Hydraulic stabilizer for port large crane

Abstract

The application discloses a hydraulic stabilizer for a port large crane, relates to the technical field of shock absorbers, and comprises a main body, a main shaft, two end covers and two connecting flanges. A swing block and a fixed block are arranged in the cavity between the main body and the main shaft. The swing block and the fixed block divide the cavity between the main body and the main shaft into a first chamber and a second chamber. The swing block is provided with a first oil passing hole, a second oil passing hole and a plunger hole. The plunger hole is provided with a first pin, a second pin, a first spring and a second spring. The first pin and the second pin are in sliding fit with the plunger hole. The stabilizer can realize faster buffering when the crane suddenly produces large action, and the service life of the device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shock absorbers, in particular to a hydraulic stabilizer for a large-scale crane in a port. BACKGROUND

[0002] The large-scale crane in a port and the like has an image acquisition system installed thereon to assist an operator in performing quick and accurate hoisting work, because the position of the operating room is high and the line of sight is blocked. The camera in the image acquisition system is generally installed on a large arm to acquire images on the ground vertically downward. Since the large arm rotates during hoisting of the crane, the camera is required to be connected to the large arm to ensure that the camera can always be vertically downward for shooting under the action of its own weight. A stabilizer is generally used to connect the camera and the large arm to buffer the shaking of the camera caused by inertia.

[0003] A hydraulic stabilizer is disclosed in a Chinese patent with the authorization announcement number CN108840241B; the stabilizer comprises a main body, a main shaft and two end covers, a cavity between the main body and the main shaft is provided with a swing block and a fixed block, the swing block and the fixed block divide the cavity between the main body and the main shaft into a first chamber and a second chamber which are separated from each other, the first chamber and the second chamber are filled with hydraulic oil, the fixed block is fixed to the main body, the swing block is fixed to the main shaft, a double-opening valve is formed in the fixed block or the swing block, the double-opening valve comprises a first oil passage, a second oil passage and a plunger hole, the plunger hole is formed in the fixed block or the swing block, the first oil passage is in communication with the first chamber and the plunger hole, the second oil passage is in communication with the second chamber and the plunger hole, a pin, a first spring and a second spring are arranged in the plunger hole, the pin is located between the first spring and the second spring, and the pin is in sliding sealing cooperation with the plunger hole.

[0004] The above device can further reduce the shaking of the camera under smaller vibration, however, since the pin has springs fixed at both ends thereof, when the pin is pushed, the springs at both ends of the pin will be deformed at the same time, the deformation degree of the springs at both ends is relatively large, which leads to a relatively low service life of the springs; in addition, the oil needs to overcome the elastic force of the two springs at the same time, if the crane boom has a relatively large sudden action, the time for the first oil passage and the second oil passage to be communicated is relatively slow, so that the swing block may not be able to be timely damped. SUMMARY

[0005] The hydraulic stabilizer for a large-scale crane in a port provided by the present application solves the technical problem that the damping reaction of the stabilizer is slow when the crane suddenly moves greatly and the two springs need to be deformed at the same time every time, which leads to a relatively short service life, and achieves the technical effect that the stabilizer can be damped more quickly when the crane suddenly moves greatly and the service life of the device is improved.

[0006] The embodiment of the present application provides a hydraulic stabilizer for a port large crane, which comprises a main body, a main shaft, two end covers and two connecting flanges, the end covers are fixed at two ends of the main body, the main shaft is coaxial with the main body and is in rotating sealing connection with the end covers; a cavity between the main body and the main shaft is filled with oil and is provided with a swing block and a fixed block, the swing block and the fixed block divide the cavity between the main body and the main shaft into a first chamber and a second chamber, the fixed block is fixed to the inner side wall of the main body, and the swing block is fixed to the main shaft;

[0007] A first oil passing hole, a second oil passing hole and a plunger hole are formed in the swing block, the first oil passing hole and the second oil passing hole are formed in the outer surface of the swing block, the first oil passing hole, the first chamber and the plunger hole are in communication, the second oil passing hole, the second chamber and the plunger hole are in communication, the plunger hole is provided with a first pin, a second pin, a first spring and a second spring, the first spring is coaxially fixed to one end of the plunger hole close to the first oil passing hole, the second spring is coaxially fixed to one end of the plunger hole close to the second oil passing hole, the first pin is fixedly connected to the movable end of the first spring, the second pin is fixedly connected to the movable end of the second spring, and the first pin and the second pin are in sliding fit with the plunger hole; when the first spring and the second spring are not subjected to external force, the first pin and the second pin simultaneously isolate the first oil passing hole and the second oil passing hole.

