Lifting buffer platform

Abstract

The invention discloses a lifting buffer platform which provides an initial speed through a lifting assembly when goods ascend, reduces the potential damage risk to a crane due to the fact that tension borne by a steel wire rope is reduced, and meanwhile detects and alarms whether the goods are overweight or not in real time. According to the cargo buffering platform for the small crane, the impact force generated when cargoes descend is buffered through cooperation of the lifting assembly and the buffering assembly, and damage to the cargoes is reduced. The crane cargo buffering device is characterized by being composed of a lifting assembly and a buffering assembly, and the lifting assembly is composed of a crane cargo buffering platform base, a lifting platform supporting hydraulic cylinder, a lifting platform bottom face, a fixed hinge point, a second lifting hinge rod, a guide rod, a first lifting hinge rod, a lifting platform lifting hydraulic cylinder, a hydraulic cylinder pump station assembly and an audible and visual alarm. One end of the lifting platform supporting hydraulic cylinder is fixedly arranged on the top face of the crane cargo buffering platform base, and the other end of the lifting platform supporting hydraulic cylinder is fixedly arranged on the bottom face of the lifting platform.

Description

Technical Field

[0001] The present invention provides a lifting buffer platform, which relates to a platform capable of buffering or supporting cargo to be lifted or lowered by a crane, and belongs to the technical field of crane cargo buffering, and particularly relates to a cargo buffer platform which provides an initial velocity when the cargo rises through a lifting component, reduces the potential risk of damage to the crane caused by reduced tension on the wire rope, and simultaneously detects and alarms in real time whether the cargo is overweight, and buffers the impact force generated when the cargo descends through the cooperation of the lifting component and the buffer component to reduce damage to the cargo. Background Art

[0002] In the current field of small cranes, the lifting and lowering of goods mainly rely on basic mechanical systems and direct power transmission mechanisms. General cranes usually use wire ropes to directly bear the weight of goods when lifting goods, and lack effective buffer mechanisms to relieve the tension on the wire ropes. In the process of lowering goods, most cranes only rely on their control systems to achieve slow descent, and there is no specially designed buffer platform to provide a stable and controllable deceleration process. In terms of overweight detection, it is impossible to accurately determine whether the goods are overweight at the moment they touch the platform. In addition, when lifting goods, the existing small crane platforms do not have a system that can accurately detect the initial speed of the ascent. There is no control to reduce the tension of the wire rope, and there is no downward concession action to buffer when the cargo descends and contacts the platform. Due to the above limitations, when the existing small cranes lift heavy objects, the wire rope is subjected to greater tension, which not only accelerates the wear and fatigue of the wire rope and shortens its service life, but also increases maintenance costs and safety risks. In addition, due to the lack of control over the initial velocity, the tension cannot be effectively reduced. During the cargo descending stage, due to the lack of effective buffering measures, especially the lack of downward concession action when the cargo contacts the platform, a greater impact force may be generated, which may not only cause damage to the cargo itself, but also affect the structural stability of the crane.

[0003] Publication No. CN106698016A discloses a cargo loading and unloading platform, the structure of which includes a bottom plate and a lifting device, the lifting device is installed on the bottom plate, the lifting device includes a storage platform, the storage platform includes two opposite passage openings, the passage openings are respectively provided with connecting plates, the connecting plates and the storage platform are hinged, and a connecting plate control device for controlling the connection plate to rotate relative to the storage platform is provided between the storage platform and the connecting plate; Publication No. CN115959208A discloses a multifunctional transport platform, including a loading platform and a movable plate, the loading platform and the movable plate are slidably connected, a control cylinder is provided on one side of the loading platform, and the control cylinder The cylinder barrel of the cylinder is fixedly connected to the loading platform, and the piston rod of the control cylinder is fixedly connected to the movable plate; the distance between the loading platform and the movable plate can be adjusted, and the movable plate can also be used to load goods after being pulled out from the inside of the loading platform; the cargo placement platform cannot provide an initial upward velocity for the cargo when the crane lifts the cargo, and the steel wire rope of the crane is subjected to a large tension, which can easily cause wear and fatigue of the steel wire rope, increase maintenance costs and safety risks, and when the cargo descends to the platform, there is no downward concession action, which may generate a large impact force and cause damage to the cargo itself. At the same time, the weight of the cargo cannot be detected in real time, and it is impossible to confirm whether the platform can bear the weight of the cargo, thereby causing damage to the platform. Summary of the invention

