Hydraulic damper dynamic and static performance integrated composite test bench

Abstract

The present application discloses an integrated composite test bench for dynamic and static performance of hydraulic dampers, which belongs to the field of damper testing technology, and mainly includes a base, a first support frame is fixedly installed on one side of the base, a second support frame is fixedly installed on the other side of the base, and at least two groups of fixed beams are fixedly installed on the first support frame; a hydraulic cylinder, the hydraulic cylinder is fixedly installed on the first support frame, and a first fixed end is fixedly installed on the output end of the hydraulic cylinder; a moving beam, the moving beam is slidably installed on the fixed beam, and a second fixed end is fixedly installed on the moving beam. The integrated composite test bench for dynamic and static performance of hydraulic dampers of the present application can form another group of detection stations on the other side of the moving beam by providing a second support frame, a first mounting plate, a second mounting plate and a moving beam, and two groups of different dampers can be tested simultaneously on both sides of the moving beam, thereby improving the efficiency of damper testing.

Description

Technical Field

[0001] The present application relates to the technical field of damper testing, and in particular to an integrated composite test bench for dynamic and static performances of hydraulic dampers. Background Art

[0002] A hydraulic damper is a hydraulic feed speed control device that can freely adjust the cylinder feed speed from low speed to high speed within the desired range. This device is mainly used to provide resistance to movement to dissipate movement energy and achieve a shock-absorbing effect. In order to ensure the quality and reliability of the hydraulic damper, the hydraulic damper needs to be performance tested after production. However, the performance test of the hydraulic damper is often achieved by applying a load force to the damper, thereby measuring the displacement and force of the hydraulic damper, and calculating data such as the damping coefficient. In the process of applying a load force to the damper, the load force exerted on the damper and its relationship with the displacement distance reflect the static performance of the hydraulic damper, and the displacement change process of the damper when subjected to the load force is usually displayed through a waveform diagram, which reflects the dynamic performance of the hydraulic damper.

[0003] The existing integrated dynamic and static performance composite test bench for hydraulic dampers usually consists of a base, a mounting beam, a control panel and a server. The staff fixes the hydraulic damper on the mounting beam, and then starts the servo to apply pressure to the hydraulic damper. The damper moves under the action of the servo, thereby performing a performance test on the damper to simulate its application scenario at work.

[0004] Although the above-mentioned device realizes the performance test of the hydraulic damper, since the hydraulic damper is used in a wide range of scenarios, in order to meet its wider range of uses, the production quantity of the hydraulic damper is often mass-produced. Faced with the hydraulic dampers produced in large quantities, if they are only tested one by one through a damper performance testing device at a single workstation, it will undoubtedly take a lot of time to perform the damper performance test, and the efficiency of the damper test is low. Therefore, it is necessary to provide an integrated composite test bench for the dynamic and static performance of hydraulic dampers to solve the above problems.

[0005] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0006] Based on the above problems existing in the prior art, the problem to be solved by the present application is: to provide an integrated composite test bench for dynamic and static performance of hydraulic dampers, which solves the problem of single test station and low test efficiency of damper performance testing equipment.

[0007] The technical solution adopted by the present application to solve its technical problems is: a hydraulic damper dynamic and static performance integrated composite test bench, including a base, a first support frame is fixedly installed on one side of the base, a second support frame is fixedly installed on the other side of the base, and at least two groups of fixed beams are fixedly installed on the first support frame; a hydraulic cylinder, the hydraulic cylinder is fixedly installed on the first support frame, and a first fixed end is fixedly installed on the output end of the hydraulic cylinder; a moving beam, the moving beam is slidably installed on the fixed beam, and a second fixed end is fixedly installed on the moving beam; a damper specimen, the damper specimen includes a first fixed end connected to the first fixed end The damper specimen also includes a hydraulic part connected to the second fixed end, and the piston part is slidably connected to the hydraulic part; a first slide rail, which is fixedly installed on the base, and a first slider is slidably installed on the first slide rail, and the first slider is fixedly installed on the bottom of the moving beam; a first mounting plate, which is fixedly installed on the other side of the moving beam; a slide rod, which is slidably installed on the second supporting frame, a second mounting plate is fixedly installed on one side of the slide rod, and an oil cylinder is fixedly installed on one side of the second supporting frame, and an output end of the oil cylinder is fixedly connected to the second mounting plate.

