Equipment for testing performance of buffer

Abstract

The invention relates to the technical field of equipment testing, and particularly discloses buffer performance testing equipment which comprises a top plate and a bottom plate, a plurality of supporting rods are arranged between the top plate and the bottom plate, a box body which moves in the length direction of the supporting rods and is provided with an opening in the bottom is arranged among the supporting rods, and a first sliding block is installed on the side wall of the box body; a movable plate is arranged at an opening in the bottom of the box body, and a flexible sealing piece is arranged between the edge of the movable plate and the inner side wall of the box body, so that the interior of the box body is a sealed cavity; at least two telescopic mechanisms are installed between the top face of the movable plate and the top face of the box body, and the telescopic ends of the telescopic mechanisms are rotationally connected with the movable plate. A connecting cylinder communicated with the interior of the box body is mounted at the top of the box body; and a fixed cylinder is mounted at the bottom of the top plate. According to the device, the incompressibility principle of liquid is utilized, linear adjustment of the impact force angle of the buffer is achieved, and linear adjustment of the impact force of the buffer can be conducted very linearly and conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment testing, and in particular to a device for testing the performance of a buffer. Background Art

[0002] As a mechanical device, the main function of the buffer is to control and reduce the movement speed and energy of mechanical parts and improve the safety of mechanical parts during use. In order to ensure the safety of the buffer during use, it is necessary to use testing equipment to detect the performance of the buffer in all aspects, and the most common method is to perform pressure testing on it. There are two test methods for pressure testing, one is impact test (dynamic test) and the other is extrusion test (static test). These two test methods mainly depend on the actual application scenario of the buffer. For buffers suitable for sudden impacts, such as buffers for car bumpers and buffers for elevators, impact tests are required. For buffers used statically, such as buffers for building seismic isolation and buffers for heavy machinery support, only extrusion tests are required.

[0003] Whether it is an impact test or an extrusion test, the buffer needs to be impacted or extruded from different angles to test the shock absorption effect of the buffer at different inclination angles. In addition, in the impact test of the buffer, it is also necessary to detect the shock absorption effect of the buffer under different impact forces.

[0004] For angle adjustment, in order to avoid the angle adjustment components inside the test equipment from being damaged during impact, the commonly used solution is to set the bottom surface of the impact piece as a contact plate that can adjust the angle, and the entire impact piece is solid. For the adjustment of impact force, the commonly used solution is to fill different numbers of load blocks into the impact piece or directly replace load blocks of different weights. For example, a polyurethane buffer performance tester disclosed in a Chinese invention patent (CN117554110A) is provided with a groove at the bottom of the loading box, and an adjustment block with an adjustable inclination angle is installed in the groove. The adjustment block is hinged with the groove, and the adjustment block fits the lower end surface of the solid block. The adjustment is directly flipped by the locking screw, so that the angle between the bottom surface of the adjustment block and the polyurethane buffer body changes, thereby realizing the impact force applied to the buffer in different directions. In this patent, the magnitude of the impact force of the buffer is adjusted by adding different numbers of solid blocks to the loading box.

[0005] Although the above patent technology can easily adjust the angle of the impact force, it can only be adjusted in one plane direction, and the device cannot easily and linearly adjust the magnitude of the impact force (gravity). After searching, it is found that similar solutions are currently used for adjusting the gravity of the impact piece. For example, a Chinese utility model patent (CN217845609U) discloses an elevator buffer performance detection device with gravity adjustment, which adjusts the magnitude of the impact force by directly replacing counterweights of different weights.

[0006] Therefore, in order to solve the above problems, the applicant provides a buffer performance testing device which can adjust the impact angle in multiple directions and can adjust the impact force very conveniently and linearly. Summary of the invention

[0007] The object of the present invention is to provide a device for testing the performance of a buffer, which utilizes the principle of incompressibility of liquid to achieve linear adjustment of the angle of the buffer impact force and can also linearly and conveniently adjust the magnitude of the buffer impact force.