[0004] In order to improve the above situation, a lifting buffer platform of the present invention provides an initial velocity when the cargo is rising through a lifting component, thereby reducing the potential risk of damage to the crane caused by the reduced tension on the wire rope, and at the same time detecting and alarming in real time whether the cargo is overweight. The lifting component and the buffer component cooperate to buffer the impact force generated when the cargo is descending to reduce damage to the cargo. A cargo buffer platform for a small crane.

[0005] The lifting buffer platform of the present invention is realized as follows: The lifting buffer platform of the present invention is composed of a lifting component and a buffer component. The lifting assembly is composed of a crane cargo buffer platform base, a lifting platform supporting hydraulic cylinder, a lifting platform bottom surface, a fixed hinge point, a second lifting hinge rod, a guide rod, a first lifting hinge rod, a lifting platform lifting hydraulic cylinder, a hydraulic cylinder pump station assembly and an audible and visual alarm. One end of the lifting platform supporting hydraulic cylinder is fixedly placed on the top surface of the crane cargo buffer platform base, and the other end of the lifting platform supporting hydraulic cylinder is fixedly placed on the bottom surface of the lifting platform. Preferably, the crane cargo buffer platform base is a square frame structure. Preferably, the lifting platform support hydraulic cylinders are provided with four, and the four lifting platform support hydraulic cylinders are respectively placed on the four corners of the crane cargo buffer platform base. Preferably, the cross section of the lifting platform is an H-shaped structure, and the lifting platform is composed of a square frame and a bottom plate, and the other end of the lifting platform supporting hydraulic cylinder is respectively placed on the four corners of the lifting platform square frame. The fixed hinge point is fixed on the inner side of the crane cargo buffer platform base. There are two fixed hinge points, which are respectively placed on two opposite inner sides and are symmetrically arranged with respect to the crane cargo buffer platform base. There are sliding grooves on the lifting platform. Preferably, the sliding groove is placed on the inner side of the square frame of the lifting platform and below the bottom plate of the lifting platform. Two sliding grooves are provided and are symmetrically arranged with respect to the lifting platform. One end of the second lifting hinge rod is rotatably connected to the fixed hinge point, and the other end of the second lifting hinge rod cooperates with the sliding groove to be slidably placed on the lifting platform. The inner side of the crane cargo buffer platform base is provided with a sliding groove corresponding to the fixed hinge point. The two ends of the guide rod cooperate with the sliding groove to be slidably placed on the base of the crane cargo buffer platform. One end of the first lifting hinge rod is rotatably connected to the guide rod, and the other end of the first lifting hinge rod is rotatably connected to the inner side of the lifting platform through a rotating shaft and is placed at the bottom of the bottom plate of the lifting platform. Preferably, the two first lifting hinged rods and the two second lifting hinged rods cross each other in a one-to-one correspondence, and the intersection is close to the middle of the first lifting hinged rod and the second lifting hinged rod, and the first lifting hinged rod and the second lifting hinged rod are rotatably connected at the intersection through a rotating shaft. Preferably, a rotatable reinforcing rib is disposed between the two first lifting hinge rods, and a rotatable reinforcing rib is disposed between the two second lifting hinge rods. One end of the lifting platform hydraulic cylinder is rotatably connected to the first lifting hinge rod through a connecting block, and the other end of the lifting platform hydraulic cylinder is rotatably connected to the corresponding second lifting hinge rod through a connecting block. The lifting platform supporting hydraulic cylinder is composed of a hydraulic cylinder housing, a rodless chamber oil circuit, a rodless chamber, a rod chamber, a rod chamber oil circuit, a hydraulic cylinder spring and a hydraulic cylinder push rod. The hydraulic cylinder housing is cylindrical in structure and has an open top. A ring is fixed on the inner side of the middle of the hydraulic cylinder housing. The hydraulic cylinder push rod and the hydraulic cylinder housing are connected by sliding. Preferably, the middle section of the hydraulic cylinder push rod is in sliding and sealing contact with the circular ring, the side surface of one end of the hydraulic cylinder push rod is in sealing and sliding contact with the inner wall of the hydraulic cylinder housing, and the other end of the hydraulic cylinder push rod is located outside the hydraulic cylinder housing and has a diameter larger than the inner diameter of the hydraulic cylinder housing. One end of the hydraulic cylinder push rod divides the interior of the hydraulic cylinder housing into two sealed parts, namely a rodless chamber and a rod chamber. The rodless chamber oil circuit is connected to the inside of the rodless chamber. The rod chamber oil circuit is connected to the inside of the rod chamber. The lifting hydraulic cylinder of the lifting platform and the supporting hydraulic cylinder of the lifting platform have the same structure. The hydraulic cylinder pump station assembly is connected through the hydraulic oil circuit, the rodless chamber oil circuit and the rod chamber oil circuit. The hydraulic cylinder pump station assembly is provided with an audible and visual alarm. A pressure detector is arranged on the hydraulic oil circuit, and the pressure detector is connected to the sound and light alarm through a signal line. The buffer assembly is composed of a hinged bracket, a rotating buffer plate, a buffer spring and a contact triangular prism. The hinged bracket is fixedly placed on the top surface of the lifting platform frame. Preferably, the articulated brackets are provided in two groups, the two groups of articulated brackets are symmetrically arranged, each group is provided with a plurality of articulated brackets, the plurality of articulated brackets in the same group are arranged equidistantly along the length direction of the articulated brackets, and the articulated brackets in each group are on the same straight line. One end of the rotating buffer plate is rotatably connected to the top of the hinged support through the hinged column. One end of the buffer spring is fixedly connected to the top surface of the bottom plate of the lifting platform, and the other end of the buffer spring is fixedly connected to the bottom surface of the other end of the rotating buffer plate. The buffer spring and the rotating buffer plate correspond one to one. The contact triangular prism is fixed on the top surface of the other end of the rotating buffer plate. Preferably, the cross section of the contact triangular prism is a triangular structure, the width of the cross section of the contact triangular prism gradually decreases from the bottom to the top, and the top of the contact triangular prism is an arc-shaped structure. Furthermore, a support column is fixedly mounted on the bottom plate of the lifting platform, the support column and the buffer spring correspond one to one, the buffer spring surrounds the outside of the support column, the support column is in a cylindrical structure, the triangular slope is fixedly mounted on the top surface of the support column, the bottom surface of the triangular slope is the same as the top surface of the support column, the cross section of the triangular slope is in a triangular structure, the corresponding triangular slope slope openings below the two groups of rotating buffer plates are opposite, and the superimposed height of the support column and the triangular slope is less than the height from the bottom plate of the lifting platform to the bottom surface of the rotating buffer plate; Furthermore, the contact triangular prism is replaced by a triangular slope, which is fixed on the top surface of the other end of the rotating buffer plate. The cross-section of the triangular slope is a triangular structure. The cross-sectional width of the triangular slope gradually decreases in an arc shape from the lower end to the top end, and the top of the triangular slope is an arc-shaped structure. Beneficial Effects