[0008] Furthermore, a guide device is fixedly installed on the base, and the guide device includes a second slide rail fixedly installed on the base, a second slider is slidably installed on the second slide rail, a support plate is fixedly installed on the second slider, a bottom plate is fixedly installed on the top of the support plate, a lifting cylinder is fixedly installed on the bottom plate, and a guide clamp is fixedly installed on the top of the lifting cylinder.

[0009] Furthermore, the guide clamp includes a head connecting piece fixedly installed on the output end of the lifting cylinder, and hinged rods are hingedly installed on both sides of the head connecting piece. A clamp is fixedly installed on the other end of the hinged rod, and the height of the clamp is greater than the diameter of the piston part. A slot hole is opened on the head connecting piece, and a return spring is fixedly installed on the bottom of the slot hole. A control rod is fixedly installed on the return spring, and the control rod is fixedly connected to the hinged rod.

[0010] Furthermore, the second slide rail and the first slide rail are in the same direction and are arranged horizontally.

[0011] Furthermore, a connecting rod is fixedly mounted on the base plate, and the other end of the connecting rod is fixedly connected to the output end of the hydraulic cylinder.

[0012] Furthermore, the first slide rail is composed of a first section, a second section and a third section connected end to end, the horizontal height of the third section is lower than the horizontal height of the first section, the third section is farther from the piston part, and the first section is closer to the piston part.

[0013] Furthermore, the second section is inclined downward in a direction away from the first section.

[0014] Furthermore, a PLC control system is arranged in the base, at least two groups of through holes are opened on the first slide rail, a through hole is opened on the first slider, and a limit rod is also installed at the bottom of the moving beam. The limit rod is located in the through hole, the limit rod and the bottom of the moving beam are made of magnetic material, and the limit rod is connected to the PLC control system signal.

[0015] The beneficial effect of the present application is that the integrated composite test bench for dynamic and static performance of hydraulic dampers provided by the present application can form another group of inspection stations on the other side of the moving beam by providing a second support frame, a first mounting plate, a second mounting plate and a moving beam. Two groups of different dampers can be inspected simultaneously on both sides of the moving beam, thereby improving the efficiency of damper inspection.

[0016] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 This is an overall schematic diagram of the integrated composite test bench for dynamic and static performance of hydraulic damper in this application;

[0019] Figure 2 for Figure 1 Side view of the overall structure;

[0020] Figure 3 for Figure 2 A schematic diagram of a partial cross-section of the overall structure;

[0021] Figure 4 for Figure 3 A magnified view of the structure of the middle A area;

[0022] Figure 5 for Figure 4 Schematic diagram of the overall structure of the lifting cylinder and guide clamp;

[0023] Figure 6 for Figure 3 Side view of the overall structure diagram;

[0024] Figure 7 for Figure 6A magnified view of the structure of region B.

[0025] Among them, the reference numerals in the figure are:

[0026] 1. base; 2. first support frame; 21. first fixed end; 22. hydraulic cylinder;

[0027] 3. Guide device; 31. Second slide rail; 311. First section; 312. Second section; 313. Third section; 32. Second slide block; 33. Support plate; 34. Bottom plate; 35. Lifting cylinder; 36. Connecting rod;

[0028] 4. Fixed beam; 5. Moving beam; 51. Second fixed end; 52. First slider; 53. First slide rail; 54. First mounting plate; 6. Guide clamp; 61. Head connector; 62. Articulated rod; 63. Clamp; 64. Control rod;

[0029] 7. Damper test piece; 71. Piston part; 72. Hydraulic part; 8. Second supporting frame; 81. Sliding rod; 82. Second mounting plate; 83. Oil cylinder. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0032] Embodiment 1: This embodiment mainly describes the basic structure and working principle of the integrated dynamic and static performance composite test bench of the hydraulic damper, specifically:

