Connecting rod type anti-overturning device

Abstract

The utility model discloses a connecting rod type anti-overturning device which comprises two arc motion connecting rod mechanisms and a vertical displacement limiting unit, the two arc motion connecting rod mechanisms are orthogonally and inversely arranged in the vertical direction, and the vertical displacement limiting unit is connected between the two arc motion connecting rod mechanisms. When one end of the connecting rod type anti-overturning device is fixed, the other end of the connecting rod type anti-overturning device does approximate spherical surface or horizontal surface movement; a vertical displacement limiting value is preset for the vertical displacement limiting unit, and when the vertical displacement limiting unit extends to reach the vertical displacement limiting value, the vertical displacement limiting unit begins to bear and transmit tensile force. The shock insulation support can adapt to natural deformation of various friction pendulum supports, sliding plate supports, rubber supports and other shock insulation supports, the anti-overturning capacity is provided for a shock insulation layer under the condition that the horizontal shock insulation performance of the supports is not affected, the structure is simple, and manufacturing is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering, and particularly relates to a connecting rod type anti-overturning device. Background Technique

[0002] Base isolation technology effectively reduces the input of seismic energy into a building structure by arranging isolation bearings at the bottom of each column at the bottom layer of the building structure, thereby protecting the safety of the building structure and its internal equipment. Its application in the seismic resistance field of ordinary building structures has been relatively mature.

[0003] With the development of high-rise buildings, more and more high-rise buildings have the need for isolation. Under the action of earthquake, due to the action of overturning moment, tensile forces are likely to appear in the edge column members at the bottom of high-rise buildings. Conventional isolation bearings have poor tensile resistance and are difficult to bear the tensile forces generated by building overturning. After being damaged by tension, it will have an extremely adverse impact on the building, and even lead to the complete overturning of the building. Although the existing related technologies can improve the tensile strength of the bearing, they either cannot adapt to the natural vertical deformation brought about by the horizontal deformation of the bearing, or will significantly increase the horizontal restoring force of the isolation bearing, seriously affecting the horizontal isolation performance of the isolation layer and significantly reducing the seismic performance of the building, with poor applicability. Content of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a connecting rod type anti-overturning device, which can adapt to the natural deformation of various isolation bearings such as friction pendulum bearings, sliding plate bearings, and rubber bearings, and provide anti-overturning ability for the isolation layer without affecting the horizontal isolation performance of the bearing.

[0005] The connecting rod type anti-overturning device according to the embodiment of the utility model is used to be installed in the isolation layer of an isolated building, and includes two arc motion connecting rod mechanisms and a vertical displacement limiting unit. The two arc motion connecting rod mechanisms are arranged orthogonally and inversely in the up-and-down direction. The vertical displacement limiting unit is connected between the two arc motion connecting rod mechanisms, so that when one end of the connecting rod type anti-overturning device is fixed, the other end of the connecting rod type anti-overturning device makes an approximate spherical or horizontal plane motion; the vertical displacement limiting unit is preset with a vertical displacement limit value. When the elongation of the vertical displacement limiting unit reaches the vertical displacement limit value, the vertical displacement limiting unit begins to bear and transmit tensile force.

[0006] The link - type anti - overturning device in the embodiment of the present utility model is usually installed in the isolation layer, i.e., the isolation bearing, of a high aspect - ratio isolated building. The specific installation position is near the isolation bearing at the building corner point, between the top layer and the bottom layer of the isolation bearing. During installation, the two arc - shaped motion link mechanisms of the link - type anti - overturning device are fixed in the top layer and the bottom layer of the building isolation layer by means of pre - embedding, post - anchoring, welding, etc., so as to fix the two arc - shaped motion link mechanisms to the top layer and the bottom layer of the isolation bearing. On the one hand, since the two arc - shaped motion link mechanisms are arranged orthogonally and inversely in the vertical direction, when one end of the link - type anti - overturning device is fixed, the other end of the link - type anti - overturning device can perform an approximate spherical or horizontal plane motion, enabling the link - type anti - overturning device to perform synchronous horizontal and vertical motions with the isolation bearing. Therefore, the three - dimensional motion of the link - type anti - overturning device in the embodiment of the present utility model can adapt to the natural deformation of various isolation bearings such as friction pendulum bearings, sliding plate bearings, and rubber bearings, avoiding affecting the isolation performance of the isolation bearing and significantly improving the seismic performance of the building with good applicability. On the other hand, since the vertical displacement limiting unit is connected between the two arc - shaped motion link mechanisms to limit the vertical distance between the two arc - shaped motion link mechanisms, when the vertical displacement limiting unit reaches the vertical displacement limit value, the vertical displacement limiting unit begins to bear and transmit tension. In this way, the maximum vertical elongation displacement of the vertical displacement limiting unit can be preset according to the tensile limit value of the building isolation layer about to overturn. When the vertical elongation displacement of the vertical displacement limiting unit reaches the vertical displacement limit value, the vertical displacement limiting unit begins to bear and transmit tension, avoiding a large - scale lift of the local part of the building isolation bearing, realizing the anti - uplift protection function of the isolation bearing and at the same time avoiding the overturning of the isolated building.