[0008] Preferably, when the first spring and the second spring are not subjected to external force, the sum of the length of the first spring and the length of the second spring is two-thirds of the length of the plunger hole.

[0009] Preferably, the cross section of the plunger hole is rectangular; the first pin and the second pin are trapezoidal blocks, the shape and size of the first pin and the second pin are the same, the inclined surfaces of the first pin and the second pin are oppositely arranged, and the first pin and the second pin can be combined into a rectangular block after being attached.

[0010] Preferably, a gap of 0.2mm to 0.6mm is left between the upper and lower bottom edges of the first pin and the side wall of the plunger hole, so that the first pin can be inclined in the plunger hole.

[0011] Preferably, a connecting capsule is arranged between the opposite surfaces of the first pin and the second pin, the connecting capsule is a cylindrical elastic capsule body, the connecting capsule is coaxially arranged with the plunger hole, the two ends of the connecting capsule are open, and the edges of the openings are fixedly connected with the edges of the opposite surfaces of the first pin and the second pin, respectively, a closed space is formed between the first pin, the second pin and the connecting capsule, and the closed space is filled with gas; the elastic coefficient of the connecting capsule is smaller than the elastic coefficient of the first spring or the second spring, so that the connecting capsule is more easily stretched than the first spring or the second spring.

[0012] A first liquid discharging channel and a second liquid discharging channel are formed in the swing block.

[0013] Preferably, the second liquid discharge channel is arranged in the side wall of the swing block near the first oil passage, and both ends thereof are communicated to the plunger hole, one end thereof is located near the connecting bag when the first plunger pin is in the initial position, and the other end thereof is located near the second oil passage when the second plunger pin is not subjected to external force;

[0014] The first liquid discharge channel is arranged in the side wall of the swing block near the second oil passage, and both ends thereof are communicated to the plunger hole, one end thereof is located near the connecting bag when the second plunger pin is in the initial position, and the other end thereof is located near the second oil passage when the first plunger pin is not subjected to external force;

[0015] When the first plunger pin and the second plunger pin are both in a state of not being subjected to oil pressure, the connecting bag is in a stretched state, at this time, the diameter of the connecting bag is reduced; when the first plunger pin or the second plunger pin is in a state of being pushed by oil, the distance between the first plunger pin and the second plunger pin is shortened, the connecting bag is contracted along the axial direction, and at the same time, due to the constant amount of gas in the connecting bag, the connecting bag is radially expanded to discharge oil from the first liquid discharge channel or the second liquid discharge channel.

[0016] Preferably, a magnetic ball is movably arranged in the connecting bag, and the magnetic ball is a spherical body with magnetism.

[0017] A ball groove is arranged on the side wall of the first oil passage away from the second oil passage, the ball groove is a semispherical groove, a permanent magnet is embedded in the ball groove, and the permanent magnet can be magnetically attracted to the magnetic ball; the diameter of the ball groove is greater than the diameter of the magnetic ball, and the diameter of the ball groove is matched with the diameter of the magnetic ball.

[0018] Preferably, the combination of the ball groove and the permanent magnet has two, which are arranged on the side wall of the first oil passage and the side wall of the second oil passage respectively; the ball groove on the second oil passage is arranged on the side wall away from the first oil passage.

[0019] Preferably, the magnetic ball is a hollow spherical body, the magnetic ball is made of elastic rubber material, the magnetic ball is filled with gas and magnetic powder, the gas enables the magnetic ball to maintain a spherical shape when not subjected to external force, and provides elastic force for the whole magnetic ball, so that the magnetic ball is more easily extruded by the inclined surface of the first plunger pin and the second plunger pin, and the magnetic powder is a particle with magnetism, and the magnetic powder can be attracted to the permanent magnet.

[0020] The permanent magnet is embedded in the inner wall of the ball groove, so that the magnetic powder can be completely laid out in the ball groove after being attracted to the permanent magnet, thereby driving the surface of the magnetic ball to adapt to the shape of the ball groove after deformation.

[0021] Preferably, an annular clamping block is fixed on the opening edge of the ball groove, the outer edge of the clamping block is fixedly connected with the opening edge of the ball groove, and the inner diameter of the clamping block is smaller than the diameter of the magnetic ball, so that when the magnetic ball is attracted into the ball groove, the middle part of the magnetic ball is concave, and the whole magnetic ball is in the shape of a calabash, thereby being stably clamped in the ball groove.