[0006] 1. When lifting goods, the initial speed of the hydraulic rod is precisely controlled to effectively reduce the tension of the wire rope.

[0007] 2. When the cargo is lowered, it can effectively absorb the impact force of the cargo and reduce the damage to the cargo and the crane structure.

[0008] 3. The overweight alarm device continuously monitors the weight of the cargo to avoid damage to the platform.

[0009] 4. The whole structure is made of high-strength steel and has sufficient load-bearing capacity and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a three-dimensional structural diagram of a lifting buffer platform of the present invention; Figure 2 This is a structural schematic diagram of a lifting buffer platform of the present invention; Figure 3 This is a structural schematic diagram of a lifting buffer platform of the present invention; Figure 4 This is a structural schematic diagram of a lifting buffer platform of the present invention, which only shows the structure of the hydraulic cylinder; Figure 5 This is a structural schematic diagram of a second embodiment of a lifting buffer platform of the present invention; Figure 6 This is a structural schematic diagram of Embodiment 3 of a lifting buffer platform of the present invention; Figure 7 This is a structural schematic diagram of Example 3 of a lifting buffer platform of the present invention, which only shows the structure of the arc-shaped triangular edges. Attached photos

[0011] The components include: a crane cargo buffer platform base (1), a guide rod (2), an audible and visual alarm (3), a lifting platform support hydraulic cylinder (4), a lifting platform lifting hydraulic cylinder (5), a lifting platform (6), an articulated bracket (7), a rotating buffer plate (8), a buffer spring (9), a contact triangular prism (10), a first lifting articulated rod (11), a second lifting articulated rod (12), a fixed hinge point (13), a hydraulic cylinder pump station assembly (14), a hydraulic oil circuit (15), a rodless cavity oil circuit (16), a rodless cavity (17), a rod cavity (18), a rod cavity oil circuit (19), a hydraulic cylinder housing (20), a hydraulic cylinder spring (21), a hydraulic cylinder push rod (22), a support column (23), a triangular slope (24), and an arc-shaped triangular prism (25). DETAILED DESCRIPTION Example 1

