An anti-out-of-plane torsion force transmission system for auxiliary loading of MTS hydraulic servo actuators

Abstract

This invention discloses an anti-out-of-plane torsion force transmission system for assisting the loading of an MTS hydraulic servo actuator, comprising a lower end plate, a U-shaped support frame, eight bearings, six connecting plates, twelve adjustable screws, several nuts, two sliding devices, and several stiffening plates. This invention adjusts the spatial position of the rotatable round steel tubes in the eight bearings using the screws, thereby forming a rectangular channel capable of clamping MTS hydraulic servo actuators of different specifications. This restricts out-of-plane torsion without affecting the single-axis reciprocating loading of the MTS hydraulic servo actuator, effectively avoiding friction between the loading head and the anti-out-of-plane torsion force transmission system, and reducing experimental errors.

Description

Technical Field

[0001] This invention relates to an anti-torsion system, and more particularly to an anti-out-of-plane torsional force transmission system that assists in loading an MTS hydraulic servo actuator. Background Technology

[0002] To study the impact of earthquakes on structural components or the structure itself, researchers often conduct numerous low-cycle reciprocating cyclic loading tests using MTS loading devices. Traditional MTS hydraulic servo actuators exhibit initial out-of-plane torsion and subsequent out-of-plane torsion during loading. If left uncontrolled, this will generate additional torque that affects the test results. If "forced fixation" control is used for loading, the MTS hydraulic servo actuator will experience slight vibrations due to friction during loading, leading to uneven loading force and displacement, which will also cause test errors. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the above-mentioned technical problems and provide an anti-out-of-plane torsion force transmission system for assisting the loading of MTS hydraulic servo actuators. This system can limit out-of-plane torsion without affecting the single-axis reciprocating loading of the MTS actuators, and can effectively avoid friction between the loading head and the anti-out-of-plane torsion force transmission system, thereby reducing the error generated in the test.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] An anti-out-of-plane torsion force transmission system for assisting MTS hydraulic servo actuator loading includes a lower end plate, a U-shaped support frame, a first rolling support frame, a second rolling support frame, and a third rolling support frame;

[0006] The lower end plate is fixed to the bottom of the two side plates of the U-shaped support frame;

[0007] The first rolling support frame, the second rolling support frame, and the third rolling support frame are all U-shaped structures. The bottom part of the U-shaped structure uses two bearings, which are rotatably connected to the side of the U-shaped structure. The side end of the U-shaped structure is provided with a screw.

[0008] A first bearing and a second bearing are arranged side by side between the bottom of the two side plates of the U-shaped support frame. The two ends of the first bearing and the second bearing are rotatably connected to the two side plates of the U-shaped support frame.

[0009] The screw of the first rolling support frame passes through the bottom edge of the U-shaped support frame, and nuts are connected to the screw on both the upper and lower sides of the bottom edge of the U-shaped support frame.

[0010] The second and third rolling support frames are arranged with their bottom edges facing each other and symmetrical about the U-shaped support frame. The sides of the second and third rolling support frames are arranged in an up-down configuration. The upper ends of the bearings of the second and third rolling support frames pass between the two bearings on the first rolling support frame, and the lower ends of the bearings of the second and third rolling support frames extend to the bottom of the first and second bearings.

[0011] The upper and lower screws of the second rolling support frame pass vertically through one side of the U-shaped support frame, and the upper and lower screws of the third rolling support frame pass vertically through the other side of the U-shaped support frame. Each screw is connected to a nut on both sides of the side of the U-shaped support frame.

[0012] The bearings on the first, second, and third rolling support frames, along with the first and second bearings, form a rectangular channel through which the MTS hydraulic servo actuator passes.

[0013] Preferably, the sides of the first rolling support frame, the second rolling support frame, and the third rolling support frame are all connected by connecting plates. The bearings are vertically rotatably connected to the connecting plates. Both ends of the connecting plates are connected by screws. The screws at both ends of the connecting plates are parallel. The two screws on the upper side of the second rolling support frame and the third rolling support frame pass through the two screws connected to the same connecting plate on the first rolling support frame.

[0014] Preferably, the first bearing, the second bearing, and the bearing have the same structure, each including a shaft wheel and a round steel tube. The round steel tube is equipped with shaft wheels at both ends, and the round steel tube is rotatably connected to the connecting plate through the shaft wheels.

[0015] Preferably, the two ends of the connecting plate are provided with semi-circular grooves that match the shape of the shaft wheel, and the shaft wheel is fixedly installed in the semi-circular grooves.

