Trunnion and vibration test bench with automatic position adjustment function

Abstract

The present invention discloses an ear shaft with automatic position adjustment function and a vibration test bench, wherein the ear shaft involved comprises a first adapter plate, a second adapter plate and a first air spring, the second adapter plate is arranged to move in a first direction relative to the first adapter plate, the air spring acts between the first adapter plate and the second adapter plate in a compressed state, and the telescopic direction is consistent with the first direction; the ear shaft also comprises a sensing component for sensing the position of the second adapter plate relative to the first adapter plate, and an automatic adjustment component for responding to the sensing signal of the sensing component and automatically adjusting the second adapter plate to the set position of the first adapter plate; in the application of a specific vibration test bench, the ear shaft can better adapt to loads of different masses, avoiding the manual adjustment existing in the prior art, as well as abnormal operation or even damage of the equipment.

Description

Technical Field

[0001] The invention relates to the field of vibration testing, and in particular to a trunnion with automatic position adjustment function and a vibration test bench. Background Art

[0002] A vibration test bench is a device that performs vibration simulation tests on products or components. Through such tests, the seismic performance of a product can be evaluated, providing a reasonable basis for assessing the quality of the product. Therefore, it is now widely used in aerospace, aviation, shipbuilding, automobiles, electronics, communications, home appliances, instrumentation and other industries.

[0003] The ear shaft is an important component of the vibration test bench, which is used to connect the vibration table body and the base, and has the functions of guide support, vibration isolation, etc. In the prior art, the ear shaft usually includes two adapter plates and an air spring acting between the two adapter plates, wherein the two adapter plates are respectively used to connect the vibration table body and the base. When the vibration device is working, the vibration table body will vibrate due to the reaction force. The air spring in the ear shaft can absorb the energy transmitted by the vibration and reduce the resonance level of the vibration test bench base and the external environment.

[0004] During the operation of the vibration test bench, the air spring generates a reaction force after being compressed to support the weight of the vibration table body and the test load. Among them, different mass loads compress the air spring differently. In order to ensure that when the vibration test bench is running, the vibration of the vibration table body will not cause the ear shaft components to collide and affect the normal operation of the equipment, it is necessary to keep the two adapter plates of the ear shaft in a certain relative position. In this way, when the vibration table body carries loads of different masses or in some other situations, it is necessary to manually adjust the air pressure in the air spring, stretch or compress the air spring to adjust the two adapter plates to a certain relative position. This operation is relatively cumbersome; and sometimes it happens that the ear shaft air spring pressure is forgotten to be adjusted, resulting in abnormal operation or even damage to the equipment.

[0005] In view of this, it is necessary to provide an improved technical solution to solve the above problems. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To achieve the above-mentioned purpose of the invention, the present invention provides an ear shaft with an automatic position adjustment function, and its specific design method is as follows.

[0007] An ear shaft with an automatic position adjustment function comprises a first adapter plate, a second adapter plate and a first air spring, wherein the second adapter plate is movably arranged in a first direction relative to the first adapter plate, and the air spring acts between the first adapter plate and the second adapter plate in a compressed state, and the extension direction is consistent with the first direction; the ear shaft also comprises a sensing component for sensing the position of the second adapter plate relative to the first adapter plate, and an automatic adjustment component for responding to a sensing signal of the sensing component and automatically adjusting the second adapter plate to the set position of the first adapter plate.

[0008] Furthermore, the sensing unit includes a pair of photoelectric switches spaced apart in the first direction and a switch trigger sheet cooperating with the pair of photoelectric switches, wherein the width of the portion of the switch trigger sheet used to trigger the photoelectric switch in the first direction matches the spacing between the two photoelectric switches; one of the photoelectric switch and the switch trigger sheet is fixedly arranged relative to the first adapter plate, and the other is fixedly arranged relative to the second adapter plate.

[0009] Furthermore, the automatic adjustment component includes a position adjustment block, a second air spring and an inflation / deflation mechanism. The position adjustment block is fixed relative to the second adapter plate. The second air spring acts on the position adjustment block and the direction of the force is opposite to the direction of the force of the first air spring on the second adapter plate. The inflation / deflation mechanism is used to inflate and deflate the second air spring to adjust its force on the position adjustment block.

[0010] Furthermore, the ear shaft also includes a connecting seat fixed to one end of the first adapter plate, and the second air spring is arranged between the connecting seat and the adjustment block.

[0011] Furthermore, the first adapter plate is fixed with a first bracket on both sides perpendicular to the first direction, and the second adapter plate is fixed with a second bracket on both sides perpendicular to the first direction. The first bracket and the second bracket are arranged in a one-to-one correspondence, and the ear shaft has two first air springs, and each of the first air springs is compressed between a first bracket and the second bracket corresponding to the first bracket.