[0012] The lifting buffer platform of the present invention is realized as follows: The lifting buffer platform of the present invention is composed of a lifting component and a buffer component. The lifting assembly is composed of a crane cargo buffer platform base (1), a lifting platform supporting hydraulic cylinder (4), a lifting platform (6) bottom surface, a fixed hinge point (13), a second lifting hinge rod (12), a guide rod (2), a first lifting hinge rod (11), a lifting platform lifting hydraulic cylinder (5), a hydraulic cylinder pump station assembly (14) and an audible and visual alarm (3). One end of the lifting platform supporting hydraulic cylinder (4) is fixedly placed on the top surface of the crane cargo buffer platform base (1), and the other end of the lifting platform supporting hydraulic cylinder (4) is fixedly placed on the bottom surface of the lifting platform (6). Preferably, the crane cargo buffer platform base (1) is a square frame structure. Preferably, the lifting platform supporting hydraulic cylinders (4) are provided with four, and the four lifting platform supporting hydraulic cylinders (4) are respectively placed on the four corners of the crane cargo buffer platform base (1). Preferably, the cross section of the lifting platform (6) is an H-shaped structure, and the lifting platform (6) is composed of a square frame and a bottom plate, and the other end of the lifting platform supporting the hydraulic cylinder (4) is respectively placed on the four corners of the lifting platform (6) square frame. The fixed hinge point (13) is fixedly placed on the inner side of the crane cargo buffer platform base (1). There are two fixed hinge points (13), which are respectively disposed on two opposite inner side surfaces and are symmetrically arranged with respect to the crane cargo buffer platform base (1). The lifting platform (6) is provided with a sliding groove. Preferably, the sliding groove is disposed on the inner side of the square frame of the lifting platform (6) and below the bottom plate of the lifting platform (6). Two sliding grooves are provided and are symmetrically arranged with respect to the lifting platform (6). One end of the second lifting hinge rod (12) is rotatably connected to the fixed hinge point (13), and the other end of the second lifting hinge rod (12) cooperates with the sliding groove to be slidably placed on the lifting platform (6). The crane cargo buffer platform base (1) has a sliding groove on its inner side surface corresponding to the fixed hinge point (13). Both ends of the guide rod (2) cooperate with the sliding grooves to be slidably placed on the crane cargo buffer platform base (1). One end of the first lifting hinge rod (11) is rotatably connected to the guide rod (2), and the other end of the first lifting hinge rod (11) is rotatably connected to the inner side surface of the lifting platform (6) through a rotating shaft and is placed at the bottom of the bottom plate of the lifting platform (6). Preferably, the two first lifting hinged rods (11) and the two second lifting hinged rods (12) cross each other in a one-to-one correspondence, and the intersection is close to the middle of the first lifting hinged rod (11) and the second lifting hinged rod (12), and the first lifting hinged rod (11) and the second lifting hinged rod (12) are rotatably connected at the intersection via a rotating shaft. Preferably, a rotatable reinforcing rib is disposed between the two first lifting hinged rods (11), and a rotatable reinforcing rib is disposed between the two second lifting hinged rods (12). One end of the lifting platform lifting hydraulic cylinder (5) is rotatably connected to a first lifting hinge rod (11) via a connecting block, and the other end of the lifting platform lifting hydraulic cylinder (5) is rotatably connected to a corresponding second lifting hinge rod (12) via a connecting block. The lifting platform supporting hydraulic cylinder (4) is composed of a hydraulic cylinder housing (20), a rodless chamber oil circuit (16), a rodless chamber (17), a rod chamber (18), a rod chamber oil circuit (19), a hydraulic cylinder spring (21), and a hydraulic cylinder push rod (22). The hydraulic cylinder housing (20) is in a cylindrical structure with an open top. A circular ring is fixedly disposed on the inner side surface of the middle portion of the hydraulic cylinder housing (20). The hydraulic cylinder push rod (22) and the hydraulic cylinder housing (20) are slidably connected. Preferably, the middle section of the hydraulic cylinder push rod (22) is in sliding and sealing contact with the circular ring, the side surface of one end of the hydraulic cylinder push rod (22) is in sealing and sliding contact with the inner wall of the hydraulic cylinder housing (20), and the other end of the hydraulic cylinder push rod (22) is located outside the hydraulic cylinder housing (20) and has a diameter greater than the inner diameter of the hydraulic cylinder housing (20). One end of the hydraulic cylinder push rod (22) divides