the vertical slide rail 1342. A card ball 1345 is connected to the bottom of the vertical slider 1343 through a cable 1344. A transverse slide rail 1346 adapted to the card ball 1345 is arranged on the counterweight unit 300; a longitudinal flip motor 1347 is fixed to the middle of the mounting platform 134, and a longitudinal flip frame 1348 is connected to the output end of the longitudinal flip motor 1347. Slide grooves 1349 are symmetrically arranged at both ends of the longitudinal flip frame 1348, and a card pin 13410 adapted to the corresponding slide groove 1349 is arranged on the vertical slider 1343;

[0085] Specifically, when simulating the lateral center of gravity offset state, the lateral flip cylinder 133 pushes one end of the lateral flip frame 131 downward, so that the lateral flip frame 131 rotates around the flip axis 132, driving the other end of the lateral flip frame 131 and the mounting platform 134 to tilt upward. Under the traction of the cable 1344, the card ball 1345 moves along the corresponding lateral slide rail 1346, thereby driving the counterweight unit 300 to deflect laterally. By reciprocatingly adjusting the lateral flip cylinder 133, the counterweight unit 300 can be driven to flip back and forth laterally, so as to realize the lateral reciprocating shaking of the counterweight liquid 390 in the first simulation chamber 310, thereby simulating the lateral center of gravity offset state;

[0086] When simulating the longitudinal center of gravity offset state, the mounting platform 134 is firstly driven to tilt upward by the transverse flip cylinder 133, so that the card ball 1345 slides to the end of the transverse slide rail 1346 away from the second simulation bin 320, and then the mounting platform 134 continues to swing upward, and the cable 1344 can be used to lift the end of the first simulation bin 310 away from the second simulation bin 320 upward until the bottom surface of the second simulation bin 320 contacts the trailer simulation compartment 200, so as to realize the ballast liquid 390 from the first simulation bin 310 to the second simulation bin 320. 10 is transferred to the second simulation bin 320; then the longitudinal flip motor 1347 drives the longitudinal flip frame 1348 to rotate, and the latch pin 13410 slides in the corresponding slide groove 1349, driving the vertical slider 1343 on the same side of the upwardly tilted end of the longitudinal flip frame 1348 to slide up synchronously, and the side cable 1344 can be used to lift one end of the second simulation bin 320 upward to realize the longitudinal transfer of the balancing liquid 390 in the second simulation bin 320, thereby simulating the longitudinal center of gravity offset state.

[0087] In further embodiments, see Fig.13 The trailer simulation compartment 200 includes a compartment 210, a plurality of connecting frames 220 and an air suspension 230 are arranged at the bottom of the compartment 210, one side of the axle frame 410 is hinged to the connecting frame 220, and the other side of the axle frame 410 is connected to the bottom of the air suspension 230;

[0088] When the trailer simulation compartment 200 and the counterweight unit 300 apply load to the axle assembly 400, as the position and state of the counterweight unit 300 change, the load of the axle frame 410 will also change. During the dynamic balancing test, the air suspension 230 can be used to buffer the axle assembly 400.

[0089] See also Fig.14 The support driving unit 500 includes a first support 510, a plurality of guide rollers 520 rotatably mounted on the first support 510, a driving belt 530 rotatably sleeved on the guide rollers 520, and a driving motor 540 fixedly mounted on the first support 510, wherein the driving motor 540 is used to drive one of the guide rollers 520, and the driving belt 530 is rollingly adapted to the wheel hub 420;

[0090] Specifically, the wheel hub 420 of each group of axle assemblies 400 is placed on the corresponding drive belt 530, and one group of guide rollers 520 is driven to rotate by the drive motor 540, thereby driving the drive belt 530 to move, and the friction force between the drive belt 530 and the wheel hub 420 is used to drive the wheel hub 420 to rotate, so as to simulate the dynamic driving environment of the axle assembly 400.

[0091] It should be noted that the wheel hub 420 is supported and driven by the drive belt 530. The drive belt 530 can adaptively bend and deform according to the contour of the wheel hub 420 and the load change. When the entire axle assembly 400 undergoes longitudinal deflection, the drive belt 530 can also be twisted synchronously, thereby ensuring that the drive belt 530 is always stably fitted with the wheel hub 420. It can adapt to wheel hubs 420 of different specifications and test conditions of different states, thereby ensuring the stability of the dynamic balancing test of the axle assembly 400.