[0012] Furthermore, the ear shaft also has a pair of guide rods parallel to each other and extending in the same direction as the first direction. The guide rods are fixed relative to one of the first adapter plate and the second adapter plate, and the guide rods are slidably arranged relative to the other of the first adapter plate and the second adapter plate.

[0013] Furthermore, the guide rod is fixedly arranged relative to the second adapter plate, and the guide rod is slidably arranged relative to the first adapter plate; the ear shaft also has a guide rod connecting seat and a spring, the guide rod connecting seat is fixed to the guide rod, the spring is connected between the guide rod connecting seat and the first adapter plate, and the force exerted by the spring on the guide rod connecting seat is opposite to the direction of the force exerted by the first air spring on the second adapter plate.

[0014] The present invention also provides a vibration test table, comprising a vibration table body and a base, wherein the vibration device also has an ear shaft with an automatic position adjustment function as described above, the ear shaft is arranged between the vibration table body and the base, and the first adapter plate is connected to the base, and the second adapter plate is connected to the vibration table body.

[0015] Furthermore, the vibration device has a pair of ear shafts symmetrically arranged on both sides of the vibration table body.

[0016] Furthermore, the first adapter plate is rotatably connected to the base.

[0017] The beneficial effect of the present invention is: based on the ear shaft with automatic position adjustment function provided by the present invention, with the cooperation of the sensing component and the automatic adjustment component, the second adapter plate can be automatically adjusted to the set position of the first adapter plate. In this way, in the application of a specific vibration test bench, it can better adapt to loads of different masses and avoid manual adjustment, abnormal operation or even damage of the equipment in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 The figure is a three-dimensional schematic diagram of an implementation structure of the trunnion of the present invention;

[0020] Figure 2 Shown Figure 1 An enlarged schematic diagram of part a;

[0021] Figure 3 The figure shows the cooperation diagram of the vibration table body and the ear shaft;

[0022] Figure 4 Shown is a side view of the vibration test bench;

[0023] Figure 5Shown is a top view of the vibration test bench;

[0024] Figure 6 The figure shows a schematic diagram of the state of the vibration test bench performing a Z-axis vibration test on a load;

[0025] Figure 7 Shown Figure 6 A schematic diagram of the state of the trunnion in the structure shown;

[0026] Figure 8 The figure shows a schematic diagram of the state of the vibration test bench performing X-axis vibration test on the load;

[0027] Fig. 9 Shown Figure 8 A schematic diagram of the state of the trunnion in the structure shown;

[0028] Fig.10 The figure shows a schematic diagram of the state in which the vibration test bench performs a Y-axis vibration test on the load. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] refer to Figure 1 , Figure 2 As shown, it shows a specific implementation structure of the ear shaft 100 with automatic position adjustment function of the present invention. In this embodiment, the ear shaft 100 includes a first adapter plate 11, a second adapter plate 12 and a first air spring 13. The second adapter plate 12 is arranged to move in the first direction relative to the first adapter plate 11. The air spring 13 acts between the first adapter plate 11 and the second adapter plate 12 in a compressed state, and the expansion and contraction direction is consistent with the first direction. Figure 1 , Figure 2 In the orientation shown, the first direction is the vertical direction in the figure; when the ear shaft 100 is rotated by a certain angle, the first direction is also adjusted by a certain angle relative to the vertical direction shown in the figure.

[0031] It should be understood that the air spring 13 acts on the first adapter plate 11 and the second adapter plate 12 in a compressed state, which means that the air spring 13 has elastic potential energy to drive the first adapter plate 11 and the second adapter plate 12 to move relative to each other in the first direction; the air spring 13 can act directly between the first adapter plate 11 and the second adapter plate 12, and can also act indirectly between the first adapter plate 11 and the second adapter plate 12 through other components.

[0032] In the present invention, the ear shaft 100 also includes a sensing component 16 for sensing the position of the second adapter plate 12 relative to the first adapter plate 11, and an automatic adjustment component for responding to the sensing signal of the sensing component 16 and automatically adjusting the second adapter plate 12 to the set position of the first adapter plate 11.

[0033] Since the second adapter plate 12 is arranged to move in the first direction relative to the first adapter plate 11, during the specific application of the ear shaft 100, due to the different weights of the external load, the second adapter plate 12 will move a certain distance in the first direction relative to the first adapter plate 11, and this movement may cause the parts in the ear shaft 100 to collide and be damaged, affecting the normal operation of related equipment. The induction component 16 and the automatic adjustment component of the ear shaft 100 of the present invention can effectively solve this problem, so that the second adapter plate 12 can be maintained at a set position relative to the first adapter plate 11.

