A full-automatic electro-hydraulic servo system based on a test bench

Abstract

The present application relates to the technical field of hydraulic system, and specifically discloses a full-automatic electro-hydraulic servo system based on a test bench, which comprises a hydraulic system, wherein a pulse absorber is arranged on the hydraulic system, and a buffer component and a plurality of elastic members are arranged in the pulse absorber; the buffer component comprises a sealing plate, a first damping plate and a second damping plate, and a vent hole is formed in the second damping plate. The full-automatic electro-hydraulic servo system based on a test bench provided by the present application is provided with a damping adjusting component, so that when the sealing plate has a sufficient buffer path, the buffer resistance to the sealing plate is reduced; when the first plate body rotates, the rope is pulled to move the baffle, the vent cross-sectional area of the vent hole is increased, the vent amount is increased, and the resistance to the sealing plate is reduced; since the buffer path is prolonged and the resistance is appropriately reduced, the internal devices of the tank body can be effectively protected under the condition that the external impact force can be effectively buffered, so that the service life of the internal devices of the tank body is prolonged.

Description

Technical Field

[0001] This invention relates to the field of hydraulic system technology, and more specifically to a fully automatic electro-hydraulic servo system based on a test bench. Background Technology

[0002] Currently, in the field of automotive parts testing, it is necessary to inspect and test critical automotive components for tensile strength, bending strength, and torsional strength. Workers typically set up a complete electro-hydraulic servo system on a test bench to provide a sufficient and precise power source for these tests. An electro-hydraulic servo system is an automatic control system that combines electrical control and hydraulic drive technology. It controls the movement of hydraulic actuators through electrical signals and is commonly used in applications requiring high torque and force. It mainly consists of a hydraulic system and an electrical control system. Because hydraulic systems can experience periodic pressure pulsations and cavitation during actual operation, a pulse absorber is usually installed in the hydraulic system to absorb hydraulic pulses.

[0003] Existing pulse absorbers contain elastic and damping components, which can not only absorb pulses but also reduce the amplitude and frequency. However, they cannot be configured to provide corresponding buffer resistance for different pulse pressure magnitudes. This results in excessive damping force when the external impact is too large, leading to a large impact force on the internal components. Over time, this will damage the internal damping components and reduce their service life. Summary of the Invention

[0004] The purpose of this invention is to provide a fully automated electro-hydraulic servo system based on a test bench, in order to overcome the above-mentioned shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A fully automatic electro-hydraulic servo system for use on a test bench includes a hydraulic system, on which a pulse absorber is installed, and the pulse absorber is internally equipped with a buffer component and multiple elastic elements;

[0007] The buffer component includes a sealing plate, a first damping plate, and a second damping plate. The second damping plate has a vent hole, which provides 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. The damping adjustment component includes a deformable plate, which has two states: folded and folded. When the deformable plate is in the folded state, the position of the first damping plate is locked.

[0009] The sealing plate is provided with a triggering component. When the external impact force reaches a set value, the triggering component causes the deformation plate to fold and unlocks the position of the first damping plate to extend the buffer path of the sealing plate.

[0010] Furthermore, the damping adjustment component also includes a pair of push rods. The first damping plate has a guide hole, the push rod moves within the guide hole, and the top of the push rod has a first inclined groove. During the upward movement of the push rod, it drives the deformation plate to fold.

[0011] Furthermore, the deformable plate includes a first plate and a second plate rotatably connected thereto. The first plate and the second plate initially abut against each other. A contact rod is fixedly connected to the side end of the second plate. A second inclined groove is opened on the side end of the contact rod. During the movement of the top rod, the second plate is driven to tilt through the contact rod.

[0012] Furthermore, the triggering component includes a fixed column fixedly connected to the top surface of the sealing plate, a counterweight block slidably connected to the side end of the fixed column, an opening and closing plate rotatably connected to the top of the fixed column, and a traction rope 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 sliding groove is provided on the side end of the fixed column, and a reset component is provided between the counterweight and the sliding groove. The counterweight is snapped into the inside of the sliding groove by a buckle.

[0014] Furthermore, the vent hole is provided with a diameter adjustment component, which includes a baffle. A pull rope is fixedly connected between the baffle and the first plate. When the first plate rotates, the baffle is moved by pulling the rope, thereby increasing the diameter of the vent hole.

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

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

[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 up a damping adjustment component, the buffering resistance to the sealing plate is reduced when the sealing plate has a sufficient buffering path. When the first plate rotates, the baffle is moved by the pull rope, which increases the cross-sectional area of ​​the vent and the air volume, thereby reducing the resistance to the sealing plate. Due to the extended buffering path and the appropriate reduction of resistance, the internal components of the tank can be effectively protected while ensuring effective buffering of external impact forces. This extends the service life of the internal components and transforms the pulse absorber from the original "hard" damping to "soft" damping, while maintaining the same buffering effect.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0020] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the overall internal structure provided in an embodiment of the present invention;

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

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

[0025] Figure 4 This is a schematic diagram of the buffer component structure provided in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the trigger component structure provided in an embodiment of the present invention;

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

[0028] Figure 7 This is a schematic diagram of the second damping plate structure from below, provided in an embodiment of the present invention.

