Vibration test equipment and vehicle test system

Abstract

The present invention relates to the field of vehicle technology, and specifically discloses a vibration test device and a vehicle test system. The vibration test device includes a frame, a counterweight assembly and an actuating assembly. The counterweight assembly is slidably connected to the frame along a first direction. The counterweight assembly is used to connect to one end of the test piece. The actuating assembly is arranged on the frame. The actuating assembly is used to connect to the other end of the test piece and drive the test piece to move back and forth along the first direction. The counterweight assembly can simulate the weight borne by the test piece. The actuating assembly can generate vibration by moving back and forth along the first direction. The vibration force of the test piece under actual working conditions is simulated based on the road spectrum. The test piece vibrates with the actuating assembly and drives the counterweight assembly to move, simulating the working state of the test piece under actual working conditions. The test piece can be independently tested, avoiding the use of components such as springs and brackets in the suspension system and components such as the cab or frame for accompanying testing, thereby reducing the difficulty of test installation.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a vibration test device and a vehicle test system. Background Art

[0002] Shock absorbers are commonly used components in commercial vehicles and other vehicles. They are used to suppress oscillations caused by rebound after spring absorption and impact from the road surface. Before use, the shock absorbers need to be tested for various performance indicators during the bench test phase.

[0003] In related technologies, shock absorbers are installed at various vibration-damping locations on a vehicle, such as the cab suspension system or the wheel-to-frame suspension system of a commercial vehicle. In addition to shock absorbers, the suspension system also includes springs, brackets, and other components. During vibration testing, the suspension system, along with the corresponding cab or frame, is typically placed on a vibration table. Vibration is applied to the table to measure the stress and performance of the suspension system, thereby determining the compliance of the shock absorber.

[0004] However, vibration testing requires the use of components such as springs and brackets in the suspension system, as well as components such as the cab or frame. This not only makes the structure complex and increases the difficulty of test installation, but also makes it difficult to examine and verify the performance parameters of the shock absorber itself. Summary of the Invention

[0005] The purpose of the present invention is to provide a vibration test device and a vehicle test system to solve the problems in the related art that vibration tests require the use of springs, brackets and other components in the suspension system as well as components such as the cab or frame for accompanying testing, resulting in complex structures, great difficulty in test installation, and difficulty in examining and verifying the performance parameters of the shock absorber itself.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a vibration testing device, comprising:

[0008] frame;

[0009] a counterweight assembly, the counterweight assembly being slidably connected to the frame along a first direction, the counterweight assembly being used to connect to one end of the test piece;

[0010] An actuating assembly is provided on the frame, and is used to be connected to the other end of the test piece and drive the test piece to move back and forth along the first direction.

[0011] In one embodiment, the counterweight assembly includes:

[0012] a counterweight mechanism, the counterweight mechanism being slidably connected to the frame;

[0013] A first sling is provided on the counterweight mechanism, the first sling is used for being rotatably connected to the test piece, a rotation axis of the first sling and the test piece is along a second direction, and the second direction intersects the first direction.

[0014] In one embodiment, the actuating assembly comprises:

[0015] an actuator connected to the frame;

[0016] A second sling is used for being rotatably connected to the test piece, wherein the rotation axis of the second sling and the test piece is along a third direction, and the third direction, the second direction and the first direction intersect each other.

[0017] In one embodiment, the actuating assembly further includes a plurality of fixing clamps, which are used to circumferentially limit the actuator; the fixing clamps are slidably connected to the actuator, and the fixing clamps are arranged circumferentially along the actuator; the fixing clamps are slidably connected to the frame, and a plurality of the fixing clamps are arranged along the first direction.

[0018] In one embodiment, the vibration testing device further includes a guiding mechanism, which includes a first guide rail and a slider, wherein the first guide rail is arranged on the frame along the first direction, and the slider is arranged on the counterweight assembly and / or the fixing fixture, and the slider can slide along the first guide rail.

[0019] In one embodiment, the guide mechanism further includes a second guide rail and a locking member, the second guide rail is arranged on the frame along the first direction, the locking member is arranged on the counterweight assembly and / or the fixing clamp, the locking member is detachably connected to the second guide rail, and the locking member is used to fix the counterweight assembly and the second guide rail or fix the fixing clamp and the second guide rail.