[0008] The present invention is implemented as follows: a device for testing the performance of a buffer comprises a top plate and a bottom plate, a plurality of support rods are arranged between the top plate and the bottom plate, a box body which is movable along the length direction thereof and has an opening at the bottom is arranged between the plurality of support rods, a slider is arranged on the side wall of the box body, the slider is slidably sleeved on the support rods, a movable plate is arranged at the bottom opening of the box body, a flexible sealing member is arranged between the edge of the movable plate and the inner wall of the box body, so that the interior of the box body is a sealed chamber; at least two telescopic mechanisms are arranged between the top surface of the movable plate and the top surface of the box body, and the telescopic ends of the telescopic mechanisms are rotatably connected to the movable plate; A connecting cylinder connected to the interior of the box is installed on the top of the box, a fixed cylinder is installed on the bottom of the top plate, and a clamping assembly is installed on the side wall of the connecting cylinder. The clamping assembly is used to control the connection and separation of the fixed cylinder and the connecting cylinder; A guide cylinder is installed on the inner top of the box body, and a plurality of through holes are opened on the side wall of the guide cylinder. A floating ball matching the inner diameter of the guide cylinder is placed in the guide cylinder, and a push rod 1 is installed on the top of the floating ball. The push rod 1 can push the clamping assembly open to realize the separation of the connecting cylinder and the fixed cylinder; a limiting ring 1 is provided in the connecting channel connecting the cylinder and the box body, and when the push rod 1 pushes the clamping assembly open, the floating ball and the limiting ring 1 are in contact to realize sealing; The side walls of the fixed cylinder and the connecting cylinder are respectively provided with at least two corresponding slots and grooves; the number of the clamping assembly is the same as that of the slots, and the clamping assembly includes a C-shaped clamping block, a second spring, and a sliding rod; one end of the clamping block is located in the groove and is in sliding contact with the side wall of the groove, and when the fixed cylinder is connected to the connecting cylinder, the other end of the clamping block is clamped in the clamping slot, and one end of the clamping block located in the groove is connected to the sliding rod and the second spring at the same time; the end of the second spring away from the clamping block is connected to the bottom of the groove, and the sliding rod passes through the bottom surface of the groove and is located inside the connecting cylinder, and the bottom surface is wedge-shaped; A liquid storage tank is arranged on the top of the top plate, and a pipeline for supplying liquid to the box body is arranged between the liquid storage tank and the box body; a driving mechanism for controlling the lifting of the box body is arranged on the top of the top plate.

[0009] Furthermore, the telescopic mechanism includes a stepper motor, a screw rod and a lifting cylinder; the stepper motor is fixedly connected to the top surface of the box body, the output end of the stepper motor is fixedly connected to the top of the screw rod, the lifting cylinder is sleeved on the screw rod, and the bottom of the lifting cylinder is rotatably connected to the top surface of the movable plate.

[0010] Furthermore, the pipeline is pipeline one, the two ends of which are respectively connected to the liquid storage tank and the fixed cylinder, and a two-way pump one is installed on pipeline one; an elastic one-way valve is provided in the fixed cylinder, and a push rod is fixedly installed in the connecting cylinder. When the fixed cylinder and the connecting cylinder are in a connected state, the push rod pushes open the elastic one-way valve.

[0011] Furthermore, the elastic one-way valve includes a bracket, a spring 1, a sealing plate and a limit ring 2; the bracket and the limit ring 2 are fixedly installed on the inner wall of the fixed cylinder, the limit ring 2 is located directly below the bracket, and the two ends of the spring 1 are respectively fixedly connected to the bracket and the sealing plate. When the push rod 2 is separated from the sealing plate, the sealing plate contacts the limit ring 2.

[0012] Furthermore, the pipeline is pipeline 2, which is a hose. Both ends of pipeline 2 are connected to the liquid storage tank and the box body respectively. The length of pipeline 2 is greater than the height of the support frame. Bidirectional pump 2 is provided on pipeline 2.

[0013] Furthermore, the driving mechanism includes a driving motor, two rollers, two cables and a power transmission belt. The two cables are respectively wound around the two rollers. The free ends of the cables are fixedly connected to the top of the box. The output end of the driving motor is fixedly connected to the axis of one of the rollers. The power transmission belt is simultaneously sleeved on the rotating shafts of the two rollers.

[0014] Furthermore, the driving mechanism is at least two electric hydraulic rods, the fixed ends of the electric hydraulic rods are fixedly connected to the top plate, and the free ends of the electric hydraulic rods are fixedly connected to the top of the slider one; the side wall of the box body is slidably connected to the slider one.

[0015] Furthermore, the driving structure includes a servo motor and a threaded rod. The servo motor is embedded in the top plate or the bottom plate. One end of the threaded rod is fixedly connected to the output end of the servo motor. The slider is sleeved on the threaded rod. The side wall of the box is slidably connected to the slider.

