Buffer guide device and vibration test bench with same
The buffering guide device uses hydraulic oil chamber and flange linear bearing to control the piston movement, which solves the problem of overshoot and impacting the cylinder in the test of high-displacement and high-weight specimens, and achieves stable support and cushioning effects, which is suitable for the testing of large-displacement and large-mass specimens.
Patent Information
- Application Number
- CN202422264510.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-14
AI Technical Summary
When testing test pieces with high displacement, high weight and high eccentric torque, the airbag auxiliary support is insufficient, resulting in overshoot and the actuator being out of control, which cannot meet the test requirements of heavy load and large displacement.
The buffer guide device is adopted, and the hydraulic oil chamber and flange linear bearing are used to control the piston movement through the inlet and exit of the hydraulic oil, providing stable support and buffering, increasing the piston stroke, and setting multiple buffer guide devices to resist overturning torque, and using the stability of the hydraulic oil to avoid overshoot.
The stable test of large displacement, large mass, high center of gravity specimens is achieved, overshoot and actuator impact cylinder, and stable support force is provided, with simple structure and easy installation.
Smart Images
Figure CN223062793U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vibration testing, in particular to a buffer guiding device and a vibration test bench with the same. Background Art
[0002] At present, domestic and foreign hydraulic vibration tables can meet the low-frequency vibration test requirements of low-displacement and low-weight test pieces such as similar packaging transportation, automotive road simulation, building dam vibration, earthquake, and electromechanical equipment. For test pieces that require high displacement, high weight, and large eccentric moment, when the hydraulic exciters meet the displacement requirements, only 4 groups of support and guiding devices are arranged around the working table surface, and the support method mostly adopts the form of airbag-assisted support; however, there are often some test pieces such as shells, heavy missiles, and high-pressure gas cylinders, which all have the common characteristics of high self-weight, high center of gravity, and long stroke requirements in the test. When the vibration table tests heavy loads, due to the small auxiliary support force provided by the airbag and limited buffering effect, "overshoot" often occurs at high frequencies, the actuator loses control, and the phenomenon of cylinder collision appears; currently, there are few targeted studies, and there are few such loading devices on the market that can simultaneously meet the requirements of long stroke and large mass. Restricted by the displacement and load-bearing of the air spring of the manufacturer itself, it cannot meet the requirements of heavy load and large displacement. To meet the test condition requirements, it is necessary to develop a general-purpose device to meet them. Summary of the Invention
[0003] The purpose of the utility model is to address the above problems existing in the prior art and propose a buffer guiding device and a vibration test bench with the same.
[0004] To achieve the above purpose, the following technical solutions can be adopted: A buffer guiding device includes a cylinder body and a guiding shaft disposed in the cylinder body. A piston is disposed on the guiding shaft, and the piston is located in the cylinder body and contacts the inner wall of the cylinder body; a sealing member is disposed at the open end of the cylinder body, and the guiding shaft passes through the sealing member and is disposed in the cylinder body; an oil inlet and an oil outlet are disposed on the cylinder body, and an oil chamber is formed between the piston and the cylinder body. The oil inlet and the oil outlet are both communicated with the oil chamber; when the guiding shaft drives the piston to move upward, hydraulic oil enters the oil chamber through the oil inlet, and when the guiding shaft drives the piston to move downward, the hydraulic oil flows out of the oil chamber through the oil outlet.
[0005] More specifically, a throttle is disposed at the oil outlet.
[0006] More specifically, the sealing member is set as a flange linear bearing, and the flange linear bearing is inserted into the cylinder body.
[0007] More specifically, oil pipe joints are disposed on both the oil inlet and the oil outlet.
[0008] A buffer guiding vibration test bench includes a buffer guiding device, a workbench surface connected to the top of the buffer guiding device, and a base assembly connected to the bottom of the buffer guiding device. An actuator is provided on the base assembly, and the other end of the actuator is connected to the workbench surface.
[0009] More specifically, at least two buffer guiding devices are provided.
[0010] More specifically, four buffer guiding devices are provided.
[0011] More specifically, a conducting oil pipe is provided to connect the four buffer guiding devices.
[0012] More specifically, a pressure gauge is provided on the conducting oil pipe.
[0013] More specifically, the actuator is provided in the middle of the workbench surface.