[0020] In one embodiment, the second guide rail is configured as a shell having an elongated hole, a fixing plate is provided on the counterweight assembly and / or the fixing fixture, and the locking member includes:

[0021] a nut, the nut being disposed in the inner cavity of the shell;

[0022] a handle, the handle being arranged on the outside of the housing;

[0023] A screw rod, one end of which is fixedly connected to the handle, and the other end of which is threadedly connected to the nut after passing through the fixing plate and the long strip hole in sequence.

[0024] In one embodiment, a plurality of the guide mechanisms are provided, and the plurality of guide mechanisms are provided on both sides of the counterweight assembly, with at least two guide mechanisms provided on each side.

[0025] In one embodiment, the vibration testing device also includes a lifting mechanism, which includes a driving member and a connecting belt, one end of the connecting belt is wrapped around the driving member, and the other end is detachably connected to the counterweight assembly, the driving member is arranged on the frame, and the driving member is used to drive the counterweight assembly to move along the first direction through the connecting belt.

[0026] In a second aspect, the present invention provides a vehicle testing system, comprising a shock absorber and a vibration testing device according to any of the above schemes, wherein the test piece is configured as the shock absorber, one end of the shock absorber is connected to the counterweight assembly, and the other end of the shock absorber is connected to the actuating assembly.

[0027] The beneficial effects of the present invention are:

[0028] The present invention provides a vibration test device and a vehicle test system. The vibration test device includes a frame, a counterweight assembly, and an actuator assembly. A shock absorber waiting to be tested can be connected between the counterweight assembly and the actuator assembly. The counterweight assembly can simulate the weight borne by the test piece. The actuator assembly can generate vibration by reciprocating along a first direction. Based on the road spectrum, the vibration force of the shock absorber waiting to be tested under actual working conditions is simulated. The test piece vibrates with the actuator assembly and drives the counterweight assembly to move, simulating the working state of the test piece under actual working conditions. The shock absorber waiting to be tested can be independently tested, avoiding the use of springs, brackets and other components in the suspension system and components such as the cab or frame for accompanying testing, thereby reducing the difficulty of test installation. This embodiment can independently and specifically test the shock absorber waiting to be tested. By applying vibration, the performance indicators of the test piece, such as damping, stroke parameters, and durability, can be accurately tested, thereby improving the reliability and accuracy of the performance test of the test piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front view of the vibration test device in an embodiment of the present invention.

[0030] Figure 2 This is an axonometric diagram of a vibration test device in an embodiment of the present invention.

[0031] Figure 3 Schematic diagram of the positional relationship among the counterweight assembly, the actuating assembly, and the guide mechanism in an embodiment of the present invention.

[0032] Figure 4 Schematic diagram of the connection structure of the counterweight assembly and the guide mechanism in an embodiment of the present invention.

[0033] Figure 5Schematic diagram of the positions of the first sling and the second sling in an embodiment of the present invention.

[0034] Figure 6 Schematic diagram of the connection structure between the actuating assembly and the guide mechanism in an embodiment of the present invention.

[0035] In the picture:

[0036] 1. Frame;

[0037] 2. Counterweight assembly; 21. Counterweight mechanism; 211. Pallet; 212. Mass block; 213. Connecting plate; 214. Fastener; 22. First spreader;

[0038] 3. Actuating assembly; 31. Actuator; 32. Second sling; 33. Fixing fixture;

[0039] 4. Items to be tested;

[0040] 5. Guide mechanism; 51. First guide rail; 52. Slider; 53. Second guide rail; 54. Locking member; 541. Screw; 542. Nut; 543. Handle; 55. Fixing plate; 56. Limit block;

[0041] 6. Lifting mechanism; 61. Driving member; 62. Connecting belt; 63. Hook; 64. Lifting lug. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0043] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0044] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0046] like Figures 1 to 2 As shown in the figure, the Z direction is the first direction, the X direction is the second direction, and the Y direction is the third direction. This embodiment provides a vibration test device, which includes a frame 1, a counterweight assembly 2, and an actuator assembly 3. The counterweight assembly 2 is slidably connected to the frame 1 along the first direction and is used to connect to one end of the test piece 4. The actuator assembly 3 is disposed on the frame 1 and is capable of reciprocating in the first direction. The actuator assembly 3 is used to connect to the other end of the test piece 4 and drive the test piece 4 to reciprocate in the first direction.

