Loading device for suspension experiment device

Abstract

The utility model relates to the technical field of suspension testing, in particular to a loading device for a suspension experimental device, which comprises a rack, an actuator is arranged on the rack, the top end of a piston rod of the actuator is connected with a displacement sensor, and the bottom end of the piston rod of the actuator is provided with a load sensor. The load sensor is connected with the loading device through a driving connecting piece, the loading device is connected with the clamp, the servo valve group is connected with the actuator, an energy accumulator is arranged on the servo valve group, and the energy accumulator stabilizes the oil supply pressure of the servo valve group by absorbing hydraulic impact and providing instantaneous flow. The utility model provides a loading device for a suspension experimental device, which can monitor and feed back displacement and stress information of a piston rod in real time, thereby accurately simulating load conditions of a suspension under excitation of different road conditions, and effectively restoring stress states and dynamic load characteristics of the suspension in actual working conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of suspension test, especially relates to a loading device for suspension experimental device. BACKGROUND

[0002] In the research and development and performance verification process of the vehicle suspension system, experimental test is the key link for evaluating the dynamic response, damping performance and durability. The traditional suspension experimental device usually uses mechanical or hydraulic actuators for loading to simulate the dynamic load of the uneven road surface on the suspension in the actual driving. However, the loading device in the prior art generally has problems such as low loading precision, dynamic response lag, insufficient force and displacement collaborative control capability, and it is difficult to truly restore the complex and changeable road conditions. Some devices lack real-time and accurate monitoring of the output force and displacement of the actuator, which limits the closed-loop control performance; therefore, a high-precision loading device is urgently needed to realize accurate simulation and real-time monitoring of the stress state and dynamic load characteristics of the suspension system, and meet the needs of high-performance suspension test. SUMMARY

[0003] In view of the above-mentioned deficiencies of the existing loading device, the utility model provides a loading device for suspension experimental device, which can monitor and feedback the displacement and stress information of the piston rod in real time, thereby accurately simulating the load conditions of the suspension under different road conditions, and effectively restoring the stress state and dynamic load characteristics of the suspension in the actual working condition.

[0004] To achieve the above-mentioned purpose, the embodiments of the utility model adopt the following technical scheme:

[0005] A loading device for suspension experimental device, comprising a rack, an actuator is arranged on the rack, a displacement sensor is connected to the top end of the piston rod of the actuator, a load sensor is arranged at the bottom end of the piston rod of the actuator, the load sensor is connected with the loading device through a driving connecting piece, the loading device is connected with a clamp, further comprising a servo valve group, the servo valve group is connected with the actuator, an accumulator is arranged on the servo valve group, the accumulator stabilizes the oil supply pressure of the servo valve group by absorbing hydraulic impact and providing instantaneous flow.

[0006] According to one aspect of the utility model, the limiting device comprises an anti-rotation plate fixedly connected with the load sensor, a guide rod is arranged on the anti-rotation plate, and the guide rod is fixedly connected with the rack.

[0007] According to one aspect of the utility model, the guide rod is provided with two guide rods arranged at both ends of the anti-rotation plate.

[0008] According to one aspect of the utility model, the loading device includes loading plate and locating plate, the loading plate with driving connector connects, the locating plate sets up on the loading plate with clamp connection.

[0009] According to one aspect of the utility model, the driving connector includes connecting head and connecting rod, the connecting head with load sensor fixed connection, the connecting head passes through connecting rod and loading plate connection.

[0010] According to one aspect of the utility model, the connecting head includes hinge support and upper chuck mounting plate, the hinge support passes through upper chuck mounting plate and installs on the load sensor.

[0011] According to one aspect of the utility model, the connecting rod includes connecting rod, the both ends of connecting rod connect about joint bearing, and the joint bearing of both ends is connected with hinge support and loading plate respectively.

[0012] According to one aspect of the utility model, the output end of actuator is fixedly connected with lengthening rod, and the load sensor is fixedly connected with the other end of the lengthening rod.

[0013] According to one aspect of the utility model, the servo valve group includes servo valve block and servo valve, the servo valve is arranged on the servo valve block, and the servo valve block is connected with the actuator through an oil pipe.