[0092] For further information, see Fig.15 and Fig.16 The test sensor assembly 600 includes a second support 610 fixed to the first support 510 and an arc patch 630 located above the second support 610, and a test sensor module 650 is installed in the middle of the arc patch 630; adjustment rails 631 are symmetrically arranged at both ends of the arc patch 630, and two groups of adjustment sliders 632 are symmetrically slidably installed in the adjustment rails 631, and a connecting block 633 is rotatably connected to the adjustment slider 632, and a guide rod 620 that slides through the second support 610 is vertically fixed at the bottom of the connecting block 633, and a supporting spring 640 is arranged between the connecting block 633 and the second support 610, and the supporting spring 640 is movably sleeved on the guide rod 620;

[0093] Specifically, under the elastic force of the supporting spring 640, the arc patch 630 always fits the outer contour of the wheel hub 420, and the dynamic balance parameters of the wheel hub 420 in the rotating state are detected by the test sensor module 650 on the arc patch 630;

[0094] When the axle assembly 400 deflects longitudinally, the wheel hub 420 also deflects accordingly. At this time, there is a certain angle between the axis of the wheel hub 420 and the horizontal plane. Under this working condition, the deflected wheel hub 420 presses down the arc patch 630, thereby driving the two sets of adjustment sliders 632 in the adjustment slide rail 631 to slide adaptively, and then driving the corresponding guide rod 620 to slide vertically, so as to ensure that the arc patch 630 is always consistent with the deflection angle of the wheel hub 420, so that the arc patch 630 is always stably fitted with the outer contour of the wheel hub 420, thereby ensuring the stability of the test sensor module 650 in detecting dynamic balance parameters.

[0095] It should be noted that the above-mentioned test sensor module 650 includes an acceleration sensor, a vibration velocity sensor, a displacement sensor, a photoelectric sensor, a force sensor and a torque sensor; among them, the acceleration sensor is used to measure the acceleration generated when the wheel hub 420 rotates; the vibration velocity sensor is used to measure the vibration velocity of the wheel hub 420 to evaluate the intensity of the vibration and potential imbalance problems; the displacement sensor is used to measure the displacement of the wheel hub 420 relative to its rotation center; the photoelectric sensor is used to detect the marks on the wheel hub 420 to calculate the rotation angle and speed to assist in dynamic balancing testing; the force sensor is used to measure the force acting on the wheel hub 420; the torque sensor is used to measure the torque applied to the wheel hub 420; the above-mentioned sensors work together to provide comprehensive data of the trailer axle in the dynamic balancing test, including key parameters such as force, displacement, velocity, acceleration and torque, so as to comprehensively evaluate the performance and safety of the axle assembly 400.

[0096] A second aspect of the present invention discloses a testing method for a trailer axle assembly testing device, comprising the following steps:

[0097] S1. Install the axle assembly 400 at the bottom of the trailer simulation compartment 200, place the support drive unit 500 at the bottom of each wheel hub 420, and adapt and connect the test sensor assembly 600 to the corresponding wheel hub 420;

[0098] S2, adjusting the counterweight unit 300 to the first simulation chamber 310 in contact with the trailer simulation chamber 200, driving the counterweight unit 300 to flip back and forth laterally through the flipping member 130, causing the counterweight liquid 390 in the first simulation chamber 310 to sway back and forth laterally, simulating a lateral center of gravity offset state, and detecting the dynamic balance parameters of the wheel hub 420 in the lateral center of gravity offset simulation state through the test sensor assembly 600;

[0099] S3. Switch the counterweight unit 300 to the second simulation chamber 320 to contact the trailer simulation chamber 200, and drive the counterweight unit 300 to flip back and forth longitudinally through the flipping member 130, so as to cause the counterweight liquid 390 in the second simulation chamber 320 to shake back and forth longitudinally, simulating the longitudinal center of gravity offset state, and detect the dynamic balance parameters of the wheel hub 420 under the longitudinal center of gravity offset simulation state through the test sensor assembly 600.

[0100] The specific implementation methods of this embodiment are described above, but this embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms inspired by this embodiment, all of which are within the protection of this embodiment.