[0022] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0023] By setting the first pin and the second pin, the first pin and the second pin are spaced apart by a distance, when the crane is in action, the oil enters the plunger hole from the first oil hole or the second oil hole, and pushes the first pin or the second pin to advance, so that the first pin and the second pin are close, and in the process of closing, only one spring is stretched and deformed, and the movement speed of the pin in this process is relatively fast; when the first pin and the second pin contact, the other spring is only compressed and the first oil hole and the second oil hole are connected, so that the camera is not immediately rotated when the crane is slightly vibrated, and the camera is stable when the camera is slightly vibrated; when the crane is in action, the camera can be buffered faster; secondly, only one spring is stretched and deformed each time, and the other spring only needs to be compressed by a small amount, so that compared with the mode that two springs are deformed at the same time, the spring action frequency is reduced, the service life of the spring is increased, the reaction of the stabilizer is more sensitive, and the technical problems that the buffering reaction of the stabilizer is slow when the crane is suddenly and greatly actuated, and two springs need to be deformed at the same time each time, resulting in a short service life, are solved; the technical effects that the stabilizer can buffer faster when the crane is suddenly and greatly actuated, and the service life of the device is improved, are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a whole structure schematic view of the hydraulic stabilizer for the port large crane of the present application;

[0025] Figure 2 It is a B-B sectional view schematic view of the hydraulic stabilizer for the port large crane of the present application;

[0026] Figure 3 It is an A-A sectional view schematic view of the hydraulic stabilizer for the port large crane of the present application;

[0027] Figure 4 It is a plunger hole overhead sectional view schematic view of the hydraulic stabilizer for the port large crane of the present application;

[0028] Figure 5 It is a plunger hole overhead sectional view schematic view of the hydraulic stabilizer for the port large crane of the present application;

[0029] Figure 6 It is a second pin inclined state schematic view of the hydraulic stabilizer for the port large crane of the present application;

[0030] Figure 7 It is a connecting capsule stretching state schematic view of the hydraulic stabilizer for the port large crane of the present application;

[0031] Figure 8 Figure 3 is a schematic diagram of the connection capsule in the inflated state according to the third embodiment of the hydraulic stabilizer for large port cranes of the present application;

[0032] Figure 9 Figure 4 is a schematic diagram of the magnetic ball position according to the fourth embodiment of the hydraulic stabilizer for large port cranes of the present application;

[0033] Figure 10 Figure 5 is a schematic diagram of the magnetic ball internal structure according to the fifth embodiment of the hydraulic stabilizer for large port cranes of the present application;

[0034] Figure 11 Figure 6 is a schematic diagram of the magnetic ball deformation state in the ball groove according to the fifth embodiment of the hydraulic stabilizer for large port cranes of the present application.

[0035] Figure 12 Figure 6 is a schematic diagram of the magnetic ball deformation state in the ball groove according to the fifth embodiment of the hydraulic stabilizer for large port cranes of the present application.

[0036] In the drawings:

[0037] 100, main body; 200, end cap; 300, connection flange; 400, fixed block; 500, swing block; 510, plunger hole; 511, first oil passage hole; 512, second oil passage hole; 520, first spring; 530, second spring; 540, first column pin; 550, second column pin; 560, connection capsule; 561, magnetic ball; 562, magnetic powder; 570, first drainage channel; 580, second drainage channel; 590, ball groove; 591, magnet; 592, clamping block; 600, first chamber; 700, second chamber; 800, oil replacement hole; 900, main shaft. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings, in which preferred embodiments of the present application are shown; however, the present application can be realized in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the present application to those skilled in the art.

