A crane capable of preventing impact of cross beam starting and a tension buffering structure thereof

Abstract

The application provides a crane preventing starting impact of a cross beam and a tension buffering structure thereof to improve a steel wire rope instant tightening process when a hook lifts a heavy object, eliminate starting impact on the cross beam and power equipment when lifting, and comprises a hook and a tension buffering structure for mounting the hook, the tension buffering structure comprises a rhombus structure composed of an upper connecting piece, a lower connecting piece, a first supporting piece, a second supporting piece and four hinge rods, connecting shafts are arranged on the first supporting piece and the second supporting piece, the axial direction of the connecting shafts is perpendicular to the plane where the rhombus structure is located, two hydraulic cylinders are mounted between the connecting shafts of the first supporting piece and the second supporting piece, and the two ends of each hydraulic cylinder are hingedly connected to the same side end of the connecting shafts of the first supporting piece and the second supporting piece.

Description

TECHNICAL FIELD

[0001] The present application relates to the crane technology field, especially a crane capable of preventing the starting impact of the cross beam and a tension buffering structure thereof. BACKGROUND

[0002] The overhead traveling crane and the portal crane are both used for hoisting objects in the space below the bridge and the portal, and are not limited by the space of the ground equipment, and are widely used in various industries and application sites. Although the two types of cranes are slightly different in structure, they both use the cross beam structure to bear the weight of the hoisted objects. When the weight of the hoisted object is extremely large, the steel wire rope is tightened instantaneously during hoisting, and a large impact force is transmitted to the cross beam and the hoisting power equipment, affecting the service life of the crane. Moreover, during the hoisting process, the hoisted object needs to be turned over (such as the turning over of the upper and lower surfaces of the wing), and the object is hoisted again after being placed at the intermediate point. The loosened steel wire rope is tightened again, which not only impacts the cross beam and the power equipment, but also may cause impact damage to the hoisted object. SUMMARY

[0003] Based on the above technical status, the purpose of the present application is to provide a crane capable of preventing the starting impact of the cross beam and a tension buffering structure thereof, so as to improve the instantaneous tightening process of the steel wire rope when the hook hoists the heavy object, and eliminate the starting impact on the cross beam and the power equipment during hoisting.

[0004] The technical scheme adopted by the present application is as follows: a crane capable of preventing the starting impact of the cross beam, characterized in that it comprises a hook and a tension buffering structure for mounting the hook, the tension buffering structure comprises an upper connecting piece, a lower connecting piece, a first support piece, a second support piece and a rhombus structure composed of four hinge rods, the four hinge rods are the same structure, the upper connecting piece is hinged to one end of a first hinge rod and a second hinge rod, the other end of the first hinge rod is hinged to the first support piece, and the other end of the second hinge rod is hinged to the second support piece; the lower connecting piece is hinged to one end of a third hinge rod and a fourth hinge rod, the other end of the third hinge rod is hinged to the first support piece, and the other end of the fourth hinge rod is hinged to the second support piece;

[0005] The connecting shafts are arranged on the first support piece and the second support piece, the axial direction of the connecting shafts is perpendicular to the plane where the rhombus structure is located, and two hydraulic cylinders are mounted between the connecting shafts of the first support piece and the second support piece, and the two ends of each hydraulic cylinder are hinged to the same side end of the connecting shafts of the first support piece and the second support piece;

[0006] The hydraulic cylinder comprises a hydraulic cylinder body, a piston rod, a cylinder cover, a first spring, the piston rod extends into the hydraulic cylinder body through the cylinder cover, the end of the piston rod away from the hydraulic cylinder body is provided with a first hinged joint, the tail end of the hydraulic cylinder body is provided with a second hinged joint, the first hinged joint and the second hinged joint are respectively hinged to the connecting shafts of the first support and the second support, the first spring is compressively sleeved on the piston rod and is limited between the cylinder cover and the first hinged joint; the inside of the hydraulic cylinder body is filled with hydraulic oil, the end of the piston rod located in the inside of the hydraulic cylinder body is provided with a throttling piston assembly, a plurality of throttling paths for the hydraulic oil to flow through the front and rear end faces of the throttling piston assembly are arranged on the throttling piston assembly.