[0007] In summary, the link-type anti-overturning device of the embodiment of the present utility model has the following advantages: First, it can cooperate with various types of isolation bearings to move, protecting the isolation bearings from tensile failure while avoiding affecting the horizontal isolation performance of the isolation bearings; Second, the force transmission path is clear, the anti-pulling force is large, and the isolation building can be prevented from overturning, which is applicable to the isolation of high-rise buildings with a large height-width ratio. In some embodiments, each of the arc motion link mechanisms includes a movable diamond frame, side link rods, a central link rod, and a fixed end connected by hinge means. The fixed end includes an end body and a protrusion located inside the end body. The end body is used to be fixed to the isolation layer. The end body has two first connection points on both sides of the protrusion. The protrusion has a second connection point. Each angle of a set of diagonals of the movable diamond frame is connected to the two first connection points through the side link rods. One angle of the other set of diagonals of the movable diamond frame is connected to the second connection point through the central link rod. The other angle of the other set of diagonals of the movable diamond frame is connected to the vertical displacement limiting unit. The movement trajectory of the other angle of the other set of diagonals of the movable diamond frame is in an arc shape or a straight line shape;

[0008] Among the two arc motion link mechanisms, the directions of all hinge axes of one of the arc motion link mechanisms are in the first direction, and the directions of all hinge axes of the other arc motion link mechanism are in the second direction, and the second direction is perpendicular to the first direction.

[0009] In some embodiments, the movable diamond frame is formed by sequentially hinging four end link rods with the same length at the head and tail.

[0010] In some embodiments, for each of the arc motion link mechanisms, taking the movement plane of the other angle of the other set of diagonals of the movable diamond frame as the projection plane, the projected lengths of all the side link rods on the projection plane are the same.

[0011] In some embodiments, for each of the arc motion link mechanisms, when the projected length of the central link rod on the projection plane is not equal to the projected length of the line connecting the second connection point and the first connection point on the projection plane, the movement trajectory of the other angle of the other set of diagonals of the movable diamond frame is in an arc shape; when the projected length of the central link rod on the projection plane is equal to the projected length of the line connecting the second connection point and the first connection point on the projection plane, the movement trajectory of the other angle of the other set of diagonals of the movable diamond frame is in a straight line shape.

[0012] In some embodiments, the end body has a cross-shaped structure, the two first connection points are located on a set of two opposite extending portions of the cross-shaped structure, the protruding portion is located on the other set of two opposite extending portions of the cross-shaped structure, and the line connecting the second connection point and the intersection center point of the cross-shaped structure is perpendicular to the cross-shaped structure.

[0013] In some embodiments, the vertical displacement limiting unit includes two connecting end plates and at least one load-bearing rod. The two connecting end plates are arranged oppositely, the outer sides of the two connecting end plates are respectively hinged to the other corner of the other set of diagonals of the corresponding movable diamond frame, at least one load-bearing rod slidably passes through the two connecting end plates, and stoppers are provided at both ends of at least one load-bearing rod, and the stoppers are located outside the corresponding connecting end portions.

[0014] In some embodiments, the load-bearing rod is a screw rod, the stopper is a nut, and the nut is in threaded cooperation with the screw rod.

[0015] In some embodiments, the positions of the nuts at both ends of each screw rod are adjustable.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0017] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0018] Figure 1 is a schematic structural diagram of the link-type anti-overturning device of the present utility model;

[0019] Figure 2 is a schematic structural diagram of the arc motion link mechanism of the link-type anti-overturning device of the present utility model;

[0020] Figure 3 is a schematic structural diagram of the vertical displacement limiting unit of the link-type anti-overturning device of the present utility model;

[0021] Figure 4 is a schematic diagram of a state after the link-type anti-overturning device of the present utility model is moved;

[0022] Figure 5 is a schematic diagram of the installation method of the link-type anti-overturning device of the present utility model;

[0023] Figure 6 is a schematic diagram of a planar abstract model of the arc motion link mechanism of the link-type anti-overturning device of the present utility model.