[0034] The present invention also provides a vibration test bench, referring to Figure 3 , Figure 4 As shown, the vibration test table in this embodiment includes a vibration table body 200 and a base 300, wherein the vibration device also has an ear shaft 100 with an automatic position adjustment function as described above, the ear shaft 100 is arranged between the vibration table body 200 and the base 300, and the first adapter plate 11 is connected to the base 300, and the second adapter plate 12 is connected to the vibration table body 200.

[0035] Specifically in this embodiment, the vibration test table has a pair of ear shafts 100 symmetrically arranged on both sides of the vibration table body 200. It should be understood that in the specific implementation process, when a pair of ear shafts 100 are used, the two ear shafts 100 can each have an independent sensing component 16 and an automatic adjustment component, or can share a set of sensing components 16 and automatic adjustment components.

[0036] Furthermore, the first adapter plate 11 is rotatably connected to the base 300. As shown in the figure, the first adapter plate 11 protrudes toward the base 300 to form a rotating shaft 110, and the base 300 is provided with a matching hole (not shown in the figure) that matches the rotating shaft 110 to allow the ear shaft 100 to rotate. Based on this, the vibration table body 200 can rotate under the guidance of the ear shaft 100 and provide vibrations in different directions.

[0037] Based on the ear shaft 100 with automatic position adjustment function provided by the present invention, with the cooperation of the sensing component 16 and the automatic adjustment component, the second adapter plate 12 can be automatically adjusted to the set position of the first adapter plate 11. In this way, in the application of a specific vibration test bench, it can better adapt to loads of different masses and avoid manual adjustment, abnormal operation or even damage of the equipment in the prior art.

[0038] In order to better understand the implementation structure of the trunnion 100 involved in the present invention, the following is combined with Figure 1 , Figure 2 A specific implementation structure is further described:

[0039] like Figure 2 As shown, in this specific embodiment, the sensing unit 16 includes a pair of photoelectric switches spaced apart in the first direction and a switch triggering piece 163 that cooperates with the pair of photoelectric switches; specifically, the pair of photoelectric switches includes a first photoelectric switch 161 and a second photoelectric switch 162. Further, the width of the portion of the switch triggering piece 163 used to trigger the photoelectric switch in the first direction matches the spacing between the two photoelectric switches; specifically in this embodiment, the first photoelectric switch 161 and the second photoelectric switch 162 are both formed with a groove that cooperates with the switch triggering piece 163 for triggering, and the portion of the switch triggering piece 163 used to trigger the photoelectric switch cooperates with the grooves of the two photoelectric switches.

[0040] based on Figure 2 In the structure shown, when the switch trigger piece 163 is located in the grooves of the two photoelectric switches at the same time, it means that the second adapter plate 12 is located at the set position of the first adapter plate 11; and when the switch trigger piece 163 is out of the groove of any photoelectric switch, it can be determined that the second adapter plate 12 is offset from the set position of the first adapter plate 11, and the automatic adjustment component can be controlled to operate based on the direction of the offset until the second adapter plate 12 moves to the set position of the first adapter plate 11.

[0041] Furthermore, in this embodiment, the first photoelectric switch 161 and the second photoelectric switch 162 are both fixedly arranged relative to the first adapter plate 11, and the switch trigger piece 163 is fixedly arranged relative to the second adapter plate 12. In other embodiments of the present invention, the first photoelectric switch 161 and the second photoelectric switch 162 are both fixedly arranged relative to the second adapter plate 12, and the switch trigger piece 163 is fixedly arranged relative to the first adapter plate 11.

[0042] refer to Figure 1 As shown, in this embodiment, the automatic adjustment component includes a position adjustment block 14, a second air spring 15 and an inflation / deflation mechanism (not shown in the figure), the position adjustment block 14 is fixedly arranged relative to the second adapter plate 12, the second air spring 15 acts on the position adjustment block 14 and the direction of the force is opposite to the direction of the force of the first air spring 13 on the second adapter plate 12, and the inflation / deflation mechanism is used to inflate and deflate the second air spring 15 to adjust its force on the position adjustment block 14.

