Full-automatic electro-hydraulic servo system used based on test bed

Abstract

The invention relates to the technical field of hydraulic systems, and particularly discloses a full-automatic electro-hydraulic servo system used based on a test bed, the full-automatic electro-hydraulic servo system comprises a hydraulic system, a pulse absorber is arranged on the hydraulic system, and a buffer part and a plurality of elastic parts are arranged in the pulse absorber; the buffering component comprises a sealing plate, a first damping plate and a second damping plate, and vent holes are formed in the second damping plate. According to the full-automatic electro-hydraulic servo system used on the basis of the test bed, by arranging the damping adjusting component, when the sealing plate obtains an enough buffering path, the buffering resistance to the sealing plate is reduced, when the first plate body rotates, the baffle is pulled to move through the pull rope, the ventilation cross sectional area of the ventilation hole is increased, the ventilation capacity is increased, and therefore the sealing plate is prevented from being blocked. The resistance to the sealing plate is reduced, and due to the fact that the buffering path is prolonged and the resistance is properly reduced, devices in the tank body can be effectively protected under the condition that it is ensured that external impact force can be effectively buffered, and the service life of the devices in the tank body is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic systems, and in particular to a full-automatic electro-hydraulic servo system based on a test bench. Background Art

[0002] At present, in the field of automobile parts testing, it is necessary to test the important parts of the automobile for resistance to pulling, bending or twisting, etc. The staff usually sets up a complete set of electro-hydraulic servo systems on a test bench to provide a sufficient pressure and precise power source for the above tests to complete the above work. The electro-hydraulic servo system is an automatic control system that combines electrical control and hydraulic drive technology. It controls the movement of the hydraulic actuator through electrical signals and is often used in applications that require large torque and force. It mainly includes a hydraulic system and an electrical control system. Since the hydraulic system will have periodic pulse air pressure and cavitation problems during actual work, it is usually necessary to set a pulse absorber on the hydraulic system to absorb the hydraulic pulse.

[0003] The existing pulse absorber contains elastic components and damping components, which can not only absorb pulses but also reduce the amplitude and frequency. However, when the pulse pressure is different, the corresponding buffering resistance cannot be set, so that when the external impact is too large, the corresponding damping force is also too large, which causes the internal components to bear a large impact force. In the long run, the internal damping components will be damaged and their service life will be reduced. Summary of the invention

[0004] The purpose of the present invention is to provide a fully automatic electro-hydraulic servo system based on a test bench to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A fully automatic electro-hydraulic servo system based on a test bench comprises a hydraulic system, a pulse absorber is arranged on the hydraulic system, and a buffer component and a plurality of elastic components are arranged inside the pulse absorber;

[0007] The buffer component includes a sealing plate, a first damping plate and a second damping plate, wherein the second damping plate is provided with a vent hole to provide resistance to the sealing plate during its movement to absorb the periodic pulse pressure of the hydraulic system;

[0008] A damping adjustment component is provided between the first damping plate and the second damping plate, and the damping adjustment component comprises a deformable plate, and the deformable plate has two states: a combined state and a folded state. When the deformable plate is in the combined state, the position of the first damping plate is locked;

[0009] The sealing plate is provided with a trigger component, and when the external impact force reaches a set value, the trigger component causes the deformable plate to be in a folded state, unlocks the position of the first damping plate, and extends the buffer path of the sealing plate.

[0010] Furthermore, the damping adjustment component also includes a pair of push rods, the first damping plate is provided with a guide hole, the push rods move in the guide hole, the top of the push rods is provided with a first inclined groove, and the push rods drive the deformable plate to fold during the upward movement.

[0011] Furthermore, the deformable plate includes a first plate body and a second plate body rotatably connected thereto, the first plate body and the second plate body initially conflict with each other, a touch rod is fixedly connected to the side end of the second plate body, a second inclined groove is provided at the side end of the touch rod, and during the movement of the top rod, the second plate body is driven to tilt by the touch rod.