[0024] Reference Signs:

[0025] Link-type anti-overturning device 1000; circular arc motion link mechanism 1; movable diamond frame 11; side link 12; central link 13; fixed end 14; end body 141; first connection point 1411; protrusion 142; second connection point 1421; vertical displacement limiting unit 2; connecting end plate 21; load-bearing rod 22; stopper 23; seismic isolation bearing 3. Detailed Implementation Manner

[0026] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0027] The following will be combined with Figures 1 to 6 to describe the link-type anti-overturning device 1000 of the embodiments of the present invention.

[0028] As Figures 1 to 5 shown, the link-type anti-overturning device 1000 according to the embodiments of the present invention is used to be installed in the seismic isolation layer of a seismic isolation building, and includes two circular arc motion link mechanisms 1 and a vertical displacement limiting unit 2. Among them, the two circular arc motion link mechanisms 1 are arranged orthogonally and inverted in the up-down direction, and the movement trajectories of the movable ends of the two circular arc motion link mechanisms 1 are circular arc-shaped or linear on their respective movement surfaces. The vertical displacement limiting unit 2 is connected between the two circular arc motion link mechanisms 1. For example, the vertical displacement limiting unit 2 is connected between the movable ends of the two circular arc motion link mechanisms 1, so that when one end of the link-type anti-overturning device 1000 is fixed, the other end of the link-type anti-overturning device 1000 makes an approximate spherical or horizontal plane movement; the vertical displacement limiting unit 2 is preset with a vertical displacement limit value. When the vertical displacement limiting unit 2 reaches the vertical displacement limit value, at this time, the vertical displacement limiting unit 2 begins to bear and transmit tension.

[0029] The link-type anti-overturning device 1000 of the embodiments of the present invention is usually installed in the seismic isolation bearing 3 of the seismic isolation layer of a high aspect ratio seismic isolation building (as Figure 5 shown), and the specific installation position is near the seismic isolation bearing 3 at the building corner point, between the top layer and the bottom layer of the seismic isolation bearing 3. During installation, the two circular arc motion link mechanisms 1 of the link-type anti-overturning device 1000 are fixed to the top layer and the bottom layer of the building seismic isolation layer by means of embedding or post-anchoring or welding, etc., so as to fix the two circular arc motion link mechanisms 1 to the top layer and the bottom layer of the seismic isolation bearing 3 (as Figure 5As shown in the figure). On the one hand, since the two arc motion link mechanisms 1 are arranged orthogonally and inverted in the vertical direction, when one end of the link-type anti-overturning device 1000 is fixed, the other end of the link-type anti-overturning device 1000 can move in an approximately spherical or horizontal plane, enabling the link-type anti-overturning device 1000 to perform synchronous horizontal and vertical movements with the isolation bearing 3. Therefore, the three-dimensional movement of the link-type anti-overturning device 1000 in the embodiment of the present invention can adapt to the natural deformation of various isolation bearings 3 such as friction pendulum bearings, sliding plate bearings, and rubber bearings, avoiding affecting the seismic isolation performance of the isolation bearing 3 and significantly improving the seismic performance of the building, with good applicability; on the other hand, since the vertical displacement limiting unit 2 is connected between the two arc motion link mechanisms 1 to limit the vertical distance between the two arc motion link mechanisms 1, when the vertical displacement limiting unit 2 reaches the vertical displacement limit value, the vertical displacement limiting unit 2 begins to bear and transmit tensile force. In this way, the maximum vertical elongation displacement of the vertical displacement limiting unit 2 can be preset according to the tensile limit value of the building seismic isolation layer on the verge of overturning. When the vertical elongation displacement of the vertical displacement limiting unit 2 reaches the vertical displacement limit value, the vertical displacement limiting unit 2 begins to bear and transmit tensile force, avoiding a large local lift of the building isolation bearing 3, realizing the anti-pulling protection function of the isolation bearing 3, and at the same time avoiding the overturning of the isolated building.