[0007] The throttling piston assembly comprises a first throttling plate, a flow plate, a flow control member, and a second throttling plate, the first throttling plate is integrally formed at the position close to the end of the piston rod located in the inside of the hydraulic cylinder body, a plurality of first throttling holes penetrating through the front and rear surfaces of the first throttling plate are distributed on the first throttling plate, the second throttling plate is fixedly installed on the end of the piston rod located in the inside of the hydraulic cylinder body, a plurality of second throttling holes penetrating through the front and rear surfaces of the second throttling plate are distributed on the second throttling plate, the flow plate and the flow control member are sequentially sleeved on the piston rod and located between the first throttling plate and the second throttling plate; a plurality of U-shaped notches are circumferentially arranged on the outer circumferential side of the flow plate, the U-shaped notches constitute the flow channel of the hydraulic oil passing through the flow plate; the flow control member is an annular plate sleeved on the piston rod, the outer diameter of the flow control member is greater than the profile diameter defined by the position of the bottom of the U-shaped notch of the flow plate and is less than the outer diameter of the flow plate; the outer diameters of the first throttling plate, the flow plate, and the second throttling plate are adapted to the inner diameter of the hydraulic cylinder body.

[0008] A disc spring is further installed between the throttling plate and the flow control member, specifically, the disc spring comprises two, recesses are arranged on the end faces adjacent to the throttling plate and the flow control member, and the two disc springs are respectively arranged in one recess. The recess is used for positioning the disc spring and simultaneously serving as the accommodation space of the disc spring when the disc spring is deformed and compressed, so that the flow control member can be completely attached to the end face of the flow plate to shield part of the U-shaped notches of the flow plate.

[0009] The hydraulic cylinder further comprises an oil storage cylinder body, the inside space of the oil storage cylinder body is communicated with the inside space of the hydraulic cylinder body through a channel, so that the hydraulic oil stored in the oil storage cylinder body can flow to the inside of the hydraulic cylinder body, the oil storage cylinder body is provided with an oil storage cylinder piston and a second spring, the second spring drives the oil storage cylinder piston to move, so as to drive the hydraulic oil to flow to the inside of the hydraulic cylinder body.

[0010] Further, the side of the hydraulic cylinder body adjacent to the second hinge joint is provided with an opening, and the side of the oil storage cylinder body, which is not provided with the second spring, is also provided with an opening, so that the oil storage cylinder body and the hydraulic cylinder body are assembled together at the two opening positions and a channel for the hydraulic oil to flow between the oil storage cylinder body and the hydraulic cylinder body is formed.

[0011] In the present application, the two hydraulic cylinders are installed in opposite directions, i.e., the installation directions of the two hydraulic cylinders are in a central symmetric installation mode, so that the forces on the left and right sides of the diamond-shaped structure are more balanced when the diamond-shaped structure is compressed.

[0012] In addition, the present application also separately claims a tension buffering structure, which comprises a diamond-shaped structure composed of an upper connecting piece, a lower connecting piece, a first support piece, a second support piece and four hinge rods, the four hinge rods are identical, the upper connecting piece is hingedly connected with one end of a first hinge rod and a second hinge rod, the other end of the first hinge rod is hingedly connected with the first support piece, and the other end of the second hinge rod is hingedly connected with the second support piece; the lower connecting piece is hingedly connected with one end of a third hinge rod and a fourth hinge rod, the other end of the third hinge rod is hingedly connected with the first support piece, and the other end of the fourth hinge rod is hingedly connected with the second support piece.