[0016] Furthermore, a slide groove with a side opening is provided on the side wall of the slider 1 close to the box body, a limit rod is vertically installed in the slide groove, the slider 2 is slidably sleeved on the limit rod, and the side wall of the slider 2 is fixedly connected to the outer wall of the box body; the sliding distance of the slider 2 in the slide groove is greater than the thickness of the sliding rod.

[0017] Furthermore, the flexible sealing member adopts a flexible bellows or a flexible rubber.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. At least two electrically adjustable telescopic mechanisms are arranged on the top surface of the movable plate. The edge of the movable plate is connected to the inner wall of the box body by a flexible seal. The angle of the movable plate can be linearly adjusted through the synergistic effect of the telescopic mechanism to test the shock absorption effect of the buffer at different inclination angles. At the same time, a pipeline is arranged between the box body and the liquid storage tank. The pipeline can fill the box body with liquid. Since the liquid is an incompressible fluid, when the movable plate impacts the buffer, the filled liquid can protect the telescopic mechanism. In addition, the position of the movable plate directly determines the filling amount of the liquid in the box body. In this way, not only can the overall mass of the box body (impact piece) be adjusted very conveniently, but also the adjustment method makes the mass change of the box body very linear, and the impact force can be accurately adjusted according to the test requirements. 2. A guide cylinder is vertically installed on the top of the box body, a floating ball is arranged in the guide cylinder, a push rod 1 is fixedly installed on the top of the float ball, and a clamping assembly consisting of a spring 2, a clamping block and a sliding rod is arranged on the connecting cylinder body. When the pipeline continuously injects liquid into the box body, the float ball will rise with the increase of the liquid level. As the push rod 1 and the sliding rod are in conflict, the clamping block is translated to both sides, causing the connecting cylinder body to separate from the fixed cylinder body, so that the box body automatically falls after being filled with liquid; in addition, a limiting ring 1 is arranged in the internal channel of the connecting cylinder body and the box body. When the push rod 1 pushes open the clamping assembly, the float ball contacts the limiting ring 1 at the same time and blocks the through hole position of the limiting ring 1, which can not only ensure that the box body is filled when falling, but also prevent the liquid in the box body from overflowing when hitting or squeezing the buffer, thereby ensuring the accuracy of pressure detection; 3. Connect the fixed cylinder with the pipeline so that the liquid can directly enter the box through the fixed cylinder. At the same time, an elastic one-way valve is arranged in the fixed cylinder, and a second push rod is arranged inside the connecting cylinder. When the connecting cylinder and the fixed cylinder are in a connected state, the second push rod can push the sealing plate upwards, so that the elastic one-way valve is in a passage state, which can ensure that the liquid flows smoothly into the box; when the fixed cylinder is separated from the connecting cylinder, the second push rod is separated from the sealing plate, and the sealing plate blocks the second limit ring under the action of the first spring, so that the box is filled with liquid and the liquid automatically falls down while the pipeline is automatically closed; 4. A sliding groove is provided on the side wall of the slider 1, and the slider 2 is slidably sleeved on the limit rod. The slider 2 is fixedly connected to the outer wall of the box body. In the extrusion test, the above structure is adopted, which can not only allow the movable plate to extrude the buffer with a specified pressure, but also can separate the fixed cylinder and the connecting cylinder after the box body is filled with liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a front view of a buffer performance testing device provided by Embodiment 1 of the present invention; Figure 2 is a top view of a buffer performance testing device provided in Example 1 of the present invention; Figure 3 This is a partial cross-sectional view of a buffer performance test device provided by Embodiment 1 of the present invention when the box body is located at the top; Figure 4 yes Figure 3 The enlarged view of point A in the middle; Figure 5 is a top cross-sectional view of a box provided in Example 1 of the present invention; Figure 6 is a front view of a buffer performance testing device provided by embodiment 2 of the present invention; Figure 7 is a top view of a buffer performance testing device provided by embodiment 2 of the present invention; Figure 8 This is a partial cross-sectional view of a buffer performance test device provided by Embodiment 2 of the present invention when the box body is located at the top; Fig. 9 yes Figure 8 The enlarged view of point A in the middle; Fig.10 is a front cross-sectional view of a buffer performance testing device provided by Example 3 of the present invention; Fig.11 yes Fig.10 The enlarged view of point A in the middle; Fig.12 It is a front cross-sectional view of a buffer performance testing device provided in Example 4 of the present invention.