[0012] Furthermore, the trigger component includes a fixed column fixedly connected to the top surface of the sealing plate, the side end of the fixed column is slidably connected to a counterweight block, the top of the fixed column is rotatably connected to an opening and closing plate, a traction rope is fixedly connected between the counterweight block and the opening and closing plate, the opening and closing plate is initially in a closed state, and when the fixed column and the counterweight block undergo relative displacement, the opening and closing plate is opened by the traction rope.

[0013] Furthermore, a slide groove is provided at the side end of the fixing column, a reset piece is provided between the counterweight block and the slide groove, and the counterweight block is snap-connected to the inside of the slide groove through a buckle.

[0014] Furthermore, an aperture adjustment component is provided on the vent hole, and the aperture adjustment component includes a baffle, and a pull rope is fixedly connected between the baffle and the first plate body. When the first plate body rotates, the baffle is driven to move through the pull rope to increase the aperture of the vent hole.

[0015] Furthermore, an elastic rope is fixedly connected between the opening and closing plate and the fixed column, and an abutment column is fixedly connected to the top of the fixed column.

[0016] Optionally, the push rod adopts a telescopic structure, and the push rod includes a sliding rod and a bottom rod. The inside of the sliding rod is fixedly connected to a magnetic ring, and the outer end of the bottom rod near the top is fixedly connected to an iron ring. When the push rod is subjected to a set pressure, it will shrink.

[0017] In the above technical solution, the fully automatic electro-hydraulic servo system based on the test bench provided by the present invention has the following beneficial effects:

[0018] By setting a damping adjustment component, when the sealing plate obtains a sufficient buffering path, the buffering resistance to it is reduced. When the first plate body rotates, the baffle is pulled to move by the pull rope, so that the ventilation cross-sectional area of ​​the vent hole increases, the ventilation volume increases, and the resistance to the sealing plate is reduced. Since the buffering path is extended and the resistance is appropriately reduced, the internal components of the tank body can be effectively protected while ensuring effective buffering of external impact forces, thereby extending the service life of the internal components of the tank body, and the pulse absorber is transformed from the original "hard" damping to "soft" damping, and the buffering effect can be guaranteed to remain unchanged.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0020] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the overall internal structure provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the external structure of a pulse absorber provided in an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the internal cross-sectional structure of a pulse absorber provided in an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the structure of a buffer component provided by an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of the structure of a trigger component provided by an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of the structure of a damping adjustment component provided in an embodiment of the present invention;

[0028] Figure 7 A bottom view structural diagram of a second damping plate provided in an embodiment of the present invention;

[0029] Figure 8 A schematic diagram of a cross-sectional structure of a push rod in Example 2 provided in an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1. Hydraulic system; 2. Pulse absorber; 3. Buffer component; 31. Sealing plate; 32. First damping plate; 33. Second damping plate; 34. Vent; 4. Elastic member; 5. Damping adjustment component; 51. Deformation plate; 511. First plate body; 512. Second plate body; 513. Touch rod; 514. Second chute; 52. Top rod; 521. Sliding rod; 522. Bottom rod; 523. Magnetic ring; 524. Iron ring; 53. First chute; 6. Trigger component; 61. Fixed column; 62. Counterweight; 63. Opening and closing plate; 64. Traction rope; 65. Slide; 66. Support plate; 7. Aperture adjustment component; 71. Baffle; 72. Pull rope; 8. Column. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0033] Example 1, please refer to Figure 1-7 A fully automatic electro-hydraulic servo system based on a test bench comprises a hydraulic system 1, wherein a pulse absorber 2 is arranged on the hydraulic system 1, wherein a buffer component 3 and a plurality of elastic members 4 are arranged inside the pulse absorber 2; wherein the buffer component 3 comprises a sealing plate 31, a first damping plate 32 and a second damping plate 33, wherein a vent hole 34 is provided on the second damping plate 33, and wherein the sealing plate 31 is provided with a resistance during its movement, so as to absorb the periodic pulse pressure of the hydraulic system 1; wherein a damping adjustment component 5 is arranged between the first damping plate 32 and the second damping plate 33, wherein the damping adjustment component 5 comprises a deformable plate 51, wherein the deformable plate 51 has two states, namely, a merged state and a folded state, wherein the position of the first damping plate 32 is locked when the deformable plate 51 is in the merged state; wherein a trigger component 6 is arranged on the sealing plate 31, wherein when the external impact force reaches a set value, the trigger component 6 makes the deformable plate 51 in a folded state, and unlocks the position of the first damping plate 32, so as to extend the buffer path of the sealing plate 31.