[0039] It should be noted that the terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0041] Example 1: As Figures 1 to 4 As shown, this application discloses a hydraulic stabilizer for a large port crane, comprising a main body 100, a main shaft 900, two end caps 200, and two connecting flanges 300. The main body 100 is a tubular body open at both ends. The two end caps 200 are sealed and fixed at both ends of the main body 100. The main shaft 900 passes through the two end caps 200 and is coaxial with the main body 100, and is rotatably and sealingly connected to the end caps 200. The connecting flanges 300 are located at both ends of the main shaft 900 and are fixedly connected to the main shaft 900. A camera is fixedly connected to the main body 100, and the connecting flanges 300 are connected to the main shaft 900. The boom of the heavy machinery is fixedly connected; a swing block 500 and a fixed block 400 are provided in the cavity between the main body 100 and the main shaft 900. The swing block 500 and the fixed block 400 divide the cavity between the main body 100 and the main shaft 900 into a first chamber 600 and a second chamber 700 that are separated from each other. The first chamber 600 and the second chamber 700 are filled with hydraulic oil. The fixed block 400 is fixed relative to the inner side wall of the main body 100, and the swing block 500 is fixed relative to the main shaft 900. A double-opening valve is provided on the fixed block 400 or the swing block 500. The double-opening valve includes a first oil passage hole 511, a second oil passage hole 512 and a plunger hole 510.

[0042] The plunger hole 510 is formed inside the swing block 500. The first oil passage hole 511 and the second oil passage hole 512 are formed on the outer surface of the swing block 500. The first oil passage hole 511, the first chamber 600 and the plunger hole 510 are connected. The second oil passage hole 512, the second chamber 700 and the plunger hole 510 are also connected. A first pin 540, a second pin 550, a first spring 520 and a second spring 530 are provided inside the plunger hole 510. The first spring 520 is coaxially fixed to the end of the plunger hole 510 near the first oil passage hole 511, and the second spring 530 is coaxially fixed to the plunger hole 510. At one end near the second oil passage 512, the first pin 540 is fixedly connected to the movable end of the first spring 520, and the second pin 550 is fixedly connected to the movable end of the second spring 530. The first pin 540 and the second pin 550 are respectively slidably engaged with the plunger hole 510. When the first spring 520 and the second spring 530 are not subjected to external force, the first pin 540 and the second pin 550 simultaneously isolate the first oil passage 511 and the second oil passage 512. When not subjected to external force, the sum of the lengths of the first spring 520 and the second spring 530 is two-thirds of the length of the plunger hole 510.

[0043] The technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

[0044] The first pin 540 and the second pin 550 are arranged, and the first pin 540 and the second pin 550 are spaced apart by a distance. When the crane is in action, oil enters the plunger hole 510 from the first oil passage hole 511 or the second oil passage hole 512, and pushes the first pin 540 or the second pin 550 to move forward, so that the first pin 540 and the second pin 550 are close to each other. During the process of approaching, only one spring is stretched and deformed. The movement speed of the pin is relatively fast during this process; when the first pin 540 and the second pin 550 contact, the other spring is only compressed and the first oil passage hole 511 and the second oil passage hole 512 are connected, so as to ensure that the camera does not rotate immediately when the crane vibrates slightly, and the camera remains stable when the camera vibrates slightly. When the crane moves greatly, the camera can be buffered faster. Secondly, only one spring is stretched and deformed each time, and the other spring only needs to be compressed by a small amount. Compared with the mode that two springs deform at the same time, the embodiment reduces the action frequency of the spring, increases the service life of the spring, and at the same time, the stabilizer is more sensitive. The technical problem that the buffer reaction of the stabilizer is slow when the crane moves suddenly and greatly, and two springs need to deform at the same time every time, resulting in a short service life, is solved. The technical effect that the stabilizer can buffer faster when the crane suddenly moves greatly, and the service life of the device is improved, is achieved.

[0045] Embodiment two: considering that the first pin 540 and the second pin 550 in the above embodiment one maintain a certain distance, oil will penetrate and fill in the space between the two. When one of the first pin 540 and the second pin 550 approaches the other, it may push the oil between the two forward, and the oil exerts pressure on the front, thereby causing a certain resistance to the first pin 540 or the second pin 550. Therefore, the device needs to be improved, as shown in Figure 5 and Figure 6 The specific structure is as follows:

[0046] The plunger hole 510 is rectangular in cross section; the first and second column pins 540 and 550 are trapezoidal blocks, the shorter base of the trapezoidal cross section of the first column pin 540 is close to one side of the first oil passage hole 511, and the shorter base of the trapezoidal cross section of the second column pin 550 is close to one side of the second oil passage hole 512; the first and second column pins 540 and 550 are the same in shape and size, the inclined surfaces of the two are oppositely arranged, and the two can be combined into a rectangular block after being fitted together, and the upper and lower two bases of the first column pin 540 leave a gap of 0.2-0.6 mm between the side wall of the plunger hole 510, so that the first column pin 540 can be inclined in the plunger hole 510.