[0047] With this arrangement, the shock absorber test piece 4 can be connected between the counterweight assembly 2 and the actuator assembly 3. The counterweight assembly 2 can simulate the weight borne by the test piece 4. The reciprocating movement of the actuator assembly 3 in the first direction can generate vibration. Based on the road spectrum, the vibration force of the shock absorber test piece 4 under actual operating conditions is simulated. The test piece 4 vibrates with the actuator assembly 3 and drives the counterweight assembly 2 to move, simulating the working state of the test piece 4 under actual operating conditions. This allows for independent testing of the shock absorber test piece 4, avoiding the need for supporting testing with components such as springs and brackets in the suspension system, as well as components such as the cab or frame, and reduces the difficulty of test installation.

[0048] This embodiment can perform independent and targeted testing on the shock absorber waiting to be tested 4, and accurately test the performance indicators of the test piece 4 such as damping, stroke parameters, and durability by applying vibration, thereby improving the reliability and accuracy of the performance test of the test piece 4. It solves the problem in related technologies that vibration tests need to be accompanied by springs, brackets and other components in the suspension system, as well as components such as the cab or frame, which have complex structures, are difficult to install, and are difficult to inspect and verify the performance parameters of the shock absorber itself.

[0049] like Figures 1 to 2 As shown, in some embodiments, the counterweight assembly 2 includes a counterweight mechanism 21 and a first sling 22. The counterweight mechanism 21 is slidably connected to the frame 1, that is, the counterweight mechanism 21 slides along a first direction and is connected to the frame 1, supported by the frame 1. The first sling 22 is disposed on the counterweight mechanism 21 and is configured to be rotatably connected to the test piece 4. The rotation axis of the first sling 22 and the test piece 4 is along a second direction, which intersects the first direction. That is, the first sling 22 can movably support the test piece 4, thereby avoiding stress concentration in the fixed connection between the test piece 4 and the counterweight assembly 2, which could cause damage.

[0050] like Figures 3 and 4 As shown, in some embodiments, the counterweight mechanism 21 includes a tray 211 and a plurality of mass blocks 212. The tray 211 is slidably connected to the frame 1, that is, the tray 211 slides along a first direction and is connected to the frame 1. The tray 211 can be, but is not limited to, a flat plate or a frame structure. The mass blocks 212 are arranged on the tray 211. The sum of the masses of the mass blocks 212 can be equal to the weight assigned to the test piece 4 in actual working conditions. For example, when the test piece 4 is configured as a shock absorber in the cab suspension system, the sum of the masses of the mass blocks 212 can be calculated based on the cab weight, the center of mass position of the cab, and the arrangement distance of the shock absorbers to simulate a quarter of the cab weight.

[0051] Specifically, the cab weight allocated to each shock absorber is calculated by multiplying the cab weight by the ratio of the lateral distance between the shock absorber and the center of mass, and then by the ratio of the longitudinal distance between the shock absorber and the center of mass. For example, the cab weight can generally be distributed to four shock absorbers, which are arranged in a square and can be represented as the first, second, third, and fourth shock absorbers arranged adjacent to each other along the square. The first shock absorber can be configured as test piece 4. The ratio of the distance between the first shock absorber and the center of mass along the second direction to the distance between the first and second shock absorbers along the second direction is the ratio of the lateral distance between the shock absorber and the center of mass. The ratio of the distance between the first shock absorber and the center of mass along the third direction to the distance between the first and fourth shock absorbers along the third direction is the ratio of the longitudinal distance between the shock absorber and the center of mass.

[0052] The multiple masses 212 are stacked along a first direction so that they align with the vibration direction of the actuator assembly 3, reducing mass deviation. The multiple masses 212 are detachably connected, using, but not limited to, bolted, magnetic, clamped, or adhesive connections. This allows the number of masses 212 to be increased or decreased based on test requirements, thereby adjusting the gravity applied to the test piece 4.

[0053] In this embodiment, the mass block 212 and the tray 211 can be detachably connected. When multiple mass blocks 212 are provided, only the mass block 212 located farthest downstream can be connected to the tray 211. The mass block 212 can be designed as a plate-like structure. A connecting plate 213 and multiple fasteners 214 can be provided on the side of the mass block 212. Each mass block 212 can be provided with a connecting hole on the side. The fastener 214 passes through the connecting plate 213 and is connected to the mass block 212 to fix the multiple mass blocks 212 to the connecting plate 213, thereby achieving fixation between the multiple mass blocks 212. The connecting plates 213 and fasteners 214 can be provided in groups, and multiple groups can be provided on both sides of the mass block 212 to fix the two sides of the mass block 212 respectively, so as to ensure a stable connection between the mass blocks 212. The fasteners 214 can be, but are not limited to, bolts, studs, or pins.