[0043] In a specific embodiment, the ear shaft 100 also has a processor (shown in the figure), which receives the signal of the sensing unit 16 and automatically detects whether the second adapter plate 12 is located at the set position of the first adapter plate 11, and then controls the operation of the charging and discharging mechanism according to the detection result. The charging and discharging mechanism can be a high-pressure gas source, a vacuum machine, etc., which is connected to the second air spring 15. Specifically, the processor controls the charging and discharging process of the second air spring 15 by controlling the opening and closing of the solenoid valve of the charging and discharging mechanism.

[0044] Specifically in the implementation structure of the vibration test bench, the position adjustment block 14 and the second adapter plate 12 are both fixed to the vibration table body 200, so that the position adjustment block 14 is fixedly arranged relative to the second adapter plate 12; the inflation and deflation mechanism is used to inflate and deflate the second air spring 15 to adjust the pressure in the second air spring 15. After the pressure is adjusted, the second air spring 15 and the first air spring 13 balance each other, so that the second adapter plate 12 can be positioned at the set position of the first adapter plate 11.

[0045] Furthermore, the ear shaft 100 also includes a connection seat 112 fixed to one end of the first adapter plate 11, and the second air spring 15 is arranged between the connection seat 112 and the adjustment block 14. Specifically, a receiving cavity (not marked in the figure) is formed between the connection seat 112 and the end of the first adapter plate 11, and the second air spring 15 and the adjustment block 14 are both arranged in the receiving cavity, and the two ends of the second air spring 15 abut the connection seat 112 and the adjustment block 14 respectively.

[0046] In this embodiment, the ear shaft 100 further has a fixing plate 1120 fixed to the connecting seat 112 , and the first photoelectric switch 161 and the second photoelectric switch 162 are both fixed to the fixing plate 1120 , thereby achieving a fixed arrangement of the photoelectric switch relative to the first adapter plate 11 .

[0047] refer to Figure 1 As shown, the air spring 13 in this embodiment indirectly acts between the first adapter plate 11 and the second adapter plate 12 through other components. Specifically, the first adapter plate 11 is fixed with a first bracket 111 on both sides perpendicular to the first direction, and the second adapter plate 12 is fixed with a second bracket 121 on both sides perpendicular to the first direction. The first bracket 111 and the second bracket 121 are arranged in a one-to-one correspondence. The ear shaft 100 has two first air springs 13, and each first air spring 13 is compressed and arranged between a first bracket 111 and a second bracket 121 corresponding to the first bracket 111.

[0048] This is an embodiment, reference Figure 1As shown in the figure, both ends of the first adapter plate 11 in the first direction are formed with protrusions toward one side, and a groove body (not marked in the figure) for accommodating the second adapter plate 12 is formed between the two protrusions. The second adapter plate 12 is arranged in the groove body to be movable in the first direction relative to the first adapter plate 11. The first bracket 111 is fixed to one of the two protrusions away from the second air spring 15.

[0049] In the present invention, in order to realize the movement of the second adapter plate 12 in the first direction relative to the first adapter plate 11, the ear shaft 100 also has a pair of guide rods 17 which are parallel to each other and extend in the same direction as the first direction. The guide rod 17 is fixed relative to one of the first adapter plate 11 and the second adapter plate 12, and the guide rod 17 is slidably arranged relative to the other of the first adapter plate 11 and the second adapter plate 12.

[0050] Specifically in this embodiment, the guide rod 17 is fixedly arranged relative to the second adapter plate 12 and slidably arranged relative to the first adapter plate 11. More specifically, the protrusions at both ends of the first adapter plate 11 in the first direction are formed with through holes for the guide rod 17 to slide with.

[0051] Furthermore, the ear shaft 100 in this embodiment also has a guide rod connection seat 18 and a spring 19, the guide rod connection seat 18 is fixed to the guide rod 17, the spring 19 is connected between the guide rod connection seat 18 and the first adapter plate 11, and the force of the spring 19 on the guide rod connection seat 18 is opposite to the force of the first air spring 13 on the second adapter plate 12. Based on this configuration, it can be ensured that the first adapter plate 11 and the second adapter plate 12 are supported by the first air spring 13.

[0052] In order to better understand the present invention, the following Figure 5-Figure 10 Describe some operating processes of the vibration test bench:

[0053] like Figure 5-Figure 7 As shown, when the load 500 is subjected to a Z-axis vibration experiment, the load 500 is fixed to the top of the vibration table body 200, and the vibration table body 200 drives the load 500 to perform a Z-axis vibration action. During this process, the first air spring 13 bears the pressure from the load 500. When the load 500 of different masses is replaced, the pressure on the first air spring 13 is different, which will drive the second adapter plate 12 to deviate relative to the first adapter plate 11 and deviate from the set position of the first adapter plate 11. However, the ear shaft 100 involved in the present invention can make an adjustment response to the deviation, and with the cooperation of the sensing component 16 and the automatic adjustment component, the second adapter plate 12 can be automatically adjusted to the set position of the first adapter plate 11.