[0047] The technical solutions in the embodiments of the application have at least the following technical effects or advantages:

[0048] In the embodiments, the plunger hole 510 is set as a hole with a rectangular cross section, and the first and second column pins 540 and 550 are set as trapezoidal blocks, so that Figure 6 When one of the first and second column pins 540 and 550 approaches the other, the shorter base of the trapezoid will lose balance and tilt, leaving a gap between the column pin and the hole wall of the plunger hole 510, so that the oil between the first and second column pins 540 and 550 can pass through the gap, and the inclined column pin is subjected to less resistance; the technical problem of the first and second column pins 540 and 550 being subjected to large resistance when advancing is solved, and the technical effect of being able to discharge oil from one side while cooperating with the inclination of the first and second column pins 540 and 550 to reduce the resistance when advancing is achieved.

[0049] In the embodiments, the first and second column pins 540 and 550 can tilt to reduce resistance when advancing, but the degree of inclination of the column pin may be unstable due to the influence of the oil on the driving force, so further improvement is needed to make the process of reducing the resistance of the first and second column pins 540 and 550 more stable, such as Figure 7 and Figure 8 The specific structure is as follows:

[0050] The connecting bag 560 is a cylindrical elastic bag body, and is coaxially arranged with the plunger hole 510, with both ends open and the edges of the openings fixedly connected with the opposite edges of the first and second pins 540 and 550 respectively, so that a closed space is formed among the first pin 540, the second pin 550 and the connecting bag 560, and the closed space is filled with gas; the elastic coefficient of the connecting bag 560 is smaller than that of the first or second spring 520 or 530, so that the connecting bag 560 is more easily stretched than the first or second spring 520 or 530;

[0051] The first and second liquid discharge channels 570 and 580 are arranged in the swing block 500, the second liquid discharge channel 580 is arranged in the side wall of the swing block 500 close to the first oil passage hole 511, and both ends of the second liquid discharge channel 580 are communicated with the plunger hole 510, one end of the second liquid discharge channel 580 is close to the connecting bag 560 when the first pin 540 is in the initial position, and the other end of the second liquid discharge channel 580 is close to the second oil passage hole 512 when the second pin 550 is not subjected to external force;

[0052] The first liquid discharge channel 570 is arranged in the side wall of the swing block 500 close to the second oil passage hole 512, and both ends of the first liquid discharge channel 570 are communicated with the plunger hole 510, one end of the first liquid discharge channel 570 is close to the connecting bag 560 when the second pin 550 is in the initial position, and the other end of the first liquid discharge channel 570 is close to the second oil passage hole 512 when the first pin 540 is not subjected to external force;

[0053] When the first pin 540 and the second pin 550 are not subjected to the oil pressure, the connecting bag 560 is in a stretched state, at this time, the diameter of the connecting bag 560 is reduced, when the first pin 540 or the second pin 550 is subjected to the oil pressure, the distance between the first pin 540 and the second pin 550 is shortened, the connecting bag 560 is contracted along the axial direction, and at the same time, due to the constant amount of gas in the connecting bag 560, the radial expansion of the connecting bag 560 discharges the oil from the first or second liquid discharge channel 570 or 580.

[0054] The technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

[0055] The embodiment sets the connecting bag 560, the closed space is formed among the connecting bag 560, the first pin 540 and the second pin 550, the closed space is filled with gas, the elasticity of the connecting bag 560 is greater than the elasticity of the first spring 520 or the second spring 530, when the first pin 540 and the second pin 550 are not subjected to external force, the connecting bag 560 is in a stretched state, thereby pre-giving the first pin 540 or the second pin 550 a potential energy of approaching each other, when the first pin 540 or the second pin 550 is pushed by the oil liquid from the first oil hole 511 or the second oil hole 512, the connecting bag 560 helps to pull the first pin 540 or the second pin 550, and the gas in the connecting bag 560 continuously extrudes the oil liquid in the radial direction of the connecting bag 560 after gathering, thereby discharging part of the oil liquid between the first pin 540 and the second pin 550 through the first liquid discharge channel 570 or the second liquid discharge channel 580, thereby making the process of reducing the resistance between the pins more stable, and the pins are subjected to smaller resistance, and the discharged oil liquid increases the hydraulic pressure, thereby further helping the movement of the first pin 540 or the second pin 550.