[0030] In summary, the link-type anti-overturning device 1000 in the embodiment of the present invention has the following advantages: First, it can move in cooperation with various types of isolation bearings 3, protecting the isolation bearing 3 from tensile damage while avoiding affecting the horizontal seismic isolation performance of the isolation bearing 3; Second, the force transmission path is clear, the anti-pulling force is large, it can avoid the overturning of the isolated building, and it is suitable for the seismic isolation of high-rise buildings with a large height-width ratio.

[0031] In some embodiments, each arc motion link mechanism 1 includes a movable diamond frame 11, a side link 12, a central link 13, and a fixed end 14 connected by hinges. Among them, the movable diamond frame 11 means that the four sides of the movable diamond frame 11 itself can rotate in a plane, and the connections between the movable diamond frame 11, the side link 12, the central link 13, and the fixed end 14 are all by hinges; the fixed end 14 includes an end body 141 and a protrusion 142 located inside the end body 141. The end body 141 is used to be fixed to the isolation layer. The end body 141 has two first connection points 1411 and is located on both sides of the protrusion 142. The protrusion 142 has a second connection point 1421; each angle in a set of opposite angles of the movable diamond frame 11 is connected to the two first connection points 1411 through the side link 12. For example, one angle in a set of opposite angles of the movable diamond frame 11 is connected to the two first connection points 1411 through two side links 12, and the other angle in a set of opposite angles of the movable diamond frame 11 is also connected to the two first connection points 1411 through another two side links 12; one angle in the other set of opposite angles of the movable diamond frame 11 is connected to the second connection point 1421 through the central link 13, and the other angle in the other set of opposite angles of the movable diamond frame 11 is connected to the vertical displacement limiting unit 2; the movement trajectory of the other angle in the other set of opposite angles of the movable diamond frame 11 is in an arc shape or a straight line shape, that is, the movement trajectory of the movable end of the arc motion link mechanism 1 is in an arc shape or a straight line shape.

[0032] Among the two arc motion link mechanisms 1, the directions of all hinge axes of one arc motion link mechanism 1 are all in the first direction, and the directions of all hinge axes of the other arc motion link mechanism 1 are all in the second direction. The second direction is perpendicular to the first direction, that is, the two arc motion links are connected to the two outer sides of the vertical displacement limiting unit 2 in a mutually orthogonal inverted placement manner.

[0033] In this embodiment, since the movement trajectory of the other angle in the other set of opposite angles of the movable diamond frame 11 is in an arc shape or a straight line shape, and through the orthogonal inverted connection of the two arc motion link mechanisms 1, the function of the other end of the link-type anti-overturning device 1000 performing approximate spherical or planar motion can be realized when one end of the link-type anti-overturning device 1000 is fixed. Therefore, when the link-type anti-overturning device 1000 in this embodiment is installed on the isolation layer, its three-dimensional motion can be adapted to the motion deformation of isolation bearings 3 such as friction pendulum bearings, sliding plate bearings, and rubber bearings. While providing vertical tensile capacity, the presence of the link-type anti-overturning device 1000 is prevented from affecting the horizontal isolation performance of the isolation bearing 3, significantly improving the seismic performance of the building, with good applicability. At the same time, the link-type anti-overturning device 1000 in this embodiment has an anti-pulling protection effect on the isolation bearing 3 under earthquake action, can prevent the isolated building from overturning, and has a simple structure, clear force transmission path, large anti-pulling force, and is easy to manufacture, and is suitable for the isolation of high-rise buildings with a large aspect ratio.

[0034] In some embodiments, the movable diamond frame 11 is formed by sequentially hinging the head and tail of four end links 111 with the same length. The four sides of the movable diamond frame 11 itself can rotate in the plane.

[0035] In some embodiments, with reference to Figure 6 As shown, for each arc motion link mechanism 1, taking the motion plane of the other angle in the other set of diagonals of the movable diamond frame 11 as the projection plane, the projected lengths of all side links 12 on the projection plane are the same. In this way, it is beneficial to ensure that the other angle in the other set of diagonals of the movable diamond frame 11 of the arc motion link mechanism 1, that is, the movable end of the arc motion link mechanism 1, makes an accurate arc motion or linear motion.

[0036] In some embodiments, for each arc motion link mechanism 1, when the projected length of the central link 13 on the projection plane is not equal to the projected length of the line connecting the second connection point 1421 and the first connection point 1411 on the projection plane, the motion trajectory of the other angle in the other set of diagonals of the movable diamond frame 11 is circular; when the projected length of the central link 13 on the projection plane is equal to the projected length of the line connecting the second connection point 1421 and the first connection point 1411 on the projection plane, the motion trajectory of the other angle in the other set of diagonals of the movable diamond frame 11 is linear.