[0033] like Figure 1-Figure 2 As shown, the present application provides a hydraulic damper dynamic and static performance integrated composite test bench, including a base 1, which is a supporting part of the hydraulic damper dynamic and static performance integrated composite test bench, and provides a stable support for the performance test of the hydraulic damper;

[0034] A first support frame 2 is fixedly mounted on one side of the base 1, and a second support frame 8 is fixedly mounted on the other side of the base 1. A test section is formed between the first support frame 2 and the second support frame 8. The performance test of the hydraulic damper is performed in the test section.

[0035] At least two groups of fixed beams 4 are fixedly mounted on the first support frame 2, and the other ends of the fixed beams 4 are fixedly connected to the second support frame 8. At the same time, a moving beam 5 is slidably mounted on the fixed beams 4. When subjected to external force, the moving beam 5 is suitable for sliding on the fixed beam 4.

[0036] Continue to refer Figure 1-Figure 2 A hydraulic cylinder 22 is fixedly installed on one side of the first support frame 2, and the output end of the hydraulic cylinder 22 passes through the first support frame 2 and extends into the test interval. A first fixed end 21 for mounting one end of a hydraulic damper is fixedly installed on the output end of the hydraulic cylinder 22, and a second fixed end 51 corresponding to the first fixed end 21 is fixedly installed on the moving crossbeam 5. The second fixed end 51 is mainly used to clamp and fix the other end of the hydraulic damper, thereby the hydraulic damper can be clamped and fixed in the test interval;

[0037] A first slider 52 is fixedly installed at the bottom of the moving beam 5, and a first slide rail 53 is fixedly installed on the base 1. The first slider 52 is slidably connected with the first slide rail 53, so that when the moving beam 5 slides on the fixed beam 4, the first slider 52 slides on the first slide rail 53. For the convenience of description, the interval between the moving beam 5 and the first supporting frame 2 is defined as the first interval, and the first interval is a part of the detection interval, wherein the size of the first interval space can be controlled by manually adjusting the position of the moving beam 5;

[0038] However, during the test, it is necessary to ensure that the hydraulic damper remains stable after being clamped and fixed, and thus the moving crossbeam 5 needs to be fixed, such as Figure 1As shown, at least two groups of through holes are opened on the first slide rail 53, and a through hole is opened on the first slider 52, and a limit rod (not shown in the figure) is installed at the bottom of the moving beam 5, and the limit rod is set in the through hole. In this embodiment, the limit rod is made of magnetic material, and the bottom end of the moving beam 5 is also made of magnetic material. The limit rod is fixed to the bottom of the moving beam 5 by magnetic attraction, and a PLC control system is set in the base 1 to control the alternating opening or closing of each electrical component. In the initial state, the limit rod is in a powered state and adsorbed on the moving beam. 5, when the position of the moving beam 5 needs to be fixed, the PLC control system controls the limit rod to be powered off, and under the action of gravity, the limit rod falls freely, and finally the lower half of the limit rod is in the through hole, and the upper half is in the through hole. At this time, under the restriction of the limit rod, the first slider 52 can no longer slide on the first slide rail 53. When the position of the moving beam 5 needs to be adjusted, the PLC control system controls the limit rod to be powered on, and under the action of magnetic attraction, the limit rod moves up, and its lower half is separated from the through hole, and then the first slider 52 can continue to slide on the first slide rail 53;

[0039] In this way, if the performance of dampers of different lengths is to be tested, the staff only needs to control the limit rod to be energized through the PLC control system, and the limit rod is adsorbed on the bottom of the moving beam 5, and then the position of the moving beam 5 can be manually adjusted, thereby adjusting the distance between the moving beam 5 and the first supporting frame 2, so as to adapt to dampers of different lengths;

