Electro-hydraulic servo vibration isolator testing machine

Abstract

The utility model provides an electro-hydraulic servo shock isolator testing machine, which relates to the technical field of shock isolator testing and comprises a workbench, two stand columns are fixedly connected to two sides of the top of the workbench, a cross beam is arranged on the two stand columns, stand column holes are formed in two sides of the cross beam, and the cross beam penetrates through the stand columns through the stand column holes. A servo actuator is fixedly connected to the middle of the cross beam in a penetrating mode, two symmetrically-distributed hydraulic chucks are arranged between the servo actuator and the workbench, clamping pieces used for clamping the stand columns are arranged at the two ends of the cross beam, and reliable clamping of the cross beam and the stand columns is achieved by arranging the clamping pieces composed of cross beam clamping oil cylinders and sunk screws. During dynamic and static tests, the stability and reliability of the cross beam are fully ensured, the test precision is prevented from being influenced by the shaking of the cross beam, the cross beam can be locked still in a non-test state, and the safety of equipment is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of shock isolator testing, especially to electro-hydraulic servo shock isolator testing machine. BACKGROUND

[0002] In the field of material performance testing and industrial part testing, the stability and reliability of the testing machine are crucial. With the continuous development of science and technology, the precision and stability of the testing machine are increasingly required, especially when testing the dynamic and static performance of the isolator.

[0003] However, the existing testing machine has some deficiencies in structural design, for example, some testing machines use a simple mechanical clamping method to fix the cross beam, and the mechanical clamping device is cumbersome to operate, requiring manual adjustment and tightening multiple times, which consumes a lot of time and labor costs, seriously affecting the testing efficiency. SUMMARY

[0004] The utility model aims at solving the problems in the prior art and proposes an electro-hydraulic servo shock isolator testing machine.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an electro-hydraulic servo shock isolator testing machine, comprising a workbench, two vertical columns are fixedly connected to the top of the workbench, a cross beam is arranged on the two vertical columns, vertical column holes are formed in the two sides of the cross beam, the cross beam is arranged through the vertical column holes and the vertical columns, a servo actuator is fixedly connected to the middle of the cross beam, two symmetrically distributed hydraulic chucks are arranged between the servo actuator and the workbench, clamping pieces for clamping the vertical columns are arranged at the two ends of the cross beam, the clamping pieces comprise two cross beam clamping oil cylinders fixedly connected to the two ends of one side of the cross beam and two countersunk head screws inserted into the two ends of the other side of the cross beam, cutouts communicating with the vertical column holes are formed at the two ends of the cross beam, the rod part of the countersunk head screw is arranged through the cross beam, the cutout and the piston sleeve of the cross beam clamping oil cylinder, and one end of the rod part of the countersunk head screw extending through the piston sleeve of the cross beam clamping oil cylinder is fixedly connected with the piston rod of the cross beam clamping oil cylinder.

[0006] Preferably, two oppositely arranged fixed blocks are fixedly connected to the two sides of the workbench by bolts, and a hydraulic rod is clamped and fixed between the two opposite fixed blocks.

[0007] Preferably, one of the hydraulic chucks is fixedly connected with the output shaft of the servo actuator, and the other hydraulic chuck is fixed to the top of the workbench.

[0008] Preferably, two anti-rotation guide rods are arranged through the cross beam and symmetrically distributed around the servo actuator, and the bottom ends of the two anti-rotation guide rods are fixedly connected with an anti-rotation disc fixedly connected with the hydraulic chuck.

[0009] Preferably, the servo actuator is provided with a load sensor, and the load sensor is fixed with the anti-rotation disc through bolts.

[0010] Preferably, the top of the column and the rod body between the two hydraulic clamps are fixedly connected with a stop ring.

[0011] Preferably, two parallel rails are arranged on the two sides of the workbench, the workbench is slidably connected with two oppositely arranged protective plates through the rails on the two sides, the protective plates are fixedly connected with connecting sleeves on the two sides, and a connecting rod is inserted into the two connecting sleeves on the same side of the workbench.