[0054] like Figure 3 and Figure 5 As shown, in some embodiments, the actuation assembly 3 includes an actuator 31 and a second sling 32. The actuator 31 is connected to the frame 1. Optionally, the bottom of the actuator 31 can be fixedly connected to the frame 1. The actuator 31, also known as an exciter, is a key component for implementing active vibration control. It can apply a control force to the test piece 4 according to a preset control law. That is, the actuator 31 can simulate the displacement-time spectrum curve of the force applied to the test piece 4 based on the displacement pulse, reproduce the excitation of the test piece 4 by the external device, and use the second sling 32 to restrict the degrees of freedom of the actuator 31 in the second and third directions, while releasing the degrees of freedom in the first direction alone.

[0055] The second sling 32 is used to be connected to the test piece 4 for rotation. The rotation axis of the second sling 32 and the test piece 4 is along the third direction. The third direction, the second direction and the first direction intersect with each other. That is, the second sling 32 can movably support the test piece 4 to avoid stress concentration in the fixed connection between the test piece 4 and the counterweight assembly 2, which may cause damage. Moreover, the rotation axis of the test piece 4 and the first sling 22 is in a different direction from the rotation axis of the test piece 4 and the second sling 32. This can reduce the rotation of the test piece 4 in the first direction, so that the test piece 4 remains in a vibrating state.

[0056] It should be noted that fixed connections may be used between the counterweight mechanism 21 and the test piece 4 , and between the actuating assembly 3 and the test piece 4 , to meet test requirements.

[0057] like Figure 3 and Figure 5 As shown, in some embodiments, the actuator assembly 3 further includes a plurality of fixing fixtures 33, which are used to circumferentially limit the actuator 31. The fixing fixtures 33 are slidably connected to the actuator 31, and the fixing fixtures 33 are arranged along the circumference of the actuator 31. The fixing fixtures 33 are slidably connected to the frame 1. The fixing fixtures 33 can circumferentially support the actuator 31 with the frame 1 as support, thereby reducing the displacement of the actuator 31 during vibration. The plurality of fixing fixtures 33 are arranged along the first direction, that is, the plurality of fixing fixtures 33 can form a plurality of support points, thereby providing multi-point support for the actuator 31. The position of the actuator 31 is more stable, displacement or shaking is reduced, and the force application accuracy of the actuator 31 on the test piece 4 is improved. It can also prevent the actuator assembly 3 from being offset when applying a load, causing the frame 1 to overturn as a whole.

[0058] In this embodiment, the fixing clamp 33 can be configured as a clamping plate, and a through hole can be provided in the middle of the clamping plate, through which the actuator 31 can slide, and the side of the clamping plate can be slidably connected to the frame 1. Alternatively, the fixing clamp 33 can include two detachably connected clamping arms, which are clamped on both sides of the actuator 31 and then connected to each other, and each clamping arm is slidably connected to the frame 1.

[0059] like Figure 4 and Figure 6 As shown, in some embodiments, the vibration testing device further includes a guide mechanism 5, which includes a first guide rail 51 and a slider 52. The first guide rail 51 is disposed on the frame 1 along a first direction and can be fixedly connected to the frame 1. The slider 52 is connected to the counterweight assembly 2 and / or the fixing fixture 33 and can slide along the first guide rail 51. The inner wall of the slider 52 can be provided with a plurality of balls, and the slider 52 and the first guide rail 51 can slide by the rolling of the balls.

[0060] With this arrangement, the counterweight assembly 2 can achieve a sliding connection with the frame 1 by sliding the slider 52 against the first guide rail 51. When the actuator 31 vibrates, causing the test piece 4 to vibrate, the counterweight assembly 2 can slide directionally with the frame 1 in the first direction, reducing the wobbling of the counterweight assembly 2 in the second or third directions and accurately simulating the working state of the test piece 4. The fixing fixture 33 can achieve a sliding connection with the frame 1 by sliding the slider 52 against the first guide rail 51. The fixing fixture 33 can slide directionally with the frame 1 in the first direction, thereby adjusting the fixed position of the actuator 31, reducing the wobbling movement of the actuator 31, and improving the force applied by the actuator 31 to the test piece 4.