[0013] The first support piece and the second support piece are both provided with a connecting shaft, the axial direction of the connecting shaft is perpendicular to the plane on which the diamond-shaped structure is located, and two hydraulic cylinders are installed between the connecting shafts of the first support piece and the second support piece, and the two ends of each hydraulic cylinder are hingedly connected to the same side of the connecting shafts of the first support piece and the second support piece.

[0014] The hydraulic cylinder comprises a hydraulic cylinder body, a piston rod, a cylinder cover, and a first spring, the piston rod penetrates through the cylinder cover and extends into the interior of the hydraulic cylinder body, the end of the piston rod away from the hydraulic cylinder body is provided with a first hinge joint, the tail end of the hydraulic cylinder body is provided with a second hinge joint, the first hinge joint and the second hinge joint are hingedly connected to the connecting shafts of the first support piece and the second support piece, respectively, and the first spring is compressively sleeved on the piston rod and is limited between the cylinder cover and the first hinge joint; the interior of the hydraulic cylinder body is filled with hydraulic oil, the end of the piston rod located in the interior of the hydraulic cylinder body is provided with a throttling piston assembly, and a plurality of throttling paths for the hydraulic oil to flow through the front and rear end faces of the throttling piston assembly are arranged on the throttling piston assembly.

[0015] The throttle piston assembly comprises a first throttle plate, a flow plate, a flow control, a second throttle plate, the first throttle plate is integrally formed at the end of the piston rod near the inside of the hydraulic cylinder, a plurality of first throttle holes are distributed on the front and back surfaces of the first throttle plate, the second throttle plate is fixedly installed on the end of the piston rod inside the hydraulic cylinder, a plurality of second throttle holes are distributed on the front and back surfaces of the second throttle plate, the flow plate and the flow control are sequentially sleeved on the piston rod and located between the first throttle plate and the second throttle plate; the outer circumferential side of the flow plate is circumferentially arrayed with a plurality of U-shaped notches, the U-shaped notches constitute the flow channel of the hydraulic oil passing through the flow plate; the flow control is an annular plate sleeved on the piston rod, the outer diameter of the flow control is greater than the profile diameter defined by the bottom of the U-shaped notch of the flow plate and less than the outer diameter of the flow plate; the outer diameters of the first throttle plate, the flow plate and the second throttle plate are matched with the inner diameter of the hydraulic cylinder; a disc spring is further installed between the throttle plate and the flow control.

[0016] The technical scheme of the present application has the following advantages:

[0017] 1. The hook and the steel wire rope are connected through the diamond-shaped connecting assembly, the transmission ratio of the diamond-shaped structure changes between zero and infinity, that is, when the first hinge rod and the second hinge rod are both horizontal, the transmission ratio is considered to be zero, and when the first hinge rod and the second hinge rod are deformed to be parallel to each other in the vertical direction, they bear the upward and downward tension, and the transmission ratio is considered to be infinite, so that the diamond-shaped connecting assembly can provide a safer connection relationship, and when lifting heavy objects, the force applied by the diamond-shaped connecting assembly to the hydraulic cylinder also changes from large to small, so that the hydraulic cylinder can play a better energy absorption effect.

[0018] 2. The structure design of the throttle piston assembly can automatically adjust the throttling effect, when the impact force is large, the flow plate and the flow control are attached to increase the throttling effect, thereby enhancing the impact force absorption effect, so that the hydraulic cylinder has a more superior energy absorption and buffering capacity. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the overall structure diagram of the buffer structure of the crane of the present application;

[0020] Figure 2 is the structure diagram of the diamond-shaped connecting assembly of the crane of the present application;

[0021] Figure 3 is the split structure diagram of the hydraulic cylinder of the crane of the present application;

[0022] Figure 4 is the cross-sectional structure diagram of the hydraulic cylinder of the crane of the present application;

[0023] Figure 5 isFigure 4 Local enlarged view at A;