[0012] Preferably, the bottom end of the workbench is fixedly connected with an electric push rod vertically upward, and the piston end of the electric push rod is fixedly connected with the connecting rod.

[0013] Compared with the prior art, the utility model has the advantages and positive effects that,

[0014] 1、The utility model discloses a clamping piece composed of a cross beam clamping oil cylinder and a countersunk screw, which realizes reliable clamping of the cross beam and the column, fully guarantees the stability and reliability of the cross beam during dynamic and static tests, avoids the influence of cross beam shaking on test accuracy, and ensures that the cross beam is locked in place in a non-test state, thereby improving the safety of the equipment.

[0015] 2、The utility model discloses a hydraulic clamp and a servo actuator, which realize accurate dynamic or static testing of the isolator sample, the hydraulic clamp is used for stably clamping the sample, when the output shaft of the servo actuator moves downward, accurate force can be applied to the clamped isolator sample, thereby accurate testing can be carried out. DRAWINGS

[0016] Figure 1 A three-dimensional structure schematic view of an electro-hydraulic servo shock isolator testing machine is provided for the utility model;

[0017] Figure 2 A three-dimensional structure schematic view of a workbench is provided for the utility model;

[0018] Figure 3 A three-dimensional structure schematic view of an anti-rotation disc is provided for the utility model;

[0019] Figure 4 A three-dimensional structure schematic view of a column hole is provided for the utility model;

[0020] Figure 5 A three-dimensional structure schematic view of a cross beam clamping oil cylinder is provided for the utility model.

[0021] Legend: 1. Workbench; 2. Column; 3. Hydraulic rod; 4. Servo actuator; 5. Anti-rotation guide rod; 6. Anti-rotation disc; 7. Load sensor; 8. Crossbeam; 9. Anti-fall ring; 10. Protective plate; 11. Track; 12. Connecting sleeve; 13. Connecting rod; 14. Electric push rod; 15. Fixing block; 16. Crossbeam clamping cylinder; 17. Countersunk screw; 18. Hydraulic chuck; 19. Column hole; 20. Cutout. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0024] like Figures 1-5 As shown, the electro-hydraulic servo vibration isolator testing machine includes a worktable 1. Two columns 2 are fixedly connected to the top two sides of the worktable 1. A crossbeam 8 is installed on the two columns 2. Column holes 19 are opened on both sides of the crossbeam 8, and the crossbeam 8 passes through the column holes 19 and is connected to the columns 2. A servo actuator 4 is fixedly connected through the middle of the crossbeam 8. Two symmetrically distributed hydraulic clamps 18 are arranged between the servo actuator 4 and the worktable 1. Clamping members for clamping the columns 2 are provided at both ends of the crossbeam 8. The clamping members include two clamps fixedly connected to both ends of one side of the crossbeam 8. A crossbeam clamping cylinder 16 and two countersunk screws 17 are inserted into the other two ends of the crossbeam 8. The crossbeam 8 has cutouts 20 at both ends that communicate with the column holes 19. The shank of the countersunk screw 17 passes through the crossbeam 8, the cutouts 20 and the piston sleeve of the crossbeam clamping cylinder 16. One end of the countersunk screw 17 that passes through the piston sleeve of the crossbeam clamping cylinder 16 extends to be fixedly connected to the piston rod of the crossbeam clamping cylinder 16. One hydraulic chuck 18 is fixedly connected to the output shaft of the servo actuator 4, and the other hydraulic chuck 18 is fixed to the top of the worktable 1.

[0025] In this technical solution, a clamping device consisting of a crossbeam clamping cylinder 16 and a countersunk screw 17 is used to reliably clamp the crossbeam 8 and the column 2. When the crossbeam clamping cylinder 16 is working, the piston rod drives the countersunk screw 17 to move, so that the head of the countersunk screw 17 moves closer to the crossbeam clamping cylinder 16, thereby causing the crossbeam 8 parts on both sides of the cut 20 to move closer together, the cut 20 becomes narrower, the column hole 19 deforms, and then clamps the column 2, thereby firmly fixing the crossbeam 8 to the column 2, ensuring that the crossbeam 8 is stable and reliable during dynamic and static tests, and at the same time ensuring that the crossbeam 8 is locked and immovable when not in the test state.