[0040] like Figure 1 As shown, a damper specimen 7 is installed in the first interval, and the damper specimen 7 is the existing hydraulic damper to be tested. The damper specimen 7 is mainly composed of a piston portion 71 connected to the first fixed end 21, and a hydraulic portion 72 connected to the second fixed end 51, wherein the piston portion 71 and the hydraulic portion 72 are slidably connected. When the piston portion 71 is subjected to external pressure, it slides toward the position of the hydraulic portion 72, and the hydraulic portion 72 absorbs the external pressure. After the pressure is released, the hydraulic portion 72 releases the rebound force to drive the piston portion 71 back to the initial position;

[0041] When conducting the damper performance test, the staff first connects and fixes one end of the piston part 71 in the damper specimen 7 to the first fixed end 21, and connects and fixes one end of the hydraulic part 72 to the second fixed end 51, thereby fixing the damper specimen 7 in the first interval. Then the PLC control system starts the hydraulic cylinder 22, and the output end of the hydraulic cylinder 22 extends toward the position direction of the moving beam 5, and drives the piston part 71 to move synchronously. The piston part 71 moves toward the position of the hydraulic part 72, thereby simulating the pressure scene of the hydraulic damper in actual working conditions. When the hydraulic cylinder 22 outputs to the extreme position, it will maintain pressure for a certain period of time. After the pressure is maintained, the hydraulic cylinder 22 is closed, and the output end of the hydraulic cylinder 22 retracts, and drives the piston part 71 to retract synchronously, thereby completing the pressure performance test of the damper specimen 7, and in the subsequent process, the above-mentioned detection steps can be repeated to perform a pressure fatigue performance test on the damper specimen 7;

[0042] In order to improve the efficiency of hydraulic damper performance testing, such as Figure 1-Figure 2 As shown, a first mounting plate 54 is fixedly mounted on the other side of the moving crossbeam 5, and a slide bar 81 is slidably mounted on the second support frame 8. The slide bar 81 penetrates the second support frame 8, and a second mounting plate 82 is fixedly mounted on the side of the slide bar 81 corresponding to the moving crossbeam 5. A second interval is formed between the second mounting plate 82 and the first mounting plate 54. In this embodiment, the first mounting plate 54 and the second mounting plate 82 are also convenient for fixing the damper specimen 7, and another group of damper tests are performed in the second interval;

[0043] It should be noted that, since both the first interval and the second interval are within the test interval, when the position of the movable crossbeam 5 changes, the interval sizes of the first interval and the second interval change simultaneously, so as to adapt to the performance test of dampers of different sizes;

[0044] Continue to refer Figure 2 A cylinder 83 is fixedly mounted on the second support frame 8, and the output end of the cylinder 83 passes through the second support frame 8 and is fixedly connected to the second mounting plate 82, so that when the cylinder 83 is started, it is suitable for driving the second mounting plate 82 to move synchronously;

[0045] It is understandable that the staff fixes the damper specimen 7 to the first mounting plate 54 and the second mounting plate 82 respectively, and then starts the cylinder 83 to perform the performance test of the damper. In this way, the performance test of the damper can be performed simultaneously in the first interval and the second interval, and the size of the first interval and the second interval can be adjusted by adjusting the position of the movable beam 5 to adapt to the performance test of dampers of different sizes.

[0046] Embodiment 2: The above embodiment allows the performance tests of dampers of different sizes to be performed at the same time by setting up a double station. However, the integrated composite test bench for dynamic and static performance of hydraulic dampers needs to perform performance tests on a large number of hydraulic dampers of different models. However, among the numerous hydraulic dampers, there are hydraulic dampers of longer sizes. At the same time, after testing a large number of dampers, the mounting end of the damper performance testing device may be slightly loose. Therefore, when the performance test is performed on the damper of longer size, only its two ends are often fixed. During the process of applying pressure, the damper may tilt and deviate from the axis, thereby affecting the accuracy of the damper test results.