[0054] Further Figure 8-Figure 10As shown, when the load 500 is subjected to an X-axis or Y-axis vibration test, the load 500 is fixed on the bearing platform 400 on the side of the vibration table body 200, and the vibration table body 200 rotates through the ear shaft 100 to provide vibration in the X-axis or Y-axis direction to the load 500 located on the bearing platform 400. In this process, the load 500 does not generate gravity pressure on the vibration table body 200. For the ear shaft 100, it mainly bears the gravity of the vibration table body 200, and the gravity is specifically borne by the guide rod 17. In this way, relative to the Z-axis vibration test, the first air spring 13 will be subjected to a smaller load pressure, and the first air spring 13 will also drive the second adapter plate 12 to deviate; however, the ear shaft 100 involved in the present invention can make an adjustment response to the deflection, and with the cooperation of the sensing component 16 and the automatic adjustment component, the second adapter plate 12 can be automatically adjusted to the set position of the first adapter plate 11.

[0055] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0056] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A trunnion with automatic position adjustment function, comprising a first adapter plate, a second adapter plate and a first air spring, wherein the second adapter plate is arranged to move in a first direction relative to the first adapter plate, and the air spring acts between the first adapter plate and the second adapter plate in a compressed state and the expansion and contraction direction is consistent with the first direction; characterized in that: The ear shaft also includes a sensing component for sensing the position of the second adapter plate relative to the first adapter plate, and an automatic adjustment component for responding to a sensing signal of the sensing component and automatically adjusting the second adapter plate to a set position of the first adapter plate; The automatic adjustment component includes a position adjustment block, a second air spring and an air charging and discharging mechanism, wherein the position adjustment block is fixedly arranged relative to the second adapter plate, the second air spring acts on the position adjustment block and the force direction is opposite to the force direction of the first air spring on the second adapter plate, and the air charging and discharging mechanism is used to inflate and discharge the second air spring to adjust its force on the position adjustment block; The first adapter plate is fixed with a first bracket on both sides perpendicular to the first direction, and the second adapter plate is fixed with a second bracket on both sides perpendicular to the first direction. The first bracket and the second bracket are arranged in a one-to-one correspondence, and the ear shaft has two first air springs, and each of the first air springs is compressed between a first bracket and the second bracket corresponding to the first bracket.

2. The trunnion with automatic position adjustment function according to claim 1, characterized in that: The sensing component includes a pair of photoelectric switches spaced apart in the first direction and a switch trigger sheet cooperating with the pair of photoelectric switches, wherein the width of the portion of the switch trigger sheet used to trigger the photoelectric switches in the first direction matches the spacing between the two photoelectric switches; one of the photoelectric switch and the switch trigger sheet is fixedly arranged relative to the first adapter plate, and the other is fixedly arranged relative to the second adapter plate.

3. The trunnion with automatic position adjustment function according to claim 1, characterized in that: The ear shaft also includes a connecting seat fixed to one end of the first adapter plate, and the second air spring is arranged between the connecting seat and the adjusting block.

4. The trunnion with automatic position adjustment function according to claim 1 or 2, characterized in that: The ear shaft also has a pair of guide rods parallel to each other and extending in the same direction as the first direction. The guide rods are fixed relative to one of the first adapter plate and the second adapter plate, and the guide rods are slidably arranged relative to the other of the first adapter plate and the second adapter plate.

5. The trunnion with automatic position adjustment function according to claim 4, characterized in that: The guide rod is fixedly arranged relative to the second adapter plate, and is slidably arranged relative to the first adapter plate; the ear shaft also has a guide rod connecting seat and a spring, the guide rod connecting seat is fixed to the guide rod, the spring is connected between the guide rod connecting seat and the first adapter plate, and the force exerted by the spring on the guide rod connecting seat is opposite to the direction of the force exerted by the first air spring on the second adapter plate.

6. A vibration test bench, comprising a vibration bench body and a base, characterized in that: The vibration test table also has an ear shaft with an automatic position adjustment function as described in any one of claims 1 to 5, the ear shaft is arranged between the vibration table body and the base, and the first adapter plate is connected to the base, and the second adapter plate is connected to the vibration table body.

7. The vibration test bench according to claim 6, characterized in that: The vibration test table has a pair of trunnions symmetrically arranged on both sides of the vibration table body.

8. The vibration test bench according to claim 6 or 7, characterized in that: The first adapter plate is rotatably connected to the base.

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