[0061] like Figure 3 As shown, the guide mechanism 5 may further include a limit block 56. A plurality of limit blocks 56 may be provided, and the plurality of limit blocks 56 may be respectively disposed at different positions on the first guide rail 51 to limit the range of motion of each slider 52. For example, two limit blocks 56 may be provided, and the two limit blocks 56 may be disposed at the end positions of the guide rail to prevent the slider 52 from detaching from the guide rail.

[0062] like Figure 4 and Figure 6 As shown, in some embodiments, the guide mechanism 5 also includes a second guide rail 53 and a locking member 54. The second guide rail 53 is arranged on the frame 1 along the first direction, and the locking member 54 is arranged on the counterweight assembly 2 and / or the fixing clamp 33. The locking member 54 is detachably connected to the second guide rail 53. The locking member 54 is used to fix the counterweight assembly 2 and the second guide rail 53, or to fix the fixing clamp 33 and the second guide rail 53.

[0063] With this arrangement, the counterweight assembly 2 can switch between a fixed and sliding state relative to the frame 1 via the locking member 54 and the second guide rail 53. When the locking member 54 is installed and locked with the second guide rail 53, the counterweight assembly 2 is fixedly connected to the frame 1, and their positions are fixed. When the locking member 54 is removed and unlocked from the second guide rail 53, the locking member 54 can slide along the second guide rail 53, allowing the counterweight assembly 2 to slide relative to the frame 1, switching the installation position of the counterweight assembly 2. During non-bench testing, the locking member 54 and the second guide rail 53 cooperate to secure the counterweight assembly 2, preventing the test piece 4 and the actuator assembly 3 from being subjected to prolonged stress, which could cause non-test damage.

[0064] The fixing clamp 33 can switch between being fixed or sliding relative to the frame 1 via the locking member 54 and the second guide rail 53. When the locking member 54 is installed and locked with the second guide rail 53, the fixing clamp 33 is fixedly connected to the frame 1, and the two are fixed in position. When the locking member 54 is removed and unlocked from the second guide rail 53, the locking member 54 can slide along the second guide rail 53, and the fixing clamp 33 can slide relative to the frame 1, switching the installation position of the fixing clamp 33.

[0065] In this embodiment, the number and position of the locking members 54 and the sliders 52 can be arranged in groups in a one-to-one correspondence. A fixing plate 55 can be provided on both the counterweight assembly 2 and the fixing fixture 33. The locking members 54 and the sliders 52 in each group can be connected to the fixing plate 55. That is, the locking members 54 can lock the positions of the sliders 52 and the first guide rail 51 by locking the fixing plate 55 and the second guide rail 53. Of course, to simplify the structure, the locking members 54 can also be directly provided on the sliders 52. The locking members 54 pass through the sliders 52 and then connect to the second guide rail 53, which can also switch the locked and unlocked states of the sliders 52.

[0066] like Figure 4 and Figure 6 As shown, in some embodiments, the second guide rail 53 can be configured as a housing having an elongated hole, a fixing plate 55 is provided on the counterweight assembly 2 and / or the fixing fixture 33, and the locking member 54 includes a nut 542, a handle 543, and a screw 541. The handle 543 is provided on the outside of the housing, one end of the screw 541 is fixedly connected to the handle 543, and the other end of the screw 541 is passed through the fixing plate 55 and the elongated hole in sequence and then threadedly connected to the nut 542. The nut 542 is provided in the inner cavity of the housing, and the side wall of the housing can limit the nut 542 to prevent the nut 542 from rotating. That is, the nut 542 can only slide along the second guide rail 53 driven by the screw 541. When the screw 541 and the nut 542 are connected, the nut 542 is fixed in position, and the handle 543 drives the screw 541 to rotate to screw in or out the nut 542.

[0067] With this arrangement, rotating the handle 543 forward tightens the screw 541 and the nut 542, allowing the handle 543 and the nut 542 to be clamped on the inner and outer sides of the second guide rail 53 and clamp the fixing plate 55 and the second guide rail 53, thereby locking the counterweight assembly 2 and / or the fixing fixture 33 to the second guide rail 53. Rotating the handle 543 backward loosens the screw 541 and the nut 542, allowing the handle 543 and the nut 542 to move away from each other, creating a gap between the fixing plate 55 and the second guide rail 53, thereby allowing the screw 541 to slide along the elongated hole in the second guide rail 53, thereby unlocking the counterweight assembly 2 and / or the fixing fixture 33 from the second guide rail 53.