[0034] The pulse absorber 2 includes a tank body, the inner wall of which is fixedly connected with a guide plate, and the sealing plate 31 and the first damping plate 32 are provided with limiting grooves, and the sealing plate 31 and the first damping plate 32 slide inside the tank body through the guide plate, and the second damping plate 33 is fixedly connected to the inside of the tank body, and the first damping plate 32 is provided with a ventilation hole, which is larger than the ventilation hole 34.

[0035] Specifically, a plurality of first buffer springs are fixedly connected between the first damping plate 32 and the sealing plate 31 , and a plurality of second buffer springs are fixedly connected between the first damping plate 32 and the second damping plate 33 .

[0036] When pulse pressure occurs, the impact force pushes the sealing plate 31 to move. The sealing plate 31 is subjected to the buffering resistance of the second damping plate 33, and can effectively absorb the external impact kinetic energy. When the impact force is less than the set value, the deformation plate 51 is in a merged state and resists the first damping plate 32. When the external impact force is too large, the deformation plate 51 can be folded by the trigger component 6, so that the sealing plate 31 can continue to move, thereby extending the buffering path.

[0037] In an embodiment further provided by the present invention, the damping adjustment component 5 also includes a pair of push rods 52, a guide hole is opened on the first damping plate 32, and a friction pattern is opened on the inner wall of the guide hole, so that the push rod 52 is suspended on the guide hole through the friction pattern, and the push rod 52 moves in the guide hole. A first inclined groove 53 is opened on the top of the push rod 52, and the deformation plate 51 is driven to fold during the upward movement of the push rod 52.

[0038] The deformable plate 51 includes a first plate body 511 and a second plate body 512 rotatably connected thereto. The first plate body 511 and the second plate body 512 initially conflict with each other. A touch rod 513 is fixedly connected to the side end of the second plate body 512. A second inclined groove 514 is provided at the side end of the touch rod 513. During the movement of the top rod 52, the second plate body 512 is driven to tilt by the touch rod 513.

[0039] Specifically, the top of the first plate body 511 is rotatably connected to the bottom surface of the second damping plate 33 , and the bottom of the second plate body 512 is rotatably connected to the top surface of the first damping plate 32 .

[0040] When the push rod 52 moves upward, the push rod 52 contacts the second inclined groove 514 of the touch rod 513 through the first inclined groove 53, decomposes the force, drives the touch rod 513 to move, and tilts the second plate body 512. Once the second plate body 512 tilts, force is applied to the bottom of the second plate body 512, and the position of the first damping plate 32 becomes loose and is no longer limited. The second plate body 512 will continue to tilt until the first plate body 511 and the second plate body 512 are in a folded relationship.

[0041] In an embodiment further provided by the present invention, the trigger component 6 includes a fixed column 61 fixedly connected to the top surface of the sealing plate 31, the side end of the fixed column 61 is slidably connected to a counterweight block 62, the top of the fixed column 61 is rotatably connected to an opening and closing plate 63, a traction rope 64 is fixedly connected between the counterweight block 62 and the opening and closing plate 63, the opening and closing plate 63 is initially in a closed state, and when the fixed column 61 and the counterweight block 62 are relatively displaced, the opening and closing plate 63 is opened by the traction rope 64.

[0042] A sliding groove 65 is formed at the side end of the fixing column 61 , a reset member is provided between the counterweight block 62 and the sliding groove 65 , and the counterweight block 62 is snap-fitted into the interior of the sliding groove 65 by means of a buckle.

[0043] Specifically, the outside of the fixed column 61 is fixedly connected with a plurality of evenly distributed support plates 66, which are used to strongly support the rotating opening and closing plate 63, and the support plates 66 are arranged at positions just offset from the bottom of the top rod 52, so that they will not conflict with the top rod 52 when moving up and down.