[0024] Figure 6 Is the over-flow plate structure schematic diagram of the crane of the application;

[0025] Figure 7 Is the over-flow plate, disc spring, over-flow control combination state schematic diagram of the crane of the application;

[0026] Figure 8 Is the over-flow plate, disc spring, over-flow control combination state schematic diagram of the crane of the application;

[0027] In the figure: 1, upper connecting piece, 2, lower connecting piece, 3, hook, 4, diamond connecting assembly, 5, hydraulic cylinder, 6, first support, 7, second support;

[0028] 4-1, first hinge, 4-2, second hinge, 4-3, third hinge, 4-4, fourth hinge;

[0029] 5-1, hydraulic cylinder body, 5-2, cylinder cover, 5-3, piston rod, 5-4, first spring, 5-5, first throttle plate, 5-6, over-flow plate, 5-7, over-flow control, 5-8, second throttle plate, 5-9, locking bolt, 5-10, oil storage cylinder body, 5-11, oil storage cylinder piston, 5-12, second spring, 5-13, first end cover, 5-14, second end cover, 5-15, disc spring. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] The crane for preventing beam starting impact of the present application improves the structure design of the connecting part of the steel wire rope and the hook, as shown in Figure 1 The overall structure schematic diagram of the buffer structure of the crane of the present application is shown in the figure, wherein the upper connecting piece 1 is fixedly connected with the steel wire rope, the lower end of the lower connecting piece 2 is provided with a hook 3, and the diamond connecting assembly 4 is connected together between the upper connecting piece 1 and the lower connecting piece 2. The diamond connecting assembly 4 is provided with a hydraulic cylinder 5 on each side, and the hydraulic cylinder 5 is used to provide a buffer force for resisting deformation when the diamond connecting assembly 4 deforms.

[0032] As shown in Figure 2This is a schematic diagram of the rhomboid connecting assembly structure of the crane of the present invention. Two pin holes are provided at the lower end of the upper connecting member 1, and the two pin holes are respectively hinged to the first ends of the first hinge rod 4-1 and the second hinge rod 4-2 via pin shafts. Two pin holes are also provided at the upper end of the lower connecting member 2, and the first ends of the third hinge rod 4-3 and the fourth hinge rod 4-4 are respectively hinged to them. The rhomboid connecting assembly also includes a first support member 6 and a second support member 7. The first support member 6 is hinged to the second ends of the first hinge rod 4-1 and the third hinge rod 4-3, and the second support member 7 is hinged to the second ends of the second hinge rod 4-2 and the fourth hinge rod 4-4, thereby combining the first hinge rod, the second hinge rod, the third hinge rod, and the fourth hinge rod into a deformable rhomboid structure. Connecting shafts are provided on the outer sides of both the first support member 6 and the second support member 7. The axial direction of the connecting shafts is perpendicular to the plane of the rhomboid structure. Two hydraulic cylinders 5 are installed between the connecting shafts of the first support member 6 and the second support member 7, and the two ends of each hydraulic cylinder 5 are respectively hinged to the same side end of the connecting shaft of the first support member 6 and the second support member 7.