[0016] Preferably, both side plates of the U-shaped support frame are provided with circular holes for the shaft wheels of the first bearing and the second bearing to be inserted, and the shaft wheels of the first bearing and the second bearing are installed in the circular holes.

[0017] Preferably, the screws on the first rolling support frame, the second rolling support frame, and the third rolling support frame are perpendicular to the bearing.

[0018] Preferably, the lower side plates of the second and third rolling support frames are each equipped with a sliding device on the side near the lower end plate. The sliding device is in contact with the lower end plate and can slide on the lower end plate. The sliding direction is perpendicular to the side plate of the U-shaped support frame.

[0019] Preferably, the sliding device includes a support plate and a roller. The support plate is fixedly connected to the lower side plates of the second and third rolling support frames. The roller is mounted on the support plate and contacts the lower end plate. The roller's axle is parallel to the side plate of the U-shaped support frame.

[0020] Preferably, the lower end plate is provided with four screw holes for easy installation.

[0021] Preferably, the outer side of the side plate of the U-shaped support frame is provided with crisscrossing stiffening plates.

[0022] This invention has the following significant advantages:

[0023] The anti-out-of-plane torsion force transmission system for MTS hydraulic servo actuator loading, as described in this invention, is simple in construction, inexpensive, and easy to install. This system can form a rectangular channel of varying sizes, limiting the out-of-plane torsion of MTS hydraulic servo actuators of different specifications during test loading. It is universally applicable and reusable. Specifically, the size of the rectangular channel can be adjusted by adjusting the screws and nuts on the first, second, and third rolling support frames. Furthermore, the bearings in this invention ensure rolling contact between the MTS hydraulic servo actuator and the bearings. Therefore, this invention effectively avoids friction between the MTS hydraulic servo actuator and the anti-out-of-plane torsion force transmission system without affecting the single-axis reciprocating test loading of the MTS hydraulic servo actuator, significantly reducing the error generated during the single-axis reciprocating loading test of the MTS hydraulic servo actuator. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the anti-out-of-plane torsion force transmission system for the MTS hydraulic servo actuator loading of the present invention.

[0025] Figure 2 This is a front view of the anti-out-of-plane torsion force transmission system for the MTS hydraulic servo actuator loading of the present invention.

[0026] Figure 3 This is an exploded view of the anti-out-of-plane torsion force transmission system for the MTS hydraulic servo actuator loading of the present invention.

[0027] Figure 4 This is an internal schematic diagram of the anti-out-of-plane torsion force transmission system for the MTS hydraulic servo actuator loading of the present invention.

[0028] Figure 5 This is a schematic diagram showing the disassembly of the bearing of the present invention and its connection with surrounding components.

[0029] Figure 6 This is a schematic diagram of the sliding device of the present invention.

[0030] Figure 7 This is a detailed view of the connection between the screw and the U-shaped support frame of the present invention.

[0031] Figure 8 This is a schematic diagram of the installation of the present invention on the MTS hydraulic servo actuator.

[0032] Figure 9 This is a detailed schematic diagram of the installation of the present invention in the MTS hydraulic servo actuator.

[0033] In the diagram: 1-Lower end plate, 2-U-shaped support frame, 3-Bearing, 4-Connecting plate, 5-Screw, 6-Nut, 7-Sliding device, 8-Washer, 9-Hardening plate, 10-MTS hydraulic servo actuator, 11-Anti-out-of-plane torsion force transmission system loaded by auxiliary MTS hydraulic servo actuator, 31-First bearing, 32-Second bearing, 33-Third bearing, 34-Fourth bearing, 35-Fifth bearing, 36-Sixth bearing, 37-Seventh bearing, 38-Eighth bearing, 301-Shaft wheel, 302-Round steel pipe, 3011-Inner wheel, 3012-Steel ball, 301 3-Outer wheel, 3014-Lubricating oil, 41-First connecting plate, 42-Second connecting plate, 43-Third connecting plate, 44-Fourth connecting plate, 45-Fifth connecting plate, 46-Sixth connecting plate, 501-First screw, 502-Second screw, 503-Third screw, 504-Fourth screw, 505-Fifth screw, 506-Sixth screw, 507-Seventh screw, 508-Eighth screw, 509-Ninth screw, 510-Tenth screw, 511-Eleventh screw, 512-Twelfth screw, 71-Support plate, 72-Roller, 73-Roller. Detailed Implementation

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] The accompanying drawings show schematic diagrams of structures according to embodiments disclosed in this invention. These drawings are not perfectly to scale; some details have been enlarged for clarity, and some details may have been omitted. In real-world applications, the system may deviate from its intended form due to manufacturing tolerances or technical limitations.