[0056] Embodiment four: considering that the action process of the crane is irregular, the action amplitude may be large or small, there are intermittent small actions during large actions, and the stabilizer cannot react in time when switching back and forth, so that the pressure on the first pin 540 or the second pin 550 fluctuates, the plunger hole 510 fluctuates between being open and closed, thereby causing the damping effect of the stabilizer to be unstable, so the device needs to be improved, such as Figure 9 and Figure 10 as shown in the specific structure as follows:

[0057] The magnetic ball 561 is movably arranged in the connecting bag 560, the magnetic ball 561 is a spherical body with magnetism;

[0058] The ball groove 590 is arranged on the side wall of the first oil hole 511 away from the second oil hole 512, the ball groove 590 is a semispherical groove, the permanent magnet 591 is embedded in the ball groove 590, the permanent magnet 591 is a permanent magnet and can be magnetically attracted to the magnetic ball 561, the diameter of the ball groove 590 is greater than the diameter of the magnetic ball 561, and the diameter of the ball groove 590 is matched with the diameter of the magnetic ball 561;

[0059] The combination of the ball groove 590 and the permanent magnet 591 is two, which are arranged on the side wall of the first oil hole 511 and the side wall of the second oil hole 512 respectively, and the ball groove 590 on the second oil hole 512 is arranged on the side wall away from the first oil hole 511;

[0060] as Figure 10As shown, when the second pin 550 is pushed by the oil liquid and abuts against the first pin 540, the magnetic ball 561 is extruded into the first oil hole 511 by the inclined surfaces of the first pin 540 and the second pin 550, the magnetic ball 561 is attracted by the magnetic force of the permanent magnet 591, and the upper part of the connecting bag 560 is deformed and clamped into the ball groove 590. When the movement amplitude of the crane fluctuates, the magnetic ball 561 provides a pulling force to the connecting bag 560, and the connecting bag 560 pulls the second pin 550, so that the shaking of the second pin 550 is reduced.

[0061] The technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

[0062] In the embodiment, the ball groove 590 and the permanent magnet 591 are arranged on the swing block 500, the magnetic ball 561 is arranged in the connecting bag 560, and the magnetic ball 561 is extruded upward after the first pin 540 and the second pin 550 abut against each other. The magnetic ball 561 is close to the ball groove 590 after being extruded, and is thus adsorbed by the permanent magnet 591. When the crane has a short pause in large-scale operation, the magnetic ball 561 fixes the connecting bag 560 under the adsorption of the permanent magnet 591, the connecting bag 560 temporarily pulls the first pin 540 and the second pin 550, so that the first pin 540 and the second pin 550 do not immediately rebound (because the magnetic force of the permanent magnet 591 on the magnetic ball 561 is smaller than the pulling force of the spring, when the crane is completely stable, the hydraulic pressure acting on the pin disappears, and the elastic force of the spring overcomes the magnetic force to return the pin to the original position). When the crane continues to operate in a large scale, the oil liquid pressure increases, so that the plunger hole 510 is continuously conducted, and the damping effect of the stabilizer is more stable and has higher continuity, and the fluctuation of the first pin 540 and the second pin 550 is reduced.

[0063] In the embodiment, the ball groove 590 and the permanent magnet 591 are arranged on the swing block 500, the magnetic ball 561 is arranged in the connecting bag 560, and the magnetic ball 561 is extruded upward after the first pin 540 and the second pin 550 abut against each other. The magnetic ball 561 is close to the ball groove 590 after being extruded, and is thus adsorbed by the permanent magnet 591. When the crane has a short pause in large-scale operation, the magnetic ball 561 fixes the connecting bag 560 under the adsorption of the permanent magnet 591, the connecting bag 560 temporarily pulls the first pin 540 and the second pin 550, so that the first pin 540 and the second pin 550 do not immediately rebound (because the magnetic force of the permanent magnet 591 on the magnetic ball 561 is smaller than the pulling force of the spring, when the crane is completely stable, the hydraulic pressure acting on the pin disappears, and the elastic force of the spring overcomes the magnetic force to return the pin to the original position). When the crane continues to operate in a large scale, the oil liquid pressure increases, so that the plunger hole 510 is continuously conducted, and the damping effect of the stabilizer is more stable and has higher continuity, and the fluctuation of the first pin 540 and the second pin 550 is reduced. Figure 11 and Figure 12 As shown, the specific structure is as follows:

[0064] The magnetic ball 561 is a hollow ball, the magnetic ball 561 is made of elastic rubber material, the inside of the magnetic ball 561 is filled with gas and magnetic powder 562, the gas makes the magnetic ball 561 maintain a spherical shape when the whole magnetic ball 561 is not subjected to external force, and provides elastic force for the whole magnetic ball 561, so that the magnetic ball 561 is more easily extruded by the inclined surfaces of the first pin 540 and the second pin 550, and the magnetic powder 562 is a particle with magnetism and can be attracted to the permanent magnet 591.