[0033] Figure 3 This is a schematic diagram of the disassembled structure of the hydraulic cylinder of the crane of the present invention. Figure 4 This is a schematic cross-sectional view of the hydraulic cylinder structure of the crane of the present invention; see also Figure 3 , Figure 4 , Figure 3 The oil reservoir section is not shown in the diagram because it is located in... Figure 4 The hydraulic cylinder 5 is clearly and intuitively shown in the diagram. It includes a cylinder body 5-1, a piston rod 5-3, a cylinder head 5-2, and a first spring 5-4. The piston rod 5-3 extends into the cylinder body 5-1 through the cylinder head 5-2. A first hinge joint is formed at the end of the piston rod 5-3 away from the cylinder body 5-1. A second hinge joint is provided at the tail end of the cylinder body 5-1. The first and second hinge joints are respectively hinged to the connecting shafts of the first support member 6 and the second support member 7, allowing the hydraulic cylinder 5 to be hinged and mounted on the rhomboid structure. The first spring 5-4 is sleeved on the piston rod 5-3 and limited between the cylinder head 5-2 and the first hinge joint. The spring 5-4 is initially set to a compressed state to provide a tendency for the piston rod 5-3 to move away from the hydraulic cylinder 5-1. The end of the piston rod 5-3 located inside the hydraulic cylinder 5-1 is provided with a throttling piston assembly. The throttling piston assembly is provided with multiple throttling channels connecting the front and rear end faces of the throttling piston assembly. The throttling channels allow hydraulic oil to flow in the space on both sides of the throttling piston assembly inside the hydraulic cylinder 5-1 when the piston rod 5-3 moves in extension and retraction. Through the combined action of hydraulic pressure and throttling effect, a force is generated that resists the reciprocating motion of the piston rod 5-3, so that the deformation motion of the rhomboid structure, which expands to both sides and contracts inward, can be dissipated by hydraulic force.

[0034] SeeFigure 4 The hydraulic cylinder 5 further comprises an oil storage cylinder 5-10, the inside space of which is communicated with the inside space of the hydraulic cylinder 5-1 through a channel, so that the hydraulic oil stored in the oil storage cylinder 5-10 can flow to the inside of the hydraulic cylinder 5-1. The inside of the oil storage cylinder 5-10 is provided with an oil storage cylinder piston 5-11 and a second spring 5-12, the second spring 5-12 pushes the oil storage cylinder piston 5-11 to move, so as to push the hydraulic oil to flow to the inside of the hydraulic cylinder 5-1. In this embodiment, the two ends of the oil storage cylinder 5-10 are respectively closed by a first end cover 5-13 and a second end cover 5-14. Obviously, the oil storage cylinder 5-10 can also adopt a barrel structure with one end open, and an end cover is arranged at the open end to close the whole cylinder. Further, the side of the hydraulic cylinder 5-1 close to the second hinge joint is provided with an opening, and the side of the oil storage cylinder 5-10, which is not provided with the second spring 5-12, is also provided with an opening, so that the oil storage cylinder 5-10 and the hydraulic cylinder 5-1 are assembled together at the opening position, and a channel for the hydraulic oil to flow between the oil storage cylinder 5-10 and the hydraulic cylinder 5-1 is formed.

[0035] Figure 5 is Figure 4 A partial enlarged view of A in FIG. 5 shows a sectional structure of the throttle piston assembly. A first throttle plate 5-5 is integrally formed on the piston rod 5-3 close to the end position. A plurality of first throttle holes penetrating through the front and back surfaces of the first throttle plate 5-5 are distributed on the first throttle plate 5-5. A flow-through plate 5-6 and a flow-through control 5-7 are sequentially sleeved on the piston rod 5-3 outside the first throttle plate 5-5. Two opposing disc springs 5-15 are arranged between the flow-through plate 5-6 and the flow-through control 5-7. The deformation of the disc springs 5-15 can adjust the relative distance between the flow-through plate 5-6 and the flow-through control 5-7. A second throttle plate 5-8 is fixedly installed on the end of the piston rod 5-3. The second throttle plate 5-8 limits the flow-through plate 5-6 and the flow-through control 5-7 between the first throttle plate 5-5 and the second throttle plate 5-8. Specifically, an axial mounting hole is arranged on the end of the piston rod 5-3, a threaded hole is arranged at the bottom of the mounting hole, the second throttle plate 5-8 comprises a plate body and a mounting part, a stepped hole penetrating through the second throttle plate 5-8 is arranged at the center of the mounting part, the mounting part is installed in the mounting hole to position the second throttle plate at the end of the piston rod 5-3, and a locking bolt 5-9 penetrating through the stepped hole is screwed into the threaded hole at the bottom of the mounting hole to fix the second throttle plate 5-8. A plurality of second throttle holes penetrating through the front and back surfaces of the plate body of the second throttle plate 5-8 are arranged on the plate body.