[0047] In order to solve this problem, this embodiment adds an auxiliary guide structure on the basis of the above embodiment to ensure that the piston part 71 maintains the same axis and does not deviate during the movement. Specifically:

[0048] like Figure 3-Figure 4 As shown, a guide device 3 is fixedly installed on the base 1, and the guide device 3 includes a second slide rail 31 fixedly installed on the base 1, and a second slider 32 is slidably installed on the second slide rail 31. The second slide rail 31 and the first slide rail 53 are arranged in the same direction. When subjected to external force, the second slider 32 is suitable for sliding on the second slide rail 31. In this embodiment, the second slide rail 31 and the first slide rail 53 are arranged in the same direction and are horizontally arranged, mainly to limit the motion trajectory of the second slider 32;

[0049] A support plate 33 is fixedly mounted on the second slider 32, and a bottom plate 34 is fixedly mounted on the top of the support plate 33. When the second slider 32 slides on the second slide rail 31 under the action of an external force, the bottom plate 34 slides synchronously. A lifting cylinder 35 is also fixedly mounted on the bottom plate 34. The output end of the lifting cylinder 35 is far away from the bottom plate 34, and a guide clamp 6 for clamping the piston part 71 is fixedly mounted on the top of the lifting cylinder 35. When the lifting cylinder 35 is started, its output end is suitable for driving the guide clamp 6 to move upward synchronously.

[0050] like Figure 4-Figure 5 As shown, the guide clamp 6 includes a head connector 61 fixedly mounted on the output end of the lifting cylinder 35, and hinge rods 62 are hingedly mounted on both sides of the head connector 61, and a clamping plate 63 is fixedly mounted on the other end of the hinge rod 62, and the clamping plate 63 is mainly used to contact with the piston part 71 and clamp the piston part 71;

[0051] A slot is provided on the head connecting member 61, a return spring (not shown in the figure) is fixedly installed at the bottom of the slot, a control rod 64 is fixedly installed on the return spring, and the control rod 64 is connected to the hinge rods 62 on both sides. In the initial state, the control rod 64 is lifted up by the return spring, the top of the control rod 64 protrudes out of the slot, and the angle between the hinge rod 62 and the control rod 64 is a right angle. At the same time, the clamping plate 63 is in an open state and cannot clamp the piston part 71.

[0052] When the control rod 64 is squeezed by an external force, it moves downward toward the direction of the lifting cylinder 35, and the return spring is compressed. When the control rod 64 moves downward, it drives the hinge rod 62 to move, and the hinge rod 62 flips toward the position of the control rod 64. The angle between the hinge rod 62 and the control rod 64 changes from a right angle to an acute angle, and the angle keeps shrinking. As the hinge rod 62 moves, the clamping plates 63 are driven to move closer to each other, and the spacing between the clamping plates 63 on both sides gradually decreases, and finally moves to both sides of the piston part 71 to clamp the piston part 71. Figure 5 As shown in, at this time the guide jaw 6 is clamped state;

[0053] Furthermore, when the damper performance test is performed, after the damper specimen 7 is installed, the PLC control system can control the lifting cylinder 35 to open, and assist in guiding the damper specimen 7. The lifting cylinder 35 is opened to drive the guide clamp 6 to move upward, and at the same time, the control rod 64 is continuously moved upward to contact the piston part 71. Since the damper specimen 7 is in a fixed state at this time, as the lifting cylinder 35 is continuously moved upward, the control rod 64 is squeezed, and the return spring is compressed. As the control rod 64 moves downward, the hinge rod 62 is driven to move synchronously, thereby driving the clamping plate 63 When the output end of the lifting cylinder 35 is extended to the limit position, only a small part of the control rod 64 protrudes out of the slot, and the clamping plate 63 also clamps the piston 71 tightly. It should be noted that the height of the clamping plate 63 is greater than the diameter of the piston 71, and the clamping plate 63 is suitable for surrounding and clamping the piston 71. When the clamping plate 63 clamps the piston 71, the top of the clamping plate 63 contacts the top of the piston 71, and the bottom of the piston 71 contacts the control rod 64 to prevent it from deviating up and down.