[0068] like Figure 4 and Figure 6 As shown, in some embodiments, a plurality of guide mechanisms 5 are provided, and the plurality of guide mechanisms 5 are provided on both sides of the counterweight assembly 2 and / or the fixing fixture 33, and at least two guide mechanisms 5 are provided on each side, that is, the guide mechanisms 5 can be provided on both sides of the counterweight assembly 2 or the fixing fixture 33 for guiding, which can make the sliding between the counterweight assembly 2 and the frame 1, and the sliding between the fixing fixture 33 and the frame 1 smoother, and reduce jamming.

[0069] In each guide mechanism 5, at least two sliders 52 can be provided along the first direction, which can increase the guiding distance of the slider 52 to the counterweight assembly 2 or the fixing fixture 33, and avoid bias when the actuating assembly 3 applies a load, causing the entire frame 1 to overturn.

[0070] like Figure 2As shown, in some embodiments, the vibration test device further includes a lifting mechanism 6, wherein the lifting mechanism 6 can be arranged above the counterweight assembly 2 and can drive the counterweight assembly 2 to move. The lifting mechanism 6 includes a driving member 61 and a connecting belt 62, one end of the connecting belt 62 is wound around the driving member 61, and the other end is detachably connected to the counterweight assembly 2. The connection can be, but is not limited to, a snap connection, a hook connection, a magnetic connection, or a bolt connection. After the position adjustment of the counterweight assembly 2 is completed, the connecting belt 62 can be removed from the counterweight assembly 2 to reduce the impact on the vibration detection of the counterweight assembly 2. The driving member 61 is arranged on the frame 1. The movement of the driving member 61 can drive the connecting belt 62 to extend or shorten, thereby driving the counterweight assembly 2 to move along the first direction through the connecting belt 62, and steplessly adjusting the position of the counterweight assembly 2 on the frame 1 to match the installation position of the test pieces 4 of different sizes.

[0071] In this embodiment, the driving member 61 can be, but is not limited to, a motor, a pneumatic cylinder, or a hydraulic cylinder. The driving member 61 can be fixedly connected to the frame 1 by bolts, and the connecting belt 62 can be, but is not limited to, a steel wire rope or a synchronous belt. A plurality of lifting mechanisms 6 can be provided, and the plurality of lifting mechanisms 6 can be separately provided on both sides of the counterweight mechanism 21 so as to simultaneously lift the counterweight mechanism 21 on both sides, so that the counterweight mechanism 21 is evenly stressed and moves more smoothly. A lifting lug 64 can be provided on the counterweight mechanism 21, and a hook 63 can be provided at the end of the connecting belt 62. When the counterweight mechanism 21 needs to be raised or lowered, the hook 63 can be hooked on the lifting lug 64, and the driving member 61 drives the connecting belt 62 to drive the counterweight mechanism 21 to be raised or lowered.

[0072] like Figures 1 to 3 As shown, the vehicle test system provided by the embodiment of the second aspect of the present invention includes a shock absorber and a vibration test device in any of the above-mentioned schemes, and the test piece 4 is configured as a shock absorber, one end of the shock absorber is connected to the counterweight assembly 2, and the other end of the shock absorber is connected to the actuator assembly 3.

[0073] This setup allows the shock absorber to be installed between the counterweight assembly 2 and the actuator assembly 3 in accordance with the actual vehicle's posture and angle, simulating the installation state under actual operating conditions. The counterweight assembly 2 simulates the weight borne by the shock absorber, and the reciprocating movement of the actuator assembly 3 in the first direction generates vibration. Based on the road spectrum, the vibration forces acting on the shock absorber under actual operating conditions are simulated to optimize the shock absorber's stiffness, damping, and stroke parameters. The shock absorber vibrates with the actuator assembly 3 and drives the counterweight assembly 2 in motion, simulating the shock absorber's operating state under actual operating conditions. This verifies whether the shock absorber has bottomed out and the vibration isolation effect of the shock absorber and its durability under extreme load conditions.