[0044] The counterweight block 62 is initially fixed on the slide groove 65 by a buckle. When the external impact force hits the sealing plate 31, when the impact force is less than the set value, the counterweight block 62 does not move, and the opening and closing plate 63 is in a closed state. When it moves upward with the sealing plate 31, the opening and closing plate 63 will not conflict with the push rod 52; when the impact force is greater than the set value, under the action of inertia, the counterweight block 62 is displaced relative to the fixed column 61, and breaks through the elastic force of the buckle, starts to slide in the slide groove 65, and pulls the opening and closing plate 63 to rotate. After the opening and closing plate 63 rotates, due to its unfolded state, the sealing plate 31 moves upward with the opening and closing plate 63, so that the opening and closing plate 63 can just push the push rod 52 to move upward, thereby completing the purpose of unlocking the first damping plate 32.

[0045] In a solution further provided by the present invention, an aperture adjustment component 7 is provided on the vent hole 34, and the aperture adjustment component 7 includes a baffle 71, and a pull rope 72 is fixedly connected between the baffle 71 and the first plate body 511. When the first plate body 511 rotates, the baffle 71 is driven to move through the pull rope 72, so that the aperture of the vent hole 34 becomes larger.

[0046] When the sealing plate 31 obtains a sufficient buffer path, it is also necessary to reduce the buffer resistance thereto. When the first plate body 511 rotates, the baffle 71 is pulled to move by the pull rope 72, so that the ventilation cross-sectional area of ​​the vent hole 34 increases, the ventilation volume increases, and the resistance to the sealing plate 31 decreases. Since the buffer path is extended and the resistance is appropriately reduced, the internal components of the tank body can be effectively protected while ensuring effective buffering of external impact forces, thereby extending the service life of the internal components of the tank body, and transforming the original "hard" damping into "soft" damping in this case, and ensuring that the buffering effect remains unchanged.

[0047] In the present invention, an elastic rope is fixedly connected between the opening and closing plate 63 and the fixing column 61, and a stop column 8 is fixedly connected to the top of the fixing column 61, which first contacts with the first damping plate 32 to provide support.

[0048] When the impact force is consumed by the air pressure damping, the sealing plate 31 begins to return to its original position, and then under the action of the reset member, the counterweight block 62 also returns to the initial position and is clamped by the clamping block again. Then, under the action of the elastic rope, the opening and closing plate 63 is closed so that the top rod 52 will not be squeezed when the impact force is not large next time.

[0049] Since the push rod 52 is movable and extends to the bottom of the first damping plate 32, when the impact force is too large, the push rod 52 will first contact the opening and closing plate 63, so that the vent hole 34 will be expanded in advance, and then the buffer path can be extended between the sealing plate 31 and the first damping plate 32, and the damping can be adjusted, so as to reduce the stamping damage to the sealing plate 31, the damping plate and other materials caused by external impact.

[0050] Example 2, please refer to Figure 8 The difference between Example 2 and Example 1 is that the following technical features are added: the top rod 52 adopts a telescopic structure, and the top rod 52 includes a sliding rod 521 and a bottom rod 522. The inside of the sliding rod 521 is fixedly connected with a magnetic ring 523, and the outer end of the bottom rod 522 near the top is fixedly connected with an iron ring 524. When the top rod 52 is subjected to a set pressure, it will shrink.

[0051] Specifically, a compression spring is fixedly connected between the top of the bottom rod 522 and the inner top of the sliding rod 521 .

[0052] Initially, under the magnetic force of the magnetic ring 523 and the iron ring 524, the top rod 52 does not shrink, but pushes the touch rod 513 to move until the top rod 52 approaches the second damping plate 33. Under the squeezing of the sealing plate 31, the pressure exceeds the magnetic force of the magnetic ring 523 and the iron ring 524, and then the bottom rod 522 presses the compression spring to shrink the top rod 52, further reducing the minimum distance between the sealing plate 31 and the second damping plate 33, so that the top rod 52 will not hinder the sealing plate 31. The support column reaches the second damping plate 33 first and plays a supporting role between the sealing plate 31 and the second damping plate 33.