the interior of the hydraulic cylinder housing (20) into two sealed parts, namely a rodless chamber (17) and a rod chamber (18). The rodless chamber oil passage (16) and the rodless chamber (17) are internally connected. The rod chamber oil passage (19) is connected to the inside of the rod chamber (18). The lifting platform lifting hydraulic cylinder (5) and the lifting platform supporting hydraulic cylinder (4) have the same structure. The hydraulic cylinder pump station assembly (14) is connected to the rodless chamber oil circuit (16) and the rod chamber oil circuit (19) through the hydraulic oil circuit (15). The hydraulic cylinder pump station assembly (14) is provided with an audible and visual alarm (3). A pressure detector is disposed on the hydraulic oil circuit (15), and the pressure detector is connected to the sound and light alarm (3) via a signal line. The buffer assembly is composed of a hinged bracket (7), a rotating buffer plate (8), a buffer spring (9) and a contact triangular prism (10). The hinged bracket (7) is fixedly placed on the top surface of the lifting platform (6). Preferably, the articulated brackets (7) are provided in two groups, the two groups of articulated brackets (7) are symmetrically arranged, each group is provided with a plurality of articulated brackets (7), the plurality of articulated brackets (7) in the same group are arranged equidistantly along the length direction of the articulated brackets (7), and the articulated brackets (7) in each group are on the same straight line. One end of the rotating buffer plate (8) is rotatably connected to the top of the hinged column and the hinged bracket (7). One end of the buffer spring (9) is fixedly connected to the top surface of the bottom plate of the lifting platform (6), and the other end of the buffer spring (9) is fixedly connected to the bottom surface of the other end of the rotating buffer plate (8). The buffer spring (9) and the rotating buffer plate (8) correspond one to one. The contact triangular prism (10) is fixedly placed on the top surface of the other end of the rotating buffer plate (8). Preferably, the cross section of the contact triangular prism (10) is a triangular structure, the cross section width of the contact triangular prism (10) gradually decreases from the bottom to the top, and the top of the contact triangular prism (10) is an arc-shaped structure. When in use, during the cargo lifting process, when the cargo is located above the device and needs to be lifted, at the moment when the steel wire rope lifts the cargo upward, the hydraulic cylinder pump station assembly (14) injects hydraulic oil into the rodless cavity (17) through the hydraulic oil circuit (15) and the rodless cavity oil circuit (16), and at the same time, extracts hydraulic oil from the rod cavity (18) through the hydraulic oil circuit (15) and the rod cavity oil circuit (19). This process enables the hydraulic cylinder push rod (22) to rise, and the upward movement of the hydraulic cylinder push rod (22) can be accurately controlled. The initial lifting speed of the hydraulic cylinder is less than the lifting speed of the wire rope, so that the lifting platform supporting hydraulic cylinder (4) generates an upward thrust on the lifting platform (6). At the same time, the lifting platform lifting hydraulic cylinder (5) adjusts the angle between the first lifting hinge rod (11) and the second lifting hinge rod (12), and also generates an upward thrust on the lifting platform (6). In this way, the cargo will generate an initial upward velocity, reducing the tension of the wire rope. When the cargo descends and contacts the device, the lifting platform supporting hydraulic cylinder (4) ) and the lifting platform lifting hydraulic cylinder (5) can make the lifting platform (6) produce a downward concession action. At the same time, the hydraulic cylinder spring (21) can provide a buffer force for the hydraulic cylinder to reduce damage to the hydraulic cylinder. When the hydraulic cylinder ends its movement, it can provide a smooth deceleration and stop. At the same time, the cargo contacts the rotating buffer plate (8), and the rotating buffer plate (8) tilts downward around the hinged bracket (7). The buffer spring (9) provides an upward buffer force for the other end of the rotating buffer plate (8). When the tilt angle is small, the cargo contacts the top of the contact triangular prism (10), thereby providing four straight-line supports for the cargo. When the tilt angle is large, the cargo contacts the triangular plane of the contact triangular prism (10), providing a plane support for the cargo. In addition, when the cargo descends and contacts the device, the hydraulic detector can quickly sense the liquid pressure at the moment when the cargo contacts the platform. Once overweight is detected, a signal is immediately sent to the sound and light alarm (3), and a stop operation instruction is sent to the crane control system at the same time to ensure the safe operation of the entire device. Example 2