[0037] Specifically, it can be theoretically proven that the movable end of the arc motion link mechanism 1 can only make an accurate arc motion or linear motion.

[0038] The proof process is as follows: Figure 6 The thick line part in the figure is the planar abstract model of the arc motion link mechanism 1. OC is the projection of the side link 12 on the projection plane, EF is the projection of the central link 13 on the projection plane, and CE and BC are the projections of two sides of the movable diamond frame 11 on the projection plane. The circle F is the motion trajectory of point E, and E' is the intersection point of OE and the circle F; draw a parallel line of BF' through point B and intersect OF at point F'. This point B is the other angle in the other set of diagonals of the movable diamond frame 11, that is, the movable end of the arc motion link mechanism 1; let l1 be the projected length of the side link 12 on the projection plane, l2 be the projected distance from the second connection point 1421 to the first connection point 1411 on the projection plane, l′2 be the projected length of the central link 13 on the projection plane, and l3 be the side length of the movable diamond frame 11 on the projection plane.

[0039]

[0040] Similarly:

[0041] Then,

[0042] According to

[0043] Therefore

[0044] F’ is a fixed point, and the length of BF’ is fixed. When l′2 ≠ l2, the movement trajectory of point B is a circle around point F’, that is, the movement trajectory of the movable end of the arc motion link mechanism 1 is circular arc-shaped. When l′2 = l2, the movement trajectory of point B is a straight line, that is, the movement trajectory of the movable end of the arc motion link mechanism 1 is linear-shaped.

[0045] In some embodiments, when the link-type anti-overturning device 1000 is used in cooperation with the friction pendulum isolation bearing, by design, is consistent with the equivalent radius of the friction pendulum isolation bearing, so that the link-type anti-overturning device 1000 performs an approximate spherical motion to cooperate with the natural deformation of the friction pendulum isolation bearing; when the link-type anti-overturning device 1000 is used in cooperation with the sliding plate isolation bearing 3 or the rubber isolation bearing 3, by design, l′2 = l2, so that the link-type anti-overturning device 1000 performs a planar motion to cooperate with the natural deformation of the sliding plate isolation bearing 3 or the rubber isolation bearing 3;

[0046] The above-mentioned l1 is the projected length of the side link 12 on the projection plane, l2 is the projected distance from the second connection point 1421 to the first connection point 1411 on the projection plane, l′2 is the projected length of the central link 13 on the projection plane, and l3 is the side length of the diamond frame on the projection plane.

[0047] In some embodiments, the end body 141 is a cross-shaped structure. The two first connection points 1411 are located on a set of two opposite extension parts of the cross-shaped structure, and the protrusion 142 is located on the other set of two opposite extension parts of the cross-shaped structure. The connection line between the second connection point 1421 and the cross center point of the cross-shaped structure is perpendicular to the cross-shaped structure. This end body 141 has a simple structure and is convenient for processing and manufacturing.

[0048] In some embodiments, the vertical displacement limiting unit 2 includes two connecting end plates 21 and at least one load-bearing rod 22. For example, the number of load-bearing rods 22 can be four or other quantities; the two connecting end plates 21 are arranged oppositely, and the outer sides of the two connecting end plates 21 are respectively hinged to the other corner of the other set of diagonals of the corresponding movable diamond-shaped frame 11. At least one load-bearing rod 22 slidably passes through the two connecting end plates 21. In this way, when the two arc motion link mechanisms 1 move following the top or bottom layer of the corresponding isolation layer, they can drive the corresponding connecting end plates 21 to slide relative to the load-bearing rod 22; stoppers 23 are provided at both ends of at least one load-bearing rod 22, and the stoppers 23 are located outside the corresponding connecting ends. This can prevent the connecting end plates 21 from detaching from the load-bearing rod 22. At the same time, when the two connecting end plates 21 move closer to each other, the load-bearing rod 22 is not stressed. When the two connecting end plates 21 move away from each other until they abut against the stoppers 23 on their respective outer sides, that is, when the vertical elongation displacement of the vertical displacement limiting unit reaches the vertical displacement limit value, at this time, the load-bearing rod 22 begins to bear and transmit tension. The force transmission path is clear and the uplift resistance is large, which has an uplift protection effect on the isolation bearing 3 and can prevent the isolated building from overturning. The link-type anti-overturning device 1000 of this embodiment has a simple structure and is convenient to manufacture.