[0026] In addition, by setting the hydraulic chuck 18 for clamping the isolator sample, by setting the servo actuator 4, in operation, the servo actuator 4 can apply precise dynamic or static force to the sample.

[0027] As shown in Figure 2 The workbench 1 is fixedly connected with two oppositely arranged fixed blocks 15 on both sides through bolts, and the hydraulic rod 3 is clamped and fixed between the two opposite fixed blocks 15. The piston end of the hydraulic rod 3 is fixedly connected with the cross beam 8 through bolts.

[0028] In the technical solution, the fixed block 15 is arranged to clamp and fix the hydraulic rod 3, and the hydraulic rod 3 is arranged to push the cross beam 8 up and down. In addition, the fixed block 15 and the hydraulic rod 3 can be disassembled by screwing the bolts, which is convenient for maintenance.

[0029] As shown in Figure 3 The cross beam 8 is penetrated by two anti-rotation guide rods 5 which are symmetrically distributed around the servo actuator 4. The bottom ends of the two anti-rotation guide rods 5 are fixedly connected with the anti-rotation disc 6 which is fixedly connected with the hydraulic chuck 18. The servo actuator 4 is provided with a load sensor 7 which is fixed with the anti-rotation disc 6 through bolts.

[0030] In the technical solution, the anti-rotation disc 6 and the anti-rotation guide rod 5 are arranged to prevent the hydraulic chuck 18 from being deflected in angle when moving under the drive of the servo actuator 4. The load sensor 7 is arranged to test the force value applied by the servo actuator 4 on the test piece during the test.

[0031] As shown in Figure 1 The top end of the stand column 2 and the rod body between the two hydraulic chucks 18 are fixedly connected with the stop ring 9.

[0032] In the technical solution, the stop ring 9 is arranged to limit the movement range of the cross beam 8 and prevent the cross beam 8 from accidentally sliding down and hitting the test piece or bouncing.

[0033] As shown in Figure 1 The workbench 1 is provided with two parallel distributed tracks 11 on both sides. The workbench 1 is slidingly connected with two oppositely arranged protective plates 10 through the tracks 11 on both sides. The protective plates 10 are fixedly connected with connecting sleeves 12 on both sides. The connecting rods 13 are inserted into the connecting sleeves 12 on the same side of the workbench 1. The vertical upward electric push rods 14 are fixedly connected with the workbench 1 at the bottom ends on both sides. The piston ends of the electric push rods 14 are fixedly connected with the connecting rods 13.

[0034] In the technical solution, the electric push rod 14 works, and the stretching and retracting of the piston end of the electric push rod 14 can drive the connecting rod 13 to move, and then the protective plate 10 slides along the track 11, and the upward sliding of the protective plate 10 can surround the workbench 1, so as to prevent the test piece from flying to the outside due to accidental collapse under force.

[0035] Working principle: when in use, the isolator sample to be tested is installed on the hydraulic chuck 18, then the hydraulic rod 3 is started to push the cross beam 8 to adjust the position, then the cross beam clamping cylinder 16 is started to firmly fix the cross beam 8 on the stand column 2 by means of the clamping piece composed of the countersunk screw 17, and then the servo actuator 4 is started to apply dynamic or static force to the sample for testing.

[0036] The wiring diagram of the hydraulic rod 3, the servo actuator 4, the load sensor 7, the electric push rod 14, the cross beam clamping cylinder 16 and the hydraulic chuck 18 in the utility model belongs to the common knowledge in the field, and the working principle is a known technology, and the type is selected according to actual use, so the control mode and wiring arrangement of the hydraulic rod 3, the servo actuator 4, the load sensor 7, the electric push rod 14, the cross beam clamping cylinder 16 and the hydraulic chuck 18 are not explained in detail.