[0029] Figure 8 This is a schematic cross-sectional view of the top rod structure provided in Embodiment 2 of the present invention.

[0030] Explanation of reference numerals in the attached figures:

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

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0033] Example 1, please refer to Figure 1-7 A fully automatic electro-hydraulic servo system for use on a test bench includes a hydraulic system 1. A pulse absorber 2 is installed on the hydraulic system 1. The pulse absorber 2 internally includes a buffer component 3 and multiple elastic elements 4. The buffer component 3 includes a sealing plate 31, a first damping plate 32, and a second damping plate 33. The second damping plate 33 has a vent 34, which provides resistance to the sealing plate 31 during its movement to absorb the periodic pulse pressure of the hydraulic system 1. A damping adjustment component 5 is installed between the first damping plate 32 and the second damping plate 33. The damping adjustment component 5 includes a deformable plate 51, which has two states: folded and closed. When the deformable plate 51 is in the folded state, the position of the first damping plate 32 is locked. A trigger component 6 is installed on the sealing plate 31. When the external impact force reaches a set value, the trigger component 6 causes the deformable plate 51 to fold, unlocking the position of the first damping plate 32 and extending the buffer path of the sealing plate 31.

[0034] The pulse absorber 2 includes a tank, with a guide plate fixedly connected to the inner wall of the tank. Limit grooves are provided on the sealing plate 31 and the first damping plate 32. The sealing plate 31 and the first damping plate 32 slide inside the tank through the guide plate. The second damping plate 33 is fixedly connected to the inside of the tank. A ventilation hole is provided on the first damping plate 32, which is larger than the vent 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 buffered by the second damping plate 33, which 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 combined state and resists the first damping plate 32. When the external impact force is too large, the triggering component 6 can cause the deformation plate 51 to fold, so that the sealing plate 31 can continue to move and extend the buffer path.

[0037] In a further embodiment of the present invention, the damping adjustment component 5 further includes a pair of push rods 52. The first damping plate 32 has a guide hole, and the inner wall of the guide hole has friction texture. The push rod 52 is suspended above the guide hole by the friction texture. The push rod 52 moves within the guide hole. The top of the push rod 52 has a first inclined groove 53. During the upward movement of the push rod 52, it drives the deformation plate 51 to fold.

[0038] The deformable plate 51 includes a first plate 511 and a second plate 512 rotatably connected thereto. The first plate 511 and the second plate 512 initially abut against each other. A contact rod 513 is fixedly connected to the side end of the second plate 512. A second inclined groove 514 is opened on the side end of the contact rod 513. During the movement of the top rod 52, the second plate 512 is driven to tilt through the contact rod 513.

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

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

[0041] In a further embodiment of the present invention, the triggering component 6 includes a fixed post 61 fixedly connected to the top surface of the sealing plate 31, a counterweight 62 slidably connected to the side end of the fixed post 61, an opening and closing plate 63 rotatably connected to the top of the fixed post 61, and a traction rope 64 fixedly connected between the counterweight 62 and the opening and closing plate 63. The opening and closing plate 63 is initially closed, and when the fixed post 61 and the counterweight 62 undergo relative displacement, the opening and closing plate 63 is opened by the traction rope 64.

[0042] The side end of the fixed column 61 is provided with a sliding groove 65, and a reset component is provided between the counterweight 62 and the sliding groove 65. The counterweight 62 is snapped into the inside of the sliding groove 65 by a buckle.

[0043] Specifically, the fixed column 61 is externally fixedly connected with multiple evenly distributed support plates 66. The support plates 66 provide strong support for the rotating opening and closing plate 63. The support plates 66 are positioned offset from the bottom of the top rod 52 so that they do not collide with the top rod 52 when moving up and down.

[0044] Initially, the counterweight 62 is fixed to the slide groove 65 by a snap-fit. When an external impact force hits the sealing plate 31, if the impact force is less than the set value, the counterweight 62 remains stationary, 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 collide with the push rod 52. When the impact force is greater than the set value, under the action of inertia, the counterweight 62 is displaced relative to the fixed column 61 and breaks through the elastic force of the snap-fit. It begins 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, carrying the opening and closing plate 63 with it, so that the opening and closing plate 63 can just push the push rod 52 upward, thus completing the purpose of unlocking the first damping plate 32.

[0045] In a further embodiment of the present invention, the vent 34 is provided with a diameter adjustment component 7, the diameter adjustment component 7 includes a baffle 71, and a pull rope 72 is fixedly connected between the baffle 71 and the first plate 511. When the first plate 511 rotates, the baffle 71 is moved by the pull rope 72, thereby increasing the diameter of the vent 34.

[0046] When the sealing plate 31 obtains a sufficient buffer path, it is also necessary to reduce its buffer resistance. When the first plate 511 rotates, the baffle 71 is moved by the pull rope 72, which increases the cross-sectional area of ​​the vent 34 and the air volume, thereby reducing the resistance to the sealing plate 31. By extending the buffer path and appropriately reducing the resistance, the internal components of the tank can be effectively protected while ensuring effective buffering of external impact forces. This extends the service life of the internal components of the tank and transforms the original "hard" damping into "soft" damping, while ensuring that the buffering effect remains unchanged.