[0049] In some embodiments, the load-bearing rod 22 is a screw rod, and the stopper 23 is a nut. The nut is in threaded cooperation with the screw rod, which is convenient for disassembly and assembly and has a reliable connection.

[0050] In some embodiments, the positions of the nuts at both ends of each screw rod are adjustable. By adjusting the positions of the nuts on the screw rod, the maximum distance at which the two connecting end plates 21 move away from each other can be adjusted, that is, the vertical displacement limit value of the vertical displacement limiting unit 2 can be set to match different isolation layers.

[0051] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0052] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A connecting rod type anti-overturning device, characterized in that: Used to be installed in the seismic isolation layer of a seismic isolation building, comprising two circular arc motion link mechanisms and a vertical displacement limiting unit, wherein the two circular arc motion link mechanisms are orthogonally invertedly arranged in the up-down direction, and the vertical displacement limiting unit is connected between the two circular arc motion link mechanisms, so that when one end of the link type anti-overturning device is fixed, the other end of the link type anti-overturning device moves approximately in a spherical or horizontal plane; the vertical displacement limiting unit is preset with a vertical displacement limit value, and when the vertical displacement limiting unit is extended to reach the vertical displacement limit value, the vertical displacement limiting unit begins to bear and transmit tension; Each of the circular arc motion link mechanisms comprises a movable diamond frame, a side support link, a central link and a fixed end connected by a hinged manner, the fixed end comprising an end body and a protrusion located inside the end body, the end body is used to be fixed to the seismic isolation layer, the end body has two first connection points and is located on both sides of the protrusion, the protrusion has a second connection point, each of a set of diagonal angles of the movable diamond frame is connected to the two first connection points through the side support link, one of the other set of diagonal angles of the movable diamond frame is connected to the second connection point through the central link, the other of the other set of diagonal angles of the movable diamond frame is connected to the vertical displacement limiting unit, and the motion trajectory of the other of the other set of diagonal angles of the movable diamond frame is in the shape of a circular arc or a straight line; Among the two circular motion link mechanisms, all hinge axis directions of one of the circular motion link mechanisms are in a first direction, and all hinge axis directions of the other circular motion link mechanism are in a second direction, and the second direction is perpendicular to the first direction.

2. The connecting rod type anti-overturning device according to claim 1, characterized in that: The movable diamond frame is formed by hingedly connecting four end connecting rods of the same length end to end in sequence.

3. The connecting rod type anti-overturning device according to claim 1, characterized in that: As for each of the circular motion link mechanisms, the motion surface of another angle in another set of opposite angles of the movable diamond frame is taken as the projection plane, and the projection lengths of all the side branch links on the projection plane are consistent.

4. The connecting rod type anti-overturning device according to claim 3, characterized in that: As for each of the circular motion link mechanisms, when the projection length of the central link on the projection plane is not equal to the projection length of the line connecting the second connection point and the first connection point on the projection plane, the motion trajectory of the other corner of the other set of opposite corners of the movable diamond frame is an arc shape; when the projection length of the central link on the projection plane is equal to the projection length of the line connecting the second connection point and the first connection point on the projection plane, the motion trajectory of the other corner of the other set of opposite corners of the movable diamond frame is a straight line shape.

5. The connecting rod type anti-overturning device according to claim 1, characterized in that: The end body is a cross-shaped structure, the two first connection points are located on a group of two opposite extensions in the cross-shaped structure, the protrusion is located on another group of two opposite extensions in the cross-shaped structure, and the line connecting the second connection point and the intersection center point of the cross-shaped structure is perpendicular to the cross-shaped structure.

6. The connecting rod type anti-overturning device according to claim 1, characterized in that: The vertical displacement limiting unit includes two connecting end plates and at least one load-bearing rod. The two connecting end plates are arranged opposite to each other. The outer sides of the two connecting end plates are respectively hinged to the other corner of the other group of diagonals of the corresponding movable diamond frame. At least one load-bearing rod can slide through the two connecting end plates. Both ends of at least one load-bearing rod are provided with stops, and the stops are located on the outer sides of the corresponding connecting ends.

7. The connecting rod type anti-overturning device according to claim 6, characterized in that: The load-bearing rod is a screw rod, the stopper is a nut, and the nut is matched with the screw rod thread.

8. The connecting rod type anti-overturning device according to claim 7, characterized in that: The positions of the nuts at both ends of each screw rod are adjustable.

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