[0036] Please see Figures 1 to 4 The anti-out-of-plane torsion force transmission system for the MTS hydraulic servo actuator loading of the present invention includes: a lower end plate 1, a U-shaped support frame 2, eight bearings 3, six connecting plates with semi-circular ends 4, twelve screws 5, several nuts 6, and two sliding devices 7.

[0037] The bottom of the lower end plate 1 is fixed to the bottom of the two side plates of the U-shaped support frame 2.

[0038] Eight bearings are arranged in parallel pairs inside the system. Figure 2 For example, refer to the directions shown below. Figure 1 , Figure 3 and Figure 4 The first bearing 31 and the second bearing 32 are horizontally arranged in the lower part of the inner cavity of the U-shaped support frame 2, with their outermost ends fixed to the circular holes on the side plates of the U-shaped support frame 2. The third bearing 33 and the fourth bearing 34 are vertically arranged in the left side of the inner cavity of the U-shaped support frame 2, with their upper ends fixed to each other by the first connecting plate 41 and the second connecting plate 42. The fifth bearing 35 and the sixth bearing 36 are vertically arranged in the right side of the inner cavity of the U-shaped support frame 2, with their upper ends fixed to each other by the third connecting plate 43. The lower end of the sixth bearing 36 is fixed to the front and rear of the bearing by the fourth connecting plate 44; the seventh bearing 37 and the eighth bearing 38 are arranged sequentially front and rear and horizontally in the upper part of the inner cavity of the U-shaped support frame 2, located below the bottom edge of the U-shaped support frame 2. The seventh bearing 37 is located in front of the third bearing 33 and the fifth bearing 35, and the eighth bearing 38 is located behind the fourth bearing 34 and the sixth bearing 36. The left ends of the seventh bearing 37 and the eighth bearing 38 are fixed to the front and rear of the bearing by the fifth connecting plate 45, and the right ends of the seventh bearing 37 and the eighth bearing 38 are fixed to the front and rear of the bearing by the sixth connecting plate 46; the overall front and rear positions are as follows: first bearing 31 and seventh bearing 37, third bearing 33 and fifth bearing 35, fourth bearing 34 and sixth bearing 36, second bearing 32 and eighth bearing 38.

[0039] Each connecting plate 4 is connected to two parallel and symmetrical screws 5. Each screw 5 is perpendicular to the plane containing the axes of the two bearings 3 connected to the connecting plate 4. The screws connected to the fifth connecting plate 45 and the sixth connecting plate 46 are perpendicular to the bottom edge of the U-shaped support frame 2. The screws connected to the first connecting plate 41 and the second connecting plate 42 are perpendicular to the left side of the U-shaped support frame 2. The screws connected to the third connecting plate 43 and the fourth connecting plate 44 are perpendicular to the right side of the U-shaped support frame 2. Each screw is fitted with a nut and a washer. The screws connected to the fifth connecting plate 45 and the sixth connecting plate 46 are perpendicular to the U-shaped support frame 2. Nuts are provided on the upper and lower sides of the bottom edge of the support frame 2, which allows the vertical position of the seventh bearing 37 and the eighth bearing 38 to be adjusted and fixed in the predetermined position after adjustment. Nuts are provided on both sides of the left side of the U-shaped support frame 2 on the screws connected to the first connecting plate 41 and the second connecting plate 42, and nuts are provided on both sides of the right side of the U-shaped support frame 2 on the screws connected to the third connecting plate 43 and the fourth connecting plate 44. Similarly, the above structure allows the position of the third bearing 33 and the fourth bearing 34 to be adjusted left and right and fixed in the preset position, and the position of the fifth bearing 35 and the sixth bearing 36 to be adjusted left and right and fixed in the preset position.

[0040] Among them, the seventh bearing 37, the eighth bearing 38, the fifth connecting plate 45, the sixth connecting plate 46, and the screws connected to the fifth connecting plate 45 and the sixth connecting plate 46 constitute the first rolling support frame, and the seventh bearing 37 and the eighth bearing 38 serve as rolling parts.

[0041] The third bearing 33, the fourth bearing 34, the first connecting plate 41, the second connecting plate 42, and the screw connecting the first connecting plate 41 and the second connecting plate 42 constitute the second rolling support frame, and the third bearing 33 and the fourth bearing 34 serve as rolling parts.