[0014] The utility model discloses the advantages that load sensor and displacement sensor cooperate and work, can collect the displacement-force dynamic response data of suspension system comprehensively, realizes closed loop monitoring and accurate control to actuator output performance. Accumulator and servo valve cooperate and work, not only guarantee the loading performance of actuator high dynamic, high accuracy, also enhance the rigidity and reliability of hydraulic system, provide stable, controllable hydraulic power support for suspension experiment. The loading device for suspension experiment device provided by the utility model can monitor and feedback the displacement and stress information of piston rod in real time, realize dynamic closed loop monitoring to suspension system displacement-force response, accurately simulate the load condition under different road conditions excitation, effectively restore the stress state and dynamic load characteristics of suspension in actual working condition, improve the accuracy and reliability of experiment. ACCURACY

[0015] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be briefly introduced to the drawing needed to be used in the embodiment, obviously, the drawing in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0016] Figure 1A three-dimensional schematic view of a loading device for a suspension experiment device.

[0017] Figure 2 A three-dimensional structural schematic view of a suspension experiment device provided with the loading device.

[0018] The names corresponding to the serial numbers in the figure are as follows:

[0019] 1, rack; 11, stand; 12, crossbeam; 13, upper mounting plate; 14, guardrail; 15, base; 2, actuator; 3, displacement sensor; 4, load sensor; 5, lengthening rod; 6, driving connecting piece; 61, connecting head; 611, hinge support; 612, upper chuck mounting plate; 62, connecting rod; 621, connecting rod; 622, joint bearing; 10, locking pad; 8, limiting device; 81, anti-rotation plate; 82, guide rod; 9, loading device; 91, loading plate; 92, pin shaft; 93, positioning plate; 7, servo valve group; 71, servo valve block; 72, servo valve; 73, oil pipe; 74, accumulator; 100, clamp; 200, loading beam; 300, counterforce frame. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0022] It is to be noted that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In addition, it is to be understood that when a layer is referred to as being "connected", "coupled", or "adjacent" to another element, it can be directly connected, coupled, or adjacent to the other element, or intervening elements can also be present. As used herein, the term "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms are used for explanation only and not to limit the embodiments.

[0023] Embodiment One

[0024] As shown in Figure 1 and Figure 2 , a loading device for a suspension test device, the suspension test device is used for durability test of automobile suspension and the like, the loading device is used for vertical loading of the suspension. The suspension test device frame 1, the loading device, the counterforce frame 300 and the clamp 100 are fixedly installed on the counterforce frame 300. The frame 1 is used for installing various parts on the machine body, and the frame includes a base 15, two vertical columns 11 fixed at both ends of the base 15, a cross beam 12 fixed between or at the top of the two vertical columns 11, an upper mounting plate 13, and a guardrail 14 fixedly installed on the cross beam 12, and the top of the guardrail 14 is provided with the upper mounting plate 13. The counterforce frame 300 is installed on the base 15 of the frame 1 and is arranged between the two vertical columns 11. An actuator 2 is arranged on the frame 1, the top end of the actuator 2 is connected with a displacement sensor 3, the output end of the actuator 2 is provided with a load sensor 4, the load sensor 4 is connected with the loading device 9 through a driving connecting piece 6, and the loading device 9 is connected with the clamp 100. Specifically, the top end of the displacement sensor 3 is fixedly connected with the upper mounting plate 13 of the frame 1, the top end of the piston rod of the actuator 2 is connected with the displacement sensor 3, and the bottom end of the piston rod is connected with the load sensor 4.

[0025] In the embodiment, the top end of the piston rod of the actuator 2 is fixedly connected with a loading beam 200, the loading beam 200 is sleeved on the vertical column and can slide up and down along the vertical column.

[0026] In the embodiment, the loading device 9 includes a loading plate 91 and a positioning plate 93, the loading plate 91 is connected with the driving connecting piece 6, and the positioning plate 93 is arranged on the loading plate 91 and is connected with the clamp 100.

[0027] In the embodiment, the driving connecting piece 6 includes a connecting head 61 and a connecting rod 62, the connecting head 61 is fixedly connected with the load sensor 4, and the connecting head 61 is connected with the loading plate 91 through the connecting rod 62.