Claims

1. A trailer axle assembly testing device, used for dynamic balancing test of an axle assembly (400), wherein the axle assembly (400) comprises an axle frame (410) and wheel hubs (420) symmetrically distributed at both ends of the axle frame (410); It is characterized in that The test equipment includes: A bracket (100) having a top provided with a traverse member (110) that can be moved in translation, the traverse member (110) being connected to a lifting member (120) that can be moved vertically, and the lifting member (120) being connected to a flip member (130); A trailer simulation compartment (200) is disposed in the bracket (100) and is used for assembly and connection with an axle frame (410) of the axle assembly (400); A counterweight unit (300) is located in the trailer simulation compartment (200) and connected to the flip member (130), comprising a first simulation chamber (310) and a second simulation chamber (320) for containing a counterweight liquid (390), wherein a drainage plate (330) is provided at the joint between the first simulation chamber (310) and the second simulation chamber (320); A plurality of support drive units (500) are provided, and are used to support the wheel hub (420) and drive the wheel hub (420) to rotate; The test sensor assembly (600) is adapted to the wheel hub (420) and is used to perform dynamic balancing detection on the wheel hub (420); The counterweight unit (300) is used to simulate a lateral center of gravity offset state and a longitudinal center of gravity offset state; When simulating a lateral center of gravity offset state, the balancing fluid (390) is located in the first simulation chamber (310), the first simulation chamber (310) is in contact with the trailer simulation compartment (200), and the balancing fluid (390) is caused to sway laterally back and forth by means of the flipping member (130), thereby simulating a lateral center of gravity offset change of the cargo loaded on the trailer under the action of inertia during acceleration and braking; When simulating a longitudinal center of gravity offset state, the counterweight unit (300) is first flipped horizontally by the flipping member (130) until the second simulation chamber (320) contacts the trailer simulation chamber (200), so that the counterweight liquid (390) in the first simulation chamber (310) is drained into the second simulation chamber (320) through the drainage plate (330), and then the counterweight unit (300) is flipped back and forth longitudinally by the flipping member (130), so that the counterweight liquid (390) in the second simulation chamber (320) sways back and forth longitudinally, thereby simulating a longitudinal center of gravity offset change when the cargo loaded on the trailer is unevenly distributed; A plurality of partitions (340) are arranged at equal intervals in the second simulation chamber (320), and a partition chamber (350) is formed between adjacent partitions (340). A through groove (380) is provided on the partition (340) for connecting adjacent partition chambers (350), and the through groove (380) is located on a side of the partition (340) away from the bottom surface of the second simulation chamber (320); The guide plate (330) is provided with a first one-way valve sheet (360) and a second one-way valve sheet (370) corresponding to each of the partition chambers (350), and each group of partition chambers (350) is provided with a group of the first one-way valve sheet (360) and the second one-way valve sheet (370) correspondingly; the first one-way valve sheet (360) is located on a side of the guide plate (330) close to the bottom surface of the second simulation chamber (320), and the second one-way valve sheet (370) is located on a side of the guide plate (330) away from the bottom surface of the second simulation chamber (320); The first one-way valve plate (360) only allows the weight liquid (390) in the first simulation chamber (310) to flow into the second simulation chamber (320) in one direction, and the second one-way valve plate (370) only allows the weight liquid (390) in the second simulation chamber (320) to flow into the first simulation chamber (310) in one direction.

2. A trailer axle assembly testing device according to claim 1, characterized in that: The transverse moving member (110) comprises a transverse moving guide rail (111) horizontally arranged on the top of the bracket (100), a transverse moving frame (112) slidably arranged on the transverse moving guide rail (111), a transverse moving transmission belt (114) rotatably mounted on the bracket (100), and a transverse moving motor (113) fixed on the bracket (100), wherein the transverse moving motor (113) is used to drive the transverse moving transmission belt (114), and the transverse moving transmission belt (114) is fixedly connected to the transverse moving frame (112) via a transverse moving connecting seat (115); the lifting member (120) is arranged on the transverse moving frame (112); The lifting member (120) comprises a lifting guide rail (121) vertically fixed on the transverse frame (112), a lifting frame (122) slidably arranged on the lifting guide rail (121), and a lifting motor (123) fixed on the transverse frame (112); an output end of the lifting motor (123) is connected to a lifting screw rod, and the lifting screw rod is threadedly connected to the lifting frame (122); the flip member (130) is arranged on the lifting frame (122).