[0042] The fifth bearing 35, the sixth bearing 36, the fourth connecting plate 44, the third connecting plate 43, and the screws connected to the third connecting plate 43 and the fourth connecting plate 44 constitute the third rolling support frame, with the fifth bearing 35 and the sixth bearing 36 serving as rolling parts.

[0043] The two sliding devices 7 are fixed to the middle of the second connecting plate 42 and the middle of the fourth connecting plate 44 respectively, and the sliding direction is left and right.

[0044] by Figure 2 Taking the orientation shown as an example, the direction perpendicular to the paper is the front-back direction, the left and right sides are the left-right direction, and the top and bottom sides are the top-bottom direction. The anti-out-of-plane torsion force transmission system of the present invention, which assists the MTS hydraulic servo actuator in loading, has a symmetrical structure in the left-right direction.

[0045] The lower end plate 1 is provided with four screw holes for easy installation.

[0046] The left and right side plates of the U-shaped support frame 2 are provided with eight screw holes for the first to eighth screws 501 to 508 to pass through and four circular holes for fixing the first bearing 31 and the second bearing 32. At the same time, the left and right side plates of the U-shaped support frame 2 are fixed with crisscrossing stiffening plates 9, and the top plate of the U-shaped support frame 2 is provided with four screw holes for the ninth to twelfth screws 509 to 512 to pass through.

[0047] Please see Figure 5 The bearing 3 includes two axle wheels 301 and a round steel tube 302. The axle wheel 301 includes an inner wheel 3011, a steel ball 3012, and an outer wheel 3013, which are installed in sequence from the inside to the outside. The steel ball 3012 is provided with lubricating oil 3014, and the two ends of the round steel tube 302 are fixed to the inner wheel 3011 of the two axle wheels 301.

[0048] The components mentioned above are fixed to the outermost ends of the bearing 3, specifically to the outer wheels 3013 of the two shaft wheels 301 in the bearing 3.

[0049] The connecting plate 4 is a rectangular plate with semi-circular ends, used to fix the outer wheel 3013 of the two shaft wheels 301 in the bearing 3.

[0050] Please see Figure 6 The sliding device 7 includes two support plates 71, two rollers 72, and two rollers 73. The rotatable rollers 73 are mounted on the rollers 72 connected to the support plates 71.

[0051] Please see Figure 7 When the screw 5 is connected to the nut 6, a corresponding washer 8 is provided.

[0052] Please see Figure 8 and Figure 9 The specific construction process of this invention is as follows:

[0053] The system of the present invention is installed using high-strength bolts through the screw holes reserved in the lower end plate 1. Then, according to the actual size of the MTS hydraulic servo actuator, the length of the internal screw 5 of the system of the present invention is controlled by adjusting the nut 6 to form a rectangular channel of the round steel tube 302 of the corresponding size. Finally, the MTS hydraulic servo actuator is clamped by adjusting the nut 6.

[0054] Working principle:

[0055] This invention controls the length of the internal screw 5 of the system by adjusting the nut 6, which can first form and then fix a rectangular channel of different sizes composed of eight round steel pipes 302. This can accommodate MTS hydraulic servo actuators of different specifications and limit their out-of-plane torsion during the test loading process. At the same time, since all eight round steel pipes 302 are fixed on the inner wheel 3011 of the shaft wheel 301, while other components fixed to the bearing 3 are fixed on the outer wheel 3013 of the shaft wheel 301, the rotation of the eight round steel pipes 302 is guaranteed. This allows the MTS hydraulic servo actuator to be transmitted when it is performing single-axis reciprocating loading. There can be gaps or contact between the eight round steel pipes 302 and the MTS hydraulic servo actuator.

[0056] This invention has a simple structure, low cost, and convenient construction. The system can form a rectangular channel of different sizes to restrict the out-of-plane torsion of MTS hydraulic servo actuators of different specifications during the test loading process. It has universal applicability and reusability.

[0057] This invention can effectively avoid friction between the MTS hydraulic servo actuator and the anti-out-of-plane torsion force transmission system without affecting the single-axis reciprocating loading of the MTS hydraulic servo actuator, and can greatly reduce the error generated by the single-axis reciprocating loading test of the MTS hydraulic servo actuator.

[0058] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the present invention.