[0028] In the embodiment, the connecting head 61 comprises a hinge support 611 and an upper clamp mounting plate 612, and the hinge support 611 is mounted on the load sensor 4 through the upper clamp mounting plate 612.

[0029] In the embodiment, the connecting rod 62 comprises a connecting rod 621, and the two ends of the connecting rod 621 are connected with joint bearings 622, wherein one end of the joint bearings 622 is connected with a pin shaft on the hinge support 611, and the other end of the joint bearings 622 is connected with a pin shaft 92 on the loading plate 91.

[0030] In the embodiment, the output end of the actuator 2 is fixedly connected with an extension rod 5, and the load sensor 4 is fixedly connected with the other end of the extension rod 5. Specifically, the bottom end of the piston rod of the actuator is fixedly connected with the extension rod 5 through a locking pad 10, and the other end of the extension rod 5 is also fixedly connected with the load sensor 4 through the locking pad 10.

[0031] In the embodiment, a limiting device 8 is further included, which comprises an anti-rotation plate 81 fixedly connected with the load sensor 4, and a guide rod 82 provided on the anti-rotation plate 81 and fixedly connected with the cross beam 12 of the rack 1.

[0032] In the embodiment, two guide rods 82 are provided, which are symmetrically arranged at the two ends of the anti-rotation plate 81.

[0033] The beneficial effects of the embodiment are that: a displacement sensor is arranged at the top end of the piston rod of the actuator 2, and a load sensor 4 is arranged at the bottom end of the piston rod, the displacement sensor is used to measure the displacement change of the piston rod in real time and accurately, so as to obtain the dynamic stroke, vibration amplitude and motion trajectory of the suspension system, and to provide key data for analyzing the kinematic characteristics of the suspension, evaluating the response accuracy of the control algorithm and verifying the simulation model; the load sensor is used to monitor the acting force or the counterforce borne by the actuator output in real time, and to reflect the stress state and dynamic load characteristics of the suspension under different road excitation. The displacement sensor and the load sensor work cooperatively, can comprehensively collect the "displacement-force" dynamic response data of the suspension system, and realize the closed-loop monitoring and accurate control of the output performance of the actuator. Through the arrangement of the limiting device 8, the radial deviation and rotation of the piston rod in the movement process can be limited, the movement guiding accuracy is improved, the stability of the stress direction of the load sensor is ensured, and the measurement error and device damage caused by torsion or lateral force are avoided.

[0034] Embodiment two

[0035] The difference between the embodiment and the embodiment one is that the servo valve group 7 is further included in the embodiment, the servo valve group 7 is connected with the actuator 2, the servo valve group 7 includes a servo valve block 71 and a servo valve 72, the servo valve 72 is arranged on the servo valve block 71, and the servo valve block 71 is connected with the actuator 2 through an oil pipe 73. The servo valve 72 can accurately adjust the flow and flow direction of the hydraulic oil, so that the actuator 2 can accurately simulate complex road conditions, and fatigue durability, performance verification and other high requirement tests can be realized.

[0036] In the embodiment, the servo valve group 7 is provided with an accumulator 74, the accumulator 74 stabilizes the oil supply pressure of the servo valve group 7 by absorbing hydraulic impact and providing instantaneous flow. The servo valve group 7 is connected with the hydraulic station through a high-pressure oil pipe, the hydraulic station outputs high-pressure oil, which is delivered to the oil inlet of the servo valve group 7 through the high-pressure oil pipe; the servo valve group adjusts the flow and direction of the oil according to the control signal, and then delivers the oil to the two cavities of the actuator through the high-pressure oil pipe; the actuator returns oil: the high-pressure oil is returned to the high-pressure oil pipe through the servo valve group and finally returned to the oil tank of the hydraulic station.

[0037] The suspension test device further includes a control system, and the actuator 2, the displacement sensor 3, the load sensor 4 and the servo valve group 7 are connected with the control system.