[0065] The permanent magnet 591 is embedded in the inner wall of the ball groove 590, so that the magnetic powder 562 is attracted by the permanent magnet 591 and can be fully laid in the ball groove 590, so as to drive the surface of the magnetic ball 561 to deform and adapt to the shape of the ball groove 590;

[0066] As Figure 12 The ball groove 590 is fixed with the annular clamping block 592 at the opening edge, the outer circle edge of the clamping block 592 is fixedly connected with the opening edge of the ball groove 590, the inner circle diameter of the clamping block 592 is smaller than the diameter of the magnetic ball 561, so that when the magnetic ball 561 is attracted into the ball groove 590, the middle part of the magnetic ball 561 is concave, and the whole is in the shape of a calabash, so as to be stably clamped in the ball groove 590.

[0067] The technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

[0068] The embodiment is provided with the hollow elastic magnetic ball 561, the inside of the magnetic ball 561 is filled with gas and magnetic powder 562, the gas makes it keep spherical and elastic, the magnetic powder 562 is magnetically attracted to the permanent magnet 591, and the annular clamping block 592 is arranged at the opening of the ball groove 590, the magnetic ball 561 is deformed after being attracted into the ball groove 590 by the permanent magnet 591, so as to adapt to the shape of the clamping block 592 and the ball groove 590, so that the magnetic ball 561 is more stably clamped in the ball groove 590 and is not affected by the movement of the swing block 500.

[0069] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hydraulic stabilizer for a large port crane, comprising a main body (100), a main shaft (900), two end caps (200) and two connecting flanges (300), the end caps (200) being fixed at both ends of the main body (100), the main shaft (900) being coaxial with the main body (100) and rotatably sealed connected to the end caps (200); the cavity between the main body (100) and the main shaft (900) is filled with oil and is provided with a swing block (500) and a fixed block (400), the swing block (500) and the fixed block (400) dividing the cavity between the main body (100) and the main shaft (900) into a first chamber (600) and a second chamber (700), the fixed block (400) being fixed to the inner wall of the main body (100), and the swing block (500) being fixed to the main shaft (900); Its features are, The swing block (500) has a first oil passage hole (511), a second oil passage hole (512), and a plunger hole (510). The first oil passage hole (511) and the second oil passage hole (512) are located on the outer surface of the swing block (500). The first oil passage hole (511), the first chamber (600), and the plunger hole (510) are connected. The second oil passage hole (512), the second chamber (700), and the plunger hole (510) are also connected. The plunger hole (510) is provided with a first pin (540), a second pin (550), a first spring (520), and a second spring (530). The first spring (520) is coaxially fixed to the plunger hole (510) near the first oil passage hole (511). 1) One end of the second spring (530) is coaxially fixed to the end of the plunger hole (510) near the second oil passage hole (512). The first pin (540) is fixedly connected to the movable end of the first spring (520), and the second pin (550) is fixedly connected to the movable end of the second spring (530). The first pin (540) and the second pin (550) are respectively slidably engaged with the plunger hole (510). When the first spring (520) and the second spring (530) are not subjected to external force, the first pin (540) and the second pin (550) simultaneously isolate the first oil passage hole (511) and the second oil passage hole (512). There is a gap between the first pin (540) and the second pin (550).

2. The hydraulic stabilizer for large port cranes according to claim 1, characterized in that, When neither the first spring (520) nor the second spring (530) is subjected to external force, the sum of the lengths of the first spring (520) and the second spring (530) is two-thirds of the length of the plunger hole (510).

3. The hydraulic stabilizer for large port cranes according to claim 1, characterized in that, The plunger hole (510) has a rectangular cross-section; the first pin (540) and the second pin (550) are trapezoidal blocks. The first pin (540) and the second pin (550) have the same shape and size. Their inclined surfaces are set opposite to each other, and they can be assembled into a rectangular block after being fitted together.

4. The hydraulic stabilizer for large port cranes according to claim 3, characterized in that, The first pin (540) has a gap of 0.2 mm to 0.6 mm between its upper and lower bottom edges and the side wall of the plunger hole (510), so that the first pin (540) can tilt in the plunger hole (510).