[0014] A buffer guiding device of the present utility model and a vibration test bench having the same can achieve the following technical effects:
[0015] (1) It can be used for the test requirements of large-displacement, large-mass, and high-center-of-gravity specimens;
[0016] (2) The piston stroke can be customized according to its own needs, increasing the displacement upper limit of the test system, and can be combined to improve the load-bearing capacity, meeting larger displacements, and having better applicability than long-stroke airbags;
[0017] (3) Using hydraulic oil sealed in the oil chamber for buffering and support, avoiding the need for frequent maintenance and inspection due to air leakage of the previous airbags;
[0018] (4) Providing stable hydraulic oil, compared with the continuously changing gas in the previous airbags during movement, the provided support force is more stable, avoiding overshoot caused by large acceleration and large self-mass when the high-load specimen moves downward, and avoiding internal cylinder collision of the actuator;
[0019] (5) The structure is simple and the installation is convenient. Description of the Drawings
[0020] Figure 1 is a three-dimensional structural schematic diagram of the vibration test bench of the present utility model;
[0021] Figure 2 is a front view structural schematic diagram of the vibration test bench of the present utility model;
[0022] Figure 3 is a three-dimensional structural schematic diagram of the buffer guiding device of the present utility model;
[0023] Figure 4It is a schematic cross-sectional structure diagram of the buffer guiding device of the present utility model;
[0024] Figure 5 is of the present utility model Figure 4 enlarged view at position A in
[0025] In the figure: 1. Buffer guiding device; 11. Guide shaft; 111. Piston; 12. Cylinder block; 121. Oil outlet; 122. Oil inlet; 13. Flange linear bearing; 14. Throttle; 15. Oil cavity; 16. Oil pipe joint; →: Flow direction of hydraulic oil;
[0026] 2. Workbench surface; 3. Base assembly; 4. Actuator; 5. Conducting oil pipe; 6. Pressure gauge. Specific embodiments
[0027] To make the purpose, technical solutions and advantages of the implementation of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings in the embodiments of the present utility model. In the drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The described embodiments are some, but not all, of the embodiments of the present utility model. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present utility model. The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
[0029] A buffer guiding device 1, as Figures 3 - 5As shown in the figure, it includes a cylinder block 12 and a guide shaft 11 arranged inside the cylinder block 12. The guide shaft 11 can perform linear motion along the length direction of the cylinder block 12 inside the cylinder block 12. A piston 111 is arranged on the guide shaft 11. The piston 111 is located inside the cylinder block 12 and contacts the inner wall of the cylinder block 12. Further, the piston 111 is arranged at the end of the guide shaft 11. The piston 111 makes the inside of the cylinder block 12 a closed space, ensuring the pressure of the hydraulic oil inside the cylinder block 12 and ensuring the buffering force. The lengths of the cylinder block 12 and the guide shaft 11 are customized according to the test requirements, which maximally ensures the stroke of the piston 111, increases the upper limit of the displacement of the test system, can combine to improve the load-bearing capacity, and can meet a larger displacement.
[0030] A sealing member is arranged at the open end of the cylinder block 12. The guide shaft 11 passes through the sealing member and is arranged inside the cylinder block 12. Further, the sealing member is set as a flange linear bearing 13. The flange linear bearing 13 includes a flange and a linear bearing fixed to the flange. The flange is fixed to the open end of the cylinder block 12. The fixing methods include but are not limited to screwing and adhesion. The linear bearing is inserted inside the cylinder block 12, and the outer wall of the linear bearing fits with the inside of the cylinder block 12. To prevent the guide shaft 11 from twisting during the up and down movement, the flange linear bearing 13 is set to play a role in anti-overturning and anti-eccentric load for the guide shaft 11.
[0031] An oil inlet 122 and an oil outlet 121 are arranged on the cylinder block 12. An oil chamber 15 is formed between the piston 111 and the cylinder block 12. Both the oil inlet 122 and the oil outlet 121 are communicated with the oil chamber 15. Hydraulic oil is arranged inside the oil chamber 15. By providing hydraulic oil with a stable pressure inside the oil chamber 15, a supporting effect is provided for the workbench 2. A throttle 14 is arranged at the oil outlet 121. When the guide shaft 11 drives the piston 111 to move upward, the hydraulic oil enters the oil chamber 15 through the oil inlet 122 to play an auxiliary supporting role for the test. When the guide shaft 11 drives the piston 111 to move downward, the oil chamber 15 is compressed, and the hydraulic oil flows out of the oil chamber 15 through the oil outlet 121. The hydraulic oil is accelerated to be discharged due to the pressure difference inside and outside the throttle 14. At this time, the hydraulic oil plays a role in buffering the whole test, preventing overshoot and loss of control when moving downward due to the excessive weight of the test piece, resulting in the actuator 4 hitting the cylinder.