[0054] Then the hydraulic cylinder 22 is started to perform a performance test on the damper specimen 7. When the output end of the hydraulic cylinder 22 drives the piston part 71 to move, the clamping plate 63 clamps the piston part 71, and then the movement of the piston part 71 drives the guide clamp 6 to move synchronously. The movement of the guide clamp 6 is determined by the lifting cylinder 35, the bottom plate 34 and the second slider 32. The second slider 32 slides on the second slide rail 31, and the movement trajectory of the second slider 32 is limited by the second slide rail 31. When the piston part 71 deviates during the movement, it is clamped by the guide clamp 6, and the position and movement trajectory of the guide clamp 6 are consistent with the second slide rail 31. The second slide block 32 remains consistent and is limited by the second slide rail 31, so that during the movement, the piston portion 71 is limited by the guide clamp 6, and the clamping plate 63 surrounds and clamps the piston portion 71, thereby preventing the piston portion 71 from tilting up and down. The piston portion 71 can only move in the horizontal direction and cannot be offset. It should be noted that when the piston portion 71 moves to the extreme position driven by the hydraulic cylinder 22, part of it will still protrude from the hydraulic portion 72 instead of being completely retracted into the hydraulic portion 72, and the protruding part is the part clamped by the clamping plate 63, so that the clamping of the piston portion 71 by the guide clamp 6 does not affect the performance detection of the damper;

[0055] When the hydraulic cylinder 22 is subsequently closed to drive the piston part 71 to move, the guide clamp 6 also limits the piston part 71, and it cannot be offset when retreating. It should be added that if the damper specimen 7 undergoes multiple rounds of pressure performance tests, the pressure performance test becomes a fatigue performance test, and during the fatigue performance test, part of the damper specimen 7 may be fatigued. After being squeezed, the piston part 71 is driven by the hydraulic cylinder 22 to restore to its initial state, but the damper specimen 7 body is already fatigued. When the piston part 71 restores to its initial state, if the first fixed end 21 is slightly loose after multiple tests, the piston part 71 will be offset downward due to the fatigue of the damper specimen 7 itself, and its axis will not remain horizontal at the beginning, which will also affect the test results in subsequent tests.

[0056] In this embodiment, after the guide clamp 6 clamps the piston part 71, it can ensure that the piston part 71 is in a horizontal state throughout the whole process. The axis of the second slide rail 31 is the axis of the damper specimen 7, which ensures stability during the test.

[0057] Embodiment 3: The above embodiment sets up the guide device 3. When the damper specimen 7 is subjected to the performance test, the motion trajectory of the piston part 71 is limited by the guide clamp 6, thereby further ensuring the stability of the test. However, during the test of the damper specimen 7, the piston part 71 often moves to the limit position. When the hydraulic part 72 is subjected to a large pressure, the piston part 71 may be offset. In addition, when the piston part 71 returns to the initial position under fatigue, it may also be offset. Therefore, the piston part 71 is often in a normal state during the movement. However, in the above process, the guide clamp 6 is an auxiliary guide throughout the whole process. At the same time, the movement of the guide clamp 6 depends on the piston part 71 to move by starting the hydraulic cylinder 22. This undoubtedly shares a small part of the thrust of the hydraulic cylinder 22 on the piston part 71. At the same time, the thrust is related to the friction between the second slider 32 and the second slide rail 31.

[0058] In order to reduce the error of the detection data, the structure of the second slide rail 31 is improved in this embodiment, specifically: Figure 4 , such as 6- Figure 7 As shown, first, in this embodiment, a connecting rod 36 is fixedly installed on the bottom plate 34, and the other end of the connecting rod 36 is fixedly connected to the output end of the hydraulic cylinder 22, so that when the output end of the hydraulic cylinder 22 is extended, the first fixed end 21 and the connecting rod 36 will be driven to move synchronously, and the connecting rod 36 is fixedly connected to the bottom plate 34, so that the bottom plate 34 moves synchronously, and finally drives the lifting cylinder 35 and the second slider 32 to move synchronously. The second slider 32 is changed from being passive in the second embodiment to being directly driven by the hydraulic cylinder 22 in this embodiment, and no longer needs to be driven by the piston part 71, thereby reducing the error of the test result;