[0013] The difference between this embodiment and embodiment 1 is that: a support column (23) is fixedly arranged on the bottom plate of the lifting platform (6), the support column (23) and the buffer spring (9) correspond one to one, the buffer spring (9) surrounds the outside of the support column (23), the support column (23) is in a cylindrical structure, the triangular slope (24) is fixedly arranged on the top surface of the support column (23), the bottom surface of the triangular slope (24) is the same as the top surface of the support column (23), the cross section of the triangular slope (24) is in a triangular structure, the corresponding triangular slopes (24) below the two groups of rotating buffer plates (8) have opposite slope openings, the stacking height of the support column (23) and the triangular slope (24) is less than the height from the bottom plate of the lifting platform (6) to the bottom surface of the rotating buffer plate (8), when in use, when the rotating buffer plate (8) is tilted at a large angle, the buffer spring (9) cannot provide sufficient supporting force, and the triangular slope (24) and the rotating buffer plate (8) are in contact to ensure that the supporting effect continues to be satisfied; Example 3

[0014] The difference between this embodiment and the first embodiment is that: the contact triangular prism (10) is replaced by a triangular slope (24), the triangular slope (24) is fixedly placed on the top surface of the other end of the rotating buffer plate (8), the cross section of the triangular slope (24) is a triangular structure, the cross section width of the triangular slope (24) gradually decreases in an arc shape from the bottom to the top, and the top of the triangular slope (24) is an arc structure. When in use, when the goods are in an arc shape, after the rotating buffer plate (8) is tilted to a certain angle, the goods can contact the arc surface of the arc-shaped triangular prism (25), so that the goods are more stably fixed on the device; The hydraulic cylinder is provided with a hydraulic cylinder spring (21) which can release energy to provide an upward thrust when the hydraulic cylinder push rod (22) is raised, and provide a smooth deceleration and stop at the end of the movement of the hydraulic cylinder, thereby reducing the impact and wear caused by rapid stopping, extending the service life of the hydraulic cylinder and providing a buffering effect for the entire device; The design of installing a pressure detection device on the hydraulic oil circuit (15) can quickly sense the liquid pressure at the moment when the cargo contacts the platform. Once overweight is detected, a signal is immediately sent to the sound and light alarm (3), thereby reducing damage to the device caused by overweight, increasing the service life of the device and reducing maintenance costs; The first lifting hinged rod (11) and the second lifting hinged rod (12) are cross-rotatably connected by adjusting the angle of the lifting platform hydraulic cylinder (5), which can provide additional support force for the lifting platform (6), reduce the pressure of the lifting platform supporting hydraulic cylinder (4), reduce wear and tear, and extend the service life; The buffer spring (9) is arranged between the rotating buffer plate (8) and the lifting platform (6), which can provide a buffering effect when the goods are lowered, can effectively absorb and disperse the impact force, and provide a supporting force when the goods are raised, thereby ensuring that the goods are lifted smoothly; The contact triangular prism (10) is fixedly placed on the top surface of the other end of the rotating buffer plate (8), and the cross-sectional width is gradually reduced from the bottom to the top. When the rotating buffer plate (8) is tilted at a small angle, four straight-line supports can be provided for the goods. When the rotating buffer plate (8) is tilted at a large angle, a flat support can be provided for the goods, thereby increasing the supporting surface of the goods and effectively improving the supporting effect. The purpose is to provide an initial velocity when the cargo is rising through the lifting component, reduce the potential risk of damage to the crane due to reduced tension on the wire rope, and at the same time detect and alarm in real time whether the cargo is overweight. The lifting component and the buffer component cooperate to buffer the impact force generated when the cargo is descending to reduce damage to the cargo.