3. A trailer axle assembly testing device according to claim 2, characterized in that: The flipping member (130) comprises a transverse flipping frame (131), the middle portion of the transverse flipping frame (131) being rotatably mounted on the lifting frame (122) via a flipping shaft (132), a transverse flipping cylinder (133) being hinged between the lifting frame (122) and one end of the transverse flipping frame (131), and a mounting platform (134) being fixed to one end of the transverse flipping frame (131) away from the transverse flipping cylinder (133); The mounting platform (134) is provided with an avoidance groove (1341), and vertical slide rails (1342) are symmetrically arranged at both ends of the avoidance groove (1341). A vertical slider (1343) is slidably embedded in the vertical slide rail (1342), and a locking ball (1345) is connected to the bottom of the vertical slider (1343) through a cable (1344). The counterweight unit (300) is provided with a transverse slide rail (1346) adapted to the locking ball (1345). A longitudinal flip motor (1347) is fixed in the middle of the mounting platform (134), and an output end of the longitudinal flip motor (1347) is connected to a longitudinal flip frame (1348). Slide grooves (1349) are symmetrically arranged at both ends of the longitudinal flip frame (1348), and a locking pin (13410) adapted to the corresponding slide groove (1349) is provided on the vertical slider (1343).

4. The trailer axle assembly testing device according to claim 1, characterized in that: The trailer simulation compartment (200) comprises a compartment body (210), a plurality of groups of connecting frames (220) and air suspension (230) are arranged at the bottom of the compartment body (210), one side of the axle frame (410) is hinged to the connecting frame (220), and the other side of the axle frame (410) is connected to the bottom of the air suspension (230).

5. The trailer axle assembly testing device according to claim 4, characterized in that: The support drive unit (500) comprises a first support (510), a plurality of guide rollers (520) rotatably mounted on the first support (510), a drive belt (530) rotatably sleeved on the guide rollers (520), and a drive motor (540) fixedly mounted on the first support (510), wherein the drive motor (540) is used to drive one of the guide rollers (520), and the drive belt (530) is rollingly adapted to the wheel hub (420).

6. The trailer axle assembly testing device according to claim 5, characterized in that: The test sensor assembly (600) comprises a second support (610) fixed to the first support (510) and an arc-shaped patch (630) located above the second support (610), wherein a test sensor module (650) is installed in the middle of the arc-shaped patch (630); Adjustment rails (631) are symmetrically arranged at both ends of the arc-shaped patch (630), two groups of adjustment sliders (632) are symmetrically slidably installed in the adjustment rails (631), a connection block (633) is rotatably connected to the adjustment slider (632), a guide rod (620) that slides through the second support (610) is vertically fixed to the bottom of the connection block (633), and a support spring (640) is arranged between the connection block (633) and the second support (610), and the support spring (640) is movably sleeved on the guide rod (620).

7. A testing method for a trailer axle assembly testing device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, installing the axle assembly (400) at the bottom of the trailer simulation compartment (200), placing a support drive unit (500) at the bottom of each wheel hub (420), and adapting and connecting the test sensor assembly (600) to the corresponding wheel hub (420); S2, adjusting the counterweight unit (300) so that the first simulation chamber (310) contacts the trailer simulation chamber (200), driving the counterweight unit (300) to flip back and forth laterally through the flipping member (130), causing the counterweight liquid (390) in the first simulation chamber (310) to sway back and forth laterally, simulating a lateral center of gravity offset state, and detecting the dynamic balance parameters of the wheel hub (420) in the lateral center of gravity offset simulation state through the test sensor assembly (600); S3, switching the counterweight unit (300) to the second simulation chamber (320) to contact the trailer simulation chamber (200), driving the counterweight unit (300) to flip back and forth longitudinally through the flipping member (130), causing the counterweight liquid (390) in the second simulation chamber (320) to sway back and forth longitudinally, simulating a longitudinal center of gravity offset state, and detecting the dynamic balance parameters of the wheel hub (420) in the longitudinal center of gravity offset simulation state through the test sensor assembly (600).

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