[0036] Further, referring to Figure 5The outer diameter of the first throttle plate 5-5, the flow plate 5-6 and the second throttle plate 5-8 is matched with the inner diameter of the hydraulic cylinder body 5-1, so as to ensure the sliding movement of the throttle piston assembly inside the hydraulic cylinder body 5-1.

[0037] Figure 6 The outer peripheral side of the flow plate 5-6 is circumferentially arranged with a plurality of U-shaped notches, and the U-shaped notches form flow channels for the hydraulic oil to pass through the flow plate 5-6.

[0038] Figure 7 The flow plate 5-6, the disc spring 5-15 and the flow control 5-7 are combined. Figure 8 The flow plate 5-6, the disc spring 5-15 and the flow control 5-7 are combined. Figure 7 Figure 8 The disc spring 5-15 is arranged between the flow plate 5-6 and the flow control 5-7 to separate them by a certain distance.

[0039] The recesses are arranged on the adjacent end faces of the flow plate 5-6 and the flow control 5-7, and the disc springs 5-15 are arranged in the recesses.

[0040] ​The principle of the hoisting buffer is further described below in combination with the drawings: when the heavy object is hoisted, the tension between the upper connecting piece 1 and the lower connecting piece 2 causes the diamond connecting assembly 4 to shrink, the first support 6 and the second support 7 approach each other and compress the two hydraulic cylinders 5, the internal throttle piston assembly of the hydraulic cylinder 5 moves inward, part of the hydraulic oil is pushed into the oil storage cylinder body 5-10, and the second spring 5-12 is compressed by the oil storage cylinder piston 5-11, part of the hydraulic oil flows to the outside of the throttle piston assembly through the flow path formed by the second throttle hole, the U-shaped notch and the first throttle hole, and the first spring 5-4 is compressed when the piston rod 5-3 moves inward, and the slow compression of the hydraulic cylinder 5 is realized under the combined action of the first spring, the second spring and the throttle piston assembly to absorb the gravity impact of the heavy object in the hoisting moment; when the gravity impact is too large, the movement trend of the throttle piston assembly increases, the hydraulic oil pressure forces the overflow control 5-7 to compress the disc spring 5-15 and thus adhere to the overflow plate 5-6, block part of the U-shaped notch, and the flow path formed by the second throttle hole, the U-shaped notch and the first throttle hole is further reduced in flow area, and the throttling effect is enhanced, thereby enhancing the absorption effect of the impact force.

[0041] During the hoisting of the heavy object, when the heavy object shakes due to external force or speed, the hydraulic cylinder 5 absorbs the gravity change caused by the shaking of the heavy object by compression and expansion, and the heavy object lifted in position remains in a relatively stable state. After the hoisting is completed, the piston rod 5-3 moves outward under the restoring force of the first spring and the second spring, thereby driving the diamond connecting assembly 4 to expand and recover to the initial state.

[0042] Although the specific embodiments of the present application have been described above in combination with the drawings, it is not a limitation on the protection scope of the present application, and those skilled in the art should understand that various equivalent structures or equivalent processes can be made on the basis of the technical solutions of the present application without creative labor, or directly or indirectly applied to other related technical fields, which are still within the protection scope of the present application.