[0059] Continue to refer to Figure 4 , Figure 6-Figure 7 The second slide rail 31 is composed of a first section 311, a second section 312 and a third section 313 connected in sequence end to end. In this embodiment, the level of the third section 313 is lower than the level of the first section 311, wherein the third section 313 is farther from the piston portion 71, and the first section 311 is closer to the piston portion 71;

[0060] The second section 312 is a connecting section between the first section 311 and the third section 313, one end of which is connected to the first section 311 and continuously tilts downward in a direction away from the first section 311 until it is connected to the third section 313;

[0061] In the initial state, the second slider 32 is at the first section 311. At this time, the lifting cylinder 35 is started, and its output end drives the guide clamp 6 to move upward. Since the distance between the first section 311 and the piston part 71 is relatively close, after the guide clamp 6 moves upward, and as the lifting cylinder 35 is continuously driven, the control rod 64 will be squeezed, and the clamping plate 63 is suitable for clamping both sides of the piston part 71. At this time, the guide clamp 6 plays an auxiliary clamping role on the piston part 71;

[0062] As the hydraulic cylinder 22 continues to move, the second slide block 32 slides through the first section 311 and enters the second section 312. Since the second section 312 is inclined, the distance between the second section 312 and the piston portion 71 increases. As the hydraulic cylinder 22 continues to move, the distance between the lifting cylinder 35 and the piston portion 71 will also increase. Since the stroke of the lifting cylinder 35 is fixed, as the distance between the lifting cylinder 35 and the piston portion 71 increases, the control rod 64 gradually moves upward under the action of the return spring, and the clamping plate 63 gradually releases the clamping force on the piston portion 71. At this time, the guide clamping jaw 6 no longer generates a clamping force on the piston portion 71.

[0063] When the second slide rail 31 moves in the third section 313, since the third section 313 is far away from the piston portion 71, the guide clamping jaw 6 has no clamping force on the piston portion 71 and no longer plays an auxiliary guiding role.

[0064] In the above process, it can be understood that when the second slider 32 slides in the first section 311, the guide jaw 6 clamps the piston part 71, and the guide jaw 6 assists in guiding the piston part 71. When the second slider 32 slides in the second section 312, the guide jaw 6 gradually relaxes from the clamped state, and when the second slider 32 slides in the third section 313, the guide jaw 6 is in a completely relaxed state. In this process, the guide jaw 6 no longer generates a clamping force on the piston part 71.

[0065] To summarize, due to the change in the track of the second slide rail 31, the distance between it and the piston part 71 at different stages is changed, thereby controlling the clamping or loosening of the piston part 71 by the guide jaw 6 at different stages. In the present embodiment, the guide jaw 6 will only clamp the piston part 71 in the initial stage for auxiliary guidance, thereby avoiding the axial deviation due to the pull-back force of the hydraulic cylinder 22 when the piston part 71 returns to the initial state after being pressed to the extreme position. At the same time, the piston part 71 after the test is assisted in correction to ensure that the piston part 71 is in the same position at the beginning of each pressure test before the test begins. During the pressure test, the guide jaw 6 will not clamp the piston part 71 throughout the entire process, thereby reducing the possibility of errors in the test data.