[0032] Oil pipe connectors 16 are arranged on both the oil inlet 122 and the oil outlet 121 for oil inlet and outlet. The oil pipe connectors 16 can be connected to an oil tank or other oil storage devices. Of course, when it is not convenient to directly connect to the oil storage device, an oil pipe can also be set to be connected to the oil pipe connector 16.
[0033] A buffer guiding vibration test bench, such as Figures 1 - 5As shown in the figure, it includes a buffer guiding device 1, a workbench surface 2, a base assembly 3 and an actuator 4.
[0034] The buffer guiding device 1 is arranged between the workbench surface 2 and the base assembly 3. The top of the buffer guiding device 1 is connected to the workbench surface 2. Further, the end of the guiding shaft 11 of the buffer guiding device 1 away from the piston 11 is connected to the workbench surface 2 through a flange. The bottom of the buffer guiding device 1 is connected to the base assembly 3. Further, the cylinder block 12 of the buffer guiding device 1 is connected to the base assembly 3 by bolts. The buffer guiding device 1 plays a role in guiding and supporting the workbench surface 2, and can prevent the influence of the reaction force and overturning moment of heavy-load and high-center-of-gravity specimens on the actuator 4.
[0035] The actuator 4 is arranged between the workbench surface 2 and the base assembly 3. The lower support of the actuator 4 is connected to the base assembly 3, and the upper piston rod of the actuator 4 is connected to the workbench surface 2. In this solution, to meet the large-displacement requirement, the actuator 4 is set as a large-displacement actuator, and the workbench surface 2 is pushed by the large-displacement actuator assembly to provide large-displacement vertical reciprocating motion.
[0036] The number of the actuators 4 is set according to needs. In this solution, one actuator 4 is set. One actuator 4 is arranged at the center of the workbench surface 2, so that the driving force of the actuator 4 on the workbench surface 2 is uniform, and the force on the entire workbench surface 2 is uniform.
[0037] At least two buffer guiding devices 1 are set. In this solution, four buffer guiding devices 1 are set. The four buffer guiding devices 1 are evenly connected to the workbench surface 2. Evenly arranging the buffer guiding devices 1 can make the guiding and supporting of the workbench surface 2 stable. Further, the four buffer guiding devices 1 are respectively arranged at the four corners of the workbench surface 2 and are arranged around the actuator 4 to ensure that when the actuator 4 drives the workbench surface 2 to move up and down, the four buffer guiding devices 1 can stably guide and support the workbench surface 2.
[0038] To better balance the internal pressure of the four buffer guiding devices 1, a conduction oil pipe 5 is arranged to connect the four buffer guiding devices 1, and a pressure gauge 6 is arranged on the conduction oil pipe to facilitate observing the change of the oil pressure in the buffer guiding device 1.
[0039] The working process of the buffer guiding vibration test bench is as follows:
[0040] Place the test piece on the workbench 2. The actuator 4 drives the workbench 2 to move up and down, and the test piece follows the movement. When the actuator 4 drives the workbench 2 to move upward, the guide shaft 11 of the buffer guiding device 1 follows the upward movement, synchronously driving the piston 111 to move upward. The hydraulic oil enters the oil chamber 15 from the oil inlet 122. The flanged linear bearing 13 in the buffer guiding device 1 guides the movement of the workbench 2, ensuring that the workbench 2 moves linearly stably. The hydraulic oil in the oil chamber 15 of the buffer guiding device 1 supports the workbench 2;
[0041] When the actuator 4 drives the workbench 2 to move downward, the guide shaft 11 of the buffer guiding device 1 follows the downward movement, synchronously driving the piston 111 to move downward. The hydraulic oil flows out of the oil chamber 15 from the oil outlet 121. The flanged linear bearing 13 in the buffer guiding device 1 guides the movement of the workbench 2, ensuring that the workbench 2 moves linearly stably. The hydraulic oil in the oil chamber 15 of the buffer guiding device 1 buffers the workbench 2, preventing the actuator 4 from hitting the cylinder. If the mass of the test piece is too large and it cannot be controlled when the actuator 4 drives it to move downward, setting the buffer guiding device 1 can also avoid overshoot and protect the actuator 4.