Claims

1. A crane protected against beam launch impact, characterized in that, The utility model provides a hook and the tension buffer structure for installing hook, the tension buffer structure, including upper connecting piece, lower connecting piece, first support, second support and the rhombus structure of four hinge rods, four hinge rods structure is same, upper connecting piece is hinged with first hinge rod and second hinge rod one end, first hinge rod other end is hinged with first support, second hinge rod other end is hinged with second support, lower connecting piece is hinged with third hinge rod and fourth hinge rod one end, third hinge rod other end is hinged with first support, fourth hinge rod other end is hinged with second support, The first support and the second support are provided with the connecting shaft, the axial direction of the connecting shaft is perpendicular to the plane of the rhombus structure, and the connecting shafts of the first support and the second support are provided with two hydraulic cylinders. The hydraulic cylinder comprises a hydraulic cylinder body, a piston rod, a cylinder cover, and a first spring. The piston rod extends into the interior of the hydraulic cylinder body through the cylinder cover. A first hinge joint is formed at the end of the piston rod away from the hydraulic cylinder body. A second hinge joint is arranged at the tail end of the hydraulic cylinder body. The first and second hinge joints are hingedly connected to the connecting shafts of the first and second supports, respectively. The first spring is compressedly sleeved on the piston rod and is limited between the cylinder cover and the first hinge joint. The interior of the hydraulic cylinder body is filled with hydraulic oil. The end of the piston rod located in the interior of the hydraulic cylinder body is provided with a throttling piston assembly. A plurality of throttling paths for the hydraulic oil to flow through the front and back end faces of the throttling piston assembly are arranged on the throttling piston assembly. The throttling piston assembly comprises a first throttling plate, a flow plate, a flow control member, and a second throttling plate. The first throttling plate is integrally formed at the end of the piston rod located in the interior of the hydraulic cylinder body. A plurality of first throttling holes penetrating through the front and back surfaces of the first throttling plate are arranged on the first throttling plate. The second throttling plate is fixedly installed on the end of the piston rod located in the interior of the hydraulic cylinder body. A plurality of second throttling holes penetrating through the front and back surfaces of the second throttling plate are arranged on the second throttling plate. The flow plate and the flow control member are sequentially sleeved on the piston rod and located between the first throttling plate and the second throttling plate. The outer circumferential side of the flow plate is circumferentially arrayed with a plurality of U-shaped notches. The U-shaped notches constitute the flow channel of the hydraulic oil passing through the flow plate. The flow control member is an annular plate sleeved on the piston rod. The outer diameter of the flow control member is greater than the profile diameter defined by the position of the bottom of the U-shaped notch of the flow plate and less than the outer diameter of the flow plate. The outer diameters of the first throttling plate, the flow plate, and the second throttling plate are adapted to the inner diameter of the hydraulic cylinder body. The hydraulic cylinder further comprises an oil storage cylinder body. The interior space of the oil storage cylinder body is communicated with the interior space of the hydraulic cylinder body through a channel, so that the hydraulic oil stored in the oil storage cylinder body can flow into the interior of the hydraulic cylinder body. An oil storage cylinder piston and a second spring are arranged in the interior of the oil storage cylinder body. The second spring drives the oil storage cylinder piston to move, so as to drive the hydraulic oil to flow into the interior of the hydraulic cylinder body. The side of the hydraulic cylinder body near the second hinge joint is provided with an opening, and the side of the oil storage cylinder body where the second spring is not installed is also provided with an opening, so that the oil storage cylinder body and the hydraulic cylinder body are assembled together at the two opening positions and a channel for hydraulic oil to flow between the oil storage cylinder body and the hydraulic cylinder body is formed.

2. A cross beam launch impact resistant crane according to claim 1, characterized in that, A disc spring is further installed between the throttle plate and the overflow control.

3. A cross member launch impact resistant crane as claimed in claim 2, characterised in that, The disc spring includes two, and each of the two disc springs is arranged in a groove formed on the end face adjacent to the throttle plate and the overflow control.

4. A cross member launch impact resistant crane as claimed in claim 1, characterized in that, The two ends of the oil storage cylinder body are respectively closed by a first end cover and a second end cover.

5. A cross member launch impact resistant crane as claimed in claim 1, characterized in that, The two hydraulic cylinders are installed in opposite directions.