[0038] The working principle or operation process in the embodiment is as follows: first, the hydraulic system adjusts the flow and direction of the pressure oil through the servo valve group, accurately controls the extension and retraction movement of the actuator piston rod, and realizes dynamic loading on the suspension test piece; the servo valve block is connected with the accumulator, the accumulator plays a role of stabilizing oil pressure, absorbing pressure fluctuation and hydraulic impact in the system operation, and timely supplements oil in the case of instantaneous high flow demand, so as to ensure the rapidity and stability of the loading response; the displacement sensor at the top end of the actuator piston rod monitors the piston stroke in real time, and the load sensor at the bottom end synchronously collects the output force signal, so as to realize closed-loop feedback control of displacement and force; at the same time, the limiting device arranged at the bottom end of the piston rod is composed of two symmetrically arranged guide rods and an anti-rotation plate, which effectively restricts the radial deviation and torsion of the piston rod, and guarantees the coaxiality of force transmission and the measurement accuracy; the whole loading process is dynamically adjusted under the instruction of the control system in combination with the sensor feedback signal, so as to accurately simulate various actual road load spectra, and complete high-precision test on the mechanical properties, durability and dynamic response characteristics of the suspension system.

[0039] The servo valve group 7 is used for precisely controlling the hydraulic oil flow and pressure into or out of the actuator, so as to realize the precise adjustment of the piston rod movement speed, direction and output force, thereby simulating complex dynamic load or realizing closed-loop force / displacement control; the accumulator connected with the servo valve block plays the role of stabilizing system pressure, absorbing hydraulic impact, compensating leakage and supplementing oil supply when instantaneous large flow demand, effectively reducing pressure fluctuation, improving system response speed and control stability. The servo valve and the accumulator work cooperatively, not only guaranteeing the high dynamic and high precision loading performance of the actuator, but also enhancing the rigidity and reliability of the hydraulic system, providing smooth and controllable hydraulic power support for the suspension experiment.

[0040] The above merely describes the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A loading device for a suspension test device, comprising a frame (1) on which an actuator (2) is arranged, characterized in that, The piston rod top end of the actuator (2) is connected with a displacement sensor (3), the piston rod bottom end of the actuator (2) is provided with a load sensor (4), the load sensor (4) is connected with a loading device (9) through a driving connecting piece (6), the loading device (9) is connected with a clamp (100), further comprising a servo valve group (7), the servo valve group (7) is connected with the actuator (2), the servo valve group (7) is provided with an accumulator (74), the accumulator (74) stabilizes the oil supply pressure of the servo valve group (7) by absorbing hydraulic impact and providing instantaneous flow.

2. The loading device for a suspension experiment device according to claim 1, wherein Further comprising a limiting device (8), the limiting device (8) comprises an anti-rotation plate (81) fixedly connected with the load sensor (4), the anti-rotation plate (81) is provided with a guide rod (82), and the guide rod (82) is fixedly connected with the rack (1).

3. The loading device for a suspension test device according to claim 2, wherein The guide rod (82) is provided with two guide rods (82) arranged at two ends of the anti-rotation plate (81).

4. The loading device for a suspension experiment device according to claim 1, wherein The loading device (9) comprises a loading plate (91) and a positioning plate (93), the loading plate (91) is connected with the driving connecting piece (6), and the positioning plate (93) is arranged on the loading plate (91) and connected with the clamp (100).

5. The loading device for a suspension test device according to claim 4, wherein The driving connecting piece (6) comprises a connecting head (61) and a connecting rod (62), the connecting head (61) is fixedly connected with the load sensor (4), and the connecting head (61) is connected with the loading plate (91) through the connecting rod (62).

6. The loading device for a suspension test device according to claim 5, wherein The connecting head (61) comprises a hinge support (611) and an upper chuck mounting plate (612), and the hinge support (611) is mounted on the load sensor (4) through the upper chuck mounting plate (612).

7. The loading device for a suspension test device according to claim 6, wherein The connecting rod (62) comprises a connecting rod (621), and the two ends of the connecting rod (621) are connected with joint bearings (622), and the joint bearings (622) at the two ends are connected with the hinge support (611) and the loading plate (91) respectively.

8. The loading device for a suspension test device according to claim 1, wherein The output end of the actuator (2) is fixedly connected with an extension rod (5), and the other end of the extension rod (5) is fixedly connected with the load sensor (4).

9. The loading device for a suspension experiment device according to claim 1, wherein The servo valve group (7) comprises a servo valve block (71) and a servo valve (72), the servo valve block (71) is provided with the servo valve (72), and the servo valve block (71) is connected with the actuator (2) through an oil pipe (73).

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