[0053] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fully automatic electro-hydraulic servo system for use on a test bench, comprising a hydraulic system (1), wherein a pulse absorber (2) is provided on the hydraulic system (1), and characterized in that: The pulse absorber (2) is provided with a buffer component (3) and a plurality of elastic components (4) inside; The buffer component (3) comprises a sealing plate (31), a first damping plate (32) and a second damping plate (33); the second damping plate (33) is provided with a vent hole (34) for providing resistance to the sealing plate (31) during its movement, so as to absorb the periodic pulse pressure of the hydraulic system (1); A damping adjustment component (5) is arranged between the first damping plate (32) and the second damping plate (33), and the damping adjustment component (5) comprises a deformable plate (51), and the deformable plate (51) has two states: a combined state and a folded state. When the deformable plate (51) is in the combined state, the position of the first damping plate (32) is locked; The sealing plate (31) is provided with a trigger component (6), and when the external impact force reaches a set value, the trigger component (6) causes the deformation plate (51) to be in a folded state, unlocks the position of the first damping plate (32), and extends the buffer path of the sealing plate (31).

2. The fully automatic electro-hydraulic servo system based on the test bench according to claim 1 is characterized in that: The damping adjustment component (5) further comprises a pair of push rods (52), the first damping plate (32) is provided with a guide hole, the push rods (52) are movable in the guide hole, the top of the push rods (52) is provided with a first inclined groove (53), and the push rods (52) drive the deformation plate (51) to fold when moving upward.

3. The fully automatic electro-hydraulic servo system based on the test bench according to claim 2 is characterized in that: The deformable plate (51) comprises a first plate body (511) and a second plate body (512) rotatably connected thereto, the first plate body (511) and the second plate body (512) initially abut against each other, a side end of the second plate body (512) is fixedly connected with a touch rod (513), a side end of the touch rod (513) is provided with a second inclined groove (514), and during the movement of the top rod (52), the second plate body (512) is driven to tilt by the touch rod (513).

4. The fully automatic electro-hydraulic servo system based on the test bench according to claim 3 is characterized in that: The trigger component (6) comprises a fixed column (61) fixedly connected to the top surface of the sealing plate (31); the side end of the fixed column (61) is slidably connected to a counterweight block (62); the top of the fixed column (61) is rotatably connected to an opening and closing plate (63); a traction rope (64) is fixedly connected between the counterweight block (62) and the opening and closing plate (63); the opening and closing plate (63) is initially in a closed state; when the fixed column (61) and the counterweight block (62) are relatively displaced, the opening and closing plate (63) is opened through the traction rope (64).

5. The fully automatic electro-hydraulic servo system based on the test bench according to claim 4 is characterized in that: A sliding groove (65) is provided at the side end of the fixing column (61), a reset piece is provided between the counterweight block (62) and the sliding groove (65), and the counterweight block (62) is snap-fitted to the inside of the sliding groove (65) by means of a buckle.

6. The fully automatic electro-hydraulic servo system based on the test bench according to claim 5 is characterized in that: The vent hole (34) is provided with an aperture adjustment component (7), the aperture adjustment component (7) comprising a baffle (71), a pull rope (72) being fixedly connected between the baffle (71) and the first plate body (511), and when the first plate body (511) rotates, the baffle (71) is driven to move through the pull rope (72), thereby increasing the aperture of the vent hole (34).

7. The fully automatic electro-hydraulic servo system based on the test bench according to claim 6 is characterized in that: An elastic rope is fixedly connected between the opening and closing plate (63) and the fixing column (61), and an abutment column is fixedly connected to the top of the fixing column (61).

8. The fully automatic electro-hydraulic servo system based on the test bench according to claim 7 is characterized in that: The top rod (52) adopts a telescopic structure. The top rod (52) comprises a sliding rod (521) and a bottom rod (522). The inside of the sliding rod (521) is fixedly connected with a magnetic ring (523). The outer end of the bottom rod (522) close to the top is fixedly connected with an iron ring (524). When the top rod (52) is subjected to a set pressure, it will shrink.

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