[0074] This embodiment can independently test the shock absorber, avoiding the need for accompanying testing with components such as springs and brackets in the suspension system, as well as components such as the cab or frame. The shock absorber test needs can be met without using the actual vehicle body, reducing the difficulty of test installation. The shock absorber can be independently and specifically tested, and performance indicators such as the shock absorber's damping, stroke parameters, and durability can be accurately tested by applying vibration, thereby reducing abnormal conditions such as oil leakage, air leakage, abnormal noise, and breakage during the use of the shock absorber.

[0075] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A vibration test device, characterized in that: include: Frame (1); A counterweight assembly (2), the counterweight assembly (2) being slidably connected to the frame (1) along a first direction, the counterweight assembly (2) being used to be connected to one end of a test piece (4); an actuating assembly (3), the actuating assembly (3) being arranged on the frame (1), the actuating assembly (3) being used to connect with the other end of the test piece (4) and drive the test piece (4) to move back and forth along the first direction, the test piece (4) being configured as a shock absorber; The counterweight assembly (2) comprises: A counterweight mechanism (21), the counterweight mechanism (21) being slidably connected to the frame (1); a first sling (22), the first sling (22) being arranged on the counterweight mechanism (21), the first sling (22) being used for being rotatably connected to the test piece (4), the rotation axis of the first sling (22) and the test piece (4) being along a second direction, the second direction intersecting the first direction; The actuating assembly (3) comprises: An actuator (31), the actuator (31) being connected to the frame (1); A second sling (32) is used for being rotatably connected to the test piece (4), wherein the rotation axis of the second sling (32) and the test piece (4) is along a third direction, and the third direction, the second direction and the first direction intersect each other.

2. The vibration test device according to claim 1, characterized in that: The actuating assembly (3) further includes a plurality of fixing clamps (33), the fixing clamps (33) being used to circumferentially limit the actuator (31); the fixing clamps (33) being slidably connected to the actuator (31), and the fixing clamps (33) being arranged circumferentially along the actuator (31); the fixing clamps (33) being slidably connected to the frame (1), and the plurality of fixing clamps (33) being arranged along the first direction.

3. The vibration test device according to claim 2, characterized in that: The vibration test device further comprises a guide mechanism (5), wherein the guide mechanism (5) comprises a first guide rail (51) and a slider (52), wherein the first guide rail (51) is arranged on the frame (1) along the first direction, and the slider (52) is arranged on the counterweight assembly (2) and / or the fixing fixture (33), and the slider (52) is capable of sliding along the first guide rail (51).

4. The vibration test device according to claim 3, characterized in that: The guide mechanism (5) further comprises a second guide rail (53) and a locking member (54), wherein the second guide rail (53) is arranged on the frame (1) along the first direction, and the locking member (54) is arranged on the counterweight assembly (2) and / or the fixing fixture (33), and the locking member (54) is detachably connected to the second guide rail (53), and the locking member (54) is used to fix the counterweight assembly (2) and the second guide rail (53) or to fix the fixing fixture (33) and the second guide rail (53).

5. The vibration test device according to claim 4, characterized in that: The second guide rail (53) is configured as a shell having an elongated hole, a fixing plate (55) is provided on the counterweight assembly (2) and / or the fixing fixture (33), and the locking member (54) includes: a nut (542), the nut (542) being disposed in the inner cavity of the housing; a handle (543), the handle (543) being arranged outside the housing; A screw rod (541), one end of the screw rod (541) is fixedly connected to the handle (543), and the other end of the screw rod (541) is threadedly connected to the nut (542) after passing through the fixing plate (55) and the long strip hole in sequence.

6. The vibration test device according to claim 3, characterized in that: A plurality of the guide mechanisms (5) are provided, and the plurality of guide mechanisms (5) are provided on both sides of the counterweight assembly (2), with at least two guide mechanisms (5) provided on each side.

7. The vibration test device according to claim 1, characterized in that: The vibration test device further includes a lifting mechanism (6), the lifting mechanism (6) including a driving member (61) and a connecting belt (62), one end of the connecting belt (62) is wound around the driving member (61), and the other end is detachably connected to the counterweight assembly (2), the driving member (61) is arranged on the frame (1), and the driving member (61) is used to drive the counterweight assembly (2) to move along the first direction through the connecting belt (62).

8. A vehicle testing system, characterized in that: The vibration test device comprises a vibration absorber and any one of claims 1 to 7, wherein one end of the vibration absorber is connected to the counterweight assembly (2), and the other end of the vibration absorber is connected to the actuating assembly (3).

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