[0037] Further, the cross beam 8 is an integral steel piece finished by fine machining, the cross beam clamping cylinder 16 is a single-piston-rod acting cylinder structure, the Glay ring (American Park) is selected for sealing, and the servo actuator 4 adopts the static pressure support actuator as a power execution mechanism, the friction is small, the starting resistance is small, and the frequency response is high.

[0038] The above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms, and any skilled person in the art can change or modify the above disclosed technical content into equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made according to the technical essence of the utility model to the above embodiments still belong to the protection scope of the utility model technical scheme.

Claims

1. An electro-hydraulic servo shock isolator tester characterized by: The utility model provides a kind of workbench, including workbench (1), the top of workbench (1) is fixedly connected with two columns (2) on both sides, two columns (2) are provided with crossbeam (8), crossbeam (8) both sides are provided with column hole (19), crossbeam (8) is provided with through two columns (2) by column hole (19), the middle part of crossbeam (8) is fixedly connected with servo actuator (4) through, servo actuator (4) is provided with two symmetrical distribution hydraulic chuck (18) between workbench (1), the both ends of crossbeam (8) are provided with clamping piece for clamping column (2), clamping piece includes two crossbeam clamping oil cylinder (16) with the both ends of one side of crossbeam (8) fixedly connected and two countersunk head screw (17) with the both ends of other side of crossbeam (8) are inserted, the both ends of crossbeam (8) are provided with cutout (20) with column hole (19) intercommunication, the rod portion of countersunk head screw (17) is through crossbeam (8), cutout (20) and the piston sleeve of crossbeam clamping oil cylinder (16), and the rod portion of countersunk head screw (17) is fixedly connected with the piston rod of crossbeam clamping oil cylinder (16) with one end of the piston sleeve of crossbeam clamping oil cylinder (16) extending.

2. The electro-hydraulic servo isolator tester of claim 1, wherein: The both sides of workbench (1) are fixedly connected with two oppositely arranged fixed blocks (15) by bolts, and the hydraulic rod (3) is clamped and fixed between the two opposite fixed blocks (15). The piston end of the hydraulic rod (3) is fixedly connected with the crossbeam (8) by bolts.

3. The electro-hydraulic servo isolator tester of claim 1, wherein: One of the hydraulic chucks (18) is fixedly connected with the output shaft of the servo actuator (4), and the other hydraulic chuck (18) is fixed to the top of the workbench (1).

4. The electro-hydraulic servo isolator tester of claim 1, wherein: The crossbeam (8) is penetrated by two anti-rotation guide rods (5) that are symmetrically distributed around the servo actuator (4), and the bottom ends of the two anti-rotation guide rods (5) are fixedly connected with the anti-rotation disc (6) that is fixedly connected with the hydraulic chuck (18).

5. The electro-hydraulic servo isolator tester of claim 4, wherein: The servo actuator (4) is provided with a load sensor (7), which is fixed to the anti-rotation disc (6) by bolts.

6. The electro-hydraulic servo isolator tester of claim 1, wherein: The top end of the column (2) and the rod body between the two hydraulic chucks (18) are fixedly connected with a stop ring (9).

7. The electro-hydraulic servo isolator tester of claim 1, wherein: The both sides of the workbench (1) are provided with two parallelly distributed tracks (11), and the workbench (1) is slidingly connected with two oppositely arranged protective plates (10) through the tracks (11) on both sides. The both sides of the protective plate (10) are fixedly connected with a connecting sleeve (12), and the connecting rod (13) is inserted into the two connecting sleeves (12) on the same side of the workbench (1).

8. The electro-hydraulic servo isolator tester of claim 7, wherein: The both sides of the workbench (1) are fixedly connected with vertically upward electric push rods (14), and the piston end of the electric push rod (14) is fixedly connected with the connecting rod (13).

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