[0042] A buffer guiding device of the present utility model and a vibration test bench having the same can achieve the following technical effects:
[0043] (1) It can be used for the test requirements of large-displacement, large-mass, and high-center-of-gravity test pieces;
[0044] (2) The stroke of the piston 111 can be customized according to its own needs, increasing the displacement upper limit of the test system, and can be combined to improve the load-bearing capacity, meeting larger displacements, and having better applicability than long-stroke airbags;
[0045] (3) Using the hydraulic oil sealed in the oil chamber 15 for buffering and support, avoiding the frequent maintenance and inspection required for air leakage of airbags in the past;
[0046] (4) Providing stable hydraulic oil, compared with the continuously changing gas in the airbag in the past, the provided supporting force is more stable, avoiding overshoot caused by large acceleration and large self-mass when the high-load test piece moves downward, and avoiding internal cylinder collision of the actuator 4;
[0047] (5) Four groups of guiding devices are provided, with a high anti-overturning moment;
[0048] (6) The structure is simple and the installation is convenient.
[0049] The preferred embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present utility model, various simple modifications can be made to the technical solutions of the present utility model, and these simple modifications all fall within the protection scope of the present utility model.
[0050] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, without conflict, they can be combined in any appropriate manner. To avoid unnecessary repetition, the present utility model will not separately describe various possible combination manners.
[0051] Furthermore, any combination can be made among various different embodiments of the present utility model, as long as it does not violate the idea of the present utility model, and it should also be regarded as the content disclosed by the present utility model.
Claims
1. A buffer guiding device, characterized in that: It includes a cylinder block (12) and a guide shaft (11) arranged inside the cylinder block (12). A piston (111) is arranged on the guide shaft (11). The piston (111) is located inside the cylinder block (12) and contacts the inner wall of the cylinder block (12). A sealing member is arranged at the open end of the cylinder block (12). The guide shaft (11) passes through the sealing member and is arranged inside the cylinder block (12). An oil inlet (122) and an oil outlet (121) are arranged on the cylinder block (12). An oil chamber (15) is formed between the piston (111) and the cylinder block (12). The oil inlet (122) and the oil outlet (121) are both communicated with the oil chamber (15). When the guide shaft (11) drives the piston (111) to move upward, hydraulic oil enters the oil chamber (15) through the oil inlet (122). When the guide shaft (11) drives the piston (111) to move downward, the hydraulic oil flows out of the oil chamber (15) through the oil outlet (121).
2. The buffer guiding device according to claim 1, characterized in that: A throttle (14) is arranged at the oil outlet (121).
3. The buffer guiding device according to claim 1, characterized in that: The sealing member is set as a flange linear bearing (13), and the flange linear bearing (13) is inserted into the cylinder block (12).
4. The buffer guiding device according to claim 1, wherein: Oil pipe joints (16) are arranged on both the oil inlet (122) and the oil outlet (121).
5. A buffer guiding vibration test bench, characterized in that: It includes a buffer guiding device (1) according to any one of claims 1-4, a workbench surface (2) connected to the top of the buffer guiding device (1), and a base assembly (3) connected to the bottom of the buffer guiding device (1). An actuator (4) is arranged on the base assembly (3), and the other end of the actuator (4) is connected to the workbench surface (2).
6. The buffer guiding vibration test bench according to claim 5, characterized in that: At least two buffer guiding devices (1) are arranged.
7. The buffer guiding vibration test bench according to claim 6, characterized in that: Four buffer guiding devices (1) are arranged.
8. The buffer guiding vibration test bench according to claim 7, characterized in that: A conducting oil pipe (5) is arranged to connect the four buffer guiding devices (1).
9. The buffer guiding vibration test bench according to claim 8, wherein: A pressure gauge (6) is arranged on the conducting oil pipe (5).
10. The buffer guiding vibration test bench according to claim 5, characterized in that: The actuator (4) is arranged in the middle of the workbench surface (2).