[0020] Reference numerals in the above drawings: 1. Bottom plate; 2. Support rod; 3. Box; 4. Top plate; 5. Fixed cylinder; 6. Pipeline 1; 7. Power transmission belt; 8. Roller; 9. Liquid storage tank; 10. Cable; 11. Connecting cylinder; 12. Slider 1; 13. Driving motor; 14. Two-way pump 1; 15. Flexible bellows; 16. Stepping motor; 17. Screw rod; 18. Lifting cylinder; 19. Through hole; 20. Movable plate; 21. Guide cylinder; 22. Spring 1; 23. Sealing plate; 24. Limiting ring 2; 25. Spring 2; 26. Block; 27. Sliding rod; 28. Floating ball; 29. ​​Limiting ring 1; 30. Push rod 1; 31. Groove; 32. Slot; 33. Push rod 2; 34. Bracket; 35. Pipe 2; 36. Two-way pump 2; 37. Electric hydraulic rod; 38. Sliding block 2; 39. Slide; 40. Limiting rod; 41. Threaded rod; 42. Servo motor. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] The implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0023] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] Reference Figure 1-Figure 12 The figure shows a preferred embodiment of the present invention.

[0025] Embodiment 1: A device for testing the performance of a buffer, comprising a top plate 4 and a bottom plate 1, such as Figure 1As shown, two support rods 2 are fixedly installed between the top plate 4 and the bottom plate 1, and a box body 3 is installed between the two support rods 2. The box body 3 and its internal structure constitute an impact piece. In this embodiment, sliders 12 are fixedly installed on both sides of the box body 3. The sliders 12 are slidably sleeved on the support rods 2. The support rods 2 play a guiding role, which can ensure that when the box body 3 moves to the top, the connecting cylinder 11 and the fixed cylinder 5 are smoothly docked. Figure 3 and Figure 5 As shown, in this embodiment, the horizontal cross-section of the box body 3 is a circular ring, and the bottom of the box body 3 is also a circular opening. A circular movable plate 20 is installed at the opening position of the box body 3. The edge of the movable plate 20 is connected to the inner wall of the box body 3 by a flexible sealing member. The flexible sealing member can be a flexible bellows 15 or a flexible rubber. In order to allow the movable plate 20 to have a larger inclination angle, the flexible bellows 15 is used in this embodiment to make the interior of the box body 3 a sealed chamber; 4 telescopic mechanisms are installed between the top surface of the movable plate 20 and the top surface of the box body 3. The 4 telescopic mechanisms are as shown in FIG. Figure 5 Arranged in the manner shown, equal arc length intervals are installed around the center of the movable plate 20; The specific structure of the telescopic mechanism is as follows Figure 3 As shown, it is mainly composed of a stepper motor 16, a screw rod 17 and a lifting cylinder 18. The stepper motor 16 is embedded in the top of the box body 3, the output end of the stepper motor 16 is fixedly connected to the top of the screw rod 17, the lifting cylinder 18 is sleeved on the screw rod 17, and the bottom of the lifting cylinder 18 is connected to the movable plate 20 by a universal joint. It should be noted that as long as the position and angle of the movable plate 20 can be adjusted telescopically, the structure of such a telescopic mechanism is within the protection scope of the present invention.

[0026] Through the coordinated action of the four telescopic mechanisms, not only the position of the movable plate 20 can be adjusted, but also the rotation angle and rotation direction of the movable plate 20 can be adjusted; when the weight of the entire impact piece needs to be adjusted, the stepper motors 16 of the four telescopic mechanisms rotate simultaneously, so that the lifting cylinders 18 move in the same direction, and the lifting cylinders 18 can translate the movable plate 20 along the height direction; in this way, the size of the space inside the box body 3 can be adjusted. The size of the space inside the box body 3 is different, and after being filled with liquid, the mass of the entire impact piece is different, achieving the effect of linear adjustment of the mass of the impact piece.

[0027] Combination Figure 3 and Figure 4 As shown, a connecting cylinder 11 connected to the interior of the box body 3 is fixedly connected to the top of the box body 3, a fixed cylinder 5 is fixedly installed at the bottom of the top plate 4, a liquid storage tank 9 is fixedly installed on the top plate 4, and a pipe 6 is installed on the liquid storage tank 9. The pipe 6 is connected to the fixed cylinder 5, so that a complete liquid inlet passage is formed between the pipe 6, the fixed cylinder 5 and the connecting cylinder 11. Figure 2As shown, a bidirectional pump 14 is installed on the pipe 16. The bidirectional pump 14 adopts a conventional bidirectional pump. The connection with the pipe 16 is determined according to the specific model. It is a conventional design here and will not be repeated. As long as the liquid in the liquid storage tank 9 can be pressurized to be injected into the box body 3 and the liquid in the box body 3 can be reversely pumped into the liquid storage tank 9. In this way, under the action of the bidirectional pump 14, the liquid in the liquid storage tank 9 can be injected into the box body 3. Among them, the liquid can be selected according to the specific test requirements. In this embodiment, for safety and environmental protection, the liquid is water.