Claims

1. A force transmission system for preventing out-of-plane torsion by assisting the loading of an MTS hydraulic servo actuator, characterized in that, Includes a lower end plate (1), a U-shaped support frame (2), a first rolling support frame, a second rolling support frame, and a third rolling support frame; The bottom end plate (1) is fixed to the bottom of the two side plates of the U-shaped support frame (2); The first rolling support frame, the second rolling support frame and the third rolling support frame are all U-shaped structures. The bottom part of the U-shaped structure uses two bearings (3). The two bearings (3) are rotatably connected to the side of the U-shaped structure. The side end of the U-shaped structure is provided with a screw (5). A first bearing (31) and a second bearing (32) are arranged side by side between the bottom of the two side plates of the U-shaped support frame (2). The two ends of the first bearing (31) and the second bearing (32) are rotatably connected to the two side plates of the U-shaped support frame (2). The screw (5) of the first rolling support frame passes through the bottom edge of the U-shaped support frame (2), and nuts (6) are connected to both the upper and lower sides of the bottom edge of the U-shaped support frame (2) on the screw (5). The bottom edges of the second and third rolling support frames are opposite each other and are symmetrically arranged about the U-shaped support frame (2). The sides of the second and third rolling support frames are arranged in an up-down manner. The upper ends of the bearings (3) of the second and third rolling support frames pass through the two bearings on the first rolling support frame. The lower ends of the bearings (3) of the second and third rolling support frames extend to the bottom of the first bearing (31) and the second bearing (32). The screws (5) at the upper and lower ends of the second rolling support frame pass vertically through the side of one side of the U-shaped support frame (2), and the screws (5) at the upper and lower ends of the third rolling support frame pass vertically through the side of the other side of the U-shaped support frame (2). Each screw (5) is connected to a nut (6) on both sides of the side of the U-shaped support frame (2). The bearings (3) on the first rolling support frame, the second rolling support frame and the third rolling support frame, as well as the first bearing (31) and the second bearing (32), form a rectangular channel through which the MTS hydraulic servo actuator passes. The sides of the first rolling support frame, the second rolling support frame and the third rolling support frame are all connected by connecting plates (4). The bearing (3) is vertically rotatably connected to the connecting plate (4). Both ends of the connecting plate (4) are connected by screws (5). The screws (5) at both ends of the connecting plate (4) are parallel. The two screws (5) on the upper side of the second rolling support frame and the third rolling support frame pass through the two screws (5) connected to the same connecting plate (4) on the first rolling support frame. The first bearing (31), the second bearing (32) and the bearing (3) have the same structure, each including a shaft wheel (301) and a round steel tube (302). The two ends of the round steel tube (302) are equipped with shaft wheels (301), and the round steel tube (302) and the connecting plate (4) are rotatably connected by the shaft wheels (301). The connecting plate (4) has semi-circular grooves at both ends that match the shape of the shaft wheel (301), and the shaft wheel (301) is fixedly installed in the semi-circular grooves.

2. The anti-out-of-plane torsion force transmission system for auxiliary MTS hydraulic servo actuator loading according to claim 1, characterized in that, The two side plates of the U-shaped support frame (2) are provided with round holes for the shaft wheels (301) of the first bearing (31) and the second bearing (32) to be inserted. The shaft wheels (301) of the first bearing (31) and the second bearing (32) are installed in the round holes.

3. The anti-out-of-plane torsion force transmission system for auxiliary MTS hydraulic servo actuator loading according to claim 1, characterized in that, The screws (5) on the first, second, and third rolling support frames are perpendicular to the bearings (3).

4. The anti-out-of-plane torsion force transmission system for auxiliary MTS hydraulic servo actuator loading according to claim 1, characterized in that, The second and third rolling support frames are each equipped with a sliding device (7) on the side of the lower end plate (1). The sliding device (7) is in contact with the lower end plate (1) and can slide on the lower end plate (1). The sliding direction is perpendicular to the side plate of the U-shaped support frame (2).

5. The anti-out-of-plane torsion force transmission system for auxiliary MTS hydraulic servo actuator loading according to claim 4, characterized in that, The sliding device (7) includes a support plate (71) and a roller (73). The support plate (71) is fixedly connected to the lower side plate of the second rolling support frame and the third rolling support frame. The roller (73) is installed on the support plate (71) and is in contact with the lower end plate (1). The roller (72) of the roller (73) is parallel to the side plate of the U-shaped support frame (2).

6. The anti-out-of-plane torsion force transmission system for auxiliary MTS hydraulic servo actuator loading according to claim 1, characterized in that, The lower end plate (1) is provided with four screw holes for easy installation.

7. The anti-out-of-plane torsion force transmission system for auxiliary MTS hydraulic servo actuator loading according to claim 1, characterized in that, The side plate of the U-shaped support frame (2) is provided with crisscrossing stiffening plates (9).

Images