5. The hydraulic stabilizer for large port cranes according to claim 1 or 3, characterized in that, A connecting bladder (560) is provided between the opposing surfaces of the first pin (540) and the second pin (550). The connecting bladder (560) is a cylindrical elastic bladder. The connecting bladder (560) is coaxially arranged with the plunger hole (510). It is open at both ends, and the edges of the openings are fixedly connected to the opposing edges of the first pin (540) and the second pin (550), respectively. A sealed space is formed between the first pin (540), the second pin (550), and the connecting bladder (560), and the sealed space is filled with gas. The elastic coefficient of the connecting bladder (560) is less than that of the first spring (520) or the second spring (530), making the connecting bladder (560) easier to stretch than the first spring (520) or the second spring (530). The swing block (500) has a first drainage channel (570) and a second drainage channel (580).

6. The hydraulic stabilizer for large port cranes according to claim 5, characterized in that, The second drain channel (580) is opened in the side wall of the swing block (500) near the first oil passage (511), and both ends are connected to the plunger hole (510). One end is located near the connecting bladder (560) when the first pin (540) is in its initial position, and the other end is located near the second oil passage (512) when the second pin (550) is not subjected to external force. The first drain channel (570) is opened in the side wall of the swing block (500) near the second oil passage (512), and both ends of it are connected to the plunger hole (510). One end is located near the connecting bladder (560) when the second pin (550) is in its initial position, and the other end is located near the second oil passage (512) when the first pin (540) is not subjected to external force. When the first pin (540) and the second pin (550) are both in a state without oil pressure, the connecting bladder (560) is in a stretched state. At this time, the diameter of the connecting bladder (560) is reduced. When the first pin (540) or the second pin (550) is in a state of being pushed by oil, the distance between the first pin (540) and the second pin (550) is shortened, and the connecting bladder (560) contracts axially. At the same time, since the amount of gas inside the connecting bladder (560) remains unchanged, the radial expansion of the connecting bladder (560) will discharge the oil from the first drain channel (570) or the second drain channel (580).

7. The hydraulic stabilizer for large port cranes according to claim 6, characterized in that, A magnetic ball (561) is movably disposed inside the connecting pouch (560), and the magnetic ball (561) is a sphere with magnetism; A ball groove (590) is provided on the side wall of the first oil passage (511) away from the second oil passage (512). The ball groove (590) is a hemispherical groove. A fixed magnet (591) is embedded in the ball groove (590). The fixed magnet (591) is a permanent magnet that can magnetically attract the magnetic ball (561). The diameter of the ball groove (590) is larger than the diameter of the magnetic ball (561). The diameter of the ball groove (590) is adapted to the diameter of the magnetic ball (561).

8. The hydraulic stabilizer for large port cranes according to claim 7, characterized in that, There are two combinations of ball groove (590) and fixed magnet (591), which are respectively set on the side wall of the first oil passage (511) and the side wall of the second oil passage (512); the ball groove (590) on the second oil passage (512) is set on the side wall away from the first oil passage (511).

9. The hydraulic stabilizer for large port cranes according to claim 8, characterized in that, The magnetic ball (561) is a hollow sphere made of elastic rubber. The magnetic ball (561) is filled with gas and magnetic powder (562). The gas keeps the magnetic ball (561) spherical when it is not subjected to external force, and at the same time provides elasticity to the magnetic ball (561), making it easier for the magnetic ball (561) to be squeezed out by the inclined surfaces of the first pin (540) and the second pin (550). The magnetic powder (562) is a magnetic particle that can attract the fixed magnet (591). The fixed magnet (591) is embedded in the inner wall of the ball groove (590), so that the magnetic powder (562) can be completely spread in the ball groove (590) after being attracted by the fixed magnet (591), thereby causing the surface of the magnetic ball (561) to deform and adapt to the shape of the ball groove (590).

10. The hydraulic stabilizer for large port cranes according to claim 9, characterized in that, An annular locking block (592) is fixed to the edge of the opening of the ball groove (590). The outer edge of the locking block (592) is fixedly connected to the edge of the opening of the ball groove (590). The inner diameter of the locking block (592) is smaller than the diameter of the magnetic ball (561), so that when the magnetic ball (561) is magnetically attracted into the ball groove (590), the middle part of the magnetic ball (561) is concave, and the whole is gourd-shaped, thus being stably locked in the ball groove (590).

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