[0028] In order to allow the box 3 to be stably fixed and smoothly dropped as needed, Figure 4 As shown, two symmetrically distributed clamping assemblies are arranged on the connecting cylinder 11. The clamping assembly is mainly composed of a clamping block 26, a sliding rod 27 and a spring 25. Two clamping grooves 32 are also symmetrically provided on the outer wall of the fixed cylinder 5, and two grooves 31 are also symmetrically provided on the outer wall of the connecting cylinder 11. The clamping block 26 is "C" shaped, and its two ends are respectively located in the clamping groove 32 and the groove 31. When the connecting cylinder 11 moves upward to contact the fixed cylinder 5, in order to allow the clamping block 26 to translate to both sides, the top surface of the clamping block 26 is set to an inclined surface in this embodiment. The two ends of the spring 25 are fixedly connected to the clamping block 26 and the bottom of the groove 31 respectively, one end of the sliding rod 27 is fixedly connected to the end of the clamping block 26, and the other end passes through the bottom of the groove 31 and is horizontally arranged inside the connecting cylinder 11. When the sliding rod 27 translates to both sides, the clamping block 26 slides out of the clamping groove 32, so that the connecting cylinder 11 and the box 3 will fall downward.

[0029] In order to ensure that the box body 3 automatically falls after being filled with liquid, a trigger mechanism is set in the box body 3, which is mainly composed of a guide cylinder 21, a floating ball 28, a top rod 30 and a limit ring 29. Figure 3 and Figure 4As shown, the top of the guide cylinder 21 is open, and the opening position is fixedly connected to the top of the box body 3 and communicated with the connecting cylinder 11. A plurality of through holes 19 are opened in different directions on the side wall of the guide cylinder 21. The float 28 is located in the guide cylinder 21. When the box body 3 is not filled with liquid, the float 28 is located at the bottom of the guide cylinder 21. In order to be able to draw the liquid in the box body 3 back into the liquid storage tank 9, the through hole 19 of the guide cylinder 21 is close to its bottom. The size of the float 28 matches the size of the guide cylinder 21, and the push rod 1 30 is fixedly installed at the top position of the float 28. As the liquid level in the box body 3 rises, the float 28 and the push rod 1 30 move upward along the guide cylinder 21, and finally the push rod 1 30 pushes the sliding rod 27, so that the sliding rod 27 and the block 26 move toward both sides. In this way, after the box body 3 is filled with water, the box body 3 can automatically fall. In order to allow the push rod 1 30 to smoothly push the sliding rod 27 to move to both sides, the bottom of the sliding rod 27 is set to be wedge-shaped in this embodiment. In addition, in order to keep the box body 3 in a sealed state when it falls, a limit ring 29 is set at the opening of the box body 3. When the push rod 30 completely pushes the sliding rod 27, the floating ball 28 contacts the limit ring 29, thereby closing the channel. In order to improve the sealing effect, the limit ring 29 is set to a structure that bulges upward, so that the floating ball 28 can better seal.

[0030] Since the pipe 1 6 is connected to the fixed cylinder 5, in order to automatically block the end of the fixed cylinder 5 when the box 3 falls, in this embodiment, an elastic one-way valve is also provided inside the fixed cylinder 5, and a push rod 2 33 is also installed inside the connecting cylinder 11 near its top. The specific structure of the elastic one-way valve is as follows: Figure 4 As shown, it is mainly composed of a bracket 34, a spring 1 22, a sealing plate 23 and a limiting ring 24. The bracket 34 and the limiting ring 24 are both fixedly mounted on the inner wall of the fixed cylinder 5, and the bracket 34 is located directly above the limiting ring 24. The two ends of the spring 1 22 are fixedly connected to the bracket 34 and the sealing plate 23 respectively. In the sealing state of the elastic one-way valve, the sealing plate 23 is tightly fitted with the limiting ring 24 by the action of the spring 1 22, so that it blocks the central flow hole 19 of the limiting ring 24. When the connecting cylinder 11 is connected to the fixed cylinder 5, the push rod 2 33 pushes the sealing plate 23 upward, so that a passage is formed between the connecting cylinder 11 and the fixed cylinder 5. When the box body 3 falls, the push rod 2 33 separates from the sealing plate 23, and the sealing plate 23 is fitted with the limiting ring 24 by the action of the spring 1 22 to achieve blocking. In order to reduce the local resistance loss of the fluid, the top surface of the sealing plate 23 is set as follows in this embodiment. Figure 4 The slope shown.