6. A tension buffering structure comprising a diamond structure formed by an upper connecting piece, a lower connecting piece, a first support piece, a second support piece and four hinge rods, the four hinge rods being identical, the upper connecting piece being hingedly connected to one end of a first hinge rod and a second hinge rod, the other end of the first hinge rod being hingedly connected to the first support piece, and the other end of the second hinge rod being hingedly connected to the second support piece; the lower connecting piece being hingedly connected to one end of a third hinge rod and a fourth hinge rod, the other end of the third hinge rod being hingedly connected to the first support piece, and the other end of the fourth hinge rod being hingedly connected to the second support piece; The first support piece and the second support piece are each provided with a connecting shaft, the axial direction of the connecting shaft being perpendicular to the plane on which the diamond structure is located, and two hydraulic cylinders are installed between the connecting shafts of the first support piece and the second support piece, the two ends of each hydraulic cylinder being hingedly connected to the same side of the connecting shafts of the first support piece and the second support piece. The hydraulic cylinder comprises a hydraulic cylinder body, a piston rod, a cylinder cover, and a first spring, the piston rod extending into the interior of the hydraulic cylinder body through the cylinder cover, the end of the piston rod away from the hydraulic cylinder body being provided with a first hinge joint, the tail end of the hydraulic cylinder body being provided with a second hinge joint, the first hinge joint and the second hinge joint being hingedly connected to the connecting shafts of the first support piece and the second support piece respectively, and the first spring being compressively sleeved on the piston rod and being limited between the cylinder cover and the first hinge joint; the interior of the hydraulic cylinder body is filled with hydraulic oil, and the end of the piston rod located in the interior of the hydraulic cylinder body is provided with a throttling piston assembly, and a plurality of throttling paths for hydraulic oil to flow through the front and rear end faces of the throttling piston assembly are arranged on the throttling piston assembly. The throttling piston assembly comprises a first throttling plate, an overflow plate, an overflow control, and a second throttling plate, the first throttling plate being integrally formed at the end of the piston rod located in the interior of the hydraulic cylinder body, and a plurality of first throttling holes penetrating through the front and rear surfaces of the first throttling plate being distributed on the first throttling plate; The second throttling plate is fixedly installed on the end of the piston rod located in the interior of the hydraulic cylinder body, a plurality of second throttling holes penetrating through the front and rear surfaces of the second throttling plate are distributed on the second throttling plate, and the overflow plate and the overflow control are sequentially sleeved on the piston rod and located between the first throttling plate and the second throttling plate. The outer circumferential side of the flow plate is provided with a plurality of U-shaped notches in a circumferential array, and the U-shaped notches form flow channels for hydraulic oil to pass through the flow plate; the flow control member is an annular plate sleeved on the piston rod, and the outer diameter of the annular plate is greater than the profile diameter defined by the bottom of the U-shaped notches of the flow plate and less than the outer diameter of the flow plate; The outer diameters of the first throttle plate, the flow plate and the second throttle plate are adapted to the inner diameter of the hydraulic cylinder body; a disc spring is further installed between the throttle plate and the flow control member; The hydraulic cylinder further comprises an oil storage cylinder body, and the internal space of the oil storage cylinder body is communicated with the internal space of the hydraulic cylinder body through a channel, so that the hydraulic oil stored in the oil storage cylinder body can flow to the internal space of the hydraulic cylinder body; the oil storage cylinder body is internally provided with an oil storage cylinder piston and a second spring, and the second spring drives the movement of the oil storage cylinder piston to drive the hydraulic oil to flow to the internal space of the hydraulic cylinder body; The side of the hydraulic cylinder body near the second hinge joint is provided with an opening, and the side of the oil storage cylinder body near the end where the second spring is not installed is also provided with an opening, so that the oil storage cylinder body and the hydraulic cylinder body are assembled together at the two opening positions and a channel for the hydraulic oil to flow between the oil storage cylinder body and the hydraulic cylinder body is formed.

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