[0066] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Hydraulic damper dynamic and static performance integrated composite test bench, characterized by: include: A base (1), a first support frame (2) being fixedly mounted on one side of the base (1), a second support frame (8) being fixedly mounted on the other side of the base (1), at least two groups of fixed beams (4) being fixedly mounted on the first support frame (2); a hydraulic cylinder (22), the hydraulic cylinder (22) being fixedly mounted on the first support frame (2), a first fixed end (21) being fixedly mounted on the output end of the hydraulic cylinder (22); a moving crossbeam (5), the moving crossbeam (5) being slidably mounted on the fixed beam (4), a second fixed end (51) being fixedly mounted on the moving crossbeam (5); a damper specimen (7), the damper specimen (7) comprising a first fixed end (21) and a second fixed end (51) being fixedly mounted on the first fixed beam (4); and The damper specimen (7) further comprises a piston portion (71) connected to a fixed end (21), the damper specimen (7) further comprising a hydraulic portion (72) connected to the second fixed end (51), the piston portion (71) being slidably connected to the hydraulic portion (72); a first slide rail (53), the first slide rail (53) being fixedly mounted on the base (1), a first slider (52) being slidably mounted on the first slide rail (53), the first slider (52) being fixedly mounted on the bottom of the moving crossbeam (5); a first mounting plate (54), the first mounting plate (54) being fixedly mounted on the other side of the moving crossbeam (5); and a slide rod (81), the slide rod (81) being slidably mounted on the second supporting frame. (8), a second mounting plate (82) is fixedly mounted on one side of the slide rod (81), a cylinder (83) is fixedly mounted on one side of the second support frame (8), and an output end of the cylinder (83) is fixedly connected to the second mounting plate (82); a guide device (3) is fixedly mounted on the base (1), the guide device (3) comprises a second slide rail (31) fixedly mounted on the base (1), a second slide block (32) is slidably mounted on the second slide rail (31), a support plate (33) is fixedly mounted on the second slide block (32), a bottom plate (34) is fixedly mounted on the top of the support plate (33), and a lifting device (34) is fixedly mounted on the bottom plate (34). A cylinder (35), wherein a guide clamp (6) is fixedly mounted on the top of the lifting cylinder (35); the guide clamp (6) comprises a head connecting piece (61) fixedly mounted on the output end of the lifting cylinder (35); hinged rods (62) are hingedly mounted on both sides of the head connecting piece (61); a clamp (63) is fixedly mounted on the other end of the hinged rod (62); the height of the clamp (63) is greater than the diameter of the piston part (71); a slot is formed on the head connecting piece (61); a return spring is fixedly mounted on the bottom of the slot; a control rod (64) is fixedly mounted on the return spring; and the control rod (64) is fixedly connected to the hinged rod (62);When the clamping plate (63) clamps the piston part (71), the top of the clamping plate (63) contacts the top of the piston part (71), and the bottom of the piston part (71) contacts the control rod (64) to prevent the piston part (71) from deviating up and down; the second slide rail (31) and the first slide rail (53) are in the same direction and are arranged horizontally; a connecting rod (36) is fixedly mounted on the bottom plate (34), and the other end of the connecting rod (36) is fixedly mounted on the output end of the hydraulic cylinder (22). The second slide rail (31) is composed of a first section (311), a second section (312) and a third section (313) connected in sequence end to end; the level of the third section (313) is lower than the level of the first section (311); the third section (313) is farther from the piston part (71), and the first section (311) is closer to the piston part (71); the second section (312) is inclined downward in a direction away from the first section (311); wherein: when the second slide block ( When the second slider (32) slides in the first section (311), the guide clamp (6) clamps the piston part (71). At this time, the guide clamp (6) assists in guiding the piston part (71). When the second slider (32) slides in the second section (312), the guide clamp (6) gradually relaxes from a clamped state. When the second slider (32) slides in the third section (313), the guide clamp (6) is in a completely relaxed state. During this process, the guide clamp The claw (6) no longer generates a clamping force on the piston part (71); the guide claw (6) only clamps the piston part (71) in the initial stage to assist in guiding, thereby preventing the axis from being offset due to the pull-back force of the hydraulic cylinder (22) when the piston part (71) returns to its initial state after being pressed to the limit position, and at the same time assists in correcting the piston part (71) after the test, thereby ensuring that the piston part (71) is in the same position at the beginning of each pressure test before the test begins. ; 2. The integrated dynamic and static performance test bench for hydraulic dampers according to claim 1 is characterized in that: A PLC control system is arranged in the base (1), at least two groups of through holes are provided on the first slide rail (53), a through hole is provided on the first slide block (52), a limit rod is also installed at the bottom of the movable crossbeam (5), the limit rod is located in the through hole, the limit rod and the bottom of the movable crossbeam (5) are both made of magnetic material, and the limit rod is connected to the PLC control system signal.

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