[0047] In this invention, an elastic rope is fixedly connected between the opening and closing plate 63 and the fixed column 61, and a stop post 8 is fixedly connected to the top of the fixed column 61. Its function is to first contact the first damping plate 32 to provide support.

[0048] After the impact force is consumed by the air pressure damping, the sealing plate 31 begins to return to its original position. Then, under the action of the reset component, the counterweight 62 also returns to its initial position and is locked by the locking block again. Then, under the action of the elastic rope, the opening and closing plate 63 retracts so that when the next impact force is not large, it will not squeeze the top rod 52.

[0049] Since the push rod 52 extends through 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, thereby expanding the vent 34 in advance. This will extend the buffer path between the sealing plate 31 and the first damping plate 32 and adjust the damping, thereby reducing the impact damage to the sealing plate 31, damping plate and other materials caused by external impact.

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

[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 push rod 52 does not retract, but pushes the contact rod 513 to move until the push rod 52 approaches the second damping plate 33. Under the pressure of the sealing plate 31, the pressure exceeds the magnetic force of the magnetic ring 523 and the iron ring 524. Then, the bottom rod 522 presses the compression spring, causing the push rod 52 to retract, further reducing the minimum distance between the sealing plate 31 and the second damping plate 33, so that the push rod 52 will not obstruct the sealing plate 31. The contact rod 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 foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, 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 foregoing 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), characterized in that: The pulse absorber (2) is internally provided with a buffer component (3) and multiple elastic components (4); The buffer component (3) includes a sealing plate (31), a first damping plate (32), and a second damping plate (33). The second damping plate (33) has a vent hole (34) which provides resistance to the sealing plate (31) during its movement to absorb the periodic pulse pressure of the hydraulic system (1). A damping adjustment component (5) is provided between the first damping plate (32) and the second damping plate (33). The damping adjustment component (5) includes a deformable plate (51). The deformable plate (51) has two states: folded and folded. When the deformable plate (51) is in the folded state, the position of the first damping plate (32) is locked. The damping adjustment component (5) also includes a pair of push rods (52). The first damping plate (32) has a guide hole. The push rod (52) moves within the guide hole. The top of the push rod (52) has a first inclined groove (53). The push rod (52) drives the deformation plate (51) to fold during the upward movement. The sealing plate (31) is provided with a triggering component (6). When the external impact force reaches a set value, the triggering component (6) causes the deformation plate (51) to fold and unlocks the position of the first damping plate (32) to extend the buffer path of the sealing plate (31).

2. The fully automated electro-hydraulic servo system based on a test bench according to claim 1, characterized in that, The deformable plate (51) includes a first plate (511) and a second plate (512) rotatably connected thereto. The first plate (511) and the second plate (512) initially abut against each other. A contact rod (513) is fixedly connected to the side end of the second plate (512). A second inclined groove (514) is opened on the side end of the contact rod (513). During the movement of the top rod (52), the second plate (512) is driven to tilt through the contact rod (513).

3. The fully automated electro-hydraulic servo system based on a test bench according to claim 2, characterized in that, The triggering component (6) includes a fixed column (61) fixedly connected to the top surface of the sealing plate (31). A counterweight (62) is slidably connected to the side end of the fixed column (61). An opening and closing plate (63) is rotatably connected to the top of the fixed column (61). A traction rope (64) is fixedly connected between the counterweight (62) and the opening and closing plate (63). The opening and closing plate (63) is initially closed. When the fixed column (61) and the counterweight (62) undergo relative displacement, the opening and closing plate (63) is opened by the traction rope (64).

4. The fully automated electro-hydraulic servo system based on a test bench according to claim 3, characterized in that, The side end of the fixed column (61) is provided with a sliding groove (65), and a reset component is provided between the counterweight (62) and the sliding groove (65). The counterweight (62) is snapped into the inside of the sliding groove (65) by a buckle.

5. The fully automated electro-hydraulic servo system based on a test bench according to claim 4, characterized in that, The ventilation hole (34) is provided with a diameter adjustment component (7). The diameter adjustment component (7) includes a baffle (71). A pull rope (72) is fixedly connected between the baffle (71) and the first plate (511). When the first plate (511) rotates, the baffle (71) is driven to move by the pull rope (72), so that the diameter of the ventilation hole (34) becomes larger.

6. The fully automated electro-hydraulic servo system based on a test bench according to claim 5, characterized in that, An elastic rope is fixedly connected between the opening and closing plate (63) and the fixed post (61), and an abutment is fixedly connected to the top of the fixed post (61).

7. The fully automated electro-hydraulic servo system based on a test bench according to claim 6, characterized in that, The top rod (52) adopts a telescopic structure. The top rod (52) includes a sliding rod (521) and a bottom rod (522). A magnetic ring (523) is fixedly connected inside the sliding rod (521). An iron ring (524) is fixedly connected to the outer end of the bottom rod (522) near the top. When the top rod (52) is subjected to a set pressure, it will retract.

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