[0031] After the box 3 impacts the buffer, the box 3 needs to be pulled to the initial position. This embodiment adopts the method of pulling by rope 10. The driving mechanism of this embodiment is mainly composed of a driving motor 13, two rollers 8, two ropes 10 and a power transmission belt 7. The driving mechanism is installed above the top plate 4, the output end of the driving motor 13 is fixedly connected to the axis of one of the rollers 8, the power transmission belt 7 is simultaneously sleeved on the rotating shafts of the two rollers 8, two groups of ropes 10 are respectively wound on the two rollers 8, and one end of the two groups of ropes 10 is fixedly connected to the top of the box 3. In order not to affect the free fall of the box 3, the driving motor 13 adopts a permanent magnet synchronous motor (PMSM) or a brushless DC motor (BLDC), and is equipped with an open circuit protection circuit to balance performance and reliability. When the power is off, there will be no self-locking. In addition, this embodiment also installs an encoder on the shaft of the driving motor 13, which can monitor the speed of the motor in real time, so that the speed of the box 3 falling and hitting the buffer can be obtained.

[0032] In this embodiment, the overall mass of the box body 3 is fixed, and the pressurized flow rate of the two-way pump 14 is fixed, so it is only necessary to calculate the time taken for the box body 3 to be filled with liquid and to fall, and then the amount of water can be calculated, thereby obtaining the mass of the entire impact piece.

[0033] In this embodiment, the buffer is fixed on the bottom plate 1 by the existing technology, which will not be described in detail here.

[0034] Working principle: When the buffer on the bottom plate 1 needs to be subjected to impact tests at different angles and with different impact forces, the controller (not marked in the figure) adjusts the four stepper motors 16 to tilt the movable plate 20 to the specified angle, and adjusts the space inside the box 3, then starts the two-way pump 14 to allow the water in the liquid storage tank 9 to enter the box 3, and the float 28 moves upward along the guide cylinder 21 with the liquid level. When the box 3 is filled, the top rod 1 30 pushes open the two sliding rods 27, and the sliding rod 27 drives the block 26 to move toward both sides, and the float 28 also contacts the limit ring 1 29 to achieve blocking, and the box 3 falls. When the box 3 falls, the sealing plate 23 separates from the top rod 2 33, and the sealing plate 23 is pressed against the limit ring 2 24 by the action of the spring 1 22, thereby blocking the fixed cylinder 5. When the impact is completed, the drive motor 13 drives the drum 8 to rotate, and the drum 8 rolls up the cable 10, thereby pulling the box 3 to the initial position. When the connecting cylinder 11 is connected to the fixed cylinder 5, the block 26 is clamped on the clamping groove 32. At the same time, the push rod 23 pushes the sealing plate 23 upward, and the connecting cylinder 11 is connected with the fixed cylinder 5. In order to allow the two-way pump 14 to normally pump the water in the box 3 into the liquid storage tank 9, at this time, the stepper motor 16 rotates to move the entire movable plate 20 downward, so that the float 28 can move downward with the liquid level. At this time, the entire channel is opened, and the two-way pump 14 can pump water into the liquid storage tank 9.

[0035] Embodiment 2: A device for testing the performance of a buffer, such as Figure 6-9 As shown, the difference between this embodiment and embodiment 1 is that the pipeline for liquid supply is different. In this embodiment, a pipe 2 35 is connected to the liquid storage tank 9. The pipe 2 35 is a hose. The two ends of the pipe 2 35 are connected to the liquid storage tank 9 and the box body 3 respectively. The length of the pipe 2 35 is greater than the height of the support frame. A two-way pump 2 36 is installed on the pipe 2 35. At the same time, the push rod 2 33 and the elastic one-way valve are cancelled. When in use, water is injected into and pumped out of the box body 3 through the soft pipe 2 35.

[0036] The advantage of the solution of this embodiment is that it can stably supply water to the box body 3, the force of the push rod 30 to push the sliding rod 27 is greater, the box body 3 is easier to fall, and the whole device is more stable. And when pumping water, the stepper motor 16 does not need to adjust the position of the movable plate 20. It should be emphasized that as long as water can be pumped from the liquid storage tank 9 into the box body 3, and the water in the box body 3 can also be pumped into the liquid storage tank 9, such a pipeline design is within the protection scope of the present invention.

[0037] Embodiment 3: A device for testing the performance of a buffer, such as Figure 10-11 As shown, the main difference between this embodiment and embodiment 2 is the different driving modes of the driving mechanism. The technical solution of this embodiment is designed for the extrusion test of the buffer. In this embodiment, the driving mechanism adopts an electric hydraulic rod 37, the fixed end of the electric hydraulic rod 37 is fixedly connected to the top plate 4, and the telescopic end is fixedly connected to the slider 12. At the same time, the box 3 and the slider 12 are connected in a sliding manner. Fig.11 As shown, a slide groove 39 with a side opening is provided on the side wall of the slider 12 close to the box body 3, a limit rod 40 is vertically installed in the slide groove 39, the slider 12 is slidably sleeved on the limit rod 40, and the side wall of the slider 12 is fixedly connected to the outer wall of the box body 3; when the movable plate 20 contacts the buffer, a relative displacement will occur between the slider 12 and the box body 3, but under the limiting action of the slide groove 39, the slider 2 38 contacts the top of the slide groove 39, and at this time, the movable plate 20 can squeeze the buffer under the action of the electric hydraulic rod 37. Similarly, when the box body 3 moves upward, the slider 2 38 contacts the bottom of the slide groove 39, and under the action of the slide groove 39, the card block 26 is inserted into the card groove 32.

[0038] Embodiment 4: A device for testing the performance of a buffer, such as Fig.12As shown, the main difference between this embodiment and embodiment 1 is that the driving method of the driving mechanism is different. The driving mechanism of this embodiment is mainly composed of a servo motor 42 and a threaded rod 41. The servo motor 42 is embedded in the top plate 4 or the bottom plate 1. One end of the threaded rod 41 is fixedly connected to the output end of the servo motor 42. The slider 12 is sleeved on the threaded rod 41. The connection method between the box 3 and the slider 12 is the same as that of embodiment 3. The technical solution of this embodiment is also designed for performing an extrusion test on a buffer.

[0039] It should be emphasized that as long as the box body 3 can be driven upward, such a driving mechanism structure is within the protection scope of the present invention.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for testing the performance of a buffer, comprising a top plate (4) and a bottom plate (1), wherein a plurality of support rods (2) are arranged between the top plate (4) and the bottom plate (1), characterized in that: A box body (3) is provided between the plurality of support rods (2) and is movable along the length direction thereof and has an opening at the bottom. A slider (12) is installed on the side wall of the box body (3). The slider (12) is slidably sleeved on the support rod (2). A movable plate (20) is provided at the bottom opening of the box body (3). A flexible sealing member is provided between the edge of the movable plate (20) and the inner side wall of the box body (3), so that the interior of the box body (3) is a sealed chamber. At least two telescopic mechanisms are installed between the top surface of the movable plate (20) and the top surface of the box body (3), and the telescopic ends of the telescopic mechanisms are rotatably connected to the movable plate (20). A connecting cylinder (11) communicating with the interior of the box (3) is installed on the top, a fixed cylinder (5) is installed on the bottom of the top plate (4), and a clamping assembly is installed on the side wall of the connecting cylinder (11), and the clamping assembly is used to control the connection and separation of the fixed cylinder (5) and the connecting cylinder (11); A guide cylinder (21) is installed on the inner top of the box body (3), and a plurality of through holes (19) are opened on the side wall of the guide cylinder (21). A floating ball (28) matching the inner diameter of the guide cylinder (21) is placed in the guide cylinder (21), and a push rod (30) is installed on the top of the floating ball (28). The push rod (30) can push the clamping assembly open to achieve the separation of the connecting cylinder (11) and the fixed cylinder (5); a limiting ring (29) is provided in the connecting channel between the connecting cylinder (11) and the box body (3), and when the push rod (30) pushes the clamping assembly open, the floating ball (28) and the limiting ring (29) are in contact to achieve sealing; At least two corresponding slots (32) and grooves (31) are respectively formed on the side walls of the fixed cylinder (5) and the connecting cylinder (11); the number of the clamping assembly is the same as that of the clamping slots (32), and the clamping assembly comprises a C-shaped clamping block (26), a second spring (25) and a sliding rod (27); one end of the clamping block (26) is located in the groove (31) and is in sliding contact with the side wall of the groove (31); when the fixed cylinder (5) and the connecting cylinder (11) are connected, the other end of the clamping block (26) is clamped in the clamping slot (32); one end of the clamping block (26) located in the groove (31) is connected to the sliding rod (27) and the second spring (25); the end of the second spring (25) away from the clamping block (26) is connected to the bottom of the groove (31); the sliding rod (27) passes through the bottom surface of the groove (31) and is located inside the connecting cylinder (11), and the bottom surface is wedge-shaped; A liquid storage tank (9) is provided on the top of the top plate (4), and a pipeline for supplying liquid to the box body (3) is provided between the liquid storage tank (9) and the box body (3); and a driving mechanism for controlling the lifting of the box body (3) is provided on the top of the top plate (4).

2. A buffer performance testing device according to claim 1, characterized in that: The telescopic mechanism comprises a stepping motor (16), a screw rod (17) and a lifting cylinder (18); the stepping motor (16) is fixedly connected to the top surface of the box body (3), the output end of the stepping motor (16) is fixedly connected to the top of the screw rod (17), the lifting cylinder (18) is sleeved on the screw rod (17), and the bottom of the lifting cylinder (18) is rotatably connected to the top surface of the movable plate (20).

3. A buffer performance testing device according to any one of claims 1 or 2, characterized in that: The pipeline is a pipeline (6), the two ends of which are respectively connected to a liquid storage tank (9) and a fixed cylinder (5), and a two-way pump (14) is installed on the pipeline (6); an elastic one-way valve is arranged in the fixed cylinder (5), and a push rod is fixedly installed in the connecting cylinder (11); when the fixed cylinder (5) and the connecting cylinder (11) are in a connected state, the push rod pushes open the elastic one-way valve.

4. A buffer performance testing device according to claim 3, characterized in that: The elastic one-way valve comprises a bracket (34), a spring (22), a sealing plate (23) and a limiting ring (24); the bracket (34) and the limiting ring (24) are both fixedly mounted on the inner wall of the fixed cylinder (5), the limiting ring (24) is located directly below the bracket (34), the two ends of the spring (22) are respectively fixedly connected to the bracket (34) and the sealing plate (23), and when the push rod (33) is separated from the sealing plate (23), the sealing plate (23) and the limiting ring (24) are in contact.

5. A buffer performance testing device according to any one of claims 1 or 2, characterized in that: The pipeline is a second pipeline (35), which is a hose. The two ends of the second pipeline (35) are respectively connected to the liquid storage box (9) and the box body (3). The length of the second pipeline (35) is greater than the height of the support frame. A two-way pump (36) is arranged on the second pipeline (35).

6. A buffer performance testing device according to claim 1, characterized in that: The driving mechanism comprises a driving motor (13), two rollers (8), two cables (10) and a power transmission belt (7); the two cables (10) are respectively wound around the two rollers (8); the free ends of the cables (10) are fixedly connected to the top of the box body (3); the output end of the driving motor (13) is fixedly connected to the axis of one of the rollers (8); and the power transmission belt (7) is simultaneously sleeved on the rotating shafts of the two rollers (8).

7. A buffer performance testing device according to claim 5, characterized in that: The driving mechanism comprises at least two electric hydraulic rods (37), the fixed ends of the electric hydraulic rods (37) are fixedly connected to the top plate (4), and the free ends of the electric hydraulic rods (37) are fixedly connected to the top of the sliding block (12); the side wall of the box body (3) is slidably connected to the sliding block (12).

8. A buffer performance testing device according to claim 4, characterized in that: The driving structure comprises a servo motor (42) and a threaded rod (41); the servo motor (42) is embedded in the top plate (4) or the bottom plate (1); one end of the threaded rod (41) is fixedly connected to the output end of the servo motor (42); a slider (12) is sleeved on the threaded rod (41); and a side wall of the box body (3) is slidably connected to the slider (12).

9. A buffer performance testing device according to any one of claims 7 or 8, characterized in that: A slide groove (39) with a side opening is provided on the side wall of the slide block (12) close to the box body (3), a limit rod (40) is vertically installed in the slide groove (39), the slide block (38) is slidably sleeved on the limit rod (40), and the side wall of the slide block (38) is fixedly connected to the outer wall of the box body (3); the sliding distance of the slide block (38) in the slide groove (39) is greater than the thickness of the slide rod (27).

10. The buffer performance testing device according to claim 1, characterized in that: The flexible sealing member adopts a flexible bellows (15) or a flexible rubber.

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