[0015] It should be noted that, unless otherwise clearly specified and limited, the terms "placed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection method such as a folding connection, a rivet connection, a pin connection, a bonding connection and a welding connection, or a detachable connection method such as a threaded connection, a snap connection and a hinge connection, or an integral connection, or an electrical connection, or a direct connection, or an indirect connection through an intermediate medium, or the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A lifting buffer platform, characterized by: The utility model is composed of a lifting component and a buffer component, wherein the lifting component is composed of a crane cargo buffer platform base, a lifting platform supporting hydraulic cylinder, a lifting platform bottom surface, a fixed hinge point, a second lifting hinge rod, a guide rod, a first lifting hinge rod, a lifting platform lifting hydraulic cylinder, a hydraulic cylinder pump station assembly and an audible and visual alarm. One end of the lifting platform supporting hydraulic cylinder is fixedly placed on the top surface of the crane cargo buffer platform base, and the other end of the lifting platform supporting hydraulic cylinder is fixedly placed on the bottom surface of the lifting platform. The fixed hinge point is fixedly placed on the inner side surface of the crane cargo buffer platform base. There are two fixed hinge points, and the two fixed hinge points are respectively placed on two opposite inner side surfaces and are symmetrical with respect to the crane cargo buffer platform base. The lifting platform is provided with a sliding groove, one end of the second lifting hinge rod is rotatably connected to the fixed hinge point, the other end of the second lifting hinge rod cooperates with the sliding groove and can be slidably placed on the lifting platform, the inner side surface of the crane cargo buffer platform base is provided with a sliding groove corresponding to the fixed hinge point, both ends of the guide rod cooperate with the sliding groove and can be slidably placed on the crane cargo buffer platform base, one end of the first lifting hinge rod is rotatably connected to the guide rod, the other end of the first lifting hinge rod is rotatably connected to the inner side surface of the lifting platform through a rotating shaft, and is placed at the bottom of the lifting platform bottom plate, one end of the lifting hydraulic cylinder of the lifting platform is rotatably connected to the first lifting hinge rod through a connecting block, and the other end of the lifting hydraulic cylinder of the lifting platform is connected through a connecting block The connecting block is rotatably connected with the corresponding second lifting hinge rod. The lifting platform supporting hydraulic cylinder is composed of a hydraulic cylinder housing, a rodless chamber oil circuit, a rodless chamber, a rod chamber, a rod chamber oil circuit, a hydraulic cylinder spring and a hydraulic cylinder push rod. The hydraulic cylinder housing is a cylindrical structure with an open structure at the top. A circular ring is fixed on the inner side surface of the middle part of the hydraulic cylinder housing. The hydraulic cylinder push rod and the hydraulic cylinder housing are slidably connected. One end of the hydraulic cylinder push rod divides the interior of the hydraulic cylinder housing into two sealed parts, namely the rodless chamber and the rod chamber. The rodless chamber oil circuit is connected to the interior of the rodless chamber, and the rod chamber oil circuit is connected to the interior of the rod chamber. The lifting platform lifting hydraulic cylinder and the lifting platform supporting hydraulic cylinder have the same structure, and the hydraulic cylinder pump station assembly is connected by The hydraulic oil circuit is connected with the rodless chamber oil circuit and the rod chamber oil circuit. An audible and visual alarm is provided on the hydraulic cylinder pump station assembly. A pressure detector is provided on the hydraulic oil circuit. The pressure detector and the audible and visual alarm are connected through a signal line. The buffer component is composed of an articulated bracket, a rotating buffer plate, a buffer spring and a contact triangular prism. The articulated bracket is fixed on the top surface of the lifting platform frame. One end of the rotating buffer plate is rotatably connected to the top of the articulated bracket through a hinged column. One end of the buffer spring is fixedly connected to the top surface of the lifting platform bottom plate. The other end of the buffer spring is fixedly connected to the bottom surface of the other end of the rotating buffer plate. The buffer spring and the rotating buffer plate correspond one-to-one. The contact triangular prism is fixedly placed on the top surface of the other end of the rotating buffer plate.

2. A lifting buffer platform according to claim 1, characterized in that A support column is fixed on the bottom plate of the lifting platform, and the support column and the buffer spring correspond one to one. The buffer spring is wrapped around the outside of the support column. The support column is a cylindrical structure. The triangular slope is fixed on the top surface of the support column. The bottom surface of the triangular slope is the same as the top surface of the support column. The cross-section of the triangular slope is a triangular structure. The corresponding triangular slope slope openings under the two groups of rotating buffer plates are opposite, and the superimposed height of the support column and the triangular slope is less than the height from the bottom plate of the lifting platform to the bottom surface of the rotating buffer plate.

3. A lifting buffer platform according to claim 1, characterized in that The contact triangular prism is replaced by a triangular slope, which is fixed on the top surface of the other end of the rotating buffer plate. The cross section of the triangular slope is a triangular structure. The cross-sectional width of the triangular slope gradually decreases in an arc shape from the lower end to the top end, and the top of the triangular slope is an arc structure.

4. A lifting buffer platform according to claim 1, characterized in that The base of the crane cargo buffer platform is a square frame structure, and there are four lifting platform supporting hydraulic cylinders. The four lifting platform supporting hydraulic cylinders are respectively placed on the four corners of the crane cargo buffer platform base. The cross-section of the lifting platform is an H-shaped structure. The lifting platform is composed of a square frame and a bottom plate, and the other ends of the lifting platform supporting hydraulic cylinders are respectively placed on the four corners of the lifting platform frame.

5. A lifting buffer platform according to claim 1, characterized in that The sliding groove is arranged on the inner side surface of the square frame of the lifting platform and is arranged below the bottom plate of the lifting platform. Two sliding grooves are provided and are symmetrically arranged with respect to the lifting platform.

6. A lifting buffer platform according to claim 1, characterized in that The two first lifting hinge rods and the two second lifting hinge rods cross each other in a one-to-one correspondence, and the intersection is close to the middle of the first lifting hinge rod and the second lifting hinge rod. The first lifting hinge rod and the second lifting hinge rod are rotationally connected at the intersection through a rotating shaft.

7. A lifting buffer platform according to claim 6, characterized in that A rotatable reinforcing rib is disposed between the two first lifting hinge rods, and a rotatable reinforcing rib is disposed between the two second lifting hinge rods.

8. A lifting buffer platform according to claim 1, characterized in that The middle section of the hydraulic cylinder push rod is in sliding and sealing contact with a circular ring, the side surface of one end of the hydraulic cylinder push rod is in sealing and sliding contact with the inner wall of the hydraulic cylinder shell, and the other end of the hydraulic cylinder push rod is located outside the hydraulic cylinder shell and has a diameter larger than the inner diameter of the hydraulic cylinder shell.

9. A lifting buffer platform according to claim 1, characterized in that The articulated brackets are provided in two groups, which are symmetrically arranged. There are multiple articulated brackets in each group, and the multiple articulated brackets in the same group are arranged equidistantly along the length direction of the articulated brackets, and the articulated brackets in each group are on the same straight line.

10. A lifting buffer platform according to claim 1, characterized in that The cross section of the contact triangular prism is a triangular structure, the width of the cross section of the contact triangular prism gradually decreases from the bottom to the top, and the top of the contact